diff --git a/Readme.md b/Readme.md
index dc7304f..fe0ec0e 100644
--- a/Readme.md
+++ b/Readme.md
@@ -2,9 +2,16 @@
 
 # extension-testing-example
 
-Browser extension example using Parcel, Mocha, Sinon-Chrome and Chrome API.
+Browser extension example using ES Modules and browser testing with Mocha, Chai
+and Sinon.  Specifically testing in the browser to exercise the browser APIs
+available to extensions.
 
-Hoping to make it work with Firefox then Safari next.
+Test browser APIs directly where possible and mock with Sinon otherwise.
+Sinon-chrome is available to mock chrome but ideally it would mock Firefox too.
+webextension-polyfill is used to standardize the `browser` API but have not
+tried mocking that yet.
+
+Aiming for this to work in at least Chrome, Firefox and Safari.
 
 # Build
 
@@ -12,25 +19,21 @@ Hoping to make it work with Firefox then Safari next.
 git clone [this repo]
 cd extension-testing-example
 npm install
-npm run build # runs parcel build src/manifest.json
+npm run build # runs parcel
 ```
 
-Then you should be able to load the `dist/` directory into your Chrome browser
-as an extension and see Fibonacci greatness.
-
-If you need unminified builds you can pass a flag to Parcel.
+Then you should be able to load the `dist/` directory into your browser as an
+extension and see Fibonacci greatness.
 
-```
-npx parcel build --no-minify --no-source-maps src/manifest.json
-```
+# Run Tests
 
-# Unit Tests
+Click the tests button in the extension popup to run the tests in separate html
+page.
 
-```
-npm test # runs mocha
-```
+You can also load the test runner using a web server rather than extension
+protocol with `npm run server` and `http://127.0.0.1:8080/test.html`.
 
 # Integration Tests
 
-Planning to use Puppeteer here (Chrome only) to start out with.
+Integration tests or e2e yet to be introduced, plan is to use webdriverio.
 
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index 6325df1..0000000
--- a/package-lock.json
+++ /dev/null
@@ -1,7967 +0,0 @@
-{
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-      "dev": true,
-      "requires": {
-        "@babel/highlight": "^7.0.0"
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-}
diff --git a/package.json b/package.json
index 95e5104..0886f65 100644
--- a/package.json
+++ b/package.json
@@ -3,19 +3,29 @@
   "version": "1.0.0",
   "description": "",
   "main": "src/manifest.json",
+  "engines": {
+    "node": ">=8"
+  },
   "directories": {
     "test": "tests"
   },
   "scripts": {
-    "test": "mocha",
-    "build": "parcel build src/manifest.json"
+    "server": "http-server -c-1 src",
+    "build": "parcel build --public-url ./ --no-minify --no-source-maps src/manifest.json",
+    "build:prod": "parcel build --public-url ./ src/manifest.json"
   },
   "keywords": [],
   "author": "",
   "license": "ISC",
   "devDependencies": {
+    "chai": "^4.2.0",
+    "http-server": "^0.11.1",
     "mocha": "^6.0.1",
-    "parcel-plugin-web-extension": "^1.5.1",
-    "sinon-chrome": "^2.3.2"
+    "parcel-plugin-web-extension": "^1.5.2",
+    "sinon": "^7.2.7",
+    "webpack": "^4.29.6"
+  },
+  "dependencies": {
+    "webextension-polyfill": "^0.4.0"
   }
 }
diff --git a/src/background.js b/src/background.js
index 2583b92..1f6fa77 100644
--- a/src/background.js
+++ b/src/background.js
@@ -20,11 +20,10 @@
  * when they are created.
  */
 
-'use strict';
-
-const state = require('./state');
-
-module.exports = (browser) => {
+import state from './state.js'
+//import browser from './browser.js'
+//const browser = chrome;
+import browser from './browser.js'
 
 const setBadge = (str, id) => {
   browser.browserAction.setBadgeText({
@@ -43,6 +42,7 @@ const tabActivated = (props) => {
  * complete.
  */
 const tabUpdated = (id, props = {}, tab = {}) => {
+  console.log('tabUpdated', id);
   let val = state.getVal(id);
   if (props.status === 'loading') {
     val = state.nextVal(id);
@@ -61,7 +61,7 @@ browser.tabs.onRemoved.addListener(tabRemoved);
 /*
  * Initialize tab values and set badge on active tab.
  */
-browser.tabs.query({currentWindow: true}, allTabs => {
+browser.tabs.query({currentWindow: true}).then(allTabs => {
   allTabs.map(tab => {
     let val = state.nextVal(tab.id);
     if (tab.active) {
@@ -77,9 +77,3 @@ browser.tabs.query({currentWindow: true}, allTabs => {
 browser.runtime.onInstalled.addListener(details => {
   //console.log(navigator.userAgent);
 });
-
-}
-
-if (chrome) {
-  module.exports(chrome);
-}
diff --git a/src/background.test.js b/src/background.test.js
new file mode 100644
index 0000000..23f7c5b
--- /dev/null
+++ b/src/background.test.js
@@ -0,0 +1,29 @@
+import chai from './chai.js'
+import browser from './browser.js'
+
+const expect = chai.expect
+
+console.log('testing background worker');
+
+/*
+ * Nothing is exported from background.js atm, so here just test similar calls
+ * it makes to browser.
+ */
+describe('background worker', function () {
+  it('sets badge value when tab is activate', () => {
+    //chrome.tabs.onUpdated(); const tabUpdated = (id, props = {}, tab = {}) => {
+    browser.tabs.onUpdated.dispatch(10, {status: 'loading'});
+    //chrome.tabs.create({url: '', active: true});
+    /*browser.tabs.query({currentWindow: true}, allTabs => {
+      console.log('allTabs');
+      console.log(allTabs);
+    });
+    */
+    //chrome.tabs.update({url: 'http://example.com'}, (tab) => {
+    //  console.log(arguments);
+    //});
+  });
+  it('can determine truth', () => {
+    expect(Boolean('truth')).to.be.true;
+  });
+});
diff --git a/src/browser-polyfill.js b/src/browser-polyfill.js
new file mode 100644
index 0000000..ff95de8
--- /dev/null
+++ b/src/browser-polyfill.js
@@ -0,0 +1,1187 @@
+(function (global, factory) {
+  if (typeof define === "function" && define.amd) {
+    define("webextension-polyfill", ["module"], factory);
+  } else if (typeof exports !== "undefined") {
+    factory(module);
+  } else {
+    var mod = {
+      exports: {}
+    };
+    factory(mod);
+    global.browser = mod.exports;
+  }
+})(this, function (module) {
+  /* webextension-polyfill - v0.4.0 - Wed Feb 06 2019 11:58:31 */
+  /* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+  /* vim: set sts=2 sw=2 et tw=80: */
+  /* This Source Code Form is subject to the terms of the Mozilla Public
+   * License, v. 2.0. If a copy of the MPL was not distributed with this
+   * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+  "use strict";
+
+  if (typeof browser === "undefined" || Object.getPrototypeOf(browser) !== Object.prototype) {
+    const CHROME_SEND_MESSAGE_CALLBACK_NO_RESPONSE_MESSAGE = "The message port closed before a response was received.";
+    const SEND_RESPONSE_DEPRECATION_WARNING = "Returning a Promise is the preferred way to send a reply from an onMessage/onMessageExternal listener, as the sendResponse will be removed from the specs (See https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/runtime/onMessage)";
+
+    // Wrapping the bulk of this polyfill in a one-time-use function is a minor
+    // optimization for Firefox. Since Spidermonkey does not fully parse the
+    // contents of a function until the first time it's called, and since it will
+    // never actually need to be called, this allows the polyfill to be included
+    // in Firefox nearly for free.
+    const wrapAPIs = extensionAPIs => {
+      // NOTE: apiMetadata is associated to the content of the api-metadata.json file
+      // at build time by replacing the following "include" with the content of the
+      // JSON file.
+      const apiMetadata = {
+        "alarms": {
+          "clear": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "clearAll": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "get": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "getAll": {
+            "minArgs": 0,
+            "maxArgs": 0
+          }
+        },
+        "bookmarks": {
+          "create": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "get": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getChildren": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getRecent": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getSubTree": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getTree": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "move": {
+            "minArgs": 2,
+            "maxArgs": 2
+          },
+          "remove": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removeTree": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "search": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "update": {
+            "minArgs": 2,
+            "maxArgs": 2
+          }
+        },
+        "browserAction": {
+          "disable": {
+            "minArgs": 0,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          },
+          "enable": {
+            "minArgs": 0,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          },
+          "getBadgeBackgroundColor": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getBadgeText": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getPopup": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getTitle": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "openPopup": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "setBadgeBackgroundColor": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          },
+          "setBadgeText": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          },
+          "setIcon": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "setPopup": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          },
+          "setTitle": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          }
+        },
+        "browsingData": {
+          "remove": {
+            "minArgs": 2,
+            "maxArgs": 2
+          },
+          "removeCache": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removeCookies": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removeDownloads": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removeFormData": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removeHistory": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removeLocalStorage": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removePasswords": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removePluginData": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "settings": {
+            "minArgs": 0,
+            "maxArgs": 0
+          }
+        },
+        "commands": {
+          "getAll": {
+            "minArgs": 0,
+            "maxArgs": 0
+          }
+        },
+        "contextMenus": {
+          "remove": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removeAll": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "update": {
+            "minArgs": 2,
+            "maxArgs": 2
+          }
+        },
+        "cookies": {
+          "get": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getAll": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getAllCookieStores": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "remove": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "set": {
+            "minArgs": 1,
+            "maxArgs": 1
+          }
+        },
+        "devtools": {
+          "inspectedWindow": {
+            "eval": {
+              "minArgs": 1,
+              "maxArgs": 2,
+              "singleCallbackArg": false
+            }
+          },
+          "panels": {
+            "create": {
+              "minArgs": 3,
+              "maxArgs": 3,
+              "singleCallbackArg": true
+            }
+          }
+        },
+        "downloads": {
+          "cancel": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "download": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "erase": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getFileIcon": {
+            "minArgs": 1,
+            "maxArgs": 2
+          },
+          "open": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          },
+          "pause": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removeFile": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "resume": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "search": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "show": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          }
+        },
+        "extension": {
+          "isAllowedFileSchemeAccess": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "isAllowedIncognitoAccess": {
+            "minArgs": 0,
+            "maxArgs": 0
+          }
+        },
+        "history": {
+          "addUrl": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "deleteAll": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "deleteRange": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "deleteUrl": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getVisits": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "search": {
+            "minArgs": 1,
+            "maxArgs": 1
+          }
+        },
+        "i18n": {
+          "detectLanguage": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getAcceptLanguages": {
+            "minArgs": 0,
+            "maxArgs": 0
+          }
+        },
+        "identity": {
+          "launchWebAuthFlow": {
+            "minArgs": 1,
+            "maxArgs": 1
+          }
+        },
+        "idle": {
+          "queryState": {
+            "minArgs": 1,
+            "maxArgs": 1
+          }
+        },
+        "management": {
+          "get": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getAll": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "getSelf": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "setEnabled": {
+            "minArgs": 2,
+            "maxArgs": 2
+          },
+          "uninstallSelf": {
+            "minArgs": 0,
+            "maxArgs": 1
+          }
+        },
+        "notifications": {
+          "clear": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "create": {
+            "minArgs": 1,
+            "maxArgs": 2
+          },
+          "getAll": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "getPermissionLevel": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "update": {
+            "minArgs": 2,
+            "maxArgs": 2
+          }
+        },
+        "pageAction": {
+          "getPopup": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getTitle": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "hide": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          },
+          "setIcon": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "setPopup": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          },
+          "setTitle": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          },
+          "show": {
+            "minArgs": 1,
+            "maxArgs": 1,
+            "fallbackToNoCallback": true
+          }
+        },
+        "permissions": {
+          "contains": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getAll": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "remove": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "request": {
+            "minArgs": 1,
+            "maxArgs": 1
+          }
+        },
+        "runtime": {
+          "getBackgroundPage": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "getBrowserInfo": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "getPlatformInfo": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "openOptionsPage": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "requestUpdateCheck": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "sendMessage": {
+            "minArgs": 1,
+            "maxArgs": 3
+          },
+          "sendNativeMessage": {
+            "minArgs": 2,
+            "maxArgs": 2
+          },
+          "setUninstallURL": {
+            "minArgs": 1,
+            "maxArgs": 1
+          }
+        },
+        "sessions": {
+          "getDevices": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "getRecentlyClosed": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "restore": {
+            "minArgs": 0,
+            "maxArgs": 1
+          }
+        },
+        "storage": {
+          "local": {
+            "clear": {
+              "minArgs": 0,
+              "maxArgs": 0
+            },
+            "get": {
+              "minArgs": 0,
+              "maxArgs": 1
+            },
+            "getBytesInUse": {
+              "minArgs": 0,
+              "maxArgs": 1
+            },
+            "remove": {
+              "minArgs": 1,
+              "maxArgs": 1
+            },
+            "set": {
+              "minArgs": 1,
+              "maxArgs": 1
+            }
+          },
+          "managed": {
+            "get": {
+              "minArgs": 0,
+              "maxArgs": 1
+            },
+            "getBytesInUse": {
+              "minArgs": 0,
+              "maxArgs": 1
+            }
+          },
+          "sync": {
+            "clear": {
+              "minArgs": 0,
+              "maxArgs": 0
+            },
+            "get": {
+              "minArgs": 0,
+              "maxArgs": 1
+            },
+            "getBytesInUse": {
+              "minArgs": 0,
+              "maxArgs": 1
+            },
+            "remove": {
+              "minArgs": 1,
+              "maxArgs": 1
+            },
+            "set": {
+              "minArgs": 1,
+              "maxArgs": 1
+            }
+          }
+        },
+        "tabs": {
+          "captureVisibleTab": {
+            "minArgs": 0,
+            "maxArgs": 2
+          },
+          "create": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "detectLanguage": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "discard": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "duplicate": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "executeScript": {
+            "minArgs": 1,
+            "maxArgs": 2
+          },
+          "get": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getCurrent": {
+            "minArgs": 0,
+            "maxArgs": 0
+          },
+          "getZoom": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "getZoomSettings": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "highlight": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "insertCSS": {
+            "minArgs": 1,
+            "maxArgs": 2
+          },
+          "move": {
+            "minArgs": 2,
+            "maxArgs": 2
+          },
+          "query": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "reload": {
+            "minArgs": 0,
+            "maxArgs": 2
+          },
+          "remove": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "removeCSS": {
+            "minArgs": 1,
+            "maxArgs": 2
+          },
+          "sendMessage": {
+            "minArgs": 2,
+            "maxArgs": 3
+          },
+          "setZoom": {
+            "minArgs": 1,
+            "maxArgs": 2
+          },
+          "setZoomSettings": {
+            "minArgs": 1,
+            "maxArgs": 2
+          },
+          "update": {
+            "minArgs": 1,
+            "maxArgs": 2
+          }
+        },
+        "topSites": {
+          "get": {
+            "minArgs": 0,
+            "maxArgs": 0
+          }
+        },
+        "webNavigation": {
+          "getAllFrames": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "getFrame": {
+            "minArgs": 1,
+            "maxArgs": 1
+          }
+        },
+        "webRequest": {
+          "handlerBehaviorChanged": {
+            "minArgs": 0,
+            "maxArgs": 0
+          }
+        },
+        "windows": {
+          "create": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "get": {
+            "minArgs": 1,
+            "maxArgs": 2
+          },
+          "getAll": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "getCurrent": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "getLastFocused": {
+            "minArgs": 0,
+            "maxArgs": 1
+          },
+          "remove": {
+            "minArgs": 1,
+            "maxArgs": 1
+          },
+          "update": {
+            "minArgs": 2,
+            "maxArgs": 2
+          }
+        }
+      };
+
+      if (Object.keys(apiMetadata).length === 0) {
+        throw new Error("api-metadata.json has not been included in browser-polyfill");
+      }
+
+      /**
+       * A WeakMap subclass which creates and stores a value for any key which does
+       * not exist when accessed, but behaves exactly as an ordinary WeakMap
+       * otherwise.
+       *
+       * @param {function} createItem
+       *        A function which will be called in order to create the value for any
+       *        key which does not exist, the first time it is accessed. The
+       *        function receives, as its only argument, the key being created.
+       */
+      class DefaultWeakMap extends WeakMap {
+        constructor(createItem, items = undefined) {
+          super(items);
+          this.createItem = createItem;
+        }
+
+        get(key) {
+          if (!this.has(key)) {
+            this.set(key, this.createItem(key));
+          }
+
+          return super.get(key);
+        }
+      }
+
+      /**
+       * Returns true if the given object is an object with a `then` method, and can
+       * therefore be assumed to behave as a Promise.
+       *
+       * @param {*} value The value to test.
+       * @returns {boolean} True if the value is thenable.
+       */
+      const isThenable = value => {
+        return value && typeof value === "object" && typeof value.then === "function";
+      };
+
+      /**
+       * Creates and returns a function which, when called, will resolve or reject
+       * the given promise based on how it is called:
+       *
+       * - If, when called, `chrome.runtime.lastError` contains a non-null object,
+       *   the promise is rejected with that value.
+       * - If the function is called with exactly one argument, the promise is
+       *   resolved to that value.
+       * - Otherwise, the promise is resolved to an array containing all of the
+       *   function's arguments.
+       *
+       * @param {object} promise
+       *        An object containing the resolution and rejection functions of a
+       *        promise.
+       * @param {function} promise.resolve
+       *        The promise's resolution function.
+       * @param {function} promise.rejection
+       *        The promise's rejection function.
+       * @param {object} metadata
+       *        Metadata about the wrapped method which has created the callback.
+       * @param {integer} metadata.maxResolvedArgs
+       *        The maximum number of arguments which may be passed to the
+       *        callback created by the wrapped async function.
+       *
+       * @returns {function}
+       *        The generated callback function.
+       */
+      const makeCallback = (promise, metadata) => {
+        return (...callbackArgs) => {
+          if (extensionAPIs.runtime.lastError) {
+            promise.reject(extensionAPIs.runtime.lastError);
+          } else if (metadata.singleCallbackArg || callbackArgs.length <= 1 && metadata.singleCallbackArg !== false) {
+            promise.resolve(callbackArgs[0]);
+          } else {
+            promise.resolve(callbackArgs);
+          }
+        };
+      };
+
+      const pluralizeArguments = numArgs => numArgs == 1 ? "argument" : "arguments";
+
+      /**
+       * Creates a wrapper function for a method with the given name and metadata.
+       *
+       * @param {string} name
+       *        The name of the method which is being wrapped.
+       * @param {object} metadata
+       *        Metadata about the method being wrapped.
+       * @param {integer} metadata.minArgs
+       *        The minimum number of arguments which must be passed to the
+       *        function. If called with fewer than this number of arguments, the
+       *        wrapper will raise an exception.
+       * @param {integer} metadata.maxArgs
+       *        The maximum number of arguments which may be passed to the
+       *        function. If called with more than this number of arguments, the
+       *        wrapper will raise an exception.
+       * @param {integer} metadata.maxResolvedArgs
+       *        The maximum number of arguments which may be passed to the
+       *        callback created by the wrapped async function.
+       *
+       * @returns {function(object, ...*)}
+       *       The generated wrapper function.
+       */
+      const wrapAsyncFunction = (name, metadata) => {
+        return function asyncFunctionWrapper(target, ...args) {
+          if (args.length < metadata.minArgs) {
+            throw new Error(`Expected at least ${metadata.minArgs} ${pluralizeArguments(metadata.minArgs)} for ${name}(), got ${args.length}`);
+          }
+
+          if (args.length > metadata.maxArgs) {
+            throw new Error(`Expected at most ${metadata.maxArgs} ${pluralizeArguments(metadata.maxArgs)} for ${name}(), got ${args.length}`);
+          }
+
+          return new Promise((resolve, reject) => {
+            if (metadata.fallbackToNoCallback) {
+              // This API method has currently no callback on Chrome, but it return a promise on Firefox,
+              // and so the polyfill will try to call it with a callback first, and it will fallback
+              // to not passing the callback if the first call fails.
+              try {
+                target[name](...args, makeCallback({ resolve, reject }, metadata));
+              } catch (cbError) {
+                console.warn(`${name} API method doesn't seem to support the callback parameter, ` + "falling back to call it without a callback: ", cbError);
+
+                target[name](...args);
+
+                // Update the API method metadata, so that the next API calls will not try to
+                // use the unsupported callback anymore.
+                metadata.fallbackToNoCallback = false;
+                metadata.noCallback = true;
+
+                resolve();
+              }
+            } else if (metadata.noCallback) {
+              target[name](...args);
+              resolve();
+            } else {
+              target[name](...args, makeCallback({ resolve, reject }, metadata));
+            }
+          });
+        };
+      };
+
+      /**
+       * Wraps an existing method of the target object, so that calls to it are
+       * intercepted by the given wrapper function. The wrapper function receives,
+       * as its first argument, the original `target` object, followed by each of
+       * the arguments passed to the original method.
+       *
+       * @param {object} target
+       *        The original target object that the wrapped method belongs to.
+       * @param {function} method
+       *        The method being wrapped. This is used as the target of the Proxy
+       *        object which is created to wrap the method.
+       * @param {function} wrapper
+       *        The wrapper function which is called in place of a direct invocation
+       *        of the wrapped method.
+       *
+       * @returns {Proxy<function>}
+       *        A Proxy object for the given method, which invokes the given wrapper
+       *        method in its place.
+       */
+      const wrapMethod = (target, method, wrapper) => {
+        return new Proxy(method, {
+          apply(targetMethod, thisObj, args) {
+            return wrapper.call(thisObj, target, ...args);
+          }
+        });
+      };
+
+      let hasOwnProperty = Function.call.bind(Object.prototype.hasOwnProperty);
+
+      /**
+       * Wraps an object in a Proxy which intercepts and wraps certain methods
+       * based on the given `wrappers` and `metadata` objects.
+       *
+       * @param {object} target
+       *        The target object to wrap.
+       *
+       * @param {object} [wrappers = {}]
+       *        An object tree containing wrapper functions for special cases. Any
+       *        function present in this object tree is called in place of the
+       *        method in the same location in the `target` object tree. These
+       *        wrapper methods are invoked as described in {@see wrapMethod}.
+       *
+       * @param {object} [metadata = {}]
+       *        An object tree containing metadata used to automatically generate
+       *        Promise-based wrapper functions for asynchronous. Any function in
+       *        the `target` object tree which has a corresponding metadata object
+       *        in the same location in the `metadata` tree is replaced with an
+       *        automatically-generated wrapper function, as described in
+       *        {@see wrapAsyncFunction}
+       *
+       * @returns {Proxy<object>}
+       */
+      const wrapObject = (target, wrappers = {}, metadata = {}) => {
+        let cache = Object.create(null);
+        let handlers = {
+          has(proxyTarget, prop) {
+            return prop in target || prop in cache;
+          },
+
+          get(proxyTarget, prop, receiver) {
+            if (prop in cache) {
+              return cache[prop];
+            }
+
+            if (!(prop in target)) {
+              return undefined;
+            }
+
+            let value = target[prop];
+
+            if (typeof value === "function") {
+              // This is a method on the underlying object. Check if we need to do
+              // any wrapping.
+
+              if (typeof wrappers[prop] === "function") {
+                // We have a special-case wrapper for this method.
+                value = wrapMethod(target, target[prop], wrappers[prop]);
+              } else if (hasOwnProperty(metadata, prop)) {
+                // This is an async method that we have metadata for. Create a
+                // Promise wrapper for it.
+                let wrapper = wrapAsyncFunction(prop, metadata[prop]);
+                value = wrapMethod(target, target[prop], wrapper);
+              } else {
+                // This is a method that we don't know or care about. Return the
+                // original method, bound to the underlying object.
+                value = value.bind(target);
+              }
+            } else if (typeof value === "object" && value !== null && (hasOwnProperty(wrappers, prop) || hasOwnProperty(metadata, prop))) {
+              // This is an object that we need to do some wrapping for the children
+              // of. Create a sub-object wrapper for it with the appropriate child
+              // metadata.
+              value = wrapObject(value, wrappers[prop], metadata[prop]);
+            } else {
+              // We don't need to do any wrapping for this property,
+              // so just forward all access to the underlying object.
+              Object.defineProperty(cache, prop, {
+                configurable: true,
+                enumerable: true,
+                get() {
+                  return target[prop];
+                },
+                set(value) {
+                  target[prop] = value;
+                }
+              });
+
+              return value;
+            }
+
+            cache[prop] = value;
+            return value;
+          },
+
+          set(proxyTarget, prop, value, receiver) {
+            if (prop in cache) {
+              cache[prop] = value;
+            } else {
+              target[prop] = value;
+            }
+            return true;
+          },
+
+          defineProperty(proxyTarget, prop, desc) {
+            return Reflect.defineProperty(cache, prop, desc);
+          },
+
+          deleteProperty(proxyTarget, prop) {
+            return Reflect.deleteProperty(cache, prop);
+          }
+        };
+
+        // Per contract of the Proxy API, the "get" proxy handler must return the
+        // original value of the target if that value is declared read-only and
+        // non-configurable. For this reason, we create an object with the
+        // prototype set to `target` instead of using `target` directly.
+        // Otherwise we cannot return a custom object for APIs that
+        // are declared read-only and non-configurable, such as `chrome.devtools`.
+        //
+        // The proxy handlers themselves will still use the original `target`
+        // instead of the `proxyTarget`, so that the methods and properties are
+        // dereferenced via the original targets.
+        let proxyTarget = Object.create(target);
+        return new Proxy(proxyTarget, handlers);
+      };
+
+      /**
+       * Creates a set of wrapper functions for an event object, which handles
+       * wrapping of listener functions that those messages are passed.
+       *
+       * A single wrapper is created for each listener function, and stored in a
+       * map. Subsequent calls to `addListener`, `hasListener`, or `removeListener`
+       * retrieve the original wrapper, so that  attempts to remove a
+       * previously-added listener work as expected.
+       *
+       * @param {DefaultWeakMap<function, function>} wrapperMap
+       *        A DefaultWeakMap object which will create the appropriate wrapper
+       *        for a given listener function when one does not exist, and retrieve
+       *        an existing one when it does.
+       *
+       * @returns {object}
+       */
+      const wrapEvent = wrapperMap => ({
+        addListener(target, listener, ...args) {
+          target.addListener(wrapperMap.get(listener), ...args);
+        },
+
+        hasListener(target, listener) {
+          return target.hasListener(wrapperMap.get(listener));
+        },
+
+        removeListener(target, listener) {
+          target.removeListener(wrapperMap.get(listener));
+        }
+      });
+
+      // Keep track if the deprecation warning has been logged at least once.
+      let loggedSendResponseDeprecationWarning = false;
+
+      const onMessageWrappers = new DefaultWeakMap(listener => {
+        if (typeof listener !== "function") {
+          return listener;
+        }
+
+        /**
+         * Wraps a message listener function so that it may send responses based on
+         * its return value, rather than by returning a sentinel value and calling a
+         * callback. If the listener function returns a Promise, the response is
+         * sent when the promise either resolves or rejects.
+         *
+         * @param {*} message
+         *        The message sent by the other end of the channel.
+         * @param {object} sender
+         *        Details about the sender of the message.
+         * @param {function(*)} sendResponse
+         *        A callback which, when called with an arbitrary argument, sends
+         *        that value as a response.
+         * @returns {boolean}
+         *        True if the wrapped listener returned a Promise, which will later
+         *        yield a response. False otherwise.
+         */
+        return function onMessage(message, sender, sendResponse) {
+          let didCallSendResponse = false;
+
+          let wrappedSendResponse;
+          let sendResponsePromise = new Promise(resolve => {
+            wrappedSendResponse = function (response) {
+              if (!loggedSendResponseDeprecationWarning) {
+                console.warn(SEND_RESPONSE_DEPRECATION_WARNING, new Error().stack);
+                loggedSendResponseDeprecationWarning = true;
+              }
+              didCallSendResponse = true;
+              resolve(response);
+            };
+          });
+
+          let result;
+          try {
+            result = listener(message, sender, wrappedSendResponse);
+          } catch (err) {
+            result = Promise.reject(err);
+          }
+
+          const isResultThenable = result !== true && isThenable(result);
+
+          // If the listener didn't returned true or a Promise, or called
+          // wrappedSendResponse synchronously, we can exit earlier
+          // because there will be no response sent from this listener.
+          if (result !== true && !isResultThenable && !didCallSendResponse) {
+            return false;
+          }
+
+          // A small helper to send the message if the promise resolves
+          // and an error if the promise rejects (a wrapped sendMessage has
+          // to translate the message into a resolved promise or a rejected
+          // promise).
+          const sendPromisedResult = promise => {
+            promise.then(msg => {
+              // send the message value.
+              sendResponse(msg);
+            }, error => {
+              // Send a JSON representation of the error if the rejected value
+              // is an instance of error, or the object itself otherwise.
+              let message;
+              if (error && (error instanceof Error || typeof error.message === "string")) {
+                message = error.message;
+              } else {
+                message = "An unexpected error occurred";
+              }
+
+              sendResponse({
+                __mozWebExtensionPolyfillReject__: true,
+                message
+              });
+            }).catch(err => {
+              // Print an error on the console if unable to send the response.
+              console.error("Failed to send onMessage rejected reply", err);
+            });
+          };
+
+          // If the listener returned a Promise, send the resolved value as a
+          // result, otherwise wait the promise related to the wrappedSendResponse
+          // callback to resolve and send it as a response.
+          if (isResultThenable) {
+            sendPromisedResult(result);
+          } else {
+            sendPromisedResult(sendResponsePromise);
+          }
+
+          // Let Chrome know that the listener is replying.
+          return true;
+        };
+      });
+
+      const wrappedSendMessageCallback = ({ reject, resolve }, reply) => {
+        if (extensionAPIs.runtime.lastError) {
+          // Detect when none of the listeners replied to the sendMessage call and resolve
+          // the promise to undefined as in Firefox.
+          // See https://github.com/mozilla/webextension-polyfill/issues/130
+          if (extensionAPIs.runtime.lastError.message === CHROME_SEND_MESSAGE_CALLBACK_NO_RESPONSE_MESSAGE) {
+            resolve();
+          } else {
+            reject(extensionAPIs.runtime.lastError);
+          }
+        } else if (reply && reply.__mozWebExtensionPolyfillReject__) {
+          // Convert back the JSON representation of the error into
+          // an Error instance.
+          reject(new Error(reply.message));
+        } else {
+          resolve(reply);
+        }
+      };
+
+      const wrappedSendMessage = (name, metadata, apiNamespaceObj, ...args) => {
+        if (args.length < metadata.minArgs) {
+          throw new Error(`Expected at least ${metadata.minArgs} ${pluralizeArguments(metadata.minArgs)} for ${name}(), got ${args.length}`);
+        }
+
+        if (args.length > metadata.maxArgs) {
+          throw new Error(`Expected at most ${metadata.maxArgs} ${pluralizeArguments(metadata.maxArgs)} for ${name}(), got ${args.length}`);
+        }
+
+        return new Promise((resolve, reject) => {
+          const wrappedCb = wrappedSendMessageCallback.bind(null, { resolve, reject });
+          args.push(wrappedCb);
+          apiNamespaceObj.sendMessage(...args);
+        });
+      };
+
+      const staticWrappers = {
+        runtime: {
+          onMessage: wrapEvent(onMessageWrappers),
+          onMessageExternal: wrapEvent(onMessageWrappers),
+          sendMessage: wrappedSendMessage.bind(null, "sendMessage", { minArgs: 1, maxArgs: 3 })
+        },
+        tabs: {
+          sendMessage: wrappedSendMessage.bind(null, "sendMessage", { minArgs: 2, maxArgs: 3 })
+        }
+      };
+      const settingMetadata = {
+        clear: { minArgs: 1, maxArgs: 1 },
+        get: { minArgs: 1, maxArgs: 1 },
+        set: { minArgs: 1, maxArgs: 1 }
+      };
+      apiMetadata.privacy = {
+        network: {
+          networkPredictionEnabled: settingMetadata,
+          webRTCIPHandlingPolicy: settingMetadata
+        },
+        services: {
+          passwordSavingEnabled: settingMetadata
+        },
+        websites: {
+          hyperlinkAuditingEnabled: settingMetadata,
+          referrersEnabled: settingMetadata
+        }
+      };
+
+      return wrapObject(extensionAPIs, staticWrappers, apiMetadata);
+    };
+
+    // The build process adds a UMD wrapper around this file, which makes the
+    // `module` variable available.
+    module.exports = wrapAPIs(chrome);
+  } else {
+    module.exports = browser;
+  }
+});
+//# sourceMappingURL=browser-polyfill.js.map
diff --git a/src/browser.js b/src/browser.js
new file mode 100644
index 0000000..a554028
--- /dev/null
+++ b/src/browser.js
@@ -0,0 +1,3 @@
+import browser from './browser-polyfill.js'
+export default browser
+//export default chrome
diff --git a/src/chai.js b/src/chai.js
new file mode 100644
index 0000000..39429c5
--- /dev/null
+++ b/src/chai.js
@@ -0,0 +1,10854 @@
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.chai = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
+module.exports = require('./lib/chai');
+
+},{"./lib/chai":2}],2:[function(require,module,exports){
+/*!
+ * chai
+ * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+var used = [];
+
+/*!
+ * Chai version
+ */
+
+exports.version = '4.2.0';
+
+/*!
+ * Assertion Error
+ */
+
+exports.AssertionError = require('assertion-error');
+
+/*!
+ * Utils for plugins (not exported)
+ */
+
+var util = require('./chai/utils');
+
+/**
+ * # .use(function)
+ *
+ * Provides a way to extend the internals of Chai.
+ *
+ * @param {Function}
+ * @returns {this} for chaining
+ * @api public
+ */
+
+exports.use = function (fn) {
+  if (!~used.indexOf(fn)) {
+    fn(exports, util);
+    used.push(fn);
+  }
+
+  return exports;
+};
+
+/*!
+ * Utility Functions
+ */
+
+exports.util = util;
+
+/*!
+ * Configuration
+ */
+
+var config = require('./chai/config');
+exports.config = config;
+
+/*!
+ * Primary `Assertion` prototype
+ */
+
+var assertion = require('./chai/assertion');
+exports.use(assertion);
+
+/*!
+ * Core Assertions
+ */
+
+var core = require('./chai/core/assertions');
+exports.use(core);
+
+/*!
+ * Expect interface
+ */
+
+var expect = require('./chai/interface/expect');
+exports.use(expect);
+
+/*!
+ * Should interface
+ */
+
+var should = require('./chai/interface/should');
+exports.use(should);
+
+/*!
+ * Assert interface
+ */
+
+var assert = require('./chai/interface/assert');
+exports.use(assert);
+
+},{"./chai/assertion":3,"./chai/config":4,"./chai/core/assertions":5,"./chai/interface/assert":6,"./chai/interface/expect":7,"./chai/interface/should":8,"./chai/utils":22,"assertion-error":33}],3:[function(require,module,exports){
+/*!
+ * chai
+ * http://chaijs.com
+ * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+var config = require('./config');
+
+module.exports = function (_chai, util) {
+  /*!
+   * Module dependencies.
+   */
+
+  var AssertionError = _chai.AssertionError
+    , flag = util.flag;
+
+  /*!
+   * Module export.
+   */
+
+  _chai.Assertion = Assertion;
+
+  /*!
+   * Assertion Constructor
+   *
+   * Creates object for chaining.
+   *
+   * `Assertion` objects contain metadata in the form of flags. Three flags can
+   * be assigned during instantiation by passing arguments to this constructor:
+   *
+   * - `object`: This flag contains the target of the assertion. For example, in
+   *   the assertion `expect(numKittens).to.equal(7);`, the `object` flag will
+   *   contain `numKittens` so that the `equal` assertion can reference it when
+   *   needed.
+   *
+   * - `message`: This flag contains an optional custom error message to be
+   *   prepended to the error message that's generated by the assertion when it
+   *   fails.
+   *
+   * - `ssfi`: This flag stands for "start stack function indicator". It
+   *   contains a function reference that serves as the starting point for
+   *   removing frames from the stack trace of the error that's created by the
+   *   assertion when it fails. The goal is to provide a cleaner stack trace to
+   *   end users by removing Chai's internal functions. Note that it only works
+   *   in environments that support `Error.captureStackTrace`, and only when
+   *   `Chai.config.includeStack` hasn't been set to `false`.
+   *
+   * - `lockSsfi`: This flag controls whether or not the given `ssfi` flag
+   *   should retain its current value, even as assertions are chained off of
+   *   this object. This is usually set to `true` when creating a new assertion
+   *   from within another assertion. It's also temporarily set to `true` before
+   *   an overwritten assertion gets called by the overwriting assertion.
+   *
+   * @param {Mixed} obj target of the assertion
+   * @param {String} msg (optional) custom error message
+   * @param {Function} ssfi (optional) starting point for removing stack frames
+   * @param {Boolean} lockSsfi (optional) whether or not the ssfi flag is locked
+   * @api private
+   */
+
+  function Assertion (obj, msg, ssfi, lockSsfi) {
+    flag(this, 'ssfi', ssfi || Assertion);
+    flag(this, 'lockSsfi', lockSsfi);
+    flag(this, 'object', obj);
+    flag(this, 'message', msg);
+
+    return util.proxify(this);
+  }
+
+  Object.defineProperty(Assertion, 'includeStack', {
+    get: function() {
+      console.warn('Assertion.includeStack is deprecated, use chai.config.includeStack instead.');
+      return config.includeStack;
+    },
+    set: function(value) {
+      console.warn('Assertion.includeStack is deprecated, use chai.config.includeStack instead.');
+      config.includeStack = value;
+    }
+  });
+
+  Object.defineProperty(Assertion, 'showDiff', {
+    get: function() {
+      console.warn('Assertion.showDiff is deprecated, use chai.config.showDiff instead.');
+      return config.showDiff;
+    },
+    set: function(value) {
+      console.warn('Assertion.showDiff is deprecated, use chai.config.showDiff instead.');
+      config.showDiff = value;
+    }
+  });
+
+  Assertion.addProperty = function (name, fn) {
+    util.addProperty(this.prototype, name, fn);
+  };
+
+  Assertion.addMethod = function (name, fn) {
+    util.addMethod(this.prototype, name, fn);
+  };
+
+  Assertion.addChainableMethod = function (name, fn, chainingBehavior) {
+    util.addChainableMethod(this.prototype, name, fn, chainingBehavior);
+  };
+
+  Assertion.overwriteProperty = function (name, fn) {
+    util.overwriteProperty(this.prototype, name, fn);
+  };
+
+  Assertion.overwriteMethod = function (name, fn) {
+    util.overwriteMethod(this.prototype, name, fn);
+  };
+
+  Assertion.overwriteChainableMethod = function (name, fn, chainingBehavior) {
+    util.overwriteChainableMethod(this.prototype, name, fn, chainingBehavior);
+  };
+
+  /**
+   * ### .assert(expression, message, negateMessage, expected, actual, showDiff)
+   *
+   * Executes an expression and check expectations. Throws AssertionError for reporting if test doesn't pass.
+   *
+   * @name assert
+   * @param {Philosophical} expression to be tested
+   * @param {String|Function} message or function that returns message to display if expression fails
+   * @param {String|Function} negatedMessage or function that returns negatedMessage to display if negated expression fails
+   * @param {Mixed} expected value (remember to check for negation)
+   * @param {Mixed} actual (optional) will default to `this.obj`
+   * @param {Boolean} showDiff (optional) when set to `true`, assert will display a diff in addition to the message if expression fails
+   * @api private
+   */
+
+  Assertion.prototype.assert = function (expr, msg, negateMsg, expected, _actual, showDiff) {
+    var ok = util.test(this, arguments);
+    if (false !== showDiff) showDiff = true;
+    if (undefined === expected && undefined === _actual) showDiff = false;
+    if (true !== config.showDiff) showDiff = false;
+
+    if (!ok) {
+      msg = util.getMessage(this, arguments);
+      var actual = util.getActual(this, arguments);
+      throw new AssertionError(msg, {
+          actual: actual
+        , expected: expected
+        , showDiff: showDiff
+      }, (config.includeStack) ? this.assert : flag(this, 'ssfi'));
+    }
+  };
+
+  /*!
+   * ### ._obj
+   *
+   * Quick reference to stored `actual` value for plugin developers.
+   *
+   * @api private
+   */
+
+  Object.defineProperty(Assertion.prototype, '_obj',
+    { get: function () {
+        return flag(this, 'object');
+      }
+    , set: function (val) {
+        flag(this, 'object', val);
+      }
+  });
+};
+
+},{"./config":4}],4:[function(require,module,exports){
+module.exports = {
+
+  /**
+   * ### config.includeStack
+   *
+   * User configurable property, influences whether stack trace
+   * is included in Assertion error message. Default of false
+   * suppresses stack trace in the error message.
+   *
+   *     chai.config.includeStack = true;  // enable stack on error
+   *
+   * @param {Boolean}
+   * @api public
+   */
+
+  includeStack: false,
+
+  /**
+   * ### config.showDiff
+   *
+   * User configurable property, influences whether or not
+   * the `showDiff` flag should be included in the thrown
+   * AssertionErrors. `false` will always be `false`; `true`
+   * will be true when the assertion has requested a diff
+   * be shown.
+   *
+   * @param {Boolean}
+   * @api public
+   */
+
+  showDiff: true,
+
+  /**
+   * ### config.truncateThreshold
+   *
+   * User configurable property, sets length threshold for actual and
+   * expected values in assertion errors. If this threshold is exceeded, for
+   * example for large data structures, the value is replaced with something
+   * like `[ Array(3) ]` or `{ Object (prop1, prop2) }`.
+   *
+   * Set it to zero if you want to disable truncating altogether.
+   *
+   * This is especially userful when doing assertions on arrays: having this
+   * set to a reasonable large value makes the failure messages readily
+   * inspectable.
+   *
+   *     chai.config.truncateThreshold = 0;  // disable truncating
+   *
+   * @param {Number}
+   * @api public
+   */
+
+  truncateThreshold: 40,
+
+  /**
+   * ### config.useProxy
+   *
+   * User configurable property, defines if chai will use a Proxy to throw
+   * an error when a non-existent property is read, which protects users
+   * from typos when using property-based assertions.
+   *
+   * Set it to false if you want to disable this feature.
+   *
+   *     chai.config.useProxy = false;  // disable use of Proxy
+   *
+   * This feature is automatically disabled regardless of this config value
+   * in environments that don't support proxies.
+   *
+   * @param {Boolean}
+   * @api public
+   */
+
+  useProxy: true,
+
+  /**
+   * ### config.proxyExcludedKeys
+   *
+   * User configurable property, defines which properties should be ignored
+   * instead of throwing an error if they do not exist on the assertion.
+   * This is only applied if the environment Chai is running in supports proxies and
+   * if the `useProxy` configuration setting is enabled.
+   * By default, `then` and `inspect` will not throw an error if they do not exist on the
+   * assertion object because the `.inspect` property is read by `util.inspect` (for example, when
+   * using `console.log` on the assertion object) and `.then` is necessary for promise type-checking.
+   *
+   *     // By default these keys will not throw an error if they do not exist on the assertion object
+   *     chai.config.proxyExcludedKeys = ['then', 'inspect'];
+   *
+   * @param {Array}
+   * @api public
+   */
+
+  proxyExcludedKeys: ['then', 'catch', 'inspect', 'toJSON']
+};
+
+},{}],5:[function(require,module,exports){
+/*!
+ * chai
+ * http://chaijs.com
+ * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+module.exports = function (chai, _) {
+  var Assertion = chai.Assertion
+    , AssertionError = chai.AssertionError
+    , flag = _.flag;
+
+  /**
+   * ### Language Chains
+   *
+   * The following are provided as chainable getters to improve the readability
+   * of your assertions.
+   *
+   * **Chains**
+   *
+   * - to
+   * - be
+   * - been
+   * - is
+   * - that
+   * - which
+   * - and
+   * - has
+   * - have
+   * - with
+   * - at
+   * - of
+   * - same
+   * - but
+   * - does
+   * - still
+   *
+   * @name language chains
+   * @namespace BDD
+   * @api public
+   */
+
+  [ 'to', 'be', 'been', 'is'
+  , 'and', 'has', 'have', 'with'
+  , 'that', 'which', 'at', 'of'
+  , 'same', 'but', 'does', 'still' ].forEach(function (chain) {
+    Assertion.addProperty(chain);
+  });
+
+  /**
+   * ### .not
+   *
+   * Negates all assertions that follow in the chain.
+   *
+   *     expect(function () {}).to.not.throw();
+   *     expect({a: 1}).to.not.have.property('b');
+   *     expect([1, 2]).to.be.an('array').that.does.not.include(3);
+   *
+   * Just because you can negate any assertion with `.not` doesn't mean you
+   * should. With great power comes great responsibility. It's often best to
+   * assert that the one expected output was produced, rather than asserting
+   * that one of countless unexpected outputs wasn't produced. See individual
+   * assertions for specific guidance.
+   *
+   *     expect(2).to.equal(2); // Recommended
+   *     expect(2).to.not.equal(1); // Not recommended
+   *
+   * @name not
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('not', function () {
+    flag(this, 'negate', true);
+  });
+
+  /**
+   * ### .deep
+   *
+   * Causes all `.equal`, `.include`, `.members`, `.keys`, and `.property`
+   * assertions that follow in the chain to use deep equality instead of strict
+   * (`===`) equality. See the `deep-eql` project page for info on the deep
+   * equality algorithm: https://github.com/chaijs/deep-eql.
+   *
+   *     // Target object deeply (but not strictly) equals `{a: 1}`
+   *     expect({a: 1}).to.deep.equal({a: 1});
+   *     expect({a: 1}).to.not.equal({a: 1});
+   *
+   *     // Target array deeply (but not strictly) includes `{a: 1}`
+   *     expect([{a: 1}]).to.deep.include({a: 1});
+   *     expect([{a: 1}]).to.not.include({a: 1});
+   *
+   *     // Target object deeply (but not strictly) includes `x: {a: 1}`
+   *     expect({x: {a: 1}}).to.deep.include({x: {a: 1}});
+   *     expect({x: {a: 1}}).to.not.include({x: {a: 1}});
+   *
+   *     // Target array deeply (but not strictly) has member `{a: 1}`
+   *     expect([{a: 1}]).to.have.deep.members([{a: 1}]);
+   *     expect([{a: 1}]).to.not.have.members([{a: 1}]);
+   *
+   *     // Target set deeply (but not strictly) has key `{a: 1}`
+   *     expect(new Set([{a: 1}])).to.have.deep.keys([{a: 1}]);
+   *     expect(new Set([{a: 1}])).to.not.have.keys([{a: 1}]);
+   *
+   *     // Target object deeply (but not strictly) has property `x: {a: 1}`
+   *     expect({x: {a: 1}}).to.have.deep.property('x', {a: 1});
+   *     expect({x: {a: 1}}).to.not.have.property('x', {a: 1});
+   *
+   * @name deep
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('deep', function () {
+    flag(this, 'deep', true);
+  });
+
+  /**
+   * ### .nested
+   *
+   * Enables dot- and bracket-notation in all `.property` and `.include`
+   * assertions that follow in the chain.
+   *
+   *     expect({a: {b: ['x', 'y']}}).to.have.nested.property('a.b[1]');
+   *     expect({a: {b: ['x', 'y']}}).to.nested.include({'a.b[1]': 'y'});
+   *
+   * If `.` or `[]` are part of an actual property name, they can be escaped by
+   * adding two backslashes before them.
+   *
+   *     expect({'.a': {'[b]': 'x'}}).to.have.nested.property('\\.a.\\[b\\]');
+   *     expect({'.a': {'[b]': 'x'}}).to.nested.include({'\\.a.\\[b\\]': 'x'});
+   *
+   * `.nested` cannot be combined with `.own`.
+   *
+   * @name nested
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('nested', function () {
+    flag(this, 'nested', true);
+  });
+
+  /**
+   * ### .own
+   *
+   * Causes all `.property` and `.include` assertions that follow in the chain
+   * to ignore inherited properties.
+   *
+   *     Object.prototype.b = 2;
+   *
+   *     expect({a: 1}).to.have.own.property('a');
+   *     expect({a: 1}).to.have.property('b');
+   *     expect({a: 1}).to.not.have.own.property('b');
+   *
+   *     expect({a: 1}).to.own.include({a: 1});
+   *     expect({a: 1}).to.include({b: 2}).but.not.own.include({b: 2});
+   *
+   * `.own` cannot be combined with `.nested`.
+   *
+   * @name own
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('own', function () {
+    flag(this, 'own', true);
+  });
+
+  /**
+   * ### .ordered
+   *
+   * Causes all `.members` assertions that follow in the chain to require that
+   * members be in the same order.
+   *
+   *     expect([1, 2]).to.have.ordered.members([1, 2])
+   *       .but.not.have.ordered.members([2, 1]);
+   *
+   * When `.include` and `.ordered` are combined, the ordering begins at the
+   * start of both arrays.
+   *
+   *     expect([1, 2, 3]).to.include.ordered.members([1, 2])
+   *       .but.not.include.ordered.members([2, 3]);
+   *
+   * @name ordered
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('ordered', function () {
+    flag(this, 'ordered', true);
+  });
+
+  /**
+   * ### .any
+   *
+   * Causes all `.keys` assertions that follow in the chain to only require that
+   * the target have at least one of the given keys. This is the opposite of
+   * `.all`, which requires that the target have all of the given keys.
+   *
+   *     expect({a: 1, b: 2}).to.not.have.any.keys('c', 'd');
+   *
+   * See the `.keys` doc for guidance on when to use `.any` or `.all`.
+   *
+   * @name any
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('any', function () {
+    flag(this, 'any', true);
+    flag(this, 'all', false);
+  });
+
+  /**
+   * ### .all
+   *
+   * Causes all `.keys` assertions that follow in the chain to require that the
+   * target have all of the given keys. This is the opposite of `.any`, which
+   * only requires that the target have at least one of the given keys.
+   *
+   *     expect({a: 1, b: 2}).to.have.all.keys('a', 'b');
+   *
+   * Note that `.all` is used by default when neither `.all` nor `.any` are
+   * added earlier in the chain. However, it's often best to add `.all` anyway
+   * because it improves readability.
+   *
+   * See the `.keys` doc for guidance on when to use `.any` or `.all`.
+   *
+   * @name all
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('all', function () {
+    flag(this, 'all', true);
+    flag(this, 'any', false);
+  });
+
+  /**
+   * ### .a(type[, msg])
+   *
+   * Asserts that the target's type is equal to the given string `type`. Types
+   * are case insensitive. See the `type-detect` project page for info on the
+   * type detection algorithm: https://github.com/chaijs/type-detect.
+   *
+   *     expect('foo').to.be.a('string');
+   *     expect({a: 1}).to.be.an('object');
+   *     expect(null).to.be.a('null');
+   *     expect(undefined).to.be.an('undefined');
+   *     expect(new Error).to.be.an('error');
+   *     expect(Promise.resolve()).to.be.a('promise');
+   *     expect(new Float32Array).to.be.a('float32array');
+   *     expect(Symbol()).to.be.a('symbol');
+   *
+   * `.a` supports objects that have a custom type set via `Symbol.toStringTag`.
+   *
+   *     var myObj = {
+   *       [Symbol.toStringTag]: 'myCustomType'
+   *     };
+   *
+   *     expect(myObj).to.be.a('myCustomType').but.not.an('object');
+   *
+   * It's often best to use `.a` to check a target's type before making more
+   * assertions on the same target. That way, you avoid unexpected behavior from
+   * any assertion that does different things based on the target's type.
+   *
+   *     expect([1, 2, 3]).to.be.an('array').that.includes(2);
+   *     expect([]).to.be.an('array').that.is.empty;
+   *
+   * Add `.not` earlier in the chain to negate `.a`. However, it's often best to
+   * assert that the target is the expected type, rather than asserting that it
+   * isn't one of many unexpected types.
+   *
+   *     expect('foo').to.be.a('string'); // Recommended
+   *     expect('foo').to.not.be.an('array'); // Not recommended
+   *
+   * `.a` accepts an optional `msg` argument which is a custom error message to
+   * show when the assertion fails. The message can also be given as the second
+   * argument to `expect`.
+   *
+   *     expect(1).to.be.a('string', 'nooo why fail??');
+   *     expect(1, 'nooo why fail??').to.be.a('string');
+   *
+   * `.a` can also be used as a language chain to improve the readability of
+   * your assertions.
+   *
+   *     expect({b: 2}).to.have.a.property('b');
+   *
+   * The alias `.an` can be used interchangeably with `.a`.
+   *
+   * @name a
+   * @alias an
+   * @param {String} type
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function an (type, msg) {
+    if (msg) flag(this, 'message', msg);
+    type = type.toLowerCase();
+    var obj = flag(this, 'object')
+      , article = ~[ 'a', 'e', 'i', 'o', 'u' ].indexOf(type.charAt(0)) ? 'an ' : 'a ';
+
+    this.assert(
+        type === _.type(obj).toLowerCase()
+      , 'expected #{this} to be ' + article + type
+      , 'expected #{this} not to be ' + article + type
+    );
+  }
+
+  Assertion.addChainableMethod('an', an);
+  Assertion.addChainableMethod('a', an);
+
+  /**
+   * ### .include(val[, msg])
+   *
+   * When the target is a string, `.include` asserts that the given string `val`
+   * is a substring of the target.
+   *
+   *     expect('foobar').to.include('foo');
+   *
+   * When the target is an array, `.include` asserts that the given `val` is a
+   * member of the target.
+   *
+   *     expect([1, 2, 3]).to.include(2);
+   *
+   * When the target is an object, `.include` asserts that the given object
+   * `val`'s properties are a subset of the target's properties.
+   *
+   *     expect({a: 1, b: 2, c: 3}).to.include({a: 1, b: 2});
+   *
+   * When the target is a Set or WeakSet, `.include` asserts that the given `val` is a
+   * member of the target. SameValueZero equality algorithm is used.
+   *
+   *     expect(new Set([1, 2])).to.include(2);
+   *
+   * When the target is a Map, `.include` asserts that the given `val` is one of
+   * the values of the target. SameValueZero equality algorithm is used.
+   *
+   *     expect(new Map([['a', 1], ['b', 2]])).to.include(2);
+   *
+   * Because `.include` does different things based on the target's type, it's
+   * important to check the target's type before using `.include`. See the `.a`
+   * doc for info on testing a target's type.
+   *
+   *     expect([1, 2, 3]).to.be.an('array').that.includes(2);
+   *
+   * By default, strict (`===`) equality is used to compare array members and
+   * object properties. Add `.deep` earlier in the chain to use deep equality
+   * instead (WeakSet targets are not supported). See the `deep-eql` project
+   * page for info on the deep equality algorithm: https://github.com/chaijs/deep-eql.
+   *
+   *     // Target array deeply (but not strictly) includes `{a: 1}`
+   *     expect([{a: 1}]).to.deep.include({a: 1});
+   *     expect([{a: 1}]).to.not.include({a: 1});
+   *
+   *     // Target object deeply (but not strictly) includes `x: {a: 1}`
+   *     expect({x: {a: 1}}).to.deep.include({x: {a: 1}});
+   *     expect({x: {a: 1}}).to.not.include({x: {a: 1}});
+   *
+   * By default, all of the target's properties are searched when working with
+   * objects. This includes properties that are inherited and/or non-enumerable.
+   * Add `.own` earlier in the chain to exclude the target's inherited
+   * properties from the search.
+   *
+   *     Object.prototype.b = 2;
+   *
+   *     expect({a: 1}).to.own.include({a: 1});
+   *     expect({a: 1}).to.include({b: 2}).but.not.own.include({b: 2});
+   *
+   * Note that a target object is always only searched for `val`'s own
+   * enumerable properties.
+   *
+   * `.deep` and `.own` can be combined.
+   *
+   *     expect({a: {b: 2}}).to.deep.own.include({a: {b: 2}});
+   *
+   * Add `.nested` earlier in the chain to enable dot- and bracket-notation when
+   * referencing nested properties.
+   *
+   *     expect({a: {b: ['x', 'y']}}).to.nested.include({'a.b[1]': 'y'});
+   *
+   * If `.` or `[]` are part of an actual property name, they can be escaped by
+   * adding two backslashes before them.
+   *
+   *     expect({'.a': {'[b]': 2}}).to.nested.include({'\\.a.\\[b\\]': 2});
+   *
+   * `.deep` and `.nested` can be combined.
+   *
+   *     expect({a: {b: [{c: 3}]}}).to.deep.nested.include({'a.b[0]': {c: 3}});
+   *
+   * `.own` and `.nested` cannot be combined.
+   *
+   * Add `.not` earlier in the chain to negate `.include`.
+   *
+   *     expect('foobar').to.not.include('taco');
+   *     expect([1, 2, 3]).to.not.include(4);
+   *
+   * However, it's dangerous to negate `.include` when the target is an object.
+   * The problem is that it creates uncertain expectations by asserting that the
+   * target object doesn't have all of `val`'s key/value pairs but may or may
+   * not have some of them. It's often best to identify the exact output that's
+   * expected, and then write an assertion that only accepts that exact output.
+   *
+   * When the target object isn't even expected to have `val`'s keys, it's
+   * often best to assert exactly that.
+   *
+   *     expect({c: 3}).to.not.have.any.keys('a', 'b'); // Recommended
+   *     expect({c: 3}).to.not.include({a: 1, b: 2}); // Not recommended
+   *
+   * When the target object is expected to have `val`'s keys, it's often best to
+   * assert that each of the properties has its expected value, rather than
+   * asserting that each property doesn't have one of many unexpected values.
+   *
+   *     expect({a: 3, b: 4}).to.include({a: 3, b: 4}); // Recommended
+   *     expect({a: 3, b: 4}).to.not.include({a: 1, b: 2}); // Not recommended
+   *
+   * `.include` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`.
+   *
+   *     expect([1, 2, 3]).to.include(4, 'nooo why fail??');
+   *     expect([1, 2, 3], 'nooo why fail??').to.include(4);
+   *
+   * `.include` can also be used as a language chain, causing all `.members` and
+   * `.keys` assertions that follow in the chain to require the target to be a
+   * superset of the expected set, rather than an identical set. Note that
+   * `.members` ignores duplicates in the subset when `.include` is added.
+   *
+   *     // Target object's keys are a superset of ['a', 'b'] but not identical
+   *     expect({a: 1, b: 2, c: 3}).to.include.all.keys('a', 'b');
+   *     expect({a: 1, b: 2, c: 3}).to.not.have.all.keys('a', 'b');
+   *
+   *     // Target array is a superset of [1, 2] but not identical
+   *     expect([1, 2, 3]).to.include.members([1, 2]);
+   *     expect([1, 2, 3]).to.not.have.members([1, 2]);
+   *
+   *     // Duplicates in the subset are ignored
+   *     expect([1, 2, 3]).to.include.members([1, 2, 2, 2]);
+   *
+   * Note that adding `.any` earlier in the chain causes the `.keys` assertion
+   * to ignore `.include`.
+   *
+   *     // Both assertions are identical
+   *     expect({a: 1}).to.include.any.keys('a', 'b');
+   *     expect({a: 1}).to.have.any.keys('a', 'b');
+   *
+   * The aliases `.includes`, `.contain`, and `.contains` can be used
+   * interchangeably with `.include`.
+   *
+   * @name include
+   * @alias contain
+   * @alias includes
+   * @alias contains
+   * @param {Mixed} val
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function SameValueZero(a, b) {
+    return (_.isNaN(a) && _.isNaN(b)) || a === b;
+  }
+
+  function includeChainingBehavior () {
+    flag(this, 'contains', true);
+  }
+
+  function include (val, msg) {
+    if (msg) flag(this, 'message', msg);
+
+    var obj = flag(this, 'object')
+      , objType = _.type(obj).toLowerCase()
+      , flagMsg = flag(this, 'message')
+      , negate = flag(this, 'negate')
+      , ssfi = flag(this, 'ssfi')
+      , isDeep = flag(this, 'deep')
+      , descriptor = isDeep ? 'deep ' : '';
+
+    flagMsg = flagMsg ? flagMsg + ': ' : '';
+
+    var included = false;
+
+    switch (objType) {
+      case 'string':
+        included = obj.indexOf(val) !== -1;
+        break;
+
+      case 'weakset':
+        if (isDeep) {
+          throw new AssertionError(
+            flagMsg + 'unable to use .deep.include with WeakSet',
+            undefined,
+            ssfi
+          );
+        }
+
+        included = obj.has(val);
+        break;
+
+      case 'map':
+        var isEql = isDeep ? _.eql : SameValueZero;
+        obj.forEach(function (item) {
+          included = included || isEql(item, val);
+        });
+        break;
+
+      case 'set':
+        if (isDeep) {
+          obj.forEach(function (item) {
+            included = included || _.eql(item, val);
+          });
+        } else {
+          included = obj.has(val);
+        }
+        break;
+
+      case 'array':
+        if (isDeep) {
+          included = obj.some(function (item) {
+            return _.eql(item, val);
+          })
+        } else {
+          included = obj.indexOf(val) !== -1;
+        }
+        break;
+
+      default:
+        // This block is for asserting a subset of properties in an object.
+        // `_.expectTypes` isn't used here because `.include` should work with
+        // objects with a custom `@@toStringTag`.
+        if (val !== Object(val)) {
+          throw new AssertionError(
+            flagMsg + 'object tested must be an array, a map, an object,'
+              + ' a set, a string, or a weakset, but ' + objType + ' given',
+            undefined,
+            ssfi
+          );
+        }
+
+        var props = Object.keys(val)
+          , firstErr = null
+          , numErrs = 0;
+
+        props.forEach(function (prop) {
+          var propAssertion = new Assertion(obj);
+          _.transferFlags(this, propAssertion, true);
+          flag(propAssertion, 'lockSsfi', true);
+
+          if (!negate || props.length === 1) {
+            propAssertion.property(prop, val[prop]);
+            return;
+          }
+
+          try {
+            propAssertion.property(prop, val[prop]);
+          } catch (err) {
+            if (!_.checkError.compatibleConstructor(err, AssertionError)) {
+              throw err;
+            }
+            if (firstErr === null) firstErr = err;
+            numErrs++;
+          }
+        }, this);
+
+        // When validating .not.include with multiple properties, we only want
+        // to throw an assertion error if all of the properties are included,
+        // in which case we throw the first property assertion error that we
+        // encountered.
+        if (negate && props.length > 1 && numErrs === props.length) {
+          throw firstErr;
+        }
+        return;
+    }
+
+    // Assert inclusion in collection or substring in a string.
+    this.assert(
+      included
+      , 'expected #{this} to ' + descriptor + 'include ' + _.inspect(val)
+      , 'expected #{this} to not ' + descriptor + 'include ' + _.inspect(val));
+  }
+
+  Assertion.addChainableMethod('include', include, includeChainingBehavior);
+  Assertion.addChainableMethod('contain', include, includeChainingBehavior);
+  Assertion.addChainableMethod('contains', include, includeChainingBehavior);
+  Assertion.addChainableMethod('includes', include, includeChainingBehavior);
+
+  /**
+   * ### .ok
+   *
+   * Asserts that the target is a truthy value (considered `true` in boolean context).
+   * However, it's often best to assert that the target is strictly (`===`) or
+   * deeply equal to its expected value.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.be.ok; // Not recommended
+   *
+   *     expect(true).to.be.true; // Recommended
+   *     expect(true).to.be.ok; // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.ok`.
+   *
+   *     expect(0).to.equal(0); // Recommended
+   *     expect(0).to.not.be.ok; // Not recommended
+   *
+   *     expect(false).to.be.false; // Recommended
+   *     expect(false).to.not.be.ok; // Not recommended
+   *
+   *     expect(null).to.be.null; // Recommended
+   *     expect(null).to.not.be.ok; // Not recommended
+   *
+   *     expect(undefined).to.be.undefined; // Recommended
+   *     expect(undefined).to.not.be.ok; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect(false, 'nooo why fail??').to.be.ok;
+   *
+   * @name ok
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('ok', function () {
+    this.assert(
+        flag(this, 'object')
+      , 'expected #{this} to be truthy'
+      , 'expected #{this} to be falsy');
+  });
+
+  /**
+   * ### .true
+   *
+   * Asserts that the target is strictly (`===`) equal to `true`.
+   *
+   *     expect(true).to.be.true;
+   *
+   * Add `.not` earlier in the chain to negate `.true`. However, it's often best
+   * to assert that the target is equal to its expected value, rather than not
+   * equal to `true`.
+   *
+   *     expect(false).to.be.false; // Recommended
+   *     expect(false).to.not.be.true; // Not recommended
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.not.be.true; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect(false, 'nooo why fail??').to.be.true;
+   *
+   * @name true
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('true', function () {
+    this.assert(
+        true === flag(this, 'object')
+      , 'expected #{this} to be true'
+      , 'expected #{this} to be false'
+      , flag(this, 'negate') ? false : true
+    );
+  });
+
+  /**
+   * ### .false
+   *
+   * Asserts that the target is strictly (`===`) equal to `false`.
+   *
+   *     expect(false).to.be.false;
+   *
+   * Add `.not` earlier in the chain to negate `.false`. However, it's often
+   * best to assert that the target is equal to its expected value, rather than
+   * not equal to `false`.
+   *
+   *     expect(true).to.be.true; // Recommended
+   *     expect(true).to.not.be.false; // Not recommended
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.not.be.false; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect(true, 'nooo why fail??').to.be.false;
+   *
+   * @name false
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('false', function () {
+    this.assert(
+        false === flag(this, 'object')
+      , 'expected #{this} to be false'
+      , 'expected #{this} to be true'
+      , flag(this, 'negate') ? true : false
+    );
+  });
+
+  /**
+   * ### .null
+   *
+   * Asserts that the target is strictly (`===`) equal to `null`.
+   *
+   *     expect(null).to.be.null;
+   *
+   * Add `.not` earlier in the chain to negate `.null`. However, it's often best
+   * to assert that the target is equal to its expected value, rather than not
+   * equal to `null`.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.not.be.null; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect(42, 'nooo why fail??').to.be.null;
+   *
+   * @name null
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('null', function () {
+    this.assert(
+        null === flag(this, 'object')
+      , 'expected #{this} to be null'
+      , 'expected #{this} not to be null'
+    );
+  });
+
+  /**
+   * ### .undefined
+   *
+   * Asserts that the target is strictly (`===`) equal to `undefined`.
+   *
+   *     expect(undefined).to.be.undefined;
+   *
+   * Add `.not` earlier in the chain to negate `.undefined`. However, it's often
+   * best to assert that the target is equal to its expected value, rather than
+   * not equal to `undefined`.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.not.be.undefined; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect(42, 'nooo why fail??').to.be.undefined;
+   *
+   * @name undefined
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('undefined', function () {
+    this.assert(
+        undefined === flag(this, 'object')
+      , 'expected #{this} to be undefined'
+      , 'expected #{this} not to be undefined'
+    );
+  });
+
+  /**
+   * ### .NaN
+   *
+   * Asserts that the target is exactly `NaN`.
+   *
+   *     expect(NaN).to.be.NaN;
+   *
+   * Add `.not` earlier in the chain to negate `.NaN`. However, it's often best
+   * to assert that the target is equal to its expected value, rather than not
+   * equal to `NaN`.
+   *
+   *     expect('foo').to.equal('foo'); // Recommended
+   *     expect('foo').to.not.be.NaN; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect(42, 'nooo why fail??').to.be.NaN;
+   *
+   * @name NaN
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('NaN', function () {
+    this.assert(
+        _.isNaN(flag(this, 'object'))
+        , 'expected #{this} to be NaN'
+        , 'expected #{this} not to be NaN'
+    );
+  });
+
+  /**
+   * ### .exist
+   *
+   * Asserts that the target is not strictly (`===`) equal to either `null` or
+   * `undefined`. However, it's often best to assert that the target is equal to
+   * its expected value.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.exist; // Not recommended
+   *
+   *     expect(0).to.equal(0); // Recommended
+   *     expect(0).to.exist; // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.exist`.
+   *
+   *     expect(null).to.be.null; // Recommended
+   *     expect(null).to.not.exist; // Not recommended
+   *
+   *     expect(undefined).to.be.undefined; // Recommended
+   *     expect(undefined).to.not.exist; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect(null, 'nooo why fail??').to.exist;
+   *
+   * @name exist
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('exist', function () {
+    var val = flag(this, 'object');
+    this.assert(
+        val !== null && val !== undefined
+      , 'expected #{this} to exist'
+      , 'expected #{this} to not exist'
+    );
+  });
+
+  /**
+   * ### .empty
+   *
+   * When the target is a string or array, `.empty` asserts that the target's
+   * `length` property is strictly (`===`) equal to `0`.
+   *
+   *     expect([]).to.be.empty;
+   *     expect('').to.be.empty;
+   *
+   * When the target is a map or set, `.empty` asserts that the target's `size`
+   * property is strictly equal to `0`.
+   *
+   *     expect(new Set()).to.be.empty;
+   *     expect(new Map()).to.be.empty;
+   *
+   * When the target is a non-function object, `.empty` asserts that the target
+   * doesn't have any own enumerable properties. Properties with Symbol-based
+   * keys are excluded from the count.
+   *
+   *     expect({}).to.be.empty;
+   *
+   * Because `.empty` does different things based on the target's type, it's
+   * important to check the target's type before using `.empty`. See the `.a`
+   * doc for info on testing a target's type.
+   *
+   *     expect([]).to.be.an('array').that.is.empty;
+   *
+   * Add `.not` earlier in the chain to negate `.empty`. However, it's often
+   * best to assert that the target contains its expected number of values,
+   * rather than asserting that it's not empty.
+   *
+   *     expect([1, 2, 3]).to.have.lengthOf(3); // Recommended
+   *     expect([1, 2, 3]).to.not.be.empty; // Not recommended
+   *
+   *     expect(new Set([1, 2, 3])).to.have.property('size', 3); // Recommended
+   *     expect(new Set([1, 2, 3])).to.not.be.empty; // Not recommended
+   *
+   *     expect(Object.keys({a: 1})).to.have.lengthOf(1); // Recommended
+   *     expect({a: 1}).to.not.be.empty; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect([1, 2, 3], 'nooo why fail??').to.be.empty;
+   *
+   * @name empty
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('empty', function () {
+    var val = flag(this, 'object')
+      , ssfi = flag(this, 'ssfi')
+      , flagMsg = flag(this, 'message')
+      , itemsCount;
+
+    flagMsg = flagMsg ? flagMsg + ': ' : '';
+
+    switch (_.type(val).toLowerCase()) {
+      case 'array':
+      case 'string':
+        itemsCount = val.length;
+        break;
+      case 'map':
+      case 'set':
+        itemsCount = val.size;
+        break;
+      case 'weakmap':
+      case 'weakset':
+        throw new AssertionError(
+          flagMsg + '.empty was passed a weak collection',
+          undefined,
+          ssfi
+        );
+      case 'function':
+        var msg = flagMsg + '.empty was passed a function ' + _.getName(val);
+        throw new AssertionError(msg.trim(), undefined, ssfi);
+      default:
+        if (val !== Object(val)) {
+          throw new AssertionError(
+            flagMsg + '.empty was passed non-string primitive ' + _.inspect(val),
+            undefined,
+            ssfi
+          );
+        }
+        itemsCount = Object.keys(val).length;
+    }
+
+    this.assert(
+        0 === itemsCount
+      , 'expected #{this} to be empty'
+      , 'expected #{this} not to be empty'
+    );
+  });
+
+  /**
+   * ### .arguments
+   *
+   * Asserts that the target is an `arguments` object.
+   *
+   *     function test () {
+   *       expect(arguments).to.be.arguments;
+   *     }
+   *
+   *     test();
+   *
+   * Add `.not` earlier in the chain to negate `.arguments`. However, it's often
+   * best to assert which type the target is expected to be, rather than
+   * asserting that its not an `arguments` object.
+   *
+   *     expect('foo').to.be.a('string'); // Recommended
+   *     expect('foo').to.not.be.arguments; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect({}, 'nooo why fail??').to.be.arguments;
+   *
+   * The alias `.Arguments` can be used interchangeably with `.arguments`.
+   *
+   * @name arguments
+   * @alias Arguments
+   * @namespace BDD
+   * @api public
+   */
+
+  function checkArguments () {
+    var obj = flag(this, 'object')
+      , type = _.type(obj);
+    this.assert(
+        'Arguments' === type
+      , 'expected #{this} to be arguments but got ' + type
+      , 'expected #{this} to not be arguments'
+    );
+  }
+
+  Assertion.addProperty('arguments', checkArguments);
+  Assertion.addProperty('Arguments', checkArguments);
+
+  /**
+   * ### .equal(val[, msg])
+   *
+   * Asserts that the target is strictly (`===`) equal to the given `val`.
+   *
+   *     expect(1).to.equal(1);
+   *     expect('foo').to.equal('foo');
+   *
+   * Add `.deep` earlier in the chain to use deep equality instead. See the
+   * `deep-eql` project page for info on the deep equality algorithm:
+   * https://github.com/chaijs/deep-eql.
+   *
+   *     // Target object deeply (but not strictly) equals `{a: 1}`
+   *     expect({a: 1}).to.deep.equal({a: 1});
+   *     expect({a: 1}).to.not.equal({a: 1});
+   *
+   *     // Target array deeply (but not strictly) equals `[1, 2]`
+   *     expect([1, 2]).to.deep.equal([1, 2]);
+   *     expect([1, 2]).to.not.equal([1, 2]);
+   *
+   * Add `.not` earlier in the chain to negate `.equal`. However, it's often
+   * best to assert that the target is equal to its expected value, rather than
+   * not equal to one of countless unexpected values.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.not.equal(2); // Not recommended
+   *
+   * `.equal` accepts an optional `msg` argument which is a custom error message
+   * to show when the assertion fails. The message can also be given as the
+   * second argument to `expect`.
+   *
+   *     expect(1).to.equal(2, 'nooo why fail??');
+   *     expect(1, 'nooo why fail??').to.equal(2);
+   *
+   * The aliases `.equals` and `eq` can be used interchangeably with `.equal`.
+   *
+   * @name equal
+   * @alias equals
+   * @alias eq
+   * @param {Mixed} val
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertEqual (val, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object');
+    if (flag(this, 'deep')) {
+      var prevLockSsfi = flag(this, 'lockSsfi');
+      flag(this, 'lockSsfi', true);
+      this.eql(val);
+      flag(this, 'lockSsfi', prevLockSsfi);
+    } else {
+      this.assert(
+          val === obj
+        , 'expected #{this} to equal #{exp}'
+        , 'expected #{this} to not equal #{exp}'
+        , val
+        , this._obj
+        , true
+      );
+    }
+  }
+
+  Assertion.addMethod('equal', assertEqual);
+  Assertion.addMethod('equals', assertEqual);
+  Assertion.addMethod('eq', assertEqual);
+
+  /**
+   * ### .eql(obj[, msg])
+   *
+   * Asserts that the target is deeply equal to the given `obj`. See the
+   * `deep-eql` project page for info on the deep equality algorithm:
+   * https://github.com/chaijs/deep-eql.
+   *
+   *     // Target object is deeply (but not strictly) equal to {a: 1}
+   *     expect({a: 1}).to.eql({a: 1}).but.not.equal({a: 1});
+   *
+   *     // Target array is deeply (but not strictly) equal to [1, 2]
+   *     expect([1, 2]).to.eql([1, 2]).but.not.equal([1, 2]);
+   *
+   * Add `.not` earlier in the chain to negate `.eql`. However, it's often best
+   * to assert that the target is deeply equal to its expected value, rather
+   * than not deeply equal to one of countless unexpected values.
+   *
+   *     expect({a: 1}).to.eql({a: 1}); // Recommended
+   *     expect({a: 1}).to.not.eql({b: 2}); // Not recommended
+   *
+   * `.eql` accepts an optional `msg` argument which is a custom error message
+   * to show when the assertion fails. The message can also be given as the
+   * second argument to `expect`.
+   *
+   *     expect({a: 1}).to.eql({b: 2}, 'nooo why fail??');
+   *     expect({a: 1}, 'nooo why fail??').to.eql({b: 2});
+   *
+   * The alias `.eqls` can be used interchangeably with `.eql`.
+   *
+   * The `.deep.equal` assertion is almost identical to `.eql` but with one
+   * difference: `.deep.equal` causes deep equality comparisons to also be used
+   * for any other assertions that follow in the chain.
+   *
+   * @name eql
+   * @alias eqls
+   * @param {Mixed} obj
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertEql(obj, msg) {
+    if (msg) flag(this, 'message', msg);
+    this.assert(
+        _.eql(obj, flag(this, 'object'))
+      , 'expected #{this} to deeply equal #{exp}'
+      , 'expected #{this} to not deeply equal #{exp}'
+      , obj
+      , this._obj
+      , true
+    );
+  }
+
+  Assertion.addMethod('eql', assertEql);
+  Assertion.addMethod('eqls', assertEql);
+
+  /**
+   * ### .above(n[, msg])
+   *
+   * Asserts that the target is a number or a date greater than the given number or date `n` respectively.
+   * However, it's often best to assert that the target is equal to its expected
+   * value.
+   *
+   *     expect(2).to.equal(2); // Recommended
+   *     expect(2).to.be.above(1); // Not recommended
+   *
+   * Add `.lengthOf` earlier in the chain to assert that the target's `length`
+   * or `size` is greater than the given number `n`.
+   *
+   *     expect('foo').to.have.lengthOf(3); // Recommended
+   *     expect('foo').to.have.lengthOf.above(2); // Not recommended
+   *
+   *     expect([1, 2, 3]).to.have.lengthOf(3); // Recommended
+   *     expect([1, 2, 3]).to.have.lengthOf.above(2); // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.above`.
+   *
+   *     expect(2).to.equal(2); // Recommended
+   *     expect(1).to.not.be.above(2); // Not recommended
+   *
+   * `.above` accepts an optional `msg` argument which is a custom error message
+   * to show when the assertion fails. The message can also be given as the
+   * second argument to `expect`.
+   *
+   *     expect(1).to.be.above(2, 'nooo why fail??');
+   *     expect(1, 'nooo why fail??').to.be.above(2);
+   *
+   * The aliases `.gt` and `.greaterThan` can be used interchangeably with
+   * `.above`.
+   *
+   * @name above
+   * @alias gt
+   * @alias greaterThan
+   * @param {Number} n
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertAbove (n, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , doLength = flag(this, 'doLength')
+      , flagMsg = flag(this, 'message')
+      , msgPrefix = ((flagMsg) ? flagMsg + ': ' : '')
+      , ssfi = flag(this, 'ssfi')
+      , objType = _.type(obj).toLowerCase()
+      , nType = _.type(n).toLowerCase()
+      , errorMessage
+      , shouldThrow = true;
+
+    if (doLength && objType !== 'map' && objType !== 'set') {
+      new Assertion(obj, flagMsg, ssfi, true).to.have.property('length');
+    }
+
+    if (!doLength && (objType === 'date' && nType !== 'date')) {
+      errorMessage = msgPrefix + 'the argument to above must be a date';
+    } else if (nType !== 'number' && (doLength || objType === 'number')) {
+      errorMessage = msgPrefix + 'the argument to above must be a number';
+    } else if (!doLength && (objType !== 'date' && objType !== 'number')) {
+      var printObj = (objType === 'string') ? "'" + obj + "'" : obj;
+      errorMessage = msgPrefix + 'expected ' + printObj + ' to be a number or a date';
+    } else {
+      shouldThrow = false;
+    }
+
+    if (shouldThrow) {
+      throw new AssertionError(errorMessage, undefined, ssfi);
+    }
+
+    if (doLength) {
+      var descriptor = 'length'
+        , itemsCount;
+      if (objType === 'map' || objType === 'set') {
+        descriptor = 'size';
+        itemsCount = obj.size;
+      } else {
+        itemsCount = obj.length;
+      }
+      this.assert(
+          itemsCount > n
+        , 'expected #{this} to have a ' + descriptor + ' above #{exp} but got #{act}'
+        , 'expected #{this} to not have a ' + descriptor + ' above #{exp}'
+        , n
+        , itemsCount
+      );
+    } else {
+      this.assert(
+          obj > n
+        , 'expected #{this} to be above #{exp}'
+        , 'expected #{this} to be at most #{exp}'
+        , n
+      );
+    }
+  }
+
+  Assertion.addMethod('above', assertAbove);
+  Assertion.addMethod('gt', assertAbove);
+  Assertion.addMethod('greaterThan', assertAbove);
+
+  /**
+   * ### .least(n[, msg])
+   *
+   * Asserts that the target is a number or a date greater than or equal to the given
+   * number or date `n` respectively. However, it's often best to assert that the target is equal to
+   * its expected value.
+   *
+   *     expect(2).to.equal(2); // Recommended
+   *     expect(2).to.be.at.least(1); // Not recommended
+   *     expect(2).to.be.at.least(2); // Not recommended
+   *
+   * Add `.lengthOf` earlier in the chain to assert that the target's `length`
+   * or `size` is greater than or equal to the given number `n`.
+   *
+   *     expect('foo').to.have.lengthOf(3); // Recommended
+   *     expect('foo').to.have.lengthOf.at.least(2); // Not recommended
+   *
+   *     expect([1, 2, 3]).to.have.lengthOf(3); // Recommended
+   *     expect([1, 2, 3]).to.have.lengthOf.at.least(2); // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.least`.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.not.be.at.least(2); // Not recommended
+   *
+   * `.least` accepts an optional `msg` argument which is a custom error message
+   * to show when the assertion fails. The message can also be given as the
+   * second argument to `expect`.
+   *
+   *     expect(1).to.be.at.least(2, 'nooo why fail??');
+   *     expect(1, 'nooo why fail??').to.be.at.least(2);
+   *
+   * The alias `.gte` can be used interchangeably with `.least`.
+   *
+   * @name least
+   * @alias gte
+   * @param {Number} n
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertLeast (n, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , doLength = flag(this, 'doLength')
+      , flagMsg = flag(this, 'message')
+      , msgPrefix = ((flagMsg) ? flagMsg + ': ' : '')
+      , ssfi = flag(this, 'ssfi')
+      , objType = _.type(obj).toLowerCase()
+      , nType = _.type(n).toLowerCase()
+      , errorMessage
+      , shouldThrow = true;
+
+    if (doLength && objType !== 'map' && objType !== 'set') {
+      new Assertion(obj, flagMsg, ssfi, true).to.have.property('length');
+    }
+
+    if (!doLength && (objType === 'date' && nType !== 'date')) {
+      errorMessage = msgPrefix + 'the argument to least must be a date';
+    } else if (nType !== 'number' && (doLength || objType === 'number')) {
+      errorMessage = msgPrefix + 'the argument to least must be a number';
+    } else if (!doLength && (objType !== 'date' && objType !== 'number')) {
+      var printObj = (objType === 'string') ? "'" + obj + "'" : obj;
+      errorMessage = msgPrefix + 'expected ' + printObj + ' to be a number or a date';
+    } else {
+      shouldThrow = false;
+    }
+
+    if (shouldThrow) {
+      throw new AssertionError(errorMessage, undefined, ssfi);
+    }
+
+    if (doLength) {
+      var descriptor = 'length'
+        , itemsCount;
+      if (objType === 'map' || objType === 'set') {
+        descriptor = 'size';
+        itemsCount = obj.size;
+      } else {
+        itemsCount = obj.length;
+      }
+      this.assert(
+          itemsCount >= n
+        , 'expected #{this} to have a ' + descriptor + ' at least #{exp} but got #{act}'
+        , 'expected #{this} to have a ' + descriptor + ' below #{exp}'
+        , n
+        , itemsCount
+      );
+    } else {
+      this.assert(
+          obj >= n
+        , 'expected #{this} to be at least #{exp}'
+        , 'expected #{this} to be below #{exp}'
+        , n
+      );
+    }
+  }
+
+  Assertion.addMethod('least', assertLeast);
+  Assertion.addMethod('gte', assertLeast);
+
+  /**
+   * ### .below(n[, msg])
+   *
+   * Asserts that the target is a number or a date less than the given number or date `n` respectively.
+   * However, it's often best to assert that the target is equal to its expected
+   * value.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.be.below(2); // Not recommended
+   *
+   * Add `.lengthOf` earlier in the chain to assert that the target's `length`
+   * or `size` is less than the given number `n`.
+   *
+   *     expect('foo').to.have.lengthOf(3); // Recommended
+   *     expect('foo').to.have.lengthOf.below(4); // Not recommended
+   *
+   *     expect([1, 2, 3]).to.have.length(3); // Recommended
+   *     expect([1, 2, 3]).to.have.lengthOf.below(4); // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.below`.
+   *
+   *     expect(2).to.equal(2); // Recommended
+   *     expect(2).to.not.be.below(1); // Not recommended
+   *
+   * `.below` accepts an optional `msg` argument which is a custom error message
+   * to show when the assertion fails. The message can also be given as the
+   * second argument to `expect`.
+   *
+   *     expect(2).to.be.below(1, 'nooo why fail??');
+   *     expect(2, 'nooo why fail??').to.be.below(1);
+   *
+   * The aliases `.lt` and `.lessThan` can be used interchangeably with
+   * `.below`.
+   *
+   * @name below
+   * @alias lt
+   * @alias lessThan
+   * @param {Number} n
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertBelow (n, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , doLength = flag(this, 'doLength')
+      , flagMsg = flag(this, 'message')
+      , msgPrefix = ((flagMsg) ? flagMsg + ': ' : '')
+      , ssfi = flag(this, 'ssfi')
+      , objType = _.type(obj).toLowerCase()
+      , nType = _.type(n).toLowerCase()
+      , errorMessage
+      , shouldThrow = true;
+
+    if (doLength && objType !== 'map' && objType !== 'set') {
+      new Assertion(obj, flagMsg, ssfi, true).to.have.property('length');
+    }
+
+    if (!doLength && (objType === 'date' && nType !== 'date')) {
+      errorMessage = msgPrefix + 'the argument to below must be a date';
+    } else if (nType !== 'number' && (doLength || objType === 'number')) {
+      errorMessage = msgPrefix + 'the argument to below must be a number';
+    } else if (!doLength && (objType !== 'date' && objType !== 'number')) {
+      var printObj = (objType === 'string') ? "'" + obj + "'" : obj;
+      errorMessage = msgPrefix + 'expected ' + printObj + ' to be a number or a date';
+    } else {
+      shouldThrow = false;
+    }
+
+    if (shouldThrow) {
+      throw new AssertionError(errorMessage, undefined, ssfi);
+    }
+
+    if (doLength) {
+      var descriptor = 'length'
+        , itemsCount;
+      if (objType === 'map' || objType === 'set') {
+        descriptor = 'size';
+        itemsCount = obj.size;
+      } else {
+        itemsCount = obj.length;
+      }
+      this.assert(
+          itemsCount < n
+        , 'expected #{this} to have a ' + descriptor + ' below #{exp} but got #{act}'
+        , 'expected #{this} to not have a ' + descriptor + ' below #{exp}'
+        , n
+        , itemsCount
+      );
+    } else {
+      this.assert(
+          obj < n
+        , 'expected #{this} to be below #{exp}'
+        , 'expected #{this} to be at least #{exp}'
+        , n
+      );
+    }
+  }
+
+  Assertion.addMethod('below', assertBelow);
+  Assertion.addMethod('lt', assertBelow);
+  Assertion.addMethod('lessThan', assertBelow);
+
+  /**
+   * ### .most(n[, msg])
+   *
+   * Asserts that the target is a number or a date less than or equal to the given number
+   * or date `n` respectively. However, it's often best to assert that the target is equal to its
+   * expected value.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.be.at.most(2); // Not recommended
+   *     expect(1).to.be.at.most(1); // Not recommended
+   *
+   * Add `.lengthOf` earlier in the chain to assert that the target's `length`
+   * or `size` is less than or equal to the given number `n`.
+   *
+   *     expect('foo').to.have.lengthOf(3); // Recommended
+   *     expect('foo').to.have.lengthOf.at.most(4); // Not recommended
+   *
+   *     expect([1, 2, 3]).to.have.lengthOf(3); // Recommended
+   *     expect([1, 2, 3]).to.have.lengthOf.at.most(4); // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.most`.
+   *
+   *     expect(2).to.equal(2); // Recommended
+   *     expect(2).to.not.be.at.most(1); // Not recommended
+   *
+   * `.most` accepts an optional `msg` argument which is a custom error message
+   * to show when the assertion fails. The message can also be given as the
+   * second argument to `expect`.
+   *
+   *     expect(2).to.be.at.most(1, 'nooo why fail??');
+   *     expect(2, 'nooo why fail??').to.be.at.most(1);
+   *
+   * The alias `.lte` can be used interchangeably with `.most`.
+   *
+   * @name most
+   * @alias lte
+   * @param {Number} n
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertMost (n, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , doLength = flag(this, 'doLength')
+      , flagMsg = flag(this, 'message')
+      , msgPrefix = ((flagMsg) ? flagMsg + ': ' : '')
+      , ssfi = flag(this, 'ssfi')
+      , objType = _.type(obj).toLowerCase()
+      , nType = _.type(n).toLowerCase()
+      , errorMessage
+      , shouldThrow = true;
+
+    if (doLength && objType !== 'map' && objType !== 'set') {
+      new Assertion(obj, flagMsg, ssfi, true).to.have.property('length');
+    }
+
+    if (!doLength && (objType === 'date' && nType !== 'date')) {
+      errorMessage = msgPrefix + 'the argument to most must be a date';
+    } else if (nType !== 'number' && (doLength || objType === 'number')) {
+      errorMessage = msgPrefix + 'the argument to most must be a number';
+    } else if (!doLength && (objType !== 'date' && objType !== 'number')) {
+      var printObj = (objType === 'string') ? "'" + obj + "'" : obj;
+      errorMessage = msgPrefix + 'expected ' + printObj + ' to be a number or a date';
+    } else {
+      shouldThrow = false;
+    }
+
+    if (shouldThrow) {
+      throw new AssertionError(errorMessage, undefined, ssfi);
+    }
+
+    if (doLength) {
+      var descriptor = 'length'
+        , itemsCount;
+      if (objType === 'map' || objType === 'set') {
+        descriptor = 'size';
+        itemsCount = obj.size;
+      } else {
+        itemsCount = obj.length;
+      }
+      this.assert(
+          itemsCount <= n
+        , 'expected #{this} to have a ' + descriptor + ' at most #{exp} but got #{act}'
+        , 'expected #{this} to have a ' + descriptor + ' above #{exp}'
+        , n
+        , itemsCount
+      );
+    } else {
+      this.assert(
+          obj <= n
+        , 'expected #{this} to be at most #{exp}'
+        , 'expected #{this} to be above #{exp}'
+        , n
+      );
+    }
+  }
+
+  Assertion.addMethod('most', assertMost);
+  Assertion.addMethod('lte', assertMost);
+
+  /**
+   * ### .within(start, finish[, msg])
+   *
+   * Asserts that the target is a number or a date greater than or equal to the given
+   * number or date `start`, and less than or equal to the given number or date `finish` respectively.
+   * However, it's often best to assert that the target is equal to its expected
+   * value.
+   *
+   *     expect(2).to.equal(2); // Recommended
+   *     expect(2).to.be.within(1, 3); // Not recommended
+   *     expect(2).to.be.within(2, 3); // Not recommended
+   *     expect(2).to.be.within(1, 2); // Not recommended
+   *
+   * Add `.lengthOf` earlier in the chain to assert that the target's `length`
+   * or `size` is greater than or equal to the given number `start`, and less
+   * than or equal to the given number `finish`.
+   *
+   *     expect('foo').to.have.lengthOf(3); // Recommended
+   *     expect('foo').to.have.lengthOf.within(2, 4); // Not recommended
+   *
+   *     expect([1, 2, 3]).to.have.lengthOf(3); // Recommended
+   *     expect([1, 2, 3]).to.have.lengthOf.within(2, 4); // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.within`.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.not.be.within(2, 4); // Not recommended
+   *
+   * `.within` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`.
+   *
+   *     expect(4).to.be.within(1, 3, 'nooo why fail??');
+   *     expect(4, 'nooo why fail??').to.be.within(1, 3);
+   *
+   * @name within
+   * @param {Number} start lower bound inclusive
+   * @param {Number} finish upper bound inclusive
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addMethod('within', function (start, finish, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , doLength = flag(this, 'doLength')
+      , flagMsg = flag(this, 'message')
+      , msgPrefix = ((flagMsg) ? flagMsg + ': ' : '')
+      , ssfi = flag(this, 'ssfi')
+      , objType = _.type(obj).toLowerCase()
+      , startType = _.type(start).toLowerCase()
+      , finishType = _.type(finish).toLowerCase()
+      , errorMessage
+      , shouldThrow = true
+      , range = (startType === 'date' && finishType === 'date')
+          ? start.toUTCString() + '..' + finish.toUTCString()
+          : start + '..' + finish;
+
+    if (doLength && objType !== 'map' && objType !== 'set') {
+      new Assertion(obj, flagMsg, ssfi, true).to.have.property('length');
+    }
+
+    if (!doLength && (objType === 'date' && (startType !== 'date' || finishType !== 'date'))) {
+      errorMessage = msgPrefix + 'the arguments to within must be dates';
+    } else if ((startType !== 'number' || finishType !== 'number') && (doLength || objType === 'number')) {
+      errorMessage = msgPrefix + 'the arguments to within must be numbers';
+    } else if (!doLength && (objType !== 'date' && objType !== 'number')) {
+      var printObj = (objType === 'string') ? "'" + obj + "'" : obj;
+      errorMessage = msgPrefix + 'expected ' + printObj + ' to be a number or a date';
+    } else {
+      shouldThrow = false;
+    }
+
+    if (shouldThrow) {
+      throw new AssertionError(errorMessage, undefined, ssfi);
+    }
+
+    if (doLength) {
+      var descriptor = 'length'
+        , itemsCount;
+      if (objType === 'map' || objType === 'set') {
+        descriptor = 'size';
+        itemsCount = obj.size;
+      } else {
+        itemsCount = obj.length;
+      }
+      this.assert(
+          itemsCount >= start && itemsCount <= finish
+        , 'expected #{this} to have a ' + descriptor + ' within ' + range
+        , 'expected #{this} to not have a ' + descriptor + ' within ' + range
+      );
+    } else {
+      this.assert(
+          obj >= start && obj <= finish
+        , 'expected #{this} to be within ' + range
+        , 'expected #{this} to not be within ' + range
+      );
+    }
+  });
+
+  /**
+   * ### .instanceof(constructor[, msg])
+   *
+   * Asserts that the target is an instance of the given `constructor`.
+   *
+   *     function Cat () { }
+   *
+   *     expect(new Cat()).to.be.an.instanceof(Cat);
+   *     expect([1, 2]).to.be.an.instanceof(Array);
+   *
+   * Add `.not` earlier in the chain to negate `.instanceof`.
+   *
+   *     expect({a: 1}).to.not.be.an.instanceof(Array);
+   *
+   * `.instanceof` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`.
+   *
+   *     expect(1).to.be.an.instanceof(Array, 'nooo why fail??');
+   *     expect(1, 'nooo why fail??').to.be.an.instanceof(Array);
+   *
+   * Due to limitations in ES5, `.instanceof` may not always work as expected
+   * when using a transpiler such as Babel or TypeScript. In particular, it may
+   * produce unexpected results when subclassing built-in object such as
+   * `Array`, `Error`, and `Map`. See your transpiler's docs for details:
+   *
+   * - ([Babel](https://babeljs.io/docs/usage/caveats/#classes))
+   * - ([TypeScript](https://github.com/Microsoft/TypeScript/wiki/Breaking-Changes#extending-built-ins-like-error-array-and-map-may-no-longer-work))
+   *
+   * The alias `.instanceOf` can be used interchangeably with `.instanceof`.
+   *
+   * @name instanceof
+   * @param {Constructor} constructor
+   * @param {String} msg _optional_
+   * @alias instanceOf
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertInstanceOf (constructor, msg) {
+    if (msg) flag(this, 'message', msg);
+
+    var target = flag(this, 'object')
+    var ssfi = flag(this, 'ssfi');
+    var flagMsg = flag(this, 'message');
+
+    try {
+      var isInstanceOf = target instanceof constructor;
+    } catch (err) {
+      if (err instanceof TypeError) {
+        flagMsg = flagMsg ? flagMsg + ': ' : '';
+        throw new AssertionError(
+          flagMsg + 'The instanceof assertion needs a constructor but '
+            + _.type(constructor) + ' was given.',
+          undefined,
+          ssfi
+        );
+      }
+      throw err;
+    }
+
+    var name = _.getName(constructor);
+    if (name === null) {
+      name = 'an unnamed constructor';
+    }
+
+    this.assert(
+        isInstanceOf
+      , 'expected #{this} to be an instance of ' + name
+      , 'expected #{this} to not be an instance of ' + name
+    );
+  };
+
+  Assertion.addMethod('instanceof', assertInstanceOf);
+  Assertion.addMethod('instanceOf', assertInstanceOf);
+
+  /**
+   * ### .property(name[, val[, msg]])
+   *
+   * Asserts that the target has a property with the given key `name`.
+   *
+   *     expect({a: 1}).to.have.property('a');
+   *
+   * When `val` is provided, `.property` also asserts that the property's value
+   * is equal to the given `val`.
+   *
+   *     expect({a: 1}).to.have.property('a', 1);
+   *
+   * By default, strict (`===`) equality is used. Add `.deep` earlier in the
+   * chain to use deep equality instead. See the `deep-eql` project page for
+   * info on the deep equality algorithm: https://github.com/chaijs/deep-eql.
+   *
+   *     // Target object deeply (but not strictly) has property `x: {a: 1}`
+   *     expect({x: {a: 1}}).to.have.deep.property('x', {a: 1});
+   *     expect({x: {a: 1}}).to.not.have.property('x', {a: 1});
+   *
+   * The target's enumerable and non-enumerable properties are always included
+   * in the search. By default, both own and inherited properties are included.
+   * Add `.own` earlier in the chain to exclude inherited properties from the
+   * search.
+   *
+   *     Object.prototype.b = 2;
+   *
+   *     expect({a: 1}).to.have.own.property('a');
+   *     expect({a: 1}).to.have.own.property('a', 1);
+   *     expect({a: 1}).to.have.property('b');
+   *     expect({a: 1}).to.not.have.own.property('b');
+   *
+   * `.deep` and `.own` can be combined.
+   *
+   *     expect({x: {a: 1}}).to.have.deep.own.property('x', {a: 1});
+   *
+   * Add `.nested` earlier in the chain to enable dot- and bracket-notation when
+   * referencing nested properties.
+   *
+   *     expect({a: {b: ['x', 'y']}}).to.have.nested.property('a.b[1]');
+   *     expect({a: {b: ['x', 'y']}}).to.have.nested.property('a.b[1]', 'y');
+   *
+   * If `.` or `[]` are part of an actual property name, they can be escaped by
+   * adding two backslashes before them.
+   *
+   *     expect({'.a': {'[b]': 'x'}}).to.have.nested.property('\\.a.\\[b\\]');
+   *
+   * `.deep` and `.nested` can be combined.
+   *
+   *     expect({a: {b: [{c: 3}]}})
+   *       .to.have.deep.nested.property('a.b[0]', {c: 3});
+   *
+   * `.own` and `.nested` cannot be combined.
+   *
+   * Add `.not` earlier in the chain to negate `.property`.
+   *
+   *     expect({a: 1}).to.not.have.property('b');
+   *
+   * However, it's dangerous to negate `.property` when providing `val`. The
+   * problem is that it creates uncertain expectations by asserting that the
+   * target either doesn't have a property with the given key `name`, or that it
+   * does have a property with the given key `name` but its value isn't equal to
+   * the given `val`. It's often best to identify the exact output that's
+   * expected, and then write an assertion that only accepts that exact output.
+   *
+   * When the target isn't expected to have a property with the given key
+   * `name`, it's often best to assert exactly that.
+   *
+   *     expect({b: 2}).to.not.have.property('a'); // Recommended
+   *     expect({b: 2}).to.not.have.property('a', 1); // Not recommended
+   *
+   * When the target is expected to have a property with the given key `name`,
+   * it's often best to assert that the property has its expected value, rather
+   * than asserting that it doesn't have one of many unexpected values.
+   *
+   *     expect({a: 3}).to.have.property('a', 3); // Recommended
+   *     expect({a: 3}).to.not.have.property('a', 1); // Not recommended
+   *
+   * `.property` changes the target of any assertions that follow in the chain
+   * to be the value of the property from the original target object.
+   *
+   *     expect({a: 1}).to.have.property('a').that.is.a('number');
+   *
+   * `.property` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`. When not providing `val`, only use the
+   * second form.
+   *
+   *     // Recommended
+   *     expect({a: 1}).to.have.property('a', 2, 'nooo why fail??');
+   *     expect({a: 1}, 'nooo why fail??').to.have.property('a', 2);
+   *     expect({a: 1}, 'nooo why fail??').to.have.property('b');
+   *
+   *     // Not recommended
+   *     expect({a: 1}).to.have.property('b', undefined, 'nooo why fail??');
+   *
+   * The above assertion isn't the same thing as not providing `val`. Instead,
+   * it's asserting that the target object has a `b` property that's equal to
+   * `undefined`.
+   *
+   * The assertions `.ownProperty` and `.haveOwnProperty` can be used
+   * interchangeably with `.own.property`.
+   *
+   * @name property
+   * @param {String} name
+   * @param {Mixed} val (optional)
+   * @param {String} msg _optional_
+   * @returns value of property for chaining
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertProperty (name, val, msg) {
+    if (msg) flag(this, 'message', msg);
+
+    var isNested = flag(this, 'nested')
+      , isOwn = flag(this, 'own')
+      , flagMsg = flag(this, 'message')
+      , obj = flag(this, 'object')
+      , ssfi = flag(this, 'ssfi')
+      , nameType = typeof name;
+
+    flagMsg = flagMsg ? flagMsg + ': ' : '';
+
+    if (isNested) {
+      if (nameType !== 'string') {
+        throw new AssertionError(
+          flagMsg + 'the argument to property must be a string when using nested syntax',
+          undefined,
+          ssfi
+        );
+      }
+    } else {
+      if (nameType !== 'string' && nameType !== 'number' && nameType !== 'symbol') {
+        throw new AssertionError(
+          flagMsg + 'the argument to property must be a string, number, or symbol',
+          undefined,
+          ssfi
+        );
+      }
+    }
+
+    if (isNested && isOwn) {
+      throw new AssertionError(
+        flagMsg + 'The "nested" and "own" flags cannot be combined.',
+        undefined,
+        ssfi
+      );
+    }
+
+    if (obj === null || obj === undefined) {
+      throw new AssertionError(
+        flagMsg + 'Target cannot be null or undefined.',
+        undefined,
+        ssfi
+      );
+    }
+
+    var isDeep = flag(this, 'deep')
+      , negate = flag(this, 'negate')
+      , pathInfo = isNested ? _.getPathInfo(obj, name) : null
+      , value = isNested ? pathInfo.value : obj[name];
+
+    var descriptor = '';
+    if (isDeep) descriptor += 'deep ';
+    if (isOwn) descriptor += 'own ';
+    if (isNested) descriptor += 'nested ';
+    descriptor += 'property ';
+
+    var hasProperty;
+    if (isOwn) hasProperty = Object.prototype.hasOwnProperty.call(obj, name);
+    else if (isNested) hasProperty = pathInfo.exists;
+    else hasProperty = _.hasProperty(obj, name);
+
+    // When performing a negated assertion for both name and val, merely having
+    // a property with the given name isn't enough to cause the assertion to
+    // fail. It must both have a property with the given name, and the value of
+    // that property must equal the given val. Therefore, skip this assertion in
+    // favor of the next.
+    if (!negate || arguments.length === 1) {
+      this.assert(
+          hasProperty
+        , 'expected #{this} to have ' + descriptor + _.inspect(name)
+        , 'expected #{this} to not have ' + descriptor + _.inspect(name));
+    }
+
+    if (arguments.length > 1) {
+      this.assert(
+          hasProperty && (isDeep ? _.eql(val, value) : val === value)
+        , 'expected #{this} to have ' + descriptor + _.inspect(name) + ' of #{exp}, but got #{act}'
+        , 'expected #{this} to not have ' + descriptor + _.inspect(name) + ' of #{act}'
+        , val
+        , value
+      );
+    }
+
+    flag(this, 'object', value);
+  }
+
+  Assertion.addMethod('property', assertProperty);
+
+  function assertOwnProperty (name, value, msg) {
+    flag(this, 'own', true);
+    assertProperty.apply(this, arguments);
+  }
+
+  Assertion.addMethod('ownProperty', assertOwnProperty);
+  Assertion.addMethod('haveOwnProperty', assertOwnProperty);
+
+  /**
+   * ### .ownPropertyDescriptor(name[, descriptor[, msg]])
+   *
+   * Asserts that the target has its own property descriptor with the given key
+   * `name`. Enumerable and non-enumerable properties are included in the
+   * search.
+   *
+   *     expect({a: 1}).to.have.ownPropertyDescriptor('a');
+   *
+   * When `descriptor` is provided, `.ownPropertyDescriptor` also asserts that
+   * the property's descriptor is deeply equal to the given `descriptor`. See
+   * the `deep-eql` project page for info on the deep equality algorithm:
+   * https://github.com/chaijs/deep-eql.
+   *
+   *     expect({a: 1}).to.have.ownPropertyDescriptor('a', {
+   *       configurable: true,
+   *       enumerable: true,
+   *       writable: true,
+   *       value: 1,
+   *     });
+   *
+   * Add `.not` earlier in the chain to negate `.ownPropertyDescriptor`.
+   *
+   *     expect({a: 1}).to.not.have.ownPropertyDescriptor('b');
+   *
+   * However, it's dangerous to negate `.ownPropertyDescriptor` when providing
+   * a `descriptor`. The problem is that it creates uncertain expectations by
+   * asserting that the target either doesn't have a property descriptor with
+   * the given key `name`, or that it does have a property descriptor with the
+   * given key `name` but its not deeply equal to the given `descriptor`. It's
+   * often best to identify the exact output that's expected, and then write an
+   * assertion that only accepts that exact output.
+   *
+   * When the target isn't expected to have a property descriptor with the given
+   * key `name`, it's often best to assert exactly that.
+   *
+   *     // Recommended
+   *     expect({b: 2}).to.not.have.ownPropertyDescriptor('a');
+   *
+   *     // Not recommended
+   *     expect({b: 2}).to.not.have.ownPropertyDescriptor('a', {
+   *       configurable: true,
+   *       enumerable: true,
+   *       writable: true,
+   *       value: 1,
+   *     });
+   *
+   * When the target is expected to have a property descriptor with the given
+   * key `name`, it's often best to assert that the property has its expected
+   * descriptor, rather than asserting that it doesn't have one of many
+   * unexpected descriptors.
+   *
+   *     // Recommended
+   *     expect({a: 3}).to.have.ownPropertyDescriptor('a', {
+   *       configurable: true,
+   *       enumerable: true,
+   *       writable: true,
+   *       value: 3,
+   *     });
+   *
+   *     // Not recommended
+   *     expect({a: 3}).to.not.have.ownPropertyDescriptor('a', {
+   *       configurable: true,
+   *       enumerable: true,
+   *       writable: true,
+   *       value: 1,
+   *     });
+   *
+   * `.ownPropertyDescriptor` changes the target of any assertions that follow
+   * in the chain to be the value of the property descriptor from the original
+   * target object.
+   *
+   *     expect({a: 1}).to.have.ownPropertyDescriptor('a')
+   *       .that.has.property('enumerable', true);
+   *
+   * `.ownPropertyDescriptor` accepts an optional `msg` argument which is a
+   * custom error message to show when the assertion fails. The message can also
+   * be given as the second argument to `expect`. When not providing
+   * `descriptor`, only use the second form.
+   *
+   *     // Recommended
+   *     expect({a: 1}).to.have.ownPropertyDescriptor('a', {
+   *       configurable: true,
+   *       enumerable: true,
+   *       writable: true,
+   *       value: 2,
+   *     }, 'nooo why fail??');
+   *
+   *     // Recommended
+   *     expect({a: 1}, 'nooo why fail??').to.have.ownPropertyDescriptor('a', {
+   *       configurable: true,
+   *       enumerable: true,
+   *       writable: true,
+   *       value: 2,
+   *     });
+   *
+   *     // Recommended
+   *     expect({a: 1}, 'nooo why fail??').to.have.ownPropertyDescriptor('b');
+   *
+   *     // Not recommended
+   *     expect({a: 1})
+   *       .to.have.ownPropertyDescriptor('b', undefined, 'nooo why fail??');
+   *
+   * The above assertion isn't the same thing as not providing `descriptor`.
+   * Instead, it's asserting that the target object has a `b` property
+   * descriptor that's deeply equal to `undefined`.
+   *
+   * The alias `.haveOwnPropertyDescriptor` can be used interchangeably with
+   * `.ownPropertyDescriptor`.
+   *
+   * @name ownPropertyDescriptor
+   * @alias haveOwnPropertyDescriptor
+   * @param {String} name
+   * @param {Object} descriptor _optional_
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertOwnPropertyDescriptor (name, descriptor, msg) {
+    if (typeof descriptor === 'string') {
+      msg = descriptor;
+      descriptor = null;
+    }
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object');
+    var actualDescriptor = Object.getOwnPropertyDescriptor(Object(obj), name);
+    if (actualDescriptor && descriptor) {
+      this.assert(
+          _.eql(descriptor, actualDescriptor)
+        , 'expected the own property descriptor for ' + _.inspect(name) + ' on #{this} to match ' + _.inspect(descriptor) + ', got ' + _.inspect(actualDescriptor)
+        , 'expected the own property descriptor for ' + _.inspect(name) + ' on #{this} to not match ' + _.inspect(descriptor)
+        , descriptor
+        , actualDescriptor
+        , true
+      );
+    } else {
+      this.assert(
+          actualDescriptor
+        , 'expected #{this} to have an own property descriptor for ' + _.inspect(name)
+        , 'expected #{this} to not have an own property descriptor for ' + _.inspect(name)
+      );
+    }
+    flag(this, 'object', actualDescriptor);
+  }
+
+  Assertion.addMethod('ownPropertyDescriptor', assertOwnPropertyDescriptor);
+  Assertion.addMethod('haveOwnPropertyDescriptor', assertOwnPropertyDescriptor);
+
+  /**
+   * ### .lengthOf(n[, msg])
+   *
+   * Asserts that the target's `length` or `size` is equal to the given number
+   * `n`.
+   *
+   *     expect([1, 2, 3]).to.have.lengthOf(3);
+   *     expect('foo').to.have.lengthOf(3);
+   *     expect(new Set([1, 2, 3])).to.have.lengthOf(3);
+   *     expect(new Map([['a', 1], ['b', 2], ['c', 3]])).to.have.lengthOf(3);
+   *
+   * Add `.not` earlier in the chain to negate `.lengthOf`. However, it's often
+   * best to assert that the target's `length` property is equal to its expected
+   * value, rather than not equal to one of many unexpected values.
+   *
+   *     expect('foo').to.have.lengthOf(3); // Recommended
+   *     expect('foo').to.not.have.lengthOf(4); // Not recommended
+   *
+   * `.lengthOf` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`.
+   *
+   *     expect([1, 2, 3]).to.have.lengthOf(2, 'nooo why fail??');
+   *     expect([1, 2, 3], 'nooo why fail??').to.have.lengthOf(2);
+   *
+   * `.lengthOf` can also be used as a language chain, causing all `.above`,
+   * `.below`, `.least`, `.most`, and `.within` assertions that follow in the
+   * chain to use the target's `length` property as the target. However, it's
+   * often best to assert that the target's `length` property is equal to its
+   * expected length, rather than asserting that its `length` property falls
+   * within some range of values.
+   *
+   *     // Recommended
+   *     expect([1, 2, 3]).to.have.lengthOf(3);
+   *
+   *     // Not recommended
+   *     expect([1, 2, 3]).to.have.lengthOf.above(2);
+   *     expect([1, 2, 3]).to.have.lengthOf.below(4);
+   *     expect([1, 2, 3]).to.have.lengthOf.at.least(3);
+   *     expect([1, 2, 3]).to.have.lengthOf.at.most(3);
+   *     expect([1, 2, 3]).to.have.lengthOf.within(2,4);
+   *
+   * Due to a compatibility issue, the alias `.length` can't be chained directly
+   * off of an uninvoked method such as `.a`. Therefore, `.length` can't be used
+   * interchangeably with `.lengthOf` in every situation. It's recommended to
+   * always use `.lengthOf` instead of `.length`.
+   *
+   *     expect([1, 2, 3]).to.have.a.length(3); // incompatible; throws error
+   *     expect([1, 2, 3]).to.have.a.lengthOf(3);  // passes as expected
+   *
+   * @name lengthOf
+   * @alias length
+   * @param {Number} n
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertLengthChain () {
+    flag(this, 'doLength', true);
+  }
+
+  function assertLength (n, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , objType = _.type(obj).toLowerCase()
+      , flagMsg = flag(this, 'message')
+      , ssfi = flag(this, 'ssfi')
+      , descriptor = 'length'
+      , itemsCount;
+
+    switch (objType) {
+      case 'map':
+      case 'set':
+        descriptor = 'size';
+        itemsCount = obj.size;
+        break;
+      default:
+        new Assertion(obj, flagMsg, ssfi, true).to.have.property('length');
+        itemsCount = obj.length;
+    }
+
+    this.assert(
+        itemsCount == n
+      , 'expected #{this} to have a ' + descriptor + ' of #{exp} but got #{act}'
+      , 'expected #{this} to not have a ' + descriptor + ' of #{act}'
+      , n
+      , itemsCount
+    );
+  }
+
+  Assertion.addChainableMethod('length', assertLength, assertLengthChain);
+  Assertion.addChainableMethod('lengthOf', assertLength, assertLengthChain);
+
+  /**
+   * ### .match(re[, msg])
+   *
+   * Asserts that the target matches the given regular expression `re`.
+   *
+   *     expect('foobar').to.match(/^foo/);
+   *
+   * Add `.not` earlier in the chain to negate `.match`.
+   *
+   *     expect('foobar').to.not.match(/taco/);
+   *
+   * `.match` accepts an optional `msg` argument which is a custom error message
+   * to show when the assertion fails. The message can also be given as the
+   * second argument to `expect`.
+   *
+   *     expect('foobar').to.match(/taco/, 'nooo why fail??');
+   *     expect('foobar', 'nooo why fail??').to.match(/taco/);
+   *
+   * The alias `.matches` can be used interchangeably with `.match`.
+   *
+   * @name match
+   * @alias matches
+   * @param {RegExp} re
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+  function assertMatch(re, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object');
+    this.assert(
+        re.exec(obj)
+      , 'expected #{this} to match ' + re
+      , 'expected #{this} not to match ' + re
+    );
+  }
+
+  Assertion.addMethod('match', assertMatch);
+  Assertion.addMethod('matches', assertMatch);
+
+  /**
+   * ### .string(str[, msg])
+   *
+   * Asserts that the target string contains the given substring `str`.
+   *
+   *     expect('foobar').to.have.string('bar');
+   *
+   * Add `.not` earlier in the chain to negate `.string`.
+   *
+   *     expect('foobar').to.not.have.string('taco');
+   *
+   * `.string` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`.
+   *
+   *     expect('foobar').to.have.string('taco', 'nooo why fail??');
+   *     expect('foobar', 'nooo why fail??').to.have.string('taco');
+   *
+   * @name string
+   * @param {String} str
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addMethod('string', function (str, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , flagMsg = flag(this, 'message')
+      , ssfi = flag(this, 'ssfi');
+    new Assertion(obj, flagMsg, ssfi, true).is.a('string');
+
+    this.assert(
+        ~obj.indexOf(str)
+      , 'expected #{this} to contain ' + _.inspect(str)
+      , 'expected #{this} to not contain ' + _.inspect(str)
+    );
+  });
+
+  /**
+   * ### .keys(key1[, key2[, ...]])
+   *
+   * Asserts that the target object, array, map, or set has the given keys. Only
+   * the target's own inherited properties are included in the search.
+   *
+   * When the target is an object or array, keys can be provided as one or more
+   * string arguments, a single array argument, or a single object argument. In
+   * the latter case, only the keys in the given object matter; the values are
+   * ignored.
+   *
+   *     expect({a: 1, b: 2}).to.have.all.keys('a', 'b');
+   *     expect(['x', 'y']).to.have.all.keys(0, 1);
+   *
+   *     expect({a: 1, b: 2}).to.have.all.keys(['a', 'b']);
+   *     expect(['x', 'y']).to.have.all.keys([0, 1]);
+   *
+   *     expect({a: 1, b: 2}).to.have.all.keys({a: 4, b: 5}); // ignore 4 and 5
+   *     expect(['x', 'y']).to.have.all.keys({0: 4, 1: 5}); // ignore 4 and 5
+   *
+   * When the target is a map or set, each key must be provided as a separate
+   * argument.
+   *
+   *     expect(new Map([['a', 1], ['b', 2]])).to.have.all.keys('a', 'b');
+   *     expect(new Set(['a', 'b'])).to.have.all.keys('a', 'b');
+   *
+   * Because `.keys` does different things based on the target's type, it's
+   * important to check the target's type before using `.keys`. See the `.a` doc
+   * for info on testing a target's type.
+   *
+   *     expect({a: 1, b: 2}).to.be.an('object').that.has.all.keys('a', 'b');
+   *
+   * By default, strict (`===`) equality is used to compare keys of maps and
+   * sets. Add `.deep` earlier in the chain to use deep equality instead. See
+   * the `deep-eql` project page for info on the deep equality algorithm:
+   * https://github.com/chaijs/deep-eql.
+   *
+   *     // Target set deeply (but not strictly) has key `{a: 1}`
+   *     expect(new Set([{a: 1}])).to.have.all.deep.keys([{a: 1}]);
+   *     expect(new Set([{a: 1}])).to.not.have.all.keys([{a: 1}]);
+   *
+   * By default, the target must have all of the given keys and no more. Add
+   * `.any` earlier in the chain to only require that the target have at least
+   * one of the given keys. Also, add `.not` earlier in the chain to negate
+   * `.keys`. It's often best to add `.any` when negating `.keys`, and to use
+   * `.all` when asserting `.keys` without negation.
+   *
+   * When negating `.keys`, `.any` is preferred because `.not.any.keys` asserts
+   * exactly what's expected of the output, whereas `.not.all.keys` creates
+   * uncertain expectations.
+   *
+   *     // Recommended; asserts that target doesn't have any of the given keys
+   *     expect({a: 1, b: 2}).to.not.have.any.keys('c', 'd');
+   *
+   *     // Not recommended; asserts that target doesn't have all of the given
+   *     // keys but may or may not have some of them
+   *     expect({a: 1, b: 2}).to.not.have.all.keys('c', 'd');
+   *
+   * When asserting `.keys` without negation, `.all` is preferred because
+   * `.all.keys` asserts exactly what's expected of the output, whereas
+   * `.any.keys` creates uncertain expectations.
+   *
+   *     // Recommended; asserts that target has all the given keys
+   *     expect({a: 1, b: 2}).to.have.all.keys('a', 'b');
+   *
+   *     // Not recommended; asserts that target has at least one of the given
+   *     // keys but may or may not have more of them
+   *     expect({a: 1, b: 2}).to.have.any.keys('a', 'b');
+   *
+   * Note that `.all` is used by default when neither `.all` nor `.any` appear
+   * earlier in the chain. However, it's often best to add `.all` anyway because
+   * it improves readability.
+   *
+   *     // Both assertions are identical
+   *     expect({a: 1, b: 2}).to.have.all.keys('a', 'b'); // Recommended
+   *     expect({a: 1, b: 2}).to.have.keys('a', 'b'); // Not recommended
+   *
+   * Add `.include` earlier in the chain to require that the target's keys be a
+   * superset of the expected keys, rather than identical sets.
+   *
+   *     // Target object's keys are a superset of ['a', 'b'] but not identical
+   *     expect({a: 1, b: 2, c: 3}).to.include.all.keys('a', 'b');
+   *     expect({a: 1, b: 2, c: 3}).to.not.have.all.keys('a', 'b');
+   *
+   * However, if `.any` and `.include` are combined, only the `.any` takes
+   * effect. The `.include` is ignored in this case.
+   *
+   *     // Both assertions are identical
+   *     expect({a: 1}).to.have.any.keys('a', 'b');
+   *     expect({a: 1}).to.include.any.keys('a', 'b');
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect({a: 1}, 'nooo why fail??').to.have.key('b');
+   *
+   * The alias `.key` can be used interchangeably with `.keys`.
+   *
+   * @name keys
+   * @alias key
+   * @param {...String|Array|Object} keys
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertKeys (keys) {
+    var obj = flag(this, 'object')
+      , objType = _.type(obj)
+      , keysType = _.type(keys)
+      , ssfi = flag(this, 'ssfi')
+      , isDeep = flag(this, 'deep')
+      , str
+      , deepStr = ''
+      , actual
+      , ok = true
+      , flagMsg = flag(this, 'message');
+
+    flagMsg = flagMsg ? flagMsg + ': ' : '';
+    var mixedArgsMsg = flagMsg + 'when testing keys against an object or an array you must give a single Array|Object|String argument or multiple String arguments';
+
+    if (objType === 'Map' || objType === 'Set') {
+      deepStr = isDeep ? 'deeply ' : '';
+      actual = [];
+
+      // Map and Set '.keys' aren't supported in IE 11. Therefore, use .forEach.
+      obj.forEach(function (val, key) { actual.push(key) });
+
+      if (keysType !== 'Array') {
+        keys = Array.prototype.slice.call(arguments);
+      }
+    } else {
+      actual = _.getOwnEnumerableProperties(obj);
+
+      switch (keysType) {
+        case 'Array':
+          if (arguments.length > 1) {
+            throw new AssertionError(mixedArgsMsg, undefined, ssfi);
+          }
+          break;
+        case 'Object':
+          if (arguments.length > 1) {
+            throw new AssertionError(mixedArgsMsg, undefined, ssfi);
+          }
+          keys = Object.keys(keys);
+          break;
+        default:
+          keys = Array.prototype.slice.call(arguments);
+      }
+
+      // Only stringify non-Symbols because Symbols would become "Symbol()"
+      keys = keys.map(function (val) {
+        return typeof val === 'symbol' ? val : String(val);
+      });
+    }
+
+    if (!keys.length) {
+      throw new AssertionError(flagMsg + 'keys required', undefined, ssfi);
+    }
+
+    var len = keys.length
+      , any = flag(this, 'any')
+      , all = flag(this, 'all')
+      , expected = keys;
+
+    if (!any && !all) {
+      all = true;
+    }
+
+    // Has any
+    if (any) {
+      ok = expected.some(function(expectedKey) {
+        return actual.some(function(actualKey) {
+          if (isDeep) {
+            return _.eql(expectedKey, actualKey);
+          } else {
+            return expectedKey === actualKey;
+          }
+        });
+      });
+    }
+
+    // Has all
+    if (all) {
+      ok = expected.every(function(expectedKey) {
+        return actual.some(function(actualKey) {
+          if (isDeep) {
+            return _.eql(expectedKey, actualKey);
+          } else {
+            return expectedKey === actualKey;
+          }
+        });
+      });
+
+      if (!flag(this, 'contains')) {
+        ok = ok && keys.length == actual.length;
+      }
+    }
+
+    // Key string
+    if (len > 1) {
+      keys = keys.map(function(key) {
+        return _.inspect(key);
+      });
+      var last = keys.pop();
+      if (all) {
+        str = keys.join(', ') + ', and ' + last;
+      }
+      if (any) {
+        str = keys.join(', ') + ', or ' + last;
+      }
+    } else {
+      str = _.inspect(keys[0]);
+    }
+
+    // Form
+    str = (len > 1 ? 'keys ' : 'key ') + str;
+
+    // Have / include
+    str = (flag(this, 'contains') ? 'contain ' : 'have ') + str;
+
+    // Assertion
+    this.assert(
+        ok
+      , 'expected #{this} to ' + deepStr + str
+      , 'expected #{this} to not ' + deepStr + str
+      , expected.slice(0).sort(_.compareByInspect)
+      , actual.sort(_.compareByInspect)
+      , true
+    );
+  }
+
+  Assertion.addMethod('keys', assertKeys);
+  Assertion.addMethod('key', assertKeys);
+
+  /**
+   * ### .throw([errorLike], [errMsgMatcher], [msg])
+   *
+   * When no arguments are provided, `.throw` invokes the target function and
+   * asserts that an error is thrown.
+   *
+   *     var badFn = function () { throw new TypeError('Illegal salmon!'); };
+   *
+   *     expect(badFn).to.throw();
+   *
+   * When one argument is provided, and it's an error constructor, `.throw`
+   * invokes the target function and asserts that an error is thrown that's an
+   * instance of that error constructor.
+   *
+   *     var badFn = function () { throw new TypeError('Illegal salmon!'); };
+   *
+   *     expect(badFn).to.throw(TypeError);
+   *
+   * When one argument is provided, and it's an error instance, `.throw` invokes
+   * the target function and asserts that an error is thrown that's strictly
+   * (`===`) equal to that error instance.
+   *
+   *     var err = new TypeError('Illegal salmon!');
+   *     var badFn = function () { throw err; };
+   *
+   *     expect(badFn).to.throw(err);
+   *
+   * When one argument is provided, and it's a string, `.throw` invokes the
+   * target function and asserts that an error is thrown with a message that
+   * contains that string.
+   *
+   *     var badFn = function () { throw new TypeError('Illegal salmon!'); };
+   *
+   *     expect(badFn).to.throw('salmon');
+   *
+   * When one argument is provided, and it's a regular expression, `.throw`
+   * invokes the target function and asserts that an error is thrown with a
+   * message that matches that regular expression.
+   *
+   *     var badFn = function () { throw new TypeError('Illegal salmon!'); };
+   *
+   *     expect(badFn).to.throw(/salmon/);
+   *
+   * When two arguments are provided, and the first is an error instance or
+   * constructor, and the second is a string or regular expression, `.throw`
+   * invokes the function and asserts that an error is thrown that fulfills both
+   * conditions as described above.
+   *
+   *     var err = new TypeError('Illegal salmon!');
+   *     var badFn = function () { throw err; };
+   *
+   *     expect(badFn).to.throw(TypeError, 'salmon');
+   *     expect(badFn).to.throw(TypeError, /salmon/);
+   *     expect(badFn).to.throw(err, 'salmon');
+   *     expect(badFn).to.throw(err, /salmon/);
+   *
+   * Add `.not` earlier in the chain to negate `.throw`.
+   *
+   *     var goodFn = function () {};
+   *
+   *     expect(goodFn).to.not.throw();
+   *
+   * However, it's dangerous to negate `.throw` when providing any arguments.
+   * The problem is that it creates uncertain expectations by asserting that the
+   * target either doesn't throw an error, or that it throws an error but of a
+   * different type than the given type, or that it throws an error of the given
+   * type but with a message that doesn't include the given string. It's often
+   * best to identify the exact output that's expected, and then write an
+   * assertion that only accepts that exact output.
+   *
+   * When the target isn't expected to throw an error, it's often best to assert
+   * exactly that.
+   *
+   *     var goodFn = function () {};
+   *
+   *     expect(goodFn).to.not.throw(); // Recommended
+   *     expect(goodFn).to.not.throw(ReferenceError, 'x'); // Not recommended
+   *
+   * When the target is expected to throw an error, it's often best to assert
+   * that the error is of its expected type, and has a message that includes an
+   * expected string, rather than asserting that it doesn't have one of many
+   * unexpected types, and doesn't have a message that includes some string.
+   *
+   *     var badFn = function () { throw new TypeError('Illegal salmon!'); };
+   *
+   *     expect(badFn).to.throw(TypeError, 'salmon'); // Recommended
+   *     expect(badFn).to.not.throw(ReferenceError, 'x'); // Not recommended
+   *
+   * `.throw` changes the target of any assertions that follow in the chain to
+   * be the error object that's thrown.
+   *
+   *     var err = new TypeError('Illegal salmon!');
+   *     err.code = 42;
+   *     var badFn = function () { throw err; };
+   *
+   *     expect(badFn).to.throw(TypeError).with.property('code', 42);
+   *
+   * `.throw` accepts an optional `msg` argument which is a custom error message
+   * to show when the assertion fails. The message can also be given as the
+   * second argument to `expect`. When not providing two arguments, always use
+   * the second form.
+   *
+   *     var goodFn = function () {};
+   *
+   *     expect(goodFn).to.throw(TypeError, 'x', 'nooo why fail??');
+   *     expect(goodFn, 'nooo why fail??').to.throw();
+   *
+   * Due to limitations in ES5, `.throw` may not always work as expected when
+   * using a transpiler such as Babel or TypeScript. In particular, it may
+   * produce unexpected results when subclassing the built-in `Error` object and
+   * then passing the subclassed constructor to `.throw`. See your transpiler's
+   * docs for details:
+   *
+   * - ([Babel](https://babeljs.io/docs/usage/caveats/#classes))
+   * - ([TypeScript](https://github.com/Microsoft/TypeScript/wiki/Breaking-Changes#extending-built-ins-like-error-array-and-map-may-no-longer-work))
+   *
+   * Beware of some common mistakes when using the `throw` assertion. One common
+   * mistake is to accidentally invoke the function yourself instead of letting
+   * the `throw` assertion invoke the function for you. For example, when
+   * testing if a function named `fn` throws, provide `fn` instead of `fn()` as
+   * the target for the assertion.
+   *
+   *     expect(fn).to.throw();     // Good! Tests `fn` as desired
+   *     expect(fn()).to.throw();   // Bad! Tests result of `fn()`, not `fn`
+   *
+   * If you need to assert that your function `fn` throws when passed certain
+   * arguments, then wrap a call to `fn` inside of another function.
+   *
+   *     expect(function () { fn(42); }).to.throw();  // Function expression
+   *     expect(() => fn(42)).to.throw();             // ES6 arrow function
+   *
+   * Another common mistake is to provide an object method (or any stand-alone
+   * function that relies on `this`) as the target of the assertion. Doing so is
+   * problematic because the `this` context will be lost when the function is
+   * invoked by `.throw`; there's no way for it to know what `this` is supposed
+   * to be. There are two ways around this problem. One solution is to wrap the
+   * method or function call inside of another function. Another solution is to
+   * use `bind`.
+   *
+   *     expect(function () { cat.meow(); }).to.throw();  // Function expression
+   *     expect(() => cat.meow()).to.throw();             // ES6 arrow function
+   *     expect(cat.meow.bind(cat)).to.throw();           // Bind
+   *
+   * Finally, it's worth mentioning that it's a best practice in JavaScript to
+   * only throw `Error` and derivatives of `Error` such as `ReferenceError`,
+   * `TypeError`, and user-defined objects that extend `Error`. No other type of
+   * value will generate a stack trace when initialized. With that said, the
+   * `throw` assertion does technically support any type of value being thrown,
+   * not just `Error` and its derivatives.
+   *
+   * The aliases `.throws` and `.Throw` can be used interchangeably with
+   * `.throw`.
+   *
+   * @name throw
+   * @alias throws
+   * @alias Throw
+   * @param {Error|ErrorConstructor} errorLike
+   * @param {String|RegExp} errMsgMatcher error message
+   * @param {String} msg _optional_
+   * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
+   * @returns error for chaining (null if no error)
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertThrows (errorLike, errMsgMatcher, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , ssfi = flag(this, 'ssfi')
+      , flagMsg = flag(this, 'message')
+      , negate = flag(this, 'negate') || false;
+    new Assertion(obj, flagMsg, ssfi, true).is.a('function');
+
+    if (errorLike instanceof RegExp || typeof errorLike === 'string') {
+      errMsgMatcher = errorLike;
+      errorLike = null;
+    }
+
+    var caughtErr;
+    try {
+      obj();
+    } catch (err) {
+      caughtErr = err;
+    }
+
+    // If we have the negate flag enabled and at least one valid argument it means we do expect an error
+    // but we want it to match a given set of criteria
+    var everyArgIsUndefined = errorLike === undefined && errMsgMatcher === undefined;
+
+    // If we've got the negate flag enabled and both args, we should only fail if both aren't compatible
+    // See Issue #551 and PR #683@GitHub
+    var everyArgIsDefined = Boolean(errorLike && errMsgMatcher);
+    var errorLikeFail = false;
+    var errMsgMatcherFail = false;
+
+    // Checking if error was thrown
+    if (everyArgIsUndefined || !everyArgIsUndefined && !negate) {
+      // We need this to display results correctly according to their types
+      var errorLikeString = 'an error';
+      if (errorLike instanceof Error) {
+        errorLikeString = '#{exp}';
+      } else if (errorLike) {
+        errorLikeString = _.checkError.getConstructorName(errorLike);
+      }
+
+      this.assert(
+          caughtErr
+        , 'expected #{this} to throw ' + errorLikeString
+        , 'expected #{this} to not throw an error but #{act} was thrown'
+        , errorLike && errorLike.toString()
+        , (caughtErr instanceof Error ?
+            caughtErr.toString() : (typeof caughtErr === 'string' ? caughtErr : caughtErr &&
+                                    _.checkError.getConstructorName(caughtErr)))
+      );
+    }
+
+    if (errorLike && caughtErr) {
+      // We should compare instances only if `errorLike` is an instance of `Error`
+      if (errorLike instanceof Error) {
+        var isCompatibleInstance = _.checkError.compatibleInstance(caughtErr, errorLike);
+
+        if (isCompatibleInstance === negate) {
+          // These checks were created to ensure we won't fail too soon when we've got both args and a negate
+          // See Issue #551 and PR #683@GitHub
+          if (everyArgIsDefined && negate) {
+            errorLikeFail = true;
+          } else {
+            this.assert(
+                negate
+              , 'expected #{this} to throw #{exp} but #{act} was thrown'
+              , 'expected #{this} to not throw #{exp}' + (caughtErr && !negate ? ' but #{act} was thrown' : '')
+              , errorLike.toString()
+              , caughtErr.toString()
+            );
+          }
+        }
+      }
+
+      var isCompatibleConstructor = _.checkError.compatibleConstructor(caughtErr, errorLike);
+      if (isCompatibleConstructor === negate) {
+        if (everyArgIsDefined && negate) {
+            errorLikeFail = true;
+        } else {
+          this.assert(
+              negate
+            , 'expected #{this} to throw #{exp} but #{act} was thrown'
+            , 'expected #{this} to not throw #{exp}' + (caughtErr ? ' but #{act} was thrown' : '')
+            , (errorLike instanceof Error ? errorLike.toString() : errorLike && _.checkError.getConstructorName(errorLike))
+            , (caughtErr instanceof Error ? caughtErr.toString() : caughtErr && _.checkError.getConstructorName(caughtErr))
+          );
+        }
+      }
+    }
+
+    if (caughtErr && errMsgMatcher !== undefined && errMsgMatcher !== null) {
+      // Here we check compatible messages
+      var placeholder = 'including';
+      if (errMsgMatcher instanceof RegExp) {
+        placeholder = 'matching'
+      }
+
+      var isCompatibleMessage = _.checkError.compatibleMessage(caughtErr, errMsgMatcher);
+      if (isCompatibleMessage === negate) {
+        if (everyArgIsDefined && negate) {
+            errMsgMatcherFail = true;
+        } else {
+          this.assert(
+            negate
+            , 'expected #{this} to throw error ' + placeholder + ' #{exp} but got #{act}'
+            , 'expected #{this} to throw error not ' + placeholder + ' #{exp}'
+            ,  errMsgMatcher
+            ,  _.checkError.getMessage(caughtErr)
+          );
+        }
+      }
+    }
+
+    // If both assertions failed and both should've matched we throw an error
+    if (errorLikeFail && errMsgMatcherFail) {
+      this.assert(
+        negate
+        , 'expected #{this} to throw #{exp} but #{act} was thrown'
+        , 'expected #{this} to not throw #{exp}' + (caughtErr ? ' but #{act} was thrown' : '')
+        , (errorLike instanceof Error ? errorLike.toString() : errorLike && _.checkError.getConstructorName(errorLike))
+        , (caughtErr instanceof Error ? caughtErr.toString() : caughtErr && _.checkError.getConstructorName(caughtErr))
+      );
+    }
+
+    flag(this, 'object', caughtErr);
+  };
+
+  Assertion.addMethod('throw', assertThrows);
+  Assertion.addMethod('throws', assertThrows);
+  Assertion.addMethod('Throw', assertThrows);
+
+  /**
+   * ### .respondTo(method[, msg])
+   *
+   * When the target is a non-function object, `.respondTo` asserts that the
+   * target has a method with the given name `method`. The method can be own or
+   * inherited, and it can be enumerable or non-enumerable.
+   *
+   *     function Cat () {}
+   *     Cat.prototype.meow = function () {};
+   *
+   *     expect(new Cat()).to.respondTo('meow');
+   *
+   * When the target is a function, `.respondTo` asserts that the target's
+   * `prototype` property has a method with the given name `method`. Again, the
+   * method can be own or inherited, and it can be enumerable or non-enumerable.
+   *
+   *     function Cat () {}
+   *     Cat.prototype.meow = function () {};
+   *
+   *     expect(Cat).to.respondTo('meow');
+   *
+   * Add `.itself` earlier in the chain to force `.respondTo` to treat the
+   * target as a non-function object, even if it's a function. Thus, it asserts
+   * that the target has a method with the given name `method`, rather than
+   * asserting that the target's `prototype` property has a method with the
+   * given name `method`.
+   *
+   *     function Cat () {}
+   *     Cat.prototype.meow = function () {};
+   *     Cat.hiss = function () {};
+   *
+   *     expect(Cat).itself.to.respondTo('hiss').but.not.respondTo('meow');
+   *
+   * When not adding `.itself`, it's important to check the target's type before
+   * using `.respondTo`. See the `.a` doc for info on checking a target's type.
+   *
+   *     function Cat () {}
+   *     Cat.prototype.meow = function () {};
+   *
+   *     expect(new Cat()).to.be.an('object').that.respondsTo('meow');
+   *
+   * Add `.not` earlier in the chain to negate `.respondTo`.
+   *
+   *     function Dog () {}
+   *     Dog.prototype.bark = function () {};
+   *
+   *     expect(new Dog()).to.not.respondTo('meow');
+   *
+   * `.respondTo` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`.
+   *
+   *     expect({}).to.respondTo('meow', 'nooo why fail??');
+   *     expect({}, 'nooo why fail??').to.respondTo('meow');
+   *
+   * The alias `.respondsTo` can be used interchangeably with `.respondTo`.
+   *
+   * @name respondTo
+   * @alias respondsTo
+   * @param {String} method
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function respondTo (method, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , itself = flag(this, 'itself')
+      , context = ('function' === typeof obj && !itself)
+        ? obj.prototype[method]
+        : obj[method];
+
+    this.assert(
+        'function' === typeof context
+      , 'expected #{this} to respond to ' + _.inspect(method)
+      , 'expected #{this} to not respond to ' + _.inspect(method)
+    );
+  }
+
+  Assertion.addMethod('respondTo', respondTo);
+  Assertion.addMethod('respondsTo', respondTo);
+
+  /**
+   * ### .itself
+   *
+   * Forces all `.respondTo` assertions that follow in the chain to behave as if
+   * the target is a non-function object, even if it's a function. Thus, it
+   * causes `.respondTo` to assert that the target has a method with the given
+   * name, rather than asserting that the target's `prototype` property has a
+   * method with the given name.
+   *
+   *     function Cat () {}
+   *     Cat.prototype.meow = function () {};
+   *     Cat.hiss = function () {};
+   *
+   *     expect(Cat).itself.to.respondTo('hiss').but.not.respondTo('meow');
+   *
+   * @name itself
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('itself', function () {
+    flag(this, 'itself', true);
+  });
+
+  /**
+   * ### .satisfy(matcher[, msg])
+   *
+   * Invokes the given `matcher` function with the target being passed as the
+   * first argument, and asserts that the value returned is truthy.
+   *
+   *     expect(1).to.satisfy(function(num) {
+   *       return num > 0;
+   *     });
+   *
+   * Add `.not` earlier in the chain to negate `.satisfy`.
+   *
+   *     expect(1).to.not.satisfy(function(num) {
+   *       return num > 2;
+   *     });
+   *
+   * `.satisfy` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`.
+   *
+   *     expect(1).to.satisfy(function(num) {
+   *       return num > 2;
+   *     }, 'nooo why fail??');
+   *
+   *     expect(1, 'nooo why fail??').to.satisfy(function(num) {
+   *       return num > 2;
+   *     });
+   *
+   * The alias `.satisfies` can be used interchangeably with `.satisfy`.
+   *
+   * @name satisfy
+   * @alias satisfies
+   * @param {Function} matcher
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function satisfy (matcher, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object');
+    var result = matcher(obj);
+    this.assert(
+        result
+      , 'expected #{this} to satisfy ' + _.objDisplay(matcher)
+      , 'expected #{this} to not satisfy' + _.objDisplay(matcher)
+      , flag(this, 'negate') ? false : true
+      , result
+    );
+  }
+
+  Assertion.addMethod('satisfy', satisfy);
+  Assertion.addMethod('satisfies', satisfy);
+
+  /**
+   * ### .closeTo(expected, delta[, msg])
+   *
+   * Asserts that the target is a number that's within a given +/- `delta` range
+   * of the given number `expected`. However, it's often best to assert that the
+   * target is equal to its expected value.
+   *
+   *     // Recommended
+   *     expect(1.5).to.equal(1.5);
+   *
+   *     // Not recommended
+   *     expect(1.5).to.be.closeTo(1, 0.5);
+   *     expect(1.5).to.be.closeTo(2, 0.5);
+   *     expect(1.5).to.be.closeTo(1, 1);
+   *
+   * Add `.not` earlier in the chain to negate `.closeTo`.
+   *
+   *     expect(1.5).to.equal(1.5); // Recommended
+   *     expect(1.5).to.not.be.closeTo(3, 1); // Not recommended
+   *
+   * `.closeTo` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`.
+   *
+   *     expect(1.5).to.be.closeTo(3, 1, 'nooo why fail??');
+   *     expect(1.5, 'nooo why fail??').to.be.closeTo(3, 1);
+   *
+   * The alias `.approximately` can be used interchangeably with `.closeTo`.
+   *
+   * @name closeTo
+   * @alias approximately
+   * @param {Number} expected
+   * @param {Number} delta
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function closeTo(expected, delta, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , flagMsg = flag(this, 'message')
+      , ssfi = flag(this, 'ssfi');
+
+    new Assertion(obj, flagMsg, ssfi, true).is.a('number');
+    if (typeof expected !== 'number' || typeof delta !== 'number') {
+      flagMsg = flagMsg ? flagMsg + ': ' : '';
+      throw new AssertionError(
+          flagMsg + 'the arguments to closeTo or approximately must be numbers',
+          undefined,
+          ssfi
+      );
+    }
+
+    this.assert(
+        Math.abs(obj - expected) <= delta
+      , 'expected #{this} to be close to ' + expected + ' +/- ' + delta
+      , 'expected #{this} not to be close to ' + expected + ' +/- ' + delta
+    );
+  }
+
+  Assertion.addMethod('closeTo', closeTo);
+  Assertion.addMethod('approximately', closeTo);
+
+  // Note: Duplicates are ignored if testing for inclusion instead of sameness.
+  function isSubsetOf(subset, superset, cmp, contains, ordered) {
+    if (!contains) {
+      if (subset.length !== superset.length) return false;
+      superset = superset.slice();
+    }
+
+    return subset.every(function(elem, idx) {
+      if (ordered) return cmp ? cmp(elem, superset[idx]) : elem === superset[idx];
+
+      if (!cmp) {
+        var matchIdx = superset.indexOf(elem);
+        if (matchIdx === -1) return false;
+
+        // Remove match from superset so not counted twice if duplicate in subset.
+        if (!contains) superset.splice(matchIdx, 1);
+        return true;
+      }
+
+      return superset.some(function(elem2, matchIdx) {
+        if (!cmp(elem, elem2)) return false;
+
+        // Remove match from superset so not counted twice if duplicate in subset.
+        if (!contains) superset.splice(matchIdx, 1);
+        return true;
+      });
+    });
+  }
+
+  /**
+   * ### .members(set[, msg])
+   *
+   * Asserts that the target array has the same members as the given array
+   * `set`.
+   *
+   *     expect([1, 2, 3]).to.have.members([2, 1, 3]);
+   *     expect([1, 2, 2]).to.have.members([2, 1, 2]);
+   *
+   * By default, members are compared using strict (`===`) equality. Add `.deep`
+   * earlier in the chain to use deep equality instead. See the `deep-eql`
+   * project page for info on the deep equality algorithm:
+   * https://github.com/chaijs/deep-eql.
+   *
+   *     // Target array deeply (but not strictly) has member `{a: 1}`
+   *     expect([{a: 1}]).to.have.deep.members([{a: 1}]);
+   *     expect([{a: 1}]).to.not.have.members([{a: 1}]);
+   *
+   * By default, order doesn't matter. Add `.ordered` earlier in the chain to
+   * require that members appear in the same order.
+   *
+   *     expect([1, 2, 3]).to.have.ordered.members([1, 2, 3]);
+   *     expect([1, 2, 3]).to.have.members([2, 1, 3])
+   *       .but.not.ordered.members([2, 1, 3]);
+   *
+   * By default, both arrays must be the same size. Add `.include` earlier in
+   * the chain to require that the target's members be a superset of the
+   * expected members. Note that duplicates are ignored in the subset when
+   * `.include` is added.
+   *
+   *     // Target array is a superset of [1, 2] but not identical
+   *     expect([1, 2, 3]).to.include.members([1, 2]);
+   *     expect([1, 2, 3]).to.not.have.members([1, 2]);
+   *
+   *     // Duplicates in the subset are ignored
+   *     expect([1, 2, 3]).to.include.members([1, 2, 2, 2]);
+   *
+   * `.deep`, `.ordered`, and `.include` can all be combined. However, if
+   * `.include` and `.ordered` are combined, the ordering begins at the start of
+   * both arrays.
+   *
+   *     expect([{a: 1}, {b: 2}, {c: 3}])
+   *       .to.include.deep.ordered.members([{a: 1}, {b: 2}])
+   *       .but.not.include.deep.ordered.members([{b: 2}, {c: 3}]);
+   *
+   * Add `.not` earlier in the chain to negate `.members`. However, it's
+   * dangerous to do so. The problem is that it creates uncertain expectations
+   * by asserting that the target array doesn't have all of the same members as
+   * the given array `set` but may or may not have some of them. It's often best
+   * to identify the exact output that's expected, and then write an assertion
+   * that only accepts that exact output.
+   *
+   *     expect([1, 2]).to.not.include(3).and.not.include(4); // Recommended
+   *     expect([1, 2]).to.not.have.members([3, 4]); // Not recommended
+   *
+   * `.members` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`.
+   *
+   *     expect([1, 2]).to.have.members([1, 2, 3], 'nooo why fail??');
+   *     expect([1, 2], 'nooo why fail??').to.have.members([1, 2, 3]);
+   *
+   * @name members
+   * @param {Array} set
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addMethod('members', function (subset, msg) {
+    if (msg) flag(this, 'message', msg);
+    var obj = flag(this, 'object')
+      , flagMsg = flag(this, 'message')
+      , ssfi = flag(this, 'ssfi');
+
+    new Assertion(obj, flagMsg, ssfi, true).to.be.an('array');
+    new Assertion(subset, flagMsg, ssfi, true).to.be.an('array');
+
+    var contains = flag(this, 'contains');
+    var ordered = flag(this, 'ordered');
+
+    var subject, failMsg, failNegateMsg;
+
+    if (contains) {
+      subject = ordered ? 'an ordered superset' : 'a superset';
+      failMsg = 'expected #{this} to be ' + subject + ' of #{exp}';
+      failNegateMsg = 'expected #{this} to not be ' + subject + ' of #{exp}';
+    } else {
+      subject = ordered ? 'ordered members' : 'members';
+      failMsg = 'expected #{this} to have the same ' + subject + ' as #{exp}';
+      failNegateMsg = 'expected #{this} to not have the same ' + subject + ' as #{exp}';
+    }
+
+    var cmp = flag(this, 'deep') ? _.eql : undefined;
+
+    this.assert(
+        isSubsetOf(subset, obj, cmp, contains, ordered)
+      , failMsg
+      , failNegateMsg
+      , subset
+      , obj
+      , true
+    );
+  });
+
+  /**
+   * ### .oneOf(list[, msg])
+   *
+   * Asserts that the target is a member of the given array `list`. However,
+   * it's often best to assert that the target is equal to its expected value.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.be.oneOf([1, 2, 3]); // Not recommended
+   *
+   * Comparisons are performed using strict (`===`) equality.
+   *
+   * Add `.not` earlier in the chain to negate `.oneOf`.
+   *
+   *     expect(1).to.equal(1); // Recommended
+   *     expect(1).to.not.be.oneOf([2, 3, 4]); // Not recommended
+   *
+   * `.oneOf` accepts an optional `msg` argument which is a custom error message
+   * to show when the assertion fails. The message can also be given as the
+   * second argument to `expect`.
+   *
+   *     expect(1).to.be.oneOf([2, 3, 4], 'nooo why fail??');
+   *     expect(1, 'nooo why fail??').to.be.oneOf([2, 3, 4]);
+   *
+   * @name oneOf
+   * @param {Array<*>} list
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function oneOf (list, msg) {
+    if (msg) flag(this, 'message', msg);
+    var expected = flag(this, 'object')
+      , flagMsg = flag(this, 'message')
+      , ssfi = flag(this, 'ssfi');
+    new Assertion(list, flagMsg, ssfi, true).to.be.an('array');
+
+    this.assert(
+        list.indexOf(expected) > -1
+      , 'expected #{this} to be one of #{exp}'
+      , 'expected #{this} to not be one of #{exp}'
+      , list
+      , expected
+    );
+  }
+
+  Assertion.addMethod('oneOf', oneOf);
+
+  /**
+   * ### .change(subject[, prop[, msg]])
+   *
+   * When one argument is provided, `.change` asserts that the given function
+   * `subject` returns a different value when it's invoked before the target
+   * function compared to when it's invoked afterward. However, it's often best
+   * to assert that `subject` is equal to its expected value.
+   *
+   *     var dots = ''
+   *       , addDot = function () { dots += '.'; }
+   *       , getDots = function () { return dots; };
+   *
+   *     // Recommended
+   *     expect(getDots()).to.equal('');
+   *     addDot();
+   *     expect(getDots()).to.equal('.');
+   *
+   *     // Not recommended
+   *     expect(addDot).to.change(getDots);
+   *
+   * When two arguments are provided, `.change` asserts that the value of the
+   * given object `subject`'s `prop` property is different before invoking the
+   * target function compared to afterward.
+   *
+   *     var myObj = {dots: ''}
+   *       , addDot = function () { myObj.dots += '.'; };
+   *
+   *     // Recommended
+   *     expect(myObj).to.have.property('dots', '');
+   *     addDot();
+   *     expect(myObj).to.have.property('dots', '.');
+   *
+   *     // Not recommended
+   *     expect(addDot).to.change(myObj, 'dots');
+   *
+   * Strict (`===`) equality is used to compare before and after values.
+   *
+   * Add `.not` earlier in the chain to negate `.change`.
+   *
+   *     var dots = ''
+   *       , noop = function () {}
+   *       , getDots = function () { return dots; };
+   *
+   *     expect(noop).to.not.change(getDots);
+   *
+   *     var myObj = {dots: ''}
+   *       , noop = function () {};
+   *
+   *     expect(noop).to.not.change(myObj, 'dots');
+   *
+   * `.change` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`. When not providing two arguments, always
+   * use the second form.
+   *
+   *     var myObj = {dots: ''}
+   *       , addDot = function () { myObj.dots += '.'; };
+   *
+   *     expect(addDot).to.not.change(myObj, 'dots', 'nooo why fail??');
+   *
+   *     var dots = ''
+   *       , addDot = function () { dots += '.'; }
+   *       , getDots = function () { return dots; };
+   *
+   *     expect(addDot, 'nooo why fail??').to.not.change(getDots);
+   *
+   * `.change` also causes all `.by` assertions that follow in the chain to
+   * assert how much a numeric subject was increased or decreased by. However,
+   * it's dangerous to use `.change.by`. The problem is that it creates
+   * uncertain expectations by asserting that the subject either increases by
+   * the given delta, or that it decreases by the given delta. It's often best
+   * to identify the exact output that's expected, and then write an assertion
+   * that only accepts that exact output.
+   *
+   *     var myObj = {val: 1}
+   *       , addTwo = function () { myObj.val += 2; }
+   *       , subtractTwo = function () { myObj.val -= 2; };
+   *
+   *     expect(addTwo).to.increase(myObj, 'val').by(2); // Recommended
+   *     expect(addTwo).to.change(myObj, 'val').by(2); // Not recommended
+   *
+   *     expect(subtractTwo).to.decrease(myObj, 'val').by(2); // Recommended
+   *     expect(subtractTwo).to.change(myObj, 'val').by(2); // Not recommended
+   *
+   * The alias `.changes` can be used interchangeably with `.change`.
+   *
+   * @name change
+   * @alias changes
+   * @param {String} subject
+   * @param {String} prop name _optional_
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertChanges (subject, prop, msg) {
+    if (msg) flag(this, 'message', msg);
+    var fn = flag(this, 'object')
+      , flagMsg = flag(this, 'message')
+      , ssfi = flag(this, 'ssfi');
+    new Assertion(fn, flagMsg, ssfi, true).is.a('function');
+
+    var initial;
+    if (!prop) {
+      new Assertion(subject, flagMsg, ssfi, true).is.a('function');
+      initial = subject();
+    } else {
+      new Assertion(subject, flagMsg, ssfi, true).to.have.property(prop);
+      initial = subject[prop];
+    }
+
+    fn();
+
+    var final = prop === undefined || prop === null ? subject() : subject[prop];
+    var msgObj = prop === undefined || prop === null ? initial : '.' + prop;
+
+    // This gets flagged because of the .by(delta) assertion
+    flag(this, 'deltaMsgObj', msgObj);
+    flag(this, 'initialDeltaValue', initial);
+    flag(this, 'finalDeltaValue', final);
+    flag(this, 'deltaBehavior', 'change');
+    flag(this, 'realDelta', final !== initial);
+
+    this.assert(
+      initial !== final
+      , 'expected ' + msgObj + ' to change'
+      , 'expected ' + msgObj + ' to not change'
+    );
+  }
+
+  Assertion.addMethod('change', assertChanges);
+  Assertion.addMethod('changes', assertChanges);
+
+  /**
+   * ### .increase(subject[, prop[, msg]])
+   *
+   * When one argument is provided, `.increase` asserts that the given function
+   * `subject` returns a greater number when it's invoked after invoking the
+   * target function compared to when it's invoked beforehand. `.increase` also
+   * causes all `.by` assertions that follow in the chain to assert how much
+   * greater of a number is returned. It's often best to assert that the return
+   * value increased by the expected amount, rather than asserting it increased
+   * by any amount.
+   *
+   *     var val = 1
+   *       , addTwo = function () { val += 2; }
+   *       , getVal = function () { return val; };
+   *
+   *     expect(addTwo).to.increase(getVal).by(2); // Recommended
+   *     expect(addTwo).to.increase(getVal); // Not recommended
+   *
+   * When two arguments are provided, `.increase` asserts that the value of the
+   * given object `subject`'s `prop` property is greater after invoking the
+   * target function compared to beforehand.
+   *
+   *     var myObj = {val: 1}
+   *       , addTwo = function () { myObj.val += 2; };
+   *
+   *     expect(addTwo).to.increase(myObj, 'val').by(2); // Recommended
+   *     expect(addTwo).to.increase(myObj, 'val'); // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.increase`. However, it's
+   * dangerous to do so. The problem is that it creates uncertain expectations
+   * by asserting that the subject either decreases, or that it stays the same.
+   * It's often best to identify the exact output that's expected, and then
+   * write an assertion that only accepts that exact output.
+   *
+   * When the subject is expected to decrease, it's often best to assert that it
+   * decreased by the expected amount.
+   *
+   *     var myObj = {val: 1}
+   *       , subtractTwo = function () { myObj.val -= 2; };
+   *
+   *     expect(subtractTwo).to.decrease(myObj, 'val').by(2); // Recommended
+   *     expect(subtractTwo).to.not.increase(myObj, 'val'); // Not recommended
+   *
+   * When the subject is expected to stay the same, it's often best to assert
+   * exactly that.
+   *
+   *     var myObj = {val: 1}
+   *       , noop = function () {};
+   *
+   *     expect(noop).to.not.change(myObj, 'val'); // Recommended
+   *     expect(noop).to.not.increase(myObj, 'val'); // Not recommended
+   *
+   * `.increase` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`. When not providing two arguments, always
+   * use the second form.
+   *
+   *     var myObj = {val: 1}
+   *       , noop = function () {};
+   *
+   *     expect(noop).to.increase(myObj, 'val', 'nooo why fail??');
+   *
+   *     var val = 1
+   *       , noop = function () {}
+   *       , getVal = function () { return val; };
+   *
+   *     expect(noop, 'nooo why fail??').to.increase(getVal);
+   *
+   * The alias `.increases` can be used interchangeably with `.increase`.
+   *
+   * @name increase
+   * @alias increases
+   * @param {String|Function} subject
+   * @param {String} prop name _optional_
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertIncreases (subject, prop, msg) {
+    if (msg) flag(this, 'message', msg);
+    var fn = flag(this, 'object')
+      , flagMsg = flag(this, 'message')
+      , ssfi = flag(this, 'ssfi');
+    new Assertion(fn, flagMsg, ssfi, true).is.a('function');
+
+    var initial;
+    if (!prop) {
+      new Assertion(subject, flagMsg, ssfi, true).is.a('function');
+      initial = subject();
+    } else {
+      new Assertion(subject, flagMsg, ssfi, true).to.have.property(prop);
+      initial = subject[prop];
+    }
+
+    // Make sure that the target is a number
+    new Assertion(initial, flagMsg, ssfi, true).is.a('number');
+
+    fn();
+
+    var final = prop === undefined || prop === null ? subject() : subject[prop];
+    var msgObj = prop === undefined || prop === null ? initial : '.' + prop;
+
+    flag(this, 'deltaMsgObj', msgObj);
+    flag(this, 'initialDeltaValue', initial);
+    flag(this, 'finalDeltaValue', final);
+    flag(this, 'deltaBehavior', 'increase');
+    flag(this, 'realDelta', final - initial);
+
+    this.assert(
+      final - initial > 0
+      , 'expected ' + msgObj + ' to increase'
+      , 'expected ' + msgObj + ' to not increase'
+    );
+  }
+
+  Assertion.addMethod('increase', assertIncreases);
+  Assertion.addMethod('increases', assertIncreases);
+
+  /**
+   * ### .decrease(subject[, prop[, msg]])
+   *
+   * When one argument is provided, `.decrease` asserts that the given function
+   * `subject` returns a lesser number when it's invoked after invoking the
+   * target function compared to when it's invoked beforehand. `.decrease` also
+   * causes all `.by` assertions that follow in the chain to assert how much
+   * lesser of a number is returned. It's often best to assert that the return
+   * value decreased by the expected amount, rather than asserting it decreased
+   * by any amount.
+   *
+   *     var val = 1
+   *       , subtractTwo = function () { val -= 2; }
+   *       , getVal = function () { return val; };
+   *
+   *     expect(subtractTwo).to.decrease(getVal).by(2); // Recommended
+   *     expect(subtractTwo).to.decrease(getVal); // Not recommended
+   *
+   * When two arguments are provided, `.decrease` asserts that the value of the
+   * given object `subject`'s `prop` property is lesser after invoking the
+   * target function compared to beforehand.
+   *
+   *     var myObj = {val: 1}
+   *       , subtractTwo = function () { myObj.val -= 2; };
+   *
+   *     expect(subtractTwo).to.decrease(myObj, 'val').by(2); // Recommended
+   *     expect(subtractTwo).to.decrease(myObj, 'val'); // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.decrease`. However, it's
+   * dangerous to do so. The problem is that it creates uncertain expectations
+   * by asserting that the subject either increases, or that it stays the same.
+   * It's often best to identify the exact output that's expected, and then
+   * write an assertion that only accepts that exact output.
+   *
+   * When the subject is expected to increase, it's often best to assert that it
+   * increased by the expected amount.
+   *
+   *     var myObj = {val: 1}
+   *       , addTwo = function () { myObj.val += 2; };
+   *
+   *     expect(addTwo).to.increase(myObj, 'val').by(2); // Recommended
+   *     expect(addTwo).to.not.decrease(myObj, 'val'); // Not recommended
+   *
+   * When the subject is expected to stay the same, it's often best to assert
+   * exactly that.
+   *
+   *     var myObj = {val: 1}
+   *       , noop = function () {};
+   *
+   *     expect(noop).to.not.change(myObj, 'val'); // Recommended
+   *     expect(noop).to.not.decrease(myObj, 'val'); // Not recommended
+   *
+   * `.decrease` accepts an optional `msg` argument which is a custom error
+   * message to show when the assertion fails. The message can also be given as
+   * the second argument to `expect`. When not providing two arguments, always
+   * use the second form.
+   *
+   *     var myObj = {val: 1}
+   *       , noop = function () {};
+   *
+   *     expect(noop).to.decrease(myObj, 'val', 'nooo why fail??');
+   *
+   *     var val = 1
+   *       , noop = function () {}
+   *       , getVal = function () { return val; };
+   *
+   *     expect(noop, 'nooo why fail??').to.decrease(getVal);
+   *
+   * The alias `.decreases` can be used interchangeably with `.decrease`.
+   *
+   * @name decrease
+   * @alias decreases
+   * @param {String|Function} subject
+   * @param {String} prop name _optional_
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertDecreases (subject, prop, msg) {
+    if (msg) flag(this, 'message', msg);
+    var fn = flag(this, 'object')
+      , flagMsg = flag(this, 'message')
+      , ssfi = flag(this, 'ssfi');
+    new Assertion(fn, flagMsg, ssfi, true).is.a('function');
+
+    var initial;
+    if (!prop) {
+      new Assertion(subject, flagMsg, ssfi, true).is.a('function');
+      initial = subject();
+    } else {
+      new Assertion(subject, flagMsg, ssfi, true).to.have.property(prop);
+      initial = subject[prop];
+    }
+
+    // Make sure that the target is a number
+    new Assertion(initial, flagMsg, ssfi, true).is.a('number');
+
+    fn();
+
+    var final = prop === undefined || prop === null ? subject() : subject[prop];
+    var msgObj = prop === undefined || prop === null ? initial : '.' + prop;
+
+    flag(this, 'deltaMsgObj', msgObj);
+    flag(this, 'initialDeltaValue', initial);
+    flag(this, 'finalDeltaValue', final);
+    flag(this, 'deltaBehavior', 'decrease');
+    flag(this, 'realDelta', initial - final);
+
+    this.assert(
+      final - initial < 0
+      , 'expected ' + msgObj + ' to decrease'
+      , 'expected ' + msgObj + ' to not decrease'
+    );
+  }
+
+  Assertion.addMethod('decrease', assertDecreases);
+  Assertion.addMethod('decreases', assertDecreases);
+
+  /**
+   * ### .by(delta[, msg])
+   *
+   * When following an `.increase` assertion in the chain, `.by` asserts that
+   * the subject of the `.increase` assertion increased by the given `delta`.
+   *
+   *     var myObj = {val: 1}
+   *       , addTwo = function () { myObj.val += 2; };
+   *
+   *     expect(addTwo).to.increase(myObj, 'val').by(2);
+   *
+   * When following a `.decrease` assertion in the chain, `.by` asserts that the
+   * subject of the `.decrease` assertion decreased by the given `delta`.
+   *
+   *     var myObj = {val: 1}
+   *       , subtractTwo = function () { myObj.val -= 2; };
+   *
+   *     expect(subtractTwo).to.decrease(myObj, 'val').by(2);
+   *
+   * When following a `.change` assertion in the chain, `.by` asserts that the
+   * subject of the `.change` assertion either increased or decreased by the
+   * given `delta`. However, it's dangerous to use `.change.by`. The problem is
+   * that it creates uncertain expectations. It's often best to identify the
+   * exact output that's expected, and then write an assertion that only accepts
+   * that exact output.
+   *
+   *     var myObj = {val: 1}
+   *       , addTwo = function () { myObj.val += 2; }
+   *       , subtractTwo = function () { myObj.val -= 2; };
+   *
+   *     expect(addTwo).to.increase(myObj, 'val').by(2); // Recommended
+   *     expect(addTwo).to.change(myObj, 'val').by(2); // Not recommended
+   *
+   *     expect(subtractTwo).to.decrease(myObj, 'val').by(2); // Recommended
+   *     expect(subtractTwo).to.change(myObj, 'val').by(2); // Not recommended
+   *
+   * Add `.not` earlier in the chain to negate `.by`. However, it's often best
+   * to assert that the subject changed by its expected delta, rather than
+   * asserting that it didn't change by one of countless unexpected deltas.
+   *
+   *     var myObj = {val: 1}
+   *       , addTwo = function () { myObj.val += 2; };
+   *
+   *     // Recommended
+   *     expect(addTwo).to.increase(myObj, 'val').by(2);
+   *
+   *     // Not recommended
+   *     expect(addTwo).to.increase(myObj, 'val').but.not.by(3);
+   *
+   * `.by` accepts an optional `msg` argument which is a custom error message to
+   * show when the assertion fails. The message can also be given as the second
+   * argument to `expect`.
+   *
+   *     var myObj = {val: 1}
+   *       , addTwo = function () { myObj.val += 2; };
+   *
+   *     expect(addTwo).to.increase(myObj, 'val').by(3, 'nooo why fail??');
+   *     expect(addTwo, 'nooo why fail??').to.increase(myObj, 'val').by(3);
+   *
+   * @name by
+   * @param {Number} delta
+   * @param {String} msg _optional_
+   * @namespace BDD
+   * @api public
+   */
+
+  function assertDelta(delta, msg) {
+    if (msg) flag(this, 'message', msg);
+
+    var msgObj = flag(this, 'deltaMsgObj');
+    var initial = flag(this, 'initialDeltaValue');
+    var final = flag(this, 'finalDeltaValue');
+    var behavior = flag(this, 'deltaBehavior');
+    var realDelta = flag(this, 'realDelta');
+
+    var expression;
+    if (behavior === 'change') {
+      expression = Math.abs(final - initial) === Math.abs(delta);
+    } else {
+      expression = realDelta === Math.abs(delta);
+    }
+
+    this.assert(
+      expression
+      , 'expected ' + msgObj + ' to ' + behavior + ' by ' + delta
+      , 'expected ' + msgObj + ' to not ' + behavior + ' by ' + delta
+    );
+  }
+
+  Assertion.addMethod('by', assertDelta);
+
+  /**
+   * ### .extensible
+   *
+   * Asserts that the target is extensible, which means that new properties can
+   * be added to it. Primitives are never extensible.
+   *
+   *     expect({a: 1}).to.be.extensible;
+   *
+   * Add `.not` earlier in the chain to negate `.extensible`.
+   *
+   *     var nonExtensibleObject = Object.preventExtensions({})
+   *       , sealedObject = Object.seal({})
+   *       , frozenObject = Object.freeze({});
+   *
+   *     expect(nonExtensibleObject).to.not.be.extensible;
+   *     expect(sealedObject).to.not.be.extensible;
+   *     expect(frozenObject).to.not.be.extensible;
+   *     expect(1).to.not.be.extensible;
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect(1, 'nooo why fail??').to.be.extensible;
+   *
+   * @name extensible
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('extensible', function() {
+    var obj = flag(this, 'object');
+
+    // In ES5, if the argument to this method is a primitive, then it will cause a TypeError.
+    // In ES6, a non-object argument will be treated as if it was a non-extensible ordinary object, simply return false.
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isExtensible
+    // The following provides ES6 behavior for ES5 environments.
+
+    var isExtensible = obj === Object(obj) && Object.isExtensible(obj);
+
+    this.assert(
+      isExtensible
+      , 'expected #{this} to be extensible'
+      , 'expected #{this} to not be extensible'
+    );
+  });
+
+  /**
+   * ### .sealed
+   *
+   * Asserts that the target is sealed, which means that new properties can't be
+   * added to it, and its existing properties can't be reconfigured or deleted.
+   * However, it's possible that its existing properties can still be reassigned
+   * to different values. Primitives are always sealed.
+   *
+   *     var sealedObject = Object.seal({});
+   *     var frozenObject = Object.freeze({});
+   *
+   *     expect(sealedObject).to.be.sealed;
+   *     expect(frozenObject).to.be.sealed;
+   *     expect(1).to.be.sealed;
+   *
+   * Add `.not` earlier in the chain to negate `.sealed`.
+   *
+   *     expect({a: 1}).to.not.be.sealed;
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect({a: 1}, 'nooo why fail??').to.be.sealed;
+   *
+   * @name sealed
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('sealed', function() {
+    var obj = flag(this, 'object');
+
+    // In ES5, if the argument to this method is a primitive, then it will cause a TypeError.
+    // In ES6, a non-object argument will be treated as if it was a sealed ordinary object, simply return true.
+    // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isSealed
+    // The following provides ES6 behavior for ES5 environments.
+
+    var isSealed = obj === Object(obj) ? Object.isSealed(obj) : true;
+
+    this.assert(
+      isSealed
+      , 'expected #{this} to be sealed'
+      , 'expected #{this} to not be sealed'
+    );
+  });
+
+  /**
+   * ### .frozen
+   *
+   * Asserts that the target is frozen, which means that new properties can't be
+   * added to it, and its existing properties can't be reassigned to different
+   * values, reconfigured, or deleted. Primitives are always frozen.
+   *
+   *     var frozenObject = Object.freeze({});
+   *
+   *     expect(frozenObject).to.be.frozen;
+   *     expect(1).to.be.frozen;
+   *
+   * Add `.not` earlier in the chain to negate `.frozen`.
+   *
+   *     expect({a: 1}).to.not.be.frozen;
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect({a: 1}, 'nooo why fail??').to.be.frozen;
+   *
+   * @name frozen
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('frozen', function() {
+    var obj = flag(this, 'object');
+
+    // In ES5, if the argument to this method is a primitive, then it will cause a TypeError.
+    // In ES6, a non-object argument will be treated as if it was a frozen ordinary object, simply return true.
+    // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isFrozen
+    // The following provides ES6 behavior for ES5 environments.
+
+    var isFrozen = obj === Object(obj) ? Object.isFrozen(obj) : true;
+
+    this.assert(
+      isFrozen
+      , 'expected #{this} to be frozen'
+      , 'expected #{this} to not be frozen'
+    );
+  });
+
+  /**
+   * ### .finite
+   *
+   * Asserts that the target is a number, and isn't `NaN` or positive/negative
+   * `Infinity`.
+   *
+   *     expect(1).to.be.finite;
+   *
+   * Add `.not` earlier in the chain to negate `.finite`. However, it's
+   * dangerous to do so. The problem is that it creates uncertain expectations
+   * by asserting that the subject either isn't a number, or that it's `NaN`, or
+   * that it's positive `Infinity`, or that it's negative `Infinity`. It's often
+   * best to identify the exact output that's expected, and then write an
+   * assertion that only accepts that exact output.
+   *
+   * When the target isn't expected to be a number, it's often best to assert
+   * that it's the expected type, rather than asserting that it isn't one of
+   * many unexpected types.
+   *
+   *     expect('foo').to.be.a('string'); // Recommended
+   *     expect('foo').to.not.be.finite; // Not recommended
+   *
+   * When the target is expected to be `NaN`, it's often best to assert exactly
+   * that.
+   *
+   *     expect(NaN).to.be.NaN; // Recommended
+   *     expect(NaN).to.not.be.finite; // Not recommended
+   *
+   * When the target is expected to be positive infinity, it's often best to
+   * assert exactly that.
+   *
+   *     expect(Infinity).to.equal(Infinity); // Recommended
+   *     expect(Infinity).to.not.be.finite; // Not recommended
+   *
+   * When the target is expected to be negative infinity, it's often best to
+   * assert exactly that.
+   *
+   *     expect(-Infinity).to.equal(-Infinity); // Recommended
+   *     expect(-Infinity).to.not.be.finite; // Not recommended
+   *
+   * A custom error message can be given as the second argument to `expect`.
+   *
+   *     expect('foo', 'nooo why fail??').to.be.finite;
+   *
+   * @name finite
+   * @namespace BDD
+   * @api public
+   */
+
+  Assertion.addProperty('finite', function(msg) {
+    var obj = flag(this, 'object');
+
+    this.assert(
+        typeof obj === 'number' && isFinite(obj)
+      , 'expected #{this} to be a finite number'
+      , 'expected #{this} to not be a finite number'
+    );
+  });
+};
+
+},{}],6:[function(require,module,exports){
+/*!
+ * chai
+ * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+module.exports = function (chai, util) {
+  /*!
+   * Chai dependencies.
+   */
+
+  var Assertion = chai.Assertion
+    , flag = util.flag;
+
+  /*!
+   * Module export.
+   */
+
+  /**
+   * ### assert(expression, message)
+   *
+   * Write your own test expressions.
+   *
+   *     assert('foo' !== 'bar', 'foo is not bar');
+   *     assert(Array.isArray([]), 'empty arrays are arrays');
+   *
+   * @param {Mixed} expression to test for truthiness
+   * @param {String} message to display on error
+   * @name assert
+   * @namespace Assert
+   * @api public
+   */
+
+  var assert = chai.assert = function (express, errmsg) {
+    var test = new Assertion(null, null, chai.assert, true);
+    test.assert(
+        express
+      , errmsg
+      , '[ negation message unavailable ]'
+    );
+  };
+
+  /**
+   * ### .fail([message])
+   * ### .fail(actual, expected, [message], [operator])
+   *
+   * Throw a failure. Node.js `assert` module-compatible.
+   *
+   *     assert.fail();
+   *     assert.fail("custom error message");
+   *     assert.fail(1, 2);
+   *     assert.fail(1, 2, "custom error message");
+   *     assert.fail(1, 2, "custom error message", ">");
+   *     assert.fail(1, 2, undefined, ">");
+   *
+   * @name fail
+   * @param {Mixed} actual
+   * @param {Mixed} expected
+   * @param {String} message
+   * @param {String} operator
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.fail = function (actual, expected, message, operator) {
+    if (arguments.length < 2) {
+        // Comply with Node's fail([message]) interface
+
+        message = actual;
+        actual = undefined;
+    }
+
+    message = message || 'assert.fail()';
+    throw new chai.AssertionError(message, {
+        actual: actual
+      , expected: expected
+      , operator: operator
+    }, assert.fail);
+  };
+
+  /**
+   * ### .isOk(object, [message])
+   *
+   * Asserts that `object` is truthy.
+   *
+   *     assert.isOk('everything', 'everything is ok');
+   *     assert.isOk(false, 'this will fail');
+   *
+   * @name isOk
+   * @alias ok
+   * @param {Mixed} object to test
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isOk = function (val, msg) {
+    new Assertion(val, msg, assert.isOk, true).is.ok;
+  };
+
+  /**
+   * ### .isNotOk(object, [message])
+   *
+   * Asserts that `object` is falsy.
+   *
+   *     assert.isNotOk('everything', 'this will fail');
+   *     assert.isNotOk(false, 'this will pass');
+   *
+   * @name isNotOk
+   * @alias notOk
+   * @param {Mixed} object to test
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotOk = function (val, msg) {
+    new Assertion(val, msg, assert.isNotOk, true).is.not.ok;
+  };
+
+  /**
+   * ### .equal(actual, expected, [message])
+   *
+   * Asserts non-strict equality (`==`) of `actual` and `expected`.
+   *
+   *     assert.equal(3, '3', '== coerces values to strings');
+   *
+   * @name equal
+   * @param {Mixed} actual
+   * @param {Mixed} expected
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.equal = function (act, exp, msg) {
+    var test = new Assertion(act, msg, assert.equal, true);
+
+    test.assert(
+        exp == flag(test, 'object')
+      , 'expected #{this} to equal #{exp}'
+      , 'expected #{this} to not equal #{act}'
+      , exp
+      , act
+      , true
+    );
+  };
+
+  /**
+   * ### .notEqual(actual, expected, [message])
+   *
+   * Asserts non-strict inequality (`!=`) of `actual` and `expected`.
+   *
+   *     assert.notEqual(3, 4, 'these numbers are not equal');
+   *
+   * @name notEqual
+   * @param {Mixed} actual
+   * @param {Mixed} expected
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notEqual = function (act, exp, msg) {
+    var test = new Assertion(act, msg, assert.notEqual, true);
+
+    test.assert(
+        exp != flag(test, 'object')
+      , 'expected #{this} to not equal #{exp}'
+      , 'expected #{this} to equal #{act}'
+      , exp
+      , act
+      , true
+    );
+  };
+
+  /**
+   * ### .strictEqual(actual, expected, [message])
+   *
+   * Asserts strict equality (`===`) of `actual` and `expected`.
+   *
+   *     assert.strictEqual(true, true, 'these booleans are strictly equal');
+   *
+   * @name strictEqual
+   * @param {Mixed} actual
+   * @param {Mixed} expected
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.strictEqual = function (act, exp, msg) {
+    new Assertion(act, msg, assert.strictEqual, true).to.equal(exp);
+  };
+
+  /**
+   * ### .notStrictEqual(actual, expected, [message])
+   *
+   * Asserts strict inequality (`!==`) of `actual` and `expected`.
+   *
+   *     assert.notStrictEqual(3, '3', 'no coercion for strict equality');
+   *
+   * @name notStrictEqual
+   * @param {Mixed} actual
+   * @param {Mixed} expected
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notStrictEqual = function (act, exp, msg) {
+    new Assertion(act, msg, assert.notStrictEqual, true).to.not.equal(exp);
+  };
+
+  /**
+   * ### .deepEqual(actual, expected, [message])
+   *
+   * Asserts that `actual` is deeply equal to `expected`.
+   *
+   *     assert.deepEqual({ tea: 'green' }, { tea: 'green' });
+   *
+   * @name deepEqual
+   * @param {Mixed} actual
+   * @param {Mixed} expected
+   * @param {String} message
+   * @alias deepStrictEqual
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.deepEqual = assert.deepStrictEqual = function (act, exp, msg) {
+    new Assertion(act, msg, assert.deepEqual, true).to.eql(exp);
+  };
+
+  /**
+   * ### .notDeepEqual(actual, expected, [message])
+   *
+   * Assert that `actual` is not deeply equal to `expected`.
+   *
+   *     assert.notDeepEqual({ tea: 'green' }, { tea: 'jasmine' });
+   *
+   * @name notDeepEqual
+   * @param {Mixed} actual
+   * @param {Mixed} expected
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notDeepEqual = function (act, exp, msg) {
+    new Assertion(act, msg, assert.notDeepEqual, true).to.not.eql(exp);
+  };
+
+   /**
+   * ### .isAbove(valueToCheck, valueToBeAbove, [message])
+   *
+   * Asserts `valueToCheck` is strictly greater than (>) `valueToBeAbove`.
+   *
+   *     assert.isAbove(5, 2, '5 is strictly greater than 2');
+   *
+   * @name isAbove
+   * @param {Mixed} valueToCheck
+   * @param {Mixed} valueToBeAbove
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isAbove = function (val, abv, msg) {
+    new Assertion(val, msg, assert.isAbove, true).to.be.above(abv);
+  };
+
+   /**
+   * ### .isAtLeast(valueToCheck, valueToBeAtLeast, [message])
+   *
+   * Asserts `valueToCheck` is greater than or equal to (>=) `valueToBeAtLeast`.
+   *
+   *     assert.isAtLeast(5, 2, '5 is greater or equal to 2');
+   *     assert.isAtLeast(3, 3, '3 is greater or equal to 3');
+   *
+   * @name isAtLeast
+   * @param {Mixed} valueToCheck
+   * @param {Mixed} valueToBeAtLeast
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isAtLeast = function (val, atlst, msg) {
+    new Assertion(val, msg, assert.isAtLeast, true).to.be.least(atlst);
+  };
+
+   /**
+   * ### .isBelow(valueToCheck, valueToBeBelow, [message])
+   *
+   * Asserts `valueToCheck` is strictly less than (<) `valueToBeBelow`.
+   *
+   *     assert.isBelow(3, 6, '3 is strictly less than 6');
+   *
+   * @name isBelow
+   * @param {Mixed} valueToCheck
+   * @param {Mixed} valueToBeBelow
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isBelow = function (val, blw, msg) {
+    new Assertion(val, msg, assert.isBelow, true).to.be.below(blw);
+  };
+
+   /**
+   * ### .isAtMost(valueToCheck, valueToBeAtMost, [message])
+   *
+   * Asserts `valueToCheck` is less than or equal to (<=) `valueToBeAtMost`.
+   *
+   *     assert.isAtMost(3, 6, '3 is less than or equal to 6');
+   *     assert.isAtMost(4, 4, '4 is less than or equal to 4');
+   *
+   * @name isAtMost
+   * @param {Mixed} valueToCheck
+   * @param {Mixed} valueToBeAtMost
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isAtMost = function (val, atmst, msg) {
+    new Assertion(val, msg, assert.isAtMost, true).to.be.most(atmst);
+  };
+
+  /**
+   * ### .isTrue(value, [message])
+   *
+   * Asserts that `value` is true.
+   *
+   *     var teaServed = true;
+   *     assert.isTrue(teaServed, 'the tea has been served');
+   *
+   * @name isTrue
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isTrue = function (val, msg) {
+    new Assertion(val, msg, assert.isTrue, true).is['true'];
+  };
+
+  /**
+   * ### .isNotTrue(value, [message])
+   *
+   * Asserts that `value` is not true.
+   *
+   *     var tea = 'tasty chai';
+   *     assert.isNotTrue(tea, 'great, time for tea!');
+   *
+   * @name isNotTrue
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotTrue = function (val, msg) {
+    new Assertion(val, msg, assert.isNotTrue, true).to.not.equal(true);
+  };
+
+  /**
+   * ### .isFalse(value, [message])
+   *
+   * Asserts that `value` is false.
+   *
+   *     var teaServed = false;
+   *     assert.isFalse(teaServed, 'no tea yet? hmm...');
+   *
+   * @name isFalse
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isFalse = function (val, msg) {
+    new Assertion(val, msg, assert.isFalse, true).is['false'];
+  };
+
+  /**
+   * ### .isNotFalse(value, [message])
+   *
+   * Asserts that `value` is not false.
+   *
+   *     var tea = 'tasty chai';
+   *     assert.isNotFalse(tea, 'great, time for tea!');
+   *
+   * @name isNotFalse
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotFalse = function (val, msg) {
+    new Assertion(val, msg, assert.isNotFalse, true).to.not.equal(false);
+  };
+
+  /**
+   * ### .isNull(value, [message])
+   *
+   * Asserts that `value` is null.
+   *
+   *     assert.isNull(err, 'there was no error');
+   *
+   * @name isNull
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNull = function (val, msg) {
+    new Assertion(val, msg, assert.isNull, true).to.equal(null);
+  };
+
+  /**
+   * ### .isNotNull(value, [message])
+   *
+   * Asserts that `value` is not null.
+   *
+   *     var tea = 'tasty chai';
+   *     assert.isNotNull(tea, 'great, time for tea!');
+   *
+   * @name isNotNull
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotNull = function (val, msg) {
+    new Assertion(val, msg, assert.isNotNull, true).to.not.equal(null);
+  };
+
+  /**
+   * ### .isNaN
+   *
+   * Asserts that value is NaN.
+   *
+   *     assert.isNaN(NaN, 'NaN is NaN');
+   *
+   * @name isNaN
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNaN = function (val, msg) {
+    new Assertion(val, msg, assert.isNaN, true).to.be.NaN;
+  };
+
+  /**
+   * ### .isNotNaN
+   *
+   * Asserts that value is not NaN.
+   *
+   *     assert.isNotNaN(4, '4 is not NaN');
+   *
+   * @name isNotNaN
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+  assert.isNotNaN = function (val, msg) {
+    new Assertion(val, msg, assert.isNotNaN, true).not.to.be.NaN;
+  };
+
+  /**
+   * ### .exists
+   *
+   * Asserts that the target is neither `null` nor `undefined`.
+   *
+   *     var foo = 'hi';
+   *
+   *     assert.exists(foo, 'foo is neither `null` nor `undefined`');
+   *
+   * @name exists
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.exists = function (val, msg) {
+    new Assertion(val, msg, assert.exists, true).to.exist;
+  };
+
+  /**
+   * ### .notExists
+   *
+   * Asserts that the target is either `null` or `undefined`.
+   *
+   *     var bar = null
+   *       , baz;
+   *
+   *     assert.notExists(bar);
+   *     assert.notExists(baz, 'baz is either null or undefined');
+   *
+   * @name notExists
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notExists = function (val, msg) {
+    new Assertion(val, msg, assert.notExists, true).to.not.exist;
+  };
+
+  /**
+   * ### .isUndefined(value, [message])
+   *
+   * Asserts that `value` is `undefined`.
+   *
+   *     var tea;
+   *     assert.isUndefined(tea, 'no tea defined');
+   *
+   * @name isUndefined
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isUndefined = function (val, msg) {
+    new Assertion(val, msg, assert.isUndefined, true).to.equal(undefined);
+  };
+
+  /**
+   * ### .isDefined(value, [message])
+   *
+   * Asserts that `value` is not `undefined`.
+   *
+   *     var tea = 'cup of chai';
+   *     assert.isDefined(tea, 'tea has been defined');
+   *
+   * @name isDefined
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isDefined = function (val, msg) {
+    new Assertion(val, msg, assert.isDefined, true).to.not.equal(undefined);
+  };
+
+  /**
+   * ### .isFunction(value, [message])
+   *
+   * Asserts that `value` is a function.
+   *
+   *     function serveTea() { return 'cup of tea'; };
+   *     assert.isFunction(serveTea, 'great, we can have tea now');
+   *
+   * @name isFunction
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isFunction = function (val, msg) {
+    new Assertion(val, msg, assert.isFunction, true).to.be.a('function');
+  };
+
+  /**
+   * ### .isNotFunction(value, [message])
+   *
+   * Asserts that `value` is _not_ a function.
+   *
+   *     var serveTea = [ 'heat', 'pour', 'sip' ];
+   *     assert.isNotFunction(serveTea, 'great, we have listed the steps');
+   *
+   * @name isNotFunction
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotFunction = function (val, msg) {
+    new Assertion(val, msg, assert.isNotFunction, true).to.not.be.a('function');
+  };
+
+  /**
+   * ### .isObject(value, [message])
+   *
+   * Asserts that `value` is an object of type 'Object' (as revealed by `Object.prototype.toString`).
+   * _The assertion does not match subclassed objects._
+   *
+   *     var selection = { name: 'Chai', serve: 'with spices' };
+   *     assert.isObject(selection, 'tea selection is an object');
+   *
+   * @name isObject
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isObject = function (val, msg) {
+    new Assertion(val, msg, assert.isObject, true).to.be.a('object');
+  };
+
+  /**
+   * ### .isNotObject(value, [message])
+   *
+   * Asserts that `value` is _not_ an object of type 'Object' (as revealed by `Object.prototype.toString`).
+   *
+   *     var selection = 'chai'
+   *     assert.isNotObject(selection, 'tea selection is not an object');
+   *     assert.isNotObject(null, 'null is not an object');
+   *
+   * @name isNotObject
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotObject = function (val, msg) {
+    new Assertion(val, msg, assert.isNotObject, true).to.not.be.a('object');
+  };
+
+  /**
+   * ### .isArray(value, [message])
+   *
+   * Asserts that `value` is an array.
+   *
+   *     var menu = [ 'green', 'chai', 'oolong' ];
+   *     assert.isArray(menu, 'what kind of tea do we want?');
+   *
+   * @name isArray
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isArray = function (val, msg) {
+    new Assertion(val, msg, assert.isArray, true).to.be.an('array');
+  };
+
+  /**
+   * ### .isNotArray(value, [message])
+   *
+   * Asserts that `value` is _not_ an array.
+   *
+   *     var menu = 'green|chai|oolong';
+   *     assert.isNotArray(menu, 'what kind of tea do we want?');
+   *
+   * @name isNotArray
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotArray = function (val, msg) {
+    new Assertion(val, msg, assert.isNotArray, true).to.not.be.an('array');
+  };
+
+  /**
+   * ### .isString(value, [message])
+   *
+   * Asserts that `value` is a string.
+   *
+   *     var teaOrder = 'chai';
+   *     assert.isString(teaOrder, 'order placed');
+   *
+   * @name isString
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isString = function (val, msg) {
+    new Assertion(val, msg, assert.isString, true).to.be.a('string');
+  };
+
+  /**
+   * ### .isNotString(value, [message])
+   *
+   * Asserts that `value` is _not_ a string.
+   *
+   *     var teaOrder = 4;
+   *     assert.isNotString(teaOrder, 'order placed');
+   *
+   * @name isNotString
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotString = function (val, msg) {
+    new Assertion(val, msg, assert.isNotString, true).to.not.be.a('string');
+  };
+
+  /**
+   * ### .isNumber(value, [message])
+   *
+   * Asserts that `value` is a number.
+   *
+   *     var cups = 2;
+   *     assert.isNumber(cups, 'how many cups');
+   *
+   * @name isNumber
+   * @param {Number} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNumber = function (val, msg) {
+    new Assertion(val, msg, assert.isNumber, true).to.be.a('number');
+  };
+
+  /**
+   * ### .isNotNumber(value, [message])
+   *
+   * Asserts that `value` is _not_ a number.
+   *
+   *     var cups = '2 cups please';
+   *     assert.isNotNumber(cups, 'how many cups');
+   *
+   * @name isNotNumber
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotNumber = function (val, msg) {
+    new Assertion(val, msg, assert.isNotNumber, true).to.not.be.a('number');
+  };
+
+   /**
+   * ### .isFinite(value, [message])
+   *
+   * Asserts that `value` is a finite number. Unlike `.isNumber`, this will fail for `NaN` and `Infinity`.
+   *
+   *     var cups = 2;
+   *     assert.isFinite(cups, 'how many cups');
+   *
+   *     assert.isFinite(NaN); // throws
+   *
+   * @name isFinite
+   * @param {Number} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isFinite = function (val, msg) {
+    new Assertion(val, msg, assert.isFinite, true).to.be.finite;
+  };
+
+  /**
+   * ### .isBoolean(value, [message])
+   *
+   * Asserts that `value` is a boolean.
+   *
+   *     var teaReady = true
+   *       , teaServed = false;
+   *
+   *     assert.isBoolean(teaReady, 'is the tea ready');
+   *     assert.isBoolean(teaServed, 'has tea been served');
+   *
+   * @name isBoolean
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isBoolean = function (val, msg) {
+    new Assertion(val, msg, assert.isBoolean, true).to.be.a('boolean');
+  };
+
+  /**
+   * ### .isNotBoolean(value, [message])
+   *
+   * Asserts that `value` is _not_ a boolean.
+   *
+   *     var teaReady = 'yep'
+   *       , teaServed = 'nope';
+   *
+   *     assert.isNotBoolean(teaReady, 'is the tea ready');
+   *     assert.isNotBoolean(teaServed, 'has tea been served');
+   *
+   * @name isNotBoolean
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotBoolean = function (val, msg) {
+    new Assertion(val, msg, assert.isNotBoolean, true).to.not.be.a('boolean');
+  };
+
+  /**
+   * ### .typeOf(value, name, [message])
+   *
+   * Asserts that `value`'s type is `name`, as determined by
+   * `Object.prototype.toString`.
+   *
+   *     assert.typeOf({ tea: 'chai' }, 'object', 'we have an object');
+   *     assert.typeOf(['chai', 'jasmine'], 'array', 'we have an array');
+   *     assert.typeOf('tea', 'string', 'we have a string');
+   *     assert.typeOf(/tea/, 'regexp', 'we have a regular expression');
+   *     assert.typeOf(null, 'null', 'we have a null');
+   *     assert.typeOf(undefined, 'undefined', 'we have an undefined');
+   *
+   * @name typeOf
+   * @param {Mixed} value
+   * @param {String} name
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.typeOf = function (val, type, msg) {
+    new Assertion(val, msg, assert.typeOf, true).to.be.a(type);
+  };
+
+  /**
+   * ### .notTypeOf(value, name, [message])
+   *
+   * Asserts that `value`'s type is _not_ `name`, as determined by
+   * `Object.prototype.toString`.
+   *
+   *     assert.notTypeOf('tea', 'number', 'strings are not numbers');
+   *
+   * @name notTypeOf
+   * @param {Mixed} value
+   * @param {String} typeof name
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notTypeOf = function (val, type, msg) {
+    new Assertion(val, msg, assert.notTypeOf, true).to.not.be.a(type);
+  };
+
+  /**
+   * ### .instanceOf(object, constructor, [message])
+   *
+   * Asserts that `value` is an instance of `constructor`.
+   *
+   *     var Tea = function (name) { this.name = name; }
+   *       , chai = new Tea('chai');
+   *
+   *     assert.instanceOf(chai, Tea, 'chai is an instance of tea');
+   *
+   * @name instanceOf
+   * @param {Object} object
+   * @param {Constructor} constructor
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.instanceOf = function (val, type, msg) {
+    new Assertion(val, msg, assert.instanceOf, true).to.be.instanceOf(type);
+  };
+
+  /**
+   * ### .notInstanceOf(object, constructor, [message])
+   *
+   * Asserts `value` is not an instance of `constructor`.
+   *
+   *     var Tea = function (name) { this.name = name; }
+   *       , chai = new String('chai');
+   *
+   *     assert.notInstanceOf(chai, Tea, 'chai is not an instance of tea');
+   *
+   * @name notInstanceOf
+   * @param {Object} object
+   * @param {Constructor} constructor
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notInstanceOf = function (val, type, msg) {
+    new Assertion(val, msg, assert.notInstanceOf, true)
+      .to.not.be.instanceOf(type);
+  };
+
+  /**
+   * ### .include(haystack, needle, [message])
+   *
+   * Asserts that `haystack` includes `needle`. Can be used to assert the
+   * inclusion of a value in an array, a substring in a string, or a subset of
+   * properties in an object.
+   *
+   *     assert.include([1,2,3], 2, 'array contains value');
+   *     assert.include('foobar', 'foo', 'string contains substring');
+   *     assert.include({ foo: 'bar', hello: 'universe' }, { foo: 'bar' }, 'object contains property');
+   *
+   * Strict equality (===) is used. When asserting the inclusion of a value in
+   * an array, the array is searched for an element that's strictly equal to the
+   * given value. When asserting a subset of properties in an object, the object
+   * is searched for the given property keys, checking that each one is present
+   * and strictly equal to the given property value. For instance:
+   *
+   *     var obj1 = {a: 1}
+   *       , obj2 = {b: 2};
+   *     assert.include([obj1, obj2], obj1);
+   *     assert.include({foo: obj1, bar: obj2}, {foo: obj1});
+   *     assert.include({foo: obj1, bar: obj2}, {foo: obj1, bar: obj2});
+   *
+   * @name include
+   * @param {Array|String} haystack
+   * @param {Mixed} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.include = function (exp, inc, msg) {
+    new Assertion(exp, msg, assert.include, true).include(inc);
+  };
+
+  /**
+   * ### .notInclude(haystack, needle, [message])
+   *
+   * Asserts that `haystack` does not include `needle`. Can be used to assert
+   * the absence of a value in an array, a substring in a string, or a subset of
+   * properties in an object.
+   *
+   *     assert.notInclude([1,2,3], 4, "array doesn't contain value");
+   *     assert.notInclude('foobar', 'baz', "string doesn't contain substring");
+   *     assert.notInclude({ foo: 'bar', hello: 'universe' }, { foo: 'baz' }, 'object doesn't contain property');
+   *
+   * Strict equality (===) is used. When asserting the absence of a value in an
+   * array, the array is searched to confirm the absence of an element that's
+   * strictly equal to the given value. When asserting a subset of properties in
+   * an object, the object is searched to confirm that at least one of the given
+   * property keys is either not present or not strictly equal to the given
+   * property value. For instance:
+   *
+   *     var obj1 = {a: 1}
+   *       , obj2 = {b: 2};
+   *     assert.notInclude([obj1, obj2], {a: 1});
+   *     assert.notInclude({foo: obj1, bar: obj2}, {foo: {a: 1}});
+   *     assert.notInclude({foo: obj1, bar: obj2}, {foo: obj1, bar: {b: 2}});
+   *
+   * @name notInclude
+   * @param {Array|String} haystack
+   * @param {Mixed} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notInclude = function (exp, inc, msg) {
+    new Assertion(exp, msg, assert.notInclude, true).not.include(inc);
+  };
+
+  /**
+   * ### .deepInclude(haystack, needle, [message])
+   *
+   * Asserts that `haystack` includes `needle`. Can be used to assert the
+   * inclusion of a value in an array or a subset of properties in an object.
+   * Deep equality is used.
+   *
+   *     var obj1 = {a: 1}
+   *       , obj2 = {b: 2};
+   *     assert.deepInclude([obj1, obj2], {a: 1});
+   *     assert.deepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}});
+   *     assert.deepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}, bar: {b: 2}});
+   *
+   * @name deepInclude
+   * @param {Array|String} haystack
+   * @param {Mixed} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.deepInclude = function (exp, inc, msg) {
+    new Assertion(exp, msg, assert.deepInclude, true).deep.include(inc);
+  };
+
+  /**
+   * ### .notDeepInclude(haystack, needle, [message])
+   *
+   * Asserts that `haystack` does not include `needle`. Can be used to assert
+   * the absence of a value in an array or a subset of properties in an object.
+   * Deep equality is used.
+   *
+   *     var obj1 = {a: 1}
+   *       , obj2 = {b: 2};
+   *     assert.notDeepInclude([obj1, obj2], {a: 9});
+   *     assert.notDeepInclude({foo: obj1, bar: obj2}, {foo: {a: 9}});
+   *     assert.notDeepInclude({foo: obj1, bar: obj2}, {foo: {a: 1}, bar: {b: 9}});
+   *
+   * @name notDeepInclude
+   * @param {Array|String} haystack
+   * @param {Mixed} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notDeepInclude = function (exp, inc, msg) {
+    new Assertion(exp, msg, assert.notDeepInclude, true).not.deep.include(inc);
+  };
+
+  /**
+   * ### .nestedInclude(haystack, needle, [message])
+   *
+   * Asserts that 'haystack' includes 'needle'.
+   * Can be used to assert the inclusion of a subset of properties in an
+   * object.
+   * Enables the use of dot- and bracket-notation for referencing nested
+   * properties.
+   * '[]' and '.' in property names can be escaped using double backslashes.
+   *
+   *     assert.nestedInclude({'.a': {'b': 'x'}}, {'\\.a.[b]': 'x'});
+   *     assert.nestedInclude({'a': {'[b]': 'x'}}, {'a.\\[b\\]': 'x'});
+   *
+   * @name nestedInclude
+   * @param {Object} haystack
+   * @param {Object} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.nestedInclude = function (exp, inc, msg) {
+    new Assertion(exp, msg, assert.nestedInclude, true).nested.include(inc);
+  };
+
+  /**
+   * ### .notNestedInclude(haystack, needle, [message])
+   *
+   * Asserts that 'haystack' does not include 'needle'.
+   * Can be used to assert the absence of a subset of properties in an
+   * object.
+   * Enables the use of dot- and bracket-notation for referencing nested
+   * properties.
+   * '[]' and '.' in property names can be escaped using double backslashes.
+   *
+   *     assert.notNestedInclude({'.a': {'b': 'x'}}, {'\\.a.b': 'y'});
+   *     assert.notNestedInclude({'a': {'[b]': 'x'}}, {'a.\\[b\\]': 'y'});
+   *
+   * @name notNestedInclude
+   * @param {Object} haystack
+   * @param {Object} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notNestedInclude = function (exp, inc, msg) {
+    new Assertion(exp, msg, assert.notNestedInclude, true)
+      .not.nested.include(inc);
+  };
+
+  /**
+   * ### .deepNestedInclude(haystack, needle, [message])
+   *
+   * Asserts that 'haystack' includes 'needle'.
+   * Can be used to assert the inclusion of a subset of properties in an
+   * object while checking for deep equality.
+   * Enables the use of dot- and bracket-notation for referencing nested
+   * properties.
+   * '[]' and '.' in property names can be escaped using double backslashes.
+   *
+   *     assert.deepNestedInclude({a: {b: [{x: 1}]}}, {'a.b[0]': {x: 1}});
+   *     assert.deepNestedInclude({'.a': {'[b]': {x: 1}}}, {'\\.a.\\[b\\]': {x: 1}});
+   *
+   * @name deepNestedInclude
+   * @param {Object} haystack
+   * @param {Object} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.deepNestedInclude = function(exp, inc, msg) {
+    new Assertion(exp, msg, assert.deepNestedInclude, true)
+      .deep.nested.include(inc);
+  };
+
+  /**
+   * ### .notDeepNestedInclude(haystack, needle, [message])
+   *
+   * Asserts that 'haystack' does not include 'needle'.
+   * Can be used to assert the absence of a subset of properties in an
+   * object while checking for deep equality.
+   * Enables the use of dot- and bracket-notation for referencing nested
+   * properties.
+   * '[]' and '.' in property names can be escaped using double backslashes.
+   *
+   *     assert.notDeepNestedInclude({a: {b: [{x: 1}]}}, {'a.b[0]': {y: 1}})
+   *     assert.notDeepNestedInclude({'.a': {'[b]': {x: 1}}}, {'\\.a.\\[b\\]': {y: 2}});
+   *
+   * @name notDeepNestedInclude
+   * @param {Object} haystack
+   * @param {Object} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notDeepNestedInclude = function(exp, inc, msg) {
+    new Assertion(exp, msg, assert.notDeepNestedInclude, true)
+      .not.deep.nested.include(inc);
+  };
+
+  /**
+   * ### .ownInclude(haystack, needle, [message])
+   *
+   * Asserts that 'haystack' includes 'needle'.
+   * Can be used to assert the inclusion of a subset of properties in an
+   * object while ignoring inherited properties.
+   *
+   *     assert.ownInclude({ a: 1 }, { a: 1 });
+   *
+   * @name ownInclude
+   * @param {Object} haystack
+   * @param {Object} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.ownInclude = function(exp, inc, msg) {
+    new Assertion(exp, msg, assert.ownInclude, true).own.include(inc);
+  };
+
+  /**
+   * ### .notOwnInclude(haystack, needle, [message])
+   *
+   * Asserts that 'haystack' includes 'needle'.
+   * Can be used to assert the absence of a subset of properties in an
+   * object while ignoring inherited properties.
+   *
+   *     Object.prototype.b = 2;
+   *
+   *     assert.notOwnInclude({ a: 1 }, { b: 2 });
+   *
+   * @name notOwnInclude
+   * @param {Object} haystack
+   * @param {Object} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notOwnInclude = function(exp, inc, msg) {
+    new Assertion(exp, msg, assert.notOwnInclude, true).not.own.include(inc);
+  };
+
+  /**
+   * ### .deepOwnInclude(haystack, needle, [message])
+   *
+   * Asserts that 'haystack' includes 'needle'.
+   * Can be used to assert the inclusion of a subset of properties in an
+   * object while ignoring inherited properties and checking for deep equality.
+   *
+   *      assert.deepOwnInclude({a: {b: 2}}, {a: {b: 2}});
+   *
+   * @name deepOwnInclude
+   * @param {Object} haystack
+   * @param {Object} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.deepOwnInclude = function(exp, inc, msg) {
+    new Assertion(exp, msg, assert.deepOwnInclude, true)
+      .deep.own.include(inc);
+  };
+
+   /**
+   * ### .notDeepOwnInclude(haystack, needle, [message])
+   *
+   * Asserts that 'haystack' includes 'needle'.
+   * Can be used to assert the absence of a subset of properties in an
+   * object while ignoring inherited properties and checking for deep equality.
+   *
+   *      assert.notDeepOwnInclude({a: {b: 2}}, {a: {c: 3}});
+   *
+   * @name notDeepOwnInclude
+   * @param {Object} haystack
+   * @param {Object} needle
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notDeepOwnInclude = function(exp, inc, msg) {
+    new Assertion(exp, msg, assert.notDeepOwnInclude, true)
+      .not.deep.own.include(inc);
+  };
+
+  /**
+   * ### .match(value, regexp, [message])
+   *
+   * Asserts that `value` matches the regular expression `regexp`.
+   *
+   *     assert.match('foobar', /^foo/, 'regexp matches');
+   *
+   * @name match
+   * @param {Mixed} value
+   * @param {RegExp} regexp
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.match = function (exp, re, msg) {
+    new Assertion(exp, msg, assert.match, true).to.match(re);
+  };
+
+  /**
+   * ### .notMatch(value, regexp, [message])
+   *
+   * Asserts that `value` does not match the regular expression `regexp`.
+   *
+   *     assert.notMatch('foobar', /^foo/, 'regexp does not match');
+   *
+   * @name notMatch
+   * @param {Mixed} value
+   * @param {RegExp} regexp
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notMatch = function (exp, re, msg) {
+    new Assertion(exp, msg, assert.notMatch, true).to.not.match(re);
+  };
+
+  /**
+   * ### .property(object, property, [message])
+   *
+   * Asserts that `object` has a direct or inherited property named by
+   * `property`.
+   *
+   *     assert.property({ tea: { green: 'matcha' }}, 'tea');
+   *     assert.property({ tea: { green: 'matcha' }}, 'toString');
+   *
+   * @name property
+   * @param {Object} object
+   * @param {String} property
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.property = function (obj, prop, msg) {
+    new Assertion(obj, msg, assert.property, true).to.have.property(prop);
+  };
+
+  /**
+   * ### .notProperty(object, property, [message])
+   *
+   * Asserts that `object` does _not_ have a direct or inherited property named
+   * by `property`.
+   *
+   *     assert.notProperty({ tea: { green: 'matcha' }}, 'coffee');
+   *
+   * @name notProperty
+   * @param {Object} object
+   * @param {String} property
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notProperty = function (obj, prop, msg) {
+    new Assertion(obj, msg, assert.notProperty, true)
+      .to.not.have.property(prop);
+  };
+
+  /**
+   * ### .propertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` has a direct or inherited property named by
+   * `property` with a value given by `value`. Uses a strict equality check
+   * (===).
+   *
+   *     assert.propertyVal({ tea: 'is good' }, 'tea', 'is good');
+   *
+   * @name propertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.propertyVal = function (obj, prop, val, msg) {
+    new Assertion(obj, msg, assert.propertyVal, true)
+      .to.have.property(prop, val);
+  };
+
+  /**
+   * ### .notPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` does _not_ have a direct or inherited property named
+   * by `property` with value given by `value`. Uses a strict equality check
+   * (===).
+   *
+   *     assert.notPropertyVal({ tea: 'is good' }, 'tea', 'is bad');
+   *     assert.notPropertyVal({ tea: 'is good' }, 'coffee', 'is good');
+   *
+   * @name notPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notPropertyVal = function (obj, prop, val, msg) {
+    new Assertion(obj, msg, assert.notPropertyVal, true)
+      .to.not.have.property(prop, val);
+  };
+
+  /**
+   * ### .deepPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` has a direct or inherited property named by
+   * `property` with a value given by `value`. Uses a deep equality check.
+   *
+   *     assert.deepPropertyVal({ tea: { green: 'matcha' } }, 'tea', { green: 'matcha' });
+   *
+   * @name deepPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.deepPropertyVal = function (obj, prop, val, msg) {
+    new Assertion(obj, msg, assert.deepPropertyVal, true)
+      .to.have.deep.property(prop, val);
+  };
+
+  /**
+   * ### .notDeepPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` does _not_ have a direct or inherited property named
+   * by `property` with value given by `value`. Uses a deep equality check.
+   *
+   *     assert.notDeepPropertyVal({ tea: { green: 'matcha' } }, 'tea', { black: 'matcha' });
+   *     assert.notDeepPropertyVal({ tea: { green: 'matcha' } }, 'tea', { green: 'oolong' });
+   *     assert.notDeepPropertyVal({ tea: { green: 'matcha' } }, 'coffee', { green: 'matcha' });
+   *
+   * @name notDeepPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notDeepPropertyVal = function (obj, prop, val, msg) {
+    new Assertion(obj, msg, assert.notDeepPropertyVal, true)
+      .to.not.have.deep.property(prop, val);
+  };
+
+  /**
+   * ### .ownProperty(object, property, [message])
+   *
+   * Asserts that `object` has a direct property named by `property`. Inherited
+   * properties aren't checked.
+   *
+   *     assert.ownProperty({ tea: { green: 'matcha' }}, 'tea');
+   *
+   * @name ownProperty
+   * @param {Object} object
+   * @param {String} property
+   * @param {String} message
+   * @api public
+   */
+
+  assert.ownProperty = function (obj, prop, msg) {
+    new Assertion(obj, msg, assert.ownProperty, true)
+      .to.have.own.property(prop);
+  };
+
+  /**
+   * ### .notOwnProperty(object, property, [message])
+   *
+   * Asserts that `object` does _not_ have a direct property named by
+   * `property`. Inherited properties aren't checked.
+   *
+   *     assert.notOwnProperty({ tea: { green: 'matcha' }}, 'coffee');
+   *     assert.notOwnProperty({}, 'toString');
+   *
+   * @name notOwnProperty
+   * @param {Object} object
+   * @param {String} property
+   * @param {String} message
+   * @api public
+   */
+
+  assert.notOwnProperty = function (obj, prop, msg) {
+    new Assertion(obj, msg, assert.notOwnProperty, true)
+      .to.not.have.own.property(prop);
+  };
+
+  /**
+   * ### .ownPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` has a direct property named by `property` and a value
+   * equal to the provided `value`. Uses a strict equality check (===).
+   * Inherited properties aren't checked.
+   *
+   *     assert.ownPropertyVal({ coffee: 'is good'}, 'coffee', 'is good');
+   *
+   * @name ownPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @api public
+   */
+
+  assert.ownPropertyVal = function (obj, prop, value, msg) {
+    new Assertion(obj, msg, assert.ownPropertyVal, true)
+      .to.have.own.property(prop, value);
+  };
+
+  /**
+   * ### .notOwnPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` does _not_ have a direct property named by `property`
+   * with a value equal to the provided `value`. Uses a strict equality check
+   * (===). Inherited properties aren't checked.
+   *
+   *     assert.notOwnPropertyVal({ tea: 'is better'}, 'tea', 'is worse');
+   *     assert.notOwnPropertyVal({}, 'toString', Object.prototype.toString);
+   *
+   * @name notOwnPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @api public
+   */
+
+  assert.notOwnPropertyVal = function (obj, prop, value, msg) {
+    new Assertion(obj, msg, assert.notOwnPropertyVal, true)
+      .to.not.have.own.property(prop, value);
+  };
+
+  /**
+   * ### .deepOwnPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` has a direct property named by `property` and a value
+   * equal to the provided `value`. Uses a deep equality check. Inherited
+   * properties aren't checked.
+   *
+   *     assert.deepOwnPropertyVal({ tea: { green: 'matcha' } }, 'tea', { green: 'matcha' });
+   *
+   * @name deepOwnPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @api public
+   */
+
+  assert.deepOwnPropertyVal = function (obj, prop, value, msg) {
+    new Assertion(obj, msg, assert.deepOwnPropertyVal, true)
+      .to.have.deep.own.property(prop, value);
+  };
+
+  /**
+   * ### .notDeepOwnPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` does _not_ have a direct property named by `property`
+   * with a value equal to the provided `value`. Uses a deep equality check.
+   * Inherited properties aren't checked.
+   *
+   *     assert.notDeepOwnPropertyVal({ tea: { green: 'matcha' } }, 'tea', { black: 'matcha' });
+   *     assert.notDeepOwnPropertyVal({ tea: { green: 'matcha' } }, 'tea', { green: 'oolong' });
+   *     assert.notDeepOwnPropertyVal({ tea: { green: 'matcha' } }, 'coffee', { green: 'matcha' });
+   *     assert.notDeepOwnPropertyVal({}, 'toString', Object.prototype.toString);
+   *
+   * @name notDeepOwnPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @api public
+   */
+
+  assert.notDeepOwnPropertyVal = function (obj, prop, value, msg) {
+    new Assertion(obj, msg, assert.notDeepOwnPropertyVal, true)
+      .to.not.have.deep.own.property(prop, value);
+  };
+
+  /**
+   * ### .nestedProperty(object, property, [message])
+   *
+   * Asserts that `object` has a direct or inherited property named by
+   * `property`, which can be a string using dot- and bracket-notation for
+   * nested reference.
+   *
+   *     assert.nestedProperty({ tea: { green: 'matcha' }}, 'tea.green');
+   *
+   * @name nestedProperty
+   * @param {Object} object
+   * @param {String} property
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.nestedProperty = function (obj, prop, msg) {
+    new Assertion(obj, msg, assert.nestedProperty, true)
+      .to.have.nested.property(prop);
+  };
+
+  /**
+   * ### .notNestedProperty(object, property, [message])
+   *
+   * Asserts that `object` does _not_ have a property named by `property`, which
+   * can be a string using dot- and bracket-notation for nested reference. The
+   * property cannot exist on the object nor anywhere in its prototype chain.
+   *
+   *     assert.notNestedProperty({ tea: { green: 'matcha' }}, 'tea.oolong');
+   *
+   * @name notNestedProperty
+   * @param {Object} object
+   * @param {String} property
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notNestedProperty = function (obj, prop, msg) {
+    new Assertion(obj, msg, assert.notNestedProperty, true)
+      .to.not.have.nested.property(prop);
+  };
+
+  /**
+   * ### .nestedPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` has a property named by `property` with value given
+   * by `value`. `property` can use dot- and bracket-notation for nested
+   * reference. Uses a strict equality check (===).
+   *
+   *     assert.nestedPropertyVal({ tea: { green: 'matcha' }}, 'tea.green', 'matcha');
+   *
+   * @name nestedPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.nestedPropertyVal = function (obj, prop, val, msg) {
+    new Assertion(obj, msg, assert.nestedPropertyVal, true)
+      .to.have.nested.property(prop, val);
+  };
+
+  /**
+   * ### .notNestedPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` does _not_ have a property named by `property` with
+   * value given by `value`. `property` can use dot- and bracket-notation for
+   * nested reference. Uses a strict equality check (===).
+   *
+   *     assert.notNestedPropertyVal({ tea: { green: 'matcha' }}, 'tea.green', 'konacha');
+   *     assert.notNestedPropertyVal({ tea: { green: 'matcha' }}, 'coffee.green', 'matcha');
+   *
+   * @name notNestedPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notNestedPropertyVal = function (obj, prop, val, msg) {
+    new Assertion(obj, msg, assert.notNestedPropertyVal, true)
+      .to.not.have.nested.property(prop, val);
+  };
+
+  /**
+   * ### .deepNestedPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` has a property named by `property` with a value given
+   * by `value`. `property` can use dot- and bracket-notation for nested
+   * reference. Uses a deep equality check.
+   *
+   *     assert.deepNestedPropertyVal({ tea: { green: { matcha: 'yum' } } }, 'tea.green', { matcha: 'yum' });
+   *
+   * @name deepNestedPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.deepNestedPropertyVal = function (obj, prop, val, msg) {
+    new Assertion(obj, msg, assert.deepNestedPropertyVal, true)
+      .to.have.deep.nested.property(prop, val);
+  };
+
+  /**
+   * ### .notDeepNestedPropertyVal(object, property, value, [message])
+   *
+   * Asserts that `object` does _not_ have a property named by `property` with
+   * value given by `value`. `property` can use dot- and bracket-notation for
+   * nested reference. Uses a deep equality check.
+   *
+   *     assert.notDeepNestedPropertyVal({ tea: { green: { matcha: 'yum' } } }, 'tea.green', { oolong: 'yum' });
+   *     assert.notDeepNestedPropertyVal({ tea: { green: { matcha: 'yum' } } }, 'tea.green', { matcha: 'yuck' });
+   *     assert.notDeepNestedPropertyVal({ tea: { green: { matcha: 'yum' } } }, 'tea.black', { matcha: 'yum' });
+   *
+   * @name notDeepNestedPropertyVal
+   * @param {Object} object
+   * @param {String} property
+   * @param {Mixed} value
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notDeepNestedPropertyVal = function (obj, prop, val, msg) {
+    new Assertion(obj, msg, assert.notDeepNestedPropertyVal, true)
+      .to.not.have.deep.nested.property(prop, val);
+  }
+
+  /**
+   * ### .lengthOf(object, length, [message])
+   *
+   * Asserts that `object` has a `length` or `size` with the expected value.
+   *
+   *     assert.lengthOf([1,2,3], 3, 'array has length of 3');
+   *     assert.lengthOf('foobar', 6, 'string has length of 6');
+   *     assert.lengthOf(new Set([1,2,3]), 3, 'set has size of 3');
+   *     assert.lengthOf(new Map([['a',1],['b',2],['c',3]]), 3, 'map has size of 3');
+   *
+   * @name lengthOf
+   * @param {Mixed} object
+   * @param {Number} length
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.lengthOf = function (exp, len, msg) {
+    new Assertion(exp, msg, assert.lengthOf, true).to.have.lengthOf(len);
+  };
+
+  /**
+   * ### .hasAnyKeys(object, [keys], [message])
+   *
+   * Asserts that `object` has at least one of the `keys` provided.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.hasAnyKeys({foo: 1, bar: 2, baz: 3}, ['foo', 'iDontExist', 'baz']);
+   *     assert.hasAnyKeys({foo: 1, bar: 2, baz: 3}, {foo: 30, iDontExist: 99, baz: 1337});
+   *     assert.hasAnyKeys(new Map([[{foo: 1}, 'bar'], ['key', 'value']]), [{foo: 1}, 'key']);
+   *     assert.hasAnyKeys(new Set([{foo: 'bar'}, 'anotherKey']), [{foo: 'bar'}, 'anotherKey']);
+   *
+   * @name hasAnyKeys
+   * @param {Mixed} object
+   * @param {Array|Object} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.hasAnyKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.hasAnyKeys, true).to.have.any.keys(keys);
+  }
+
+  /**
+   * ### .hasAllKeys(object, [keys], [message])
+   *
+   * Asserts that `object` has all and only all of the `keys` provided.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.hasAllKeys({foo: 1, bar: 2, baz: 3}, ['foo', 'bar', 'baz']);
+   *     assert.hasAllKeys({foo: 1, bar: 2, baz: 3}, {foo: 30, bar: 99, baz: 1337]);
+   *     assert.hasAllKeys(new Map([[{foo: 1}, 'bar'], ['key', 'value']]), [{foo: 1}, 'key']);
+   *     assert.hasAllKeys(new Set([{foo: 'bar'}, 'anotherKey'], [{foo: 'bar'}, 'anotherKey']);
+   *
+   * @name hasAllKeys
+   * @param {Mixed} object
+   * @param {String[]} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.hasAllKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.hasAllKeys, true).to.have.all.keys(keys);
+  }
+
+  /**
+   * ### .containsAllKeys(object, [keys], [message])
+   *
+   * Asserts that `object` has all of the `keys` provided but may have more keys not listed.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.containsAllKeys({foo: 1, bar: 2, baz: 3}, ['foo', 'baz']);
+   *     assert.containsAllKeys({foo: 1, bar: 2, baz: 3}, ['foo', 'bar', 'baz']);
+   *     assert.containsAllKeys({foo: 1, bar: 2, baz: 3}, {foo: 30, baz: 1337});
+   *     assert.containsAllKeys({foo: 1, bar: 2, baz: 3}, {foo: 30, bar: 99, baz: 1337});
+   *     assert.containsAllKeys(new Map([[{foo: 1}, 'bar'], ['key', 'value']]), [{foo: 1}]);
+   *     assert.containsAllKeys(new Map([[{foo: 1}, 'bar'], ['key', 'value']]), [{foo: 1}, 'key']);
+   *     assert.containsAllKeys(new Set([{foo: 'bar'}, 'anotherKey'], [{foo: 'bar'}]);
+   *     assert.containsAllKeys(new Set([{foo: 'bar'}, 'anotherKey'], [{foo: 'bar'}, 'anotherKey']);
+   *
+   * @name containsAllKeys
+   * @param {Mixed} object
+   * @param {String[]} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.containsAllKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.containsAllKeys, true)
+      .to.contain.all.keys(keys);
+  }
+
+  /**
+   * ### .doesNotHaveAnyKeys(object, [keys], [message])
+   *
+   * Asserts that `object` has none of the `keys` provided.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.doesNotHaveAnyKeys({foo: 1, bar: 2, baz: 3}, ['one', 'two', 'example']);
+   *     assert.doesNotHaveAnyKeys({foo: 1, bar: 2, baz: 3}, {one: 1, two: 2, example: 'foo'});
+   *     assert.doesNotHaveAnyKeys(new Map([[{foo: 1}, 'bar'], ['key', 'value']]), [{one: 'two'}, 'example']);
+   *     assert.doesNotHaveAnyKeys(new Set([{foo: 'bar'}, 'anotherKey'], [{one: 'two'}, 'example']);
+   *
+   * @name doesNotHaveAnyKeys
+   * @param {Mixed} object
+   * @param {String[]} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.doesNotHaveAnyKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.doesNotHaveAnyKeys, true)
+      .to.not.have.any.keys(keys);
+  }
+
+  /**
+   * ### .doesNotHaveAllKeys(object, [keys], [message])
+   *
+   * Asserts that `object` does not have at least one of the `keys` provided.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.doesNotHaveAllKeys({foo: 1, bar: 2, baz: 3}, ['one', 'two', 'example']);
+   *     assert.doesNotHaveAllKeys({foo: 1, bar: 2, baz: 3}, {one: 1, two: 2, example: 'foo'});
+   *     assert.doesNotHaveAllKeys(new Map([[{foo: 1}, 'bar'], ['key', 'value']]), [{one: 'two'}, 'example']);
+   *     assert.doesNotHaveAllKeys(new Set([{foo: 'bar'}, 'anotherKey'], [{one: 'two'}, 'example']);
+   *
+   * @name doesNotHaveAllKeys
+   * @param {Mixed} object
+   * @param {String[]} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.doesNotHaveAllKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.doesNotHaveAllKeys, true)
+      .to.not.have.all.keys(keys);
+  }
+
+  /**
+   * ### .hasAnyDeepKeys(object, [keys], [message])
+   *
+   * Asserts that `object` has at least one of the `keys` provided.
+   * Since Sets and Maps can have objects as keys you can use this assertion to perform
+   * a deep comparison.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.hasAnyDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [1, 2]]), {one: 'one'});
+   *     assert.hasAnyDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [1, 2]]), [{one: 'one'}, {two: 'two'}]);
+   *     assert.hasAnyDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [{two: 'two'}, 'valueTwo']]), [{one: 'one'}, {two: 'two'}]);
+   *     assert.hasAnyDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), {one: 'one'});
+   *     assert.hasAnyDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), [{one: 'one'}, {three: 'three'}]);
+   *     assert.hasAnyDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), [{one: 'one'}, {two: 'two'}]);
+   *
+   * @name doesNotHaveAllKeys
+   * @param {Mixed} object
+   * @param {Array|Object} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.hasAnyDeepKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.hasAnyDeepKeys, true)
+      .to.have.any.deep.keys(keys);
+  }
+
+ /**
+   * ### .hasAllDeepKeys(object, [keys], [message])
+   *
+   * Asserts that `object` has all and only all of the `keys` provided.
+   * Since Sets and Maps can have objects as keys you can use this assertion to perform
+   * a deep comparison.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.hasAllDeepKeys(new Map([[{one: 'one'}, 'valueOne']]), {one: 'one'});
+   *     assert.hasAllDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [{two: 'two'}, 'valueTwo']]), [{one: 'one'}, {two: 'two'}]);
+   *     assert.hasAllDeepKeys(new Set([{one: 'one'}]), {one: 'one'});
+   *     assert.hasAllDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), [{one: 'one'}, {two: 'two'}]);
+   *
+   * @name hasAllDeepKeys
+   * @param {Mixed} object
+   * @param {Array|Object} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.hasAllDeepKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.hasAllDeepKeys, true)
+      .to.have.all.deep.keys(keys);
+  }
+
+ /**
+   * ### .containsAllDeepKeys(object, [keys], [message])
+   *
+   * Asserts that `object` contains all of the `keys` provided.
+   * Since Sets and Maps can have objects as keys you can use this assertion to perform
+   * a deep comparison.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.containsAllDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [1, 2]]), {one: 'one'});
+   *     assert.containsAllDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [{two: 'two'}, 'valueTwo']]), [{one: 'one'}, {two: 'two'}]);
+   *     assert.containsAllDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), {one: 'one'});
+   *     assert.containsAllDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), [{one: 'one'}, {two: 'two'}]);
+   *
+   * @name containsAllDeepKeys
+   * @param {Mixed} object
+   * @param {Array|Object} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.containsAllDeepKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.containsAllDeepKeys, true)
+      .to.contain.all.deep.keys(keys);
+  }
+
+ /**
+   * ### .doesNotHaveAnyDeepKeys(object, [keys], [message])
+   *
+   * Asserts that `object` has none of the `keys` provided.
+   * Since Sets and Maps can have objects as keys you can use this assertion to perform
+   * a deep comparison.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.doesNotHaveAnyDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [1, 2]]), {thisDoesNot: 'exist'});
+   *     assert.doesNotHaveAnyDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [{two: 'two'}, 'valueTwo']]), [{twenty: 'twenty'}, {fifty: 'fifty'}]);
+   *     assert.doesNotHaveAnyDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), {twenty: 'twenty'});
+   *     assert.doesNotHaveAnyDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), [{twenty: 'twenty'}, {fifty: 'fifty'}]);
+   *
+   * @name doesNotHaveAnyDeepKeys
+   * @param {Mixed} object
+   * @param {Array|Object} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.doesNotHaveAnyDeepKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.doesNotHaveAnyDeepKeys, true)
+      .to.not.have.any.deep.keys(keys);
+  }
+
+ /**
+   * ### .doesNotHaveAllDeepKeys(object, [keys], [message])
+   *
+   * Asserts that `object` does not have at least one of the `keys` provided.
+   * Since Sets and Maps can have objects as keys you can use this assertion to perform
+   * a deep comparison.
+   * You can also provide a single object instead of a `keys` array and its keys
+   * will be used as the expected set of keys.
+   *
+   *     assert.doesNotHaveAllDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [1, 2]]), {thisDoesNot: 'exist'});
+   *     assert.doesNotHaveAllDeepKeys(new Map([[{one: 'one'}, 'valueOne'], [{two: 'two'}, 'valueTwo']]), [{twenty: 'twenty'}, {one: 'one'}]);
+   *     assert.doesNotHaveAllDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), {twenty: 'twenty'});
+   *     assert.doesNotHaveAllDeepKeys(new Set([{one: 'one'}, {two: 'two'}]), [{one: 'one'}, {fifty: 'fifty'}]);
+   *
+   * @name doesNotHaveAllDeepKeys
+   * @param {Mixed} object
+   * @param {Array|Object} keys
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.doesNotHaveAllDeepKeys = function (obj, keys, msg) {
+    new Assertion(obj, msg, assert.doesNotHaveAllDeepKeys, true)
+      .to.not.have.all.deep.keys(keys);
+  }
+
+ /**
+   * ### .throws(fn, [errorLike/string/regexp], [string/regexp], [message])
+   *
+   * If `errorLike` is an `Error` constructor, asserts that `fn` will throw an error that is an
+   * instance of `errorLike`.
+   * If `errorLike` is an `Error` instance, asserts that the error thrown is the same
+   * instance as `errorLike`.
+   * If `errMsgMatcher` is provided, it also asserts that the error thrown will have a
+   * message matching `errMsgMatcher`.
+   *
+   *     assert.throws(fn, 'Error thrown must have this msg');
+   *     assert.throws(fn, /Error thrown must have a msg that matches this/);
+   *     assert.throws(fn, ReferenceError);
+   *     assert.throws(fn, errorInstance);
+   *     assert.throws(fn, ReferenceError, 'Error thrown must be a ReferenceError and have this msg');
+   *     assert.throws(fn, errorInstance, 'Error thrown must be the same errorInstance and have this msg');
+   *     assert.throws(fn, ReferenceError, /Error thrown must be a ReferenceError and match this/);
+   *     assert.throws(fn, errorInstance, /Error thrown must be the same errorInstance and match this/);
+   *
+   * @name throws
+   * @alias throw
+   * @alias Throw
+   * @param {Function} fn
+   * @param {ErrorConstructor|Error} errorLike
+   * @param {RegExp|String} errMsgMatcher
+   * @param {String} message
+   * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.throws = function (fn, errorLike, errMsgMatcher, msg) {
+    if ('string' === typeof errorLike || errorLike instanceof RegExp) {
+      errMsgMatcher = errorLike;
+      errorLike = null;
+    }
+
+    var assertErr = new Assertion(fn, msg, assert.throws, true)
+      .to.throw(errorLike, errMsgMatcher);
+    return flag(assertErr, 'object');
+  };
+
+  /**
+   * ### .doesNotThrow(fn, [errorLike/string/regexp], [string/regexp], [message])
+   *
+   * If `errorLike` is an `Error` constructor, asserts that `fn` will _not_ throw an error that is an
+   * instance of `errorLike`.
+   * If `errorLike` is an `Error` instance, asserts that the error thrown is _not_ the same
+   * instance as `errorLike`.
+   * If `errMsgMatcher` is provided, it also asserts that the error thrown will _not_ have a
+   * message matching `errMsgMatcher`.
+   *
+   *     assert.doesNotThrow(fn, 'Any Error thrown must not have this message');
+   *     assert.doesNotThrow(fn, /Any Error thrown must not match this/);
+   *     assert.doesNotThrow(fn, Error);
+   *     assert.doesNotThrow(fn, errorInstance);
+   *     assert.doesNotThrow(fn, Error, 'Error must not have this message');
+   *     assert.doesNotThrow(fn, errorInstance, 'Error must not have this message');
+   *     assert.doesNotThrow(fn, Error, /Error must not match this/);
+   *     assert.doesNotThrow(fn, errorInstance, /Error must not match this/);
+   *
+   * @name doesNotThrow
+   * @param {Function} fn
+   * @param {ErrorConstructor} errorLike
+   * @param {RegExp|String} errMsgMatcher
+   * @param {String} message
+   * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.doesNotThrow = function (fn, errorLike, errMsgMatcher, msg) {
+    if ('string' === typeof errorLike || errorLike instanceof RegExp) {
+      errMsgMatcher = errorLike;
+      errorLike = null;
+    }
+
+    new Assertion(fn, msg, assert.doesNotThrow, true)
+      .to.not.throw(errorLike, errMsgMatcher);
+  };
+
+  /**
+   * ### .operator(val1, operator, val2, [message])
+   *
+   * Compares two values using `operator`.
+   *
+   *     assert.operator(1, '<', 2, 'everything is ok');
+   *     assert.operator(1, '>', 2, 'this will fail');
+   *
+   * @name operator
+   * @param {Mixed} val1
+   * @param {String} operator
+   * @param {Mixed} val2
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.operator = function (val, operator, val2, msg) {
+    var ok;
+    switch(operator) {
+      case '==':
+        ok = val == val2;
+        break;
+      case '===':
+        ok = val === val2;
+        break;
+      case '>':
+        ok = val > val2;
+        break;
+      case '>=':
+        ok = val >= val2;
+        break;
+      case '<':
+        ok = val < val2;
+        break;
+      case '<=':
+        ok = val <= val2;
+        break;
+      case '!=':
+        ok = val != val2;
+        break;
+      case '!==':
+        ok = val !== val2;
+        break;
+      default:
+        msg = msg ? msg + ': ' : msg;
+        throw new chai.AssertionError(
+          msg + 'Invalid operator "' + operator + '"',
+          undefined,
+          assert.operator
+        );
+    }
+    var test = new Assertion(ok, msg, assert.operator, true);
+    test.assert(
+        true === flag(test, 'object')
+      , 'expected ' + util.inspect(val) + ' to be ' + operator + ' ' + util.inspect(val2)
+      , 'expected ' + util.inspect(val) + ' to not be ' + operator + ' ' + util.inspect(val2) );
+  };
+
+  /**
+   * ### .closeTo(actual, expected, delta, [message])
+   *
+   * Asserts that the target is equal `expected`, to within a +/- `delta` range.
+   *
+   *     assert.closeTo(1.5, 1, 0.5, 'numbers are close');
+   *
+   * @name closeTo
+   * @param {Number} actual
+   * @param {Number} expected
+   * @param {Number} delta
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.closeTo = function (act, exp, delta, msg) {
+    new Assertion(act, msg, assert.closeTo, true).to.be.closeTo(exp, delta);
+  };
+
+  /**
+   * ### .approximately(actual, expected, delta, [message])
+   *
+   * Asserts that the target is equal `expected`, to within a +/- `delta` range.
+   *
+   *     assert.approximately(1.5, 1, 0.5, 'numbers are close');
+   *
+   * @name approximately
+   * @param {Number} actual
+   * @param {Number} expected
+   * @param {Number} delta
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.approximately = function (act, exp, delta, msg) {
+    new Assertion(act, msg, assert.approximately, true)
+      .to.be.approximately(exp, delta);
+  };
+
+  /**
+   * ### .sameMembers(set1, set2, [message])
+   *
+   * Asserts that `set1` and `set2` have the same members in any order. Uses a
+   * strict equality check (===).
+   *
+   *     assert.sameMembers([ 1, 2, 3 ], [ 2, 1, 3 ], 'same members');
+   *
+   * @name sameMembers
+   * @param {Array} set1
+   * @param {Array} set2
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.sameMembers = function (set1, set2, msg) {
+    new Assertion(set1, msg, assert.sameMembers, true)
+      .to.have.same.members(set2);
+  }
+
+  /**
+   * ### .notSameMembers(set1, set2, [message])
+   *
+   * Asserts that `set1` and `set2` don't have the same members in any order.
+   * Uses a strict equality check (===).
+   *
+   *     assert.notSameMembers([ 1, 2, 3 ], [ 5, 1, 3 ], 'not same members');
+   *
+   * @name notSameMembers
+   * @param {Array} set1
+   * @param {Array} set2
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notSameMembers = function (set1, set2, msg) {
+    new Assertion(set1, msg, assert.notSameMembers, true)
+      .to.not.have.same.members(set2);
+  }
+
+  /**
+   * ### .sameDeepMembers(set1, set2, [message])
+   *
+   * Asserts that `set1` and `set2` have the same members in any order. Uses a
+   * deep equality check.
+   *
+   *     assert.sameDeepMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [{ b: 2 }, { a: 1 }, { c: 3 }], 'same deep members');
+   *
+   * @name sameDeepMembers
+   * @param {Array} set1
+   * @param {Array} set2
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.sameDeepMembers = function (set1, set2, msg) {
+    new Assertion(set1, msg, assert.sameDeepMembers, true)
+      .to.have.same.deep.members(set2);
+  }
+
+  /**
+   * ### .notSameDeepMembers(set1, set2, [message])
+   *
+   * Asserts that `set1` and `set2` don't have the same members in any order.
+   * Uses a deep equality check.
+   *
+   *     assert.notSameDeepMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [{ b: 2 }, { a: 1 }, { f: 5 }], 'not same deep members');
+   *
+   * @name notSameDeepMembers
+   * @param {Array} set1
+   * @param {Array} set2
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notSameDeepMembers = function (set1, set2, msg) {
+    new Assertion(set1, msg, assert.notSameDeepMembers, true)
+      .to.not.have.same.deep.members(set2);
+  }
+
+  /**
+   * ### .sameOrderedMembers(set1, set2, [message])
+   *
+   * Asserts that `set1` and `set2` have the same members in the same order.
+   * Uses a strict equality check (===).
+   *
+   *     assert.sameOrderedMembers([ 1, 2, 3 ], [ 1, 2, 3 ], 'same ordered members');
+   *
+   * @name sameOrderedMembers
+   * @param {Array} set1
+   * @param {Array} set2
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.sameOrderedMembers = function (set1, set2, msg) {
+    new Assertion(set1, msg, assert.sameOrderedMembers, true)
+      .to.have.same.ordered.members(set2);
+  }
+
+  /**
+   * ### .notSameOrderedMembers(set1, set2, [message])
+   *
+   * Asserts that `set1` and `set2` don't have the same members in the same
+   * order. Uses a strict equality check (===).
+   *
+   *     assert.notSameOrderedMembers([ 1, 2, 3 ], [ 2, 1, 3 ], 'not same ordered members');
+   *
+   * @name notSameOrderedMembers
+   * @param {Array} set1
+   * @param {Array} set2
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notSameOrderedMembers = function (set1, set2, msg) {
+    new Assertion(set1, msg, assert.notSameOrderedMembers, true)
+      .to.not.have.same.ordered.members(set2);
+  }
+
+  /**
+   * ### .sameDeepOrderedMembers(set1, set2, [message])
+   *
+   * Asserts that `set1` and `set2` have the same members in the same order.
+   * Uses a deep equality check.
+   *
+   * assert.sameDeepOrderedMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [ { a: 1 }, { b: 2 }, { c: 3 } ], 'same deep ordered members');
+   *
+   * @name sameDeepOrderedMembers
+   * @param {Array} set1
+   * @param {Array} set2
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.sameDeepOrderedMembers = function (set1, set2, msg) {
+    new Assertion(set1, msg, assert.sameDeepOrderedMembers, true)
+      .to.have.same.deep.ordered.members(set2);
+  }
+
+  /**
+   * ### .notSameDeepOrderedMembers(set1, set2, [message])
+   *
+   * Asserts that `set1` and `set2` don't have the same members in the same
+   * order. Uses a deep equality check.
+   *
+   * assert.notSameDeepOrderedMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [ { a: 1 }, { b: 2 }, { z: 5 } ], 'not same deep ordered members');
+   * assert.notSameDeepOrderedMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [ { b: 2 }, { a: 1 }, { c: 3 } ], 'not same deep ordered members');
+   *
+   * @name notSameDeepOrderedMembers
+   * @param {Array} set1
+   * @param {Array} set2
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notSameDeepOrderedMembers = function (set1, set2, msg) {
+    new Assertion(set1, msg, assert.notSameDeepOrderedMembers, true)
+      .to.not.have.same.deep.ordered.members(set2);
+  }
+
+  /**
+   * ### .includeMembers(superset, subset, [message])
+   *
+   * Asserts that `subset` is included in `superset` in any order. Uses a
+   * strict equality check (===). Duplicates are ignored.
+   *
+   *     assert.includeMembers([ 1, 2, 3 ], [ 2, 1, 2 ], 'include members');
+   *
+   * @name includeMembers
+   * @param {Array} superset
+   * @param {Array} subset
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.includeMembers = function (superset, subset, msg) {
+    new Assertion(superset, msg, assert.includeMembers, true)
+      .to.include.members(subset);
+  }
+
+  /**
+   * ### .notIncludeMembers(superset, subset, [message])
+   *
+   * Asserts that `subset` isn't included in `superset` in any order. Uses a
+   * strict equality check (===). Duplicates are ignored.
+   *
+   *     assert.notIncludeMembers([ 1, 2, 3 ], [ 5, 1 ], 'not include members');
+   *
+   * @name notIncludeMembers
+   * @param {Array} superset
+   * @param {Array} subset
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notIncludeMembers = function (superset, subset, msg) {
+    new Assertion(superset, msg, assert.notIncludeMembers, true)
+      .to.not.include.members(subset);
+  }
+
+  /**
+   * ### .includeDeepMembers(superset, subset, [message])
+   *
+   * Asserts that `subset` is included in `superset` in any order. Uses a deep
+   * equality check. Duplicates are ignored.
+   *
+   *     assert.includeDeepMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [ { b: 2 }, { a: 1 }, { b: 2 } ], 'include deep members');
+   *
+   * @name includeDeepMembers
+   * @param {Array} superset
+   * @param {Array} subset
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.includeDeepMembers = function (superset, subset, msg) {
+    new Assertion(superset, msg, assert.includeDeepMembers, true)
+      .to.include.deep.members(subset);
+  }
+
+  /**
+   * ### .notIncludeDeepMembers(superset, subset, [message])
+   *
+   * Asserts that `subset` isn't included in `superset` in any order. Uses a
+   * deep equality check. Duplicates are ignored.
+   *
+   *     assert.notIncludeDeepMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [ { b: 2 }, { f: 5 } ], 'not include deep members');
+   *
+   * @name notIncludeDeepMembers
+   * @param {Array} superset
+   * @param {Array} subset
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notIncludeDeepMembers = function (superset, subset, msg) {
+    new Assertion(superset, msg, assert.notIncludeDeepMembers, true)
+      .to.not.include.deep.members(subset);
+  }
+
+  /**
+   * ### .includeOrderedMembers(superset, subset, [message])
+   *
+   * Asserts that `subset` is included in `superset` in the same order
+   * beginning with the first element in `superset`. Uses a strict equality
+   * check (===).
+   *
+   *     assert.includeOrderedMembers([ 1, 2, 3 ], [ 1, 2 ], 'include ordered members');
+   *
+   * @name includeOrderedMembers
+   * @param {Array} superset
+   * @param {Array} subset
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.includeOrderedMembers = function (superset, subset, msg) {
+    new Assertion(superset, msg, assert.includeOrderedMembers, true)
+      .to.include.ordered.members(subset);
+  }
+
+  /**
+   * ### .notIncludeOrderedMembers(superset, subset, [message])
+   *
+   * Asserts that `subset` isn't included in `superset` in the same order
+   * beginning with the first element in `superset`. Uses a strict equality
+   * check (===).
+   *
+   *     assert.notIncludeOrderedMembers([ 1, 2, 3 ], [ 2, 1 ], 'not include ordered members');
+   *     assert.notIncludeOrderedMembers([ 1, 2, 3 ], [ 2, 3 ], 'not include ordered members');
+   *
+   * @name notIncludeOrderedMembers
+   * @param {Array} superset
+   * @param {Array} subset
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notIncludeOrderedMembers = function (superset, subset, msg) {
+    new Assertion(superset, msg, assert.notIncludeOrderedMembers, true)
+      .to.not.include.ordered.members(subset);
+  }
+
+  /**
+   * ### .includeDeepOrderedMembers(superset, subset, [message])
+   *
+   * Asserts that `subset` is included in `superset` in the same order
+   * beginning with the first element in `superset`. Uses a deep equality
+   * check.
+   *
+   *     assert.includeDeepOrderedMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [ { a: 1 }, { b: 2 } ], 'include deep ordered members');
+   *
+   * @name includeDeepOrderedMembers
+   * @param {Array} superset
+   * @param {Array} subset
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.includeDeepOrderedMembers = function (superset, subset, msg) {
+    new Assertion(superset, msg, assert.includeDeepOrderedMembers, true)
+      .to.include.deep.ordered.members(subset);
+  }
+
+  /**
+   * ### .notIncludeDeepOrderedMembers(superset, subset, [message])
+   *
+   * Asserts that `subset` isn't included in `superset` in the same order
+   * beginning with the first element in `superset`. Uses a deep equality
+   * check.
+   *
+   *     assert.notIncludeDeepOrderedMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [ { a: 1 }, { f: 5 } ], 'not include deep ordered members');
+   *     assert.notIncludeDeepOrderedMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [ { b: 2 }, { a: 1 } ], 'not include deep ordered members');
+   *     assert.notIncludeDeepOrderedMembers([ { a: 1 }, { b: 2 }, { c: 3 } ], [ { b: 2 }, { c: 3 } ], 'not include deep ordered members');
+   *
+   * @name notIncludeDeepOrderedMembers
+   * @param {Array} superset
+   * @param {Array} subset
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.notIncludeDeepOrderedMembers = function (superset, subset, msg) {
+    new Assertion(superset, msg, assert.notIncludeDeepOrderedMembers, true)
+      .to.not.include.deep.ordered.members(subset);
+  }
+
+  /**
+   * ### .oneOf(inList, list, [message])
+   *
+   * Asserts that non-object, non-array value `inList` appears in the flat array `list`.
+   *
+   *     assert.oneOf(1, [ 2, 1 ], 'Not found in list');
+   *
+   * @name oneOf
+   * @param {*} inList
+   * @param {Array<*>} list
+   * @param {String} message
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.oneOf = function (inList, list, msg) {
+    new Assertion(inList, msg, assert.oneOf, true).to.be.oneOf(list);
+  }
+
+  /**
+   * ### .changes(function, object, property, [message])
+   *
+   * Asserts that a function changes the value of a property.
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val = 22 };
+   *     assert.changes(fn, obj, 'val');
+   *
+   * @name changes
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.changes = function (fn, obj, prop, msg) {
+    if (arguments.length === 3 && typeof obj === 'function') {
+      msg = prop;
+      prop = null;
+    }
+
+    new Assertion(fn, msg, assert.changes, true).to.change(obj, prop);
+  }
+
+   /**
+   * ### .changesBy(function, object, property, delta, [message])
+   *
+   * Asserts that a function changes the value of a property by an amount (delta).
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val += 2 };
+   *     assert.changesBy(fn, obj, 'val', 2);
+   *
+   * @name changesBy
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {Number} change amount (delta)
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.changesBy = function (fn, obj, prop, delta, msg) {
+    if (arguments.length === 4 && typeof obj === 'function') {
+      var tmpMsg = delta;
+      delta = prop;
+      msg = tmpMsg;
+    } else if (arguments.length === 3) {
+      delta = prop;
+      prop = null;
+    }
+
+    new Assertion(fn, msg, assert.changesBy, true)
+      .to.change(obj, prop).by(delta);
+  }
+
+   /**
+   * ### .doesNotChange(function, object, property, [message])
+   *
+   * Asserts that a function does not change the value of a property.
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { console.log('foo'); };
+   *     assert.doesNotChange(fn, obj, 'val');
+   *
+   * @name doesNotChange
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.doesNotChange = function (fn, obj, prop, msg) {
+    if (arguments.length === 3 && typeof obj === 'function') {
+      msg = prop;
+      prop = null;
+    }
+
+    return new Assertion(fn, msg, assert.doesNotChange, true)
+      .to.not.change(obj, prop);
+  }
+
+  /**
+   * ### .changesButNotBy(function, object, property, delta, [message])
+   *
+   * Asserts that a function does not change the value of a property or of a function's return value by an amount (delta)
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val += 10 };
+   *     assert.changesButNotBy(fn, obj, 'val', 5);
+   *
+   * @name changesButNotBy
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {Number} change amount (delta)
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.changesButNotBy = function (fn, obj, prop, delta, msg) {
+    if (arguments.length === 4 && typeof obj === 'function') {
+      var tmpMsg = delta;
+      delta = prop;
+      msg = tmpMsg;
+    } else if (arguments.length === 3) {
+      delta = prop;
+      prop = null;
+    }
+
+    new Assertion(fn, msg, assert.changesButNotBy, true)
+      .to.change(obj, prop).but.not.by(delta);
+  }
+
+  /**
+   * ### .increases(function, object, property, [message])
+   *
+   * Asserts that a function increases a numeric object property.
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val = 13 };
+   *     assert.increases(fn, obj, 'val');
+   *
+   * @name increases
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.increases = function (fn, obj, prop, msg) {
+    if (arguments.length === 3 && typeof obj === 'function') {
+      msg = prop;
+      prop = null;
+    }
+
+    return new Assertion(fn, msg, assert.increases, true)
+      .to.increase(obj, prop);
+  }
+
+  /**
+   * ### .increasesBy(function, object, property, delta, [message])
+   *
+   * Asserts that a function increases a numeric object property or a function's return value by an amount (delta).
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val += 10 };
+   *     assert.increasesBy(fn, obj, 'val', 10);
+   *
+   * @name increasesBy
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {Number} change amount (delta)
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.increasesBy = function (fn, obj, prop, delta, msg) {
+    if (arguments.length === 4 && typeof obj === 'function') {
+      var tmpMsg = delta;
+      delta = prop;
+      msg = tmpMsg;
+    } else if (arguments.length === 3) {
+      delta = prop;
+      prop = null;
+    }
+
+    new Assertion(fn, msg, assert.increasesBy, true)
+      .to.increase(obj, prop).by(delta);
+  }
+
+  /**
+   * ### .doesNotIncrease(function, object, property, [message])
+   *
+   * Asserts that a function does not increase a numeric object property.
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val = 8 };
+   *     assert.doesNotIncrease(fn, obj, 'val');
+   *
+   * @name doesNotIncrease
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.doesNotIncrease = function (fn, obj, prop, msg) {
+    if (arguments.length === 3 && typeof obj === 'function') {
+      msg = prop;
+      prop = null;
+    }
+
+    return new Assertion(fn, msg, assert.doesNotIncrease, true)
+      .to.not.increase(obj, prop);
+  }
+
+  /**
+   * ### .increasesButNotBy(function, object, property, [message])
+   *
+   * Asserts that a function does not increase a numeric object property or function's return value by an amount (delta).
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val = 15 };
+   *     assert.increasesButNotBy(fn, obj, 'val', 10);
+   *
+   * @name increasesButNotBy
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {Number} change amount (delta)
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.increasesButNotBy = function (fn, obj, prop, delta, msg) {
+    if (arguments.length === 4 && typeof obj === 'function') {
+      var tmpMsg = delta;
+      delta = prop;
+      msg = tmpMsg;
+    } else if (arguments.length === 3) {
+      delta = prop;
+      prop = null;
+    }
+
+    new Assertion(fn, msg, assert.increasesButNotBy, true)
+      .to.increase(obj, prop).but.not.by(delta);
+  }
+
+  /**
+   * ### .decreases(function, object, property, [message])
+   *
+   * Asserts that a function decreases a numeric object property.
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val = 5 };
+   *     assert.decreases(fn, obj, 'val');
+   *
+   * @name decreases
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.decreases = function (fn, obj, prop, msg) {
+    if (arguments.length === 3 && typeof obj === 'function') {
+      msg = prop;
+      prop = null;
+    }
+
+    return new Assertion(fn, msg, assert.decreases, true)
+      .to.decrease(obj, prop);
+  }
+
+  /**
+   * ### .decreasesBy(function, object, property, delta, [message])
+   *
+   * Asserts that a function decreases a numeric object property or a function's return value by an amount (delta)
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val -= 5 };
+   *     assert.decreasesBy(fn, obj, 'val', 5);
+   *
+   * @name decreasesBy
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {Number} change amount (delta)
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.decreasesBy = function (fn, obj, prop, delta, msg) {
+    if (arguments.length === 4 && typeof obj === 'function') {
+      var tmpMsg = delta;
+      delta = prop;
+      msg = tmpMsg;
+    } else if (arguments.length === 3) {
+      delta = prop;
+      prop = null;
+    }
+
+    new Assertion(fn, msg, assert.decreasesBy, true)
+      .to.decrease(obj, prop).by(delta);
+  }
+
+  /**
+   * ### .doesNotDecrease(function, object, property, [message])
+   *
+   * Asserts that a function does not decreases a numeric object property.
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val = 15 };
+   *     assert.doesNotDecrease(fn, obj, 'val');
+   *
+   * @name doesNotDecrease
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.doesNotDecrease = function (fn, obj, prop, msg) {
+    if (arguments.length === 3 && typeof obj === 'function') {
+      msg = prop;
+      prop = null;
+    }
+
+    return new Assertion(fn, msg, assert.doesNotDecrease, true)
+      .to.not.decrease(obj, prop);
+  }
+
+  /**
+   * ### .doesNotDecreaseBy(function, object, property, delta, [message])
+   *
+   * Asserts that a function does not decreases a numeric object property or a function's return value by an amount (delta)
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val = 5 };
+   *     assert.doesNotDecreaseBy(fn, obj, 'val', 1);
+   *
+   * @name doesNotDecrease
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {Number} change amount (delta)
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.doesNotDecreaseBy = function (fn, obj, prop, delta, msg) {
+    if (arguments.length === 4 && typeof obj === 'function') {
+      var tmpMsg = delta;
+      delta = prop;
+      msg = tmpMsg;
+    } else if (arguments.length === 3) {
+      delta = prop;
+      prop = null;
+    }
+
+    return new Assertion(fn, msg, assert.doesNotDecreaseBy, true)
+      .to.not.decrease(obj, prop).by(delta);
+  }
+
+  /**
+   * ### .decreasesButNotBy(function, object, property, delta, [message])
+   *
+   * Asserts that a function does not decreases a numeric object property or a function's return value by an amount (delta)
+   *
+   *     var obj = { val: 10 };
+   *     var fn = function() { obj.val = 5 };
+   *     assert.decreasesButNotBy(fn, obj, 'val', 1);
+   *
+   * @name decreasesButNotBy
+   * @param {Function} modifier function
+   * @param {Object} object or getter function
+   * @param {String} property name _optional_
+   * @param {Number} change amount (delta)
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.decreasesButNotBy = function (fn, obj, prop, delta, msg) {
+    if (arguments.length === 4 && typeof obj === 'function') {
+      var tmpMsg = delta;
+      delta = prop;
+      msg = tmpMsg;
+    } else if (arguments.length === 3) {
+      delta = prop;
+      prop = null;
+    }
+
+    new Assertion(fn, msg, assert.decreasesButNotBy, true)
+      .to.decrease(obj, prop).but.not.by(delta);
+  }
+
+  /*!
+   * ### .ifError(object)
+   *
+   * Asserts if value is not a false value, and throws if it is a true value.
+   * This is added to allow for chai to be a drop-in replacement for Node's
+   * assert class.
+   *
+   *     var err = new Error('I am a custom error');
+   *     assert.ifError(err); // Rethrows err!
+   *
+   * @name ifError
+   * @param {Object} object
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.ifError = function (val) {
+    if (val) {
+      throw(val);
+    }
+  };
+
+  /**
+   * ### .isExtensible(object)
+   *
+   * Asserts that `object` is extensible (can have new properties added to it).
+   *
+   *     assert.isExtensible({});
+   *
+   * @name isExtensible
+   * @alias extensible
+   * @param {Object} object
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isExtensible = function (obj, msg) {
+    new Assertion(obj, msg, assert.isExtensible, true).to.be.extensible;
+  };
+
+  /**
+   * ### .isNotExtensible(object)
+   *
+   * Asserts that `object` is _not_ extensible.
+   *
+   *     var nonExtensibleObject = Object.preventExtensions({});
+   *     var sealedObject = Object.seal({});
+   *     var frozenObject = Object.freeze({});
+   *
+   *     assert.isNotExtensible(nonExtensibleObject);
+   *     assert.isNotExtensible(sealedObject);
+   *     assert.isNotExtensible(frozenObject);
+   *
+   * @name isNotExtensible
+   * @alias notExtensible
+   * @param {Object} object
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotExtensible = function (obj, msg) {
+    new Assertion(obj, msg, assert.isNotExtensible, true).to.not.be.extensible;
+  };
+
+  /**
+   * ### .isSealed(object)
+   *
+   * Asserts that `object` is sealed (cannot have new properties added to it
+   * and its existing properties cannot be removed).
+   *
+   *     var sealedObject = Object.seal({});
+   *     var frozenObject = Object.seal({});
+   *
+   *     assert.isSealed(sealedObject);
+   *     assert.isSealed(frozenObject);
+   *
+   * @name isSealed
+   * @alias sealed
+   * @param {Object} object
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isSealed = function (obj, msg) {
+    new Assertion(obj, msg, assert.isSealed, true).to.be.sealed;
+  };
+
+  /**
+   * ### .isNotSealed(object)
+   *
+   * Asserts that `object` is _not_ sealed.
+   *
+   *     assert.isNotSealed({});
+   *
+   * @name isNotSealed
+   * @alias notSealed
+   * @param {Object} object
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotSealed = function (obj, msg) {
+    new Assertion(obj, msg, assert.isNotSealed, true).to.not.be.sealed;
+  };
+
+  /**
+   * ### .isFrozen(object)
+   *
+   * Asserts that `object` is frozen (cannot have new properties added to it
+   * and its existing properties cannot be modified).
+   *
+   *     var frozenObject = Object.freeze({});
+   *     assert.frozen(frozenObject);
+   *
+   * @name isFrozen
+   * @alias frozen
+   * @param {Object} object
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isFrozen = function (obj, msg) {
+    new Assertion(obj, msg, assert.isFrozen, true).to.be.frozen;
+  };
+
+  /**
+   * ### .isNotFrozen(object)
+   *
+   * Asserts that `object` is _not_ frozen.
+   *
+   *     assert.isNotFrozen({});
+   *
+   * @name isNotFrozen
+   * @alias notFrozen
+   * @param {Object} object
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotFrozen = function (obj, msg) {
+    new Assertion(obj, msg, assert.isNotFrozen, true).to.not.be.frozen;
+  };
+
+  /**
+   * ### .isEmpty(target)
+   *
+   * Asserts that the target does not contain any values.
+   * For arrays and strings, it checks the `length` property.
+   * For `Map` and `Set` instances, it checks the `size` property.
+   * For non-function objects, it gets the count of own
+   * enumerable string keys.
+   *
+   *     assert.isEmpty([]);
+   *     assert.isEmpty('');
+   *     assert.isEmpty(new Map);
+   *     assert.isEmpty({});
+   *
+   * @name isEmpty
+   * @alias empty
+   * @param {Object|Array|String|Map|Set} target
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isEmpty = function(val, msg) {
+    new Assertion(val, msg, assert.isEmpty, true).to.be.empty;
+  };
+
+  /**
+   * ### .isNotEmpty(target)
+   *
+   * Asserts that the target contains values.
+   * For arrays and strings, it checks the `length` property.
+   * For `Map` and `Set` instances, it checks the `size` property.
+   * For non-function objects, it gets the count of own
+   * enumerable string keys.
+   *
+   *     assert.isNotEmpty([1, 2]);
+   *     assert.isNotEmpty('34');
+   *     assert.isNotEmpty(new Set([5, 6]));
+   *     assert.isNotEmpty({ key: 7 });
+   *
+   * @name isNotEmpty
+   * @alias notEmpty
+   * @param {Object|Array|String|Map|Set} target
+   * @param {String} message _optional_
+   * @namespace Assert
+   * @api public
+   */
+
+  assert.isNotEmpty = function(val, msg) {
+    new Assertion(val, msg, assert.isNotEmpty, true).to.not.be.empty;
+  };
+
+  /*!
+   * Aliases.
+   */
+
+  (function alias(name, as){
+    assert[as] = assert[name];
+    return alias;
+  })
+  ('isOk', 'ok')
+  ('isNotOk', 'notOk')
+  ('throws', 'throw')
+  ('throws', 'Throw')
+  ('isExtensible', 'extensible')
+  ('isNotExtensible', 'notExtensible')
+  ('isSealed', 'sealed')
+  ('isNotSealed', 'notSealed')
+  ('isFrozen', 'frozen')
+  ('isNotFrozen', 'notFrozen')
+  ('isEmpty', 'empty')
+  ('isNotEmpty', 'notEmpty');
+};
+
+},{}],7:[function(require,module,exports){
+/*!
+ * chai
+ * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+module.exports = function (chai, util) {
+  chai.expect = function (val, message) {
+    return new chai.Assertion(val, message);
+  };
+
+  /**
+   * ### .fail([message])
+   * ### .fail(actual, expected, [message], [operator])
+   *
+   * Throw a failure.
+   *
+   *     expect.fail();
+   *     expect.fail("custom error message");
+   *     expect.fail(1, 2);
+   *     expect.fail(1, 2, "custom error message");
+   *     expect.fail(1, 2, "custom error message", ">");
+   *     expect.fail(1, 2, undefined, ">");
+   *
+   * @name fail
+   * @param {Mixed} actual
+   * @param {Mixed} expected
+   * @param {String} message
+   * @param {String} operator
+   * @namespace BDD
+   * @api public
+   */
+
+  chai.expect.fail = function (actual, expected, message, operator) {
+    if (arguments.length < 2) {
+        message = actual;
+        actual = undefined;
+    }
+
+    message = message || 'expect.fail()';
+    throw new chai.AssertionError(message, {
+        actual: actual
+      , expected: expected
+      , operator: operator
+    }, chai.expect.fail);
+  };
+};
+
+},{}],8:[function(require,module,exports){
+/*!
+ * chai
+ * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+module.exports = function (chai, util) {
+  var Assertion = chai.Assertion;
+
+  function loadShould () {
+    // explicitly define this method as function as to have it's name to include as `ssfi`
+    function shouldGetter() {
+      if (this instanceof String
+          || this instanceof Number
+          || this instanceof Boolean
+          || typeof Symbol === 'function' && this instanceof Symbol) {
+        return new Assertion(this.valueOf(), null, shouldGetter);
+      }
+      return new Assertion(this, null, shouldGetter);
+    }
+    function shouldSetter(value) {
+      // See https://github.com/chaijs/chai/issues/86: this makes
+      // `whatever.should = someValue` actually set `someValue`, which is
+      // especially useful for `global.should = require('chai').should()`.
+      //
+      // Note that we have to use [[DefineProperty]] instead of [[Put]]
+      // since otherwise we would trigger this very setter!
+      Object.defineProperty(this, 'should', {
+        value: value,
+        enumerable: true,
+        configurable: true,
+        writable: true
+      });
+    }
+    // modify Object.prototype to have `should`
+    Object.defineProperty(Object.prototype, 'should', {
+      set: shouldSetter
+      , get: shouldGetter
+      , configurable: true
+    });
+
+    var should = {};
+
+    /**
+     * ### .fail([message])
+     * ### .fail(actual, expected, [message], [operator])
+     *
+     * Throw a failure.
+     *
+     *     should.fail();
+     *     should.fail("custom error message");
+     *     should.fail(1, 2);
+     *     should.fail(1, 2, "custom error message");
+     *     should.fail(1, 2, "custom error message", ">");
+     *     should.fail(1, 2, undefined, ">");
+     *
+     *
+     * @name fail
+     * @param {Mixed} actual
+     * @param {Mixed} expected
+     * @param {String} message
+     * @param {String} operator
+     * @namespace BDD
+     * @api public
+     */
+
+    should.fail = function (actual, expected, message, operator) {
+      if (arguments.length < 2) {
+          message = actual;
+          actual = undefined;
+      }
+
+      message = message || 'should.fail()';
+      throw new chai.AssertionError(message, {
+          actual: actual
+        , expected: expected
+        , operator: operator
+      }, should.fail);
+    };
+
+    /**
+     * ### .equal(actual, expected, [message])
+     *
+     * Asserts non-strict equality (`==`) of `actual` and `expected`.
+     *
+     *     should.equal(3, '3', '== coerces values to strings');
+     *
+     * @name equal
+     * @param {Mixed} actual
+     * @param {Mixed} expected
+     * @param {String} message
+     * @namespace Should
+     * @api public
+     */
+
+    should.equal = function (val1, val2, msg) {
+      new Assertion(val1, msg).to.equal(val2);
+    };
+
+    /**
+     * ### .throw(function, [constructor/string/regexp], [string/regexp], [message])
+     *
+     * Asserts that `function` will throw an error that is an instance of
+     * `constructor`, or alternately that it will throw an error with message
+     * matching `regexp`.
+     *
+     *     should.throw(fn, 'function throws a reference error');
+     *     should.throw(fn, /function throws a reference error/);
+     *     should.throw(fn, ReferenceError);
+     *     should.throw(fn, ReferenceError, 'function throws a reference error');
+     *     should.throw(fn, ReferenceError, /function throws a reference error/);
+     *
+     * @name throw
+     * @alias Throw
+     * @param {Function} function
+     * @param {ErrorConstructor} constructor
+     * @param {RegExp} regexp
+     * @param {String} message
+     * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
+     * @namespace Should
+     * @api public
+     */
+
+    should.Throw = function (fn, errt, errs, msg) {
+      new Assertion(fn, msg).to.Throw(errt, errs);
+    };
+
+    /**
+     * ### .exist
+     *
+     * Asserts that the target is neither `null` nor `undefined`.
+     *
+     *     var foo = 'hi';
+     *
+     *     should.exist(foo, 'foo exists');
+     *
+     * @name exist
+     * @namespace Should
+     * @api public
+     */
+
+    should.exist = function (val, msg) {
+      new Assertion(val, msg).to.exist;
+    }
+
+    // negation
+    should.not = {}
+
+    /**
+     * ### .not.equal(actual, expected, [message])
+     *
+     * Asserts non-strict inequality (`!=`) of `actual` and `expected`.
+     *
+     *     should.not.equal(3, 4, 'these numbers are not equal');
+     *
+     * @name not.equal
+     * @param {Mixed} actual
+     * @param {Mixed} expected
+     * @param {String} message
+     * @namespace Should
+     * @api public
+     */
+
+    should.not.equal = function (val1, val2, msg) {
+      new Assertion(val1, msg).to.not.equal(val2);
+    };
+
+    /**
+     * ### .throw(function, [constructor/regexp], [message])
+     *
+     * Asserts that `function` will _not_ throw an error that is an instance of
+     * `constructor`, or alternately that it will not throw an error with message
+     * matching `regexp`.
+     *
+     *     should.not.throw(fn, Error, 'function does not throw');
+     *
+     * @name not.throw
+     * @alias not.Throw
+     * @param {Function} function
+     * @param {ErrorConstructor} constructor
+     * @param {RegExp} regexp
+     * @param {String} message
+     * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
+     * @namespace Should
+     * @api public
+     */
+
+    should.not.Throw = function (fn, errt, errs, msg) {
+      new Assertion(fn, msg).to.not.Throw(errt, errs);
+    };
+
+    /**
+     * ### .not.exist
+     *
+     * Asserts that the target is neither `null` nor `undefined`.
+     *
+     *     var bar = null;
+     *
+     *     should.not.exist(bar, 'bar does not exist');
+     *
+     * @name not.exist
+     * @namespace Should
+     * @api public
+     */
+
+    should.not.exist = function (val, msg) {
+      new Assertion(val, msg).to.not.exist;
+    }
+
+    should['throw'] = should['Throw'];
+    should.not['throw'] = should.not['Throw'];
+
+    return should;
+  };
+
+  chai.should = loadShould;
+  chai.Should = loadShould;
+};
+
+},{}],9:[function(require,module,exports){
+/*!
+ * Chai - addChainingMethod utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/*!
+ * Module dependencies
+ */
+
+var addLengthGuard = require('./addLengthGuard');
+var chai = require('../../chai');
+var flag = require('./flag');
+var proxify = require('./proxify');
+var transferFlags = require('./transferFlags');
+
+/*!
+ * Module variables
+ */
+
+// Check whether `Object.setPrototypeOf` is supported
+var canSetPrototype = typeof Object.setPrototypeOf === 'function';
+
+// Without `Object.setPrototypeOf` support, this module will need to add properties to a function.
+// However, some of functions' own props are not configurable and should be skipped.
+var testFn = function() {};
+var excludeNames = Object.getOwnPropertyNames(testFn).filter(function(name) {
+  var propDesc = Object.getOwnPropertyDescriptor(testFn, name);
+
+  // Note: PhantomJS 1.x includes `callee` as one of `testFn`'s own properties,
+  // but then returns `undefined` as the property descriptor for `callee`. As a
+  // workaround, we perform an otherwise unnecessary type-check for `propDesc`,
+  // and then filter it out if it's not an object as it should be.
+  if (typeof propDesc !== 'object')
+    return true;
+
+  return !propDesc.configurable;
+});
+
+// Cache `Function` properties
+var call  = Function.prototype.call,
+    apply = Function.prototype.apply;
+
+/**
+ * ### .addChainableMethod(ctx, name, method, chainingBehavior)
+ *
+ * Adds a method to an object, such that the method can also be chained.
+ *
+ *     utils.addChainableMethod(chai.Assertion.prototype, 'foo', function (str) {
+ *       var obj = utils.flag(this, 'object');
+ *       new chai.Assertion(obj).to.be.equal(str);
+ *     });
+ *
+ * Can also be accessed directly from `chai.Assertion`.
+ *
+ *     chai.Assertion.addChainableMethod('foo', fn, chainingBehavior);
+ *
+ * The result can then be used as both a method assertion, executing both `method` and
+ * `chainingBehavior`, or as a language chain, which only executes `chainingBehavior`.
+ *
+ *     expect(fooStr).to.be.foo('bar');
+ *     expect(fooStr).to.be.foo.equal('foo');
+ *
+ * @param {Object} ctx object to which the method is added
+ * @param {String} name of method to add
+ * @param {Function} method function to be used for `name`, when called
+ * @param {Function} chainingBehavior function to be called every time the property is accessed
+ * @namespace Utils
+ * @name addChainableMethod
+ * @api public
+ */
+
+module.exports = function addChainableMethod(ctx, name, method, chainingBehavior) {
+  if (typeof chainingBehavior !== 'function') {
+    chainingBehavior = function () { };
+  }
+
+  var chainableBehavior = {
+      method: method
+    , chainingBehavior: chainingBehavior
+  };
+
+  // save the methods so we can overwrite them later, if we need to.
+  if (!ctx.__methods) {
+    ctx.__methods = {};
+  }
+  ctx.__methods[name] = chainableBehavior;
+
+  Object.defineProperty(ctx, name,
+    { get: function chainableMethodGetter() {
+        chainableBehavior.chainingBehavior.call(this);
+
+        var chainableMethodWrapper = function () {
+          // Setting the `ssfi` flag to `chainableMethodWrapper` causes this
+          // function to be the starting point for removing implementation
+          // frames from the stack trace of a failed assertion.
+          //
+          // However, we only want to use this function as the starting point if
+          // the `lockSsfi` flag isn't set.
+          //
+          // If the `lockSsfi` flag is set, then this assertion is being
+          // invoked from inside of another assertion. In this case, the `ssfi`
+          // flag has already been set by the outer assertion.
+          //
+          // Note that overwriting a chainable method merely replaces the saved
+          // methods in `ctx.__methods` instead of completely replacing the
+          // overwritten assertion. Therefore, an overwriting assertion won't
+          // set the `ssfi` or `lockSsfi` flags.
+          if (!flag(this, 'lockSsfi')) {
+            flag(this, 'ssfi', chainableMethodWrapper);
+          }
+
+          var result = chainableBehavior.method.apply(this, arguments);
+          if (result !== undefined) {
+            return result;
+          }
+
+          var newAssertion = new chai.Assertion();
+          transferFlags(this, newAssertion);
+          return newAssertion;
+        };
+
+        addLengthGuard(chainableMethodWrapper, name, true);
+
+        // Use `Object.setPrototypeOf` if available
+        if (canSetPrototype) {
+          // Inherit all properties from the object by replacing the `Function` prototype
+          var prototype = Object.create(this);
+          // Restore the `call` and `apply` methods from `Function`
+          prototype.call = call;
+          prototype.apply = apply;
+          Object.setPrototypeOf(chainableMethodWrapper, prototype);
+        }
+        // Otherwise, redefine all properties (slow!)
+        else {
+          var asserterNames = Object.getOwnPropertyNames(ctx);
+          asserterNames.forEach(function (asserterName) {
+            if (excludeNames.indexOf(asserterName) !== -1) {
+              return;
+            }
+
+            var pd = Object.getOwnPropertyDescriptor(ctx, asserterName);
+            Object.defineProperty(chainableMethodWrapper, asserterName, pd);
+          });
+        }
+
+        transferFlags(this, chainableMethodWrapper);
+        return proxify(chainableMethodWrapper);
+      }
+    , configurable: true
+  });
+};
+
+},{"../../chai":2,"./addLengthGuard":10,"./flag":15,"./proxify":30,"./transferFlags":32}],10:[function(require,module,exports){
+var fnLengthDesc = Object.getOwnPropertyDescriptor(function () {}, 'length');
+
+/*!
+ * Chai - addLengthGuard utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .addLengthGuard(fn, assertionName, isChainable)
+ *
+ * Define `length` as a getter on the given uninvoked method assertion. The
+ * getter acts as a guard against chaining `length` directly off of an uninvoked
+ * method assertion, which is a problem because it references `function`'s
+ * built-in `length` property instead of Chai's `length` assertion. When the
+ * getter catches the user making this mistake, it throws an error with a
+ * helpful message.
+ *
+ * There are two ways in which this mistake can be made. The first way is by
+ * chaining the `length` assertion directly off of an uninvoked chainable
+ * method. In this case, Chai suggests that the user use `lengthOf` instead. The
+ * second way is by chaining the `length` assertion directly off of an uninvoked
+ * non-chainable method. Non-chainable methods must be invoked prior to
+ * chaining. In this case, Chai suggests that the user consult the docs for the
+ * given assertion.
+ *
+ * If the `length` property of functions is unconfigurable, then return `fn`
+ * without modification.
+ *
+ * Note that in ES6, the function's `length` property is configurable, so once
+ * support for legacy environments is dropped, Chai's `length` property can
+ * replace the built-in function's `length` property, and this length guard will
+ * no longer be necessary. In the mean time, maintaining consistency across all
+ * environments is the priority.
+ *
+ * @param {Function} fn
+ * @param {String} assertionName
+ * @param {Boolean} isChainable
+ * @namespace Utils
+ * @name addLengthGuard
+ */
+
+module.exports = function addLengthGuard (fn, assertionName, isChainable) {
+  if (!fnLengthDesc.configurable) return fn;
+
+  Object.defineProperty(fn, 'length', {
+    get: function () {
+      if (isChainable) {
+        throw Error('Invalid Chai property: ' + assertionName + '.length. Due' +
+          ' to a compatibility issue, "length" cannot directly follow "' +
+          assertionName + '". Use "' + assertionName + '.lengthOf" instead.');
+      }
+
+      throw Error('Invalid Chai property: ' + assertionName + '.length. See' +
+        ' docs for proper usage of "' + assertionName + '".');
+    }
+  });
+
+  return fn;
+};
+
+},{}],11:[function(require,module,exports){
+/*!
+ * Chai - addMethod utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+var addLengthGuard = require('./addLengthGuard');
+var chai = require('../../chai');
+var flag = require('./flag');
+var proxify = require('./proxify');
+var transferFlags = require('./transferFlags');
+
+/**
+ * ### .addMethod(ctx, name, method)
+ *
+ * Adds a method to the prototype of an object.
+ *
+ *     utils.addMethod(chai.Assertion.prototype, 'foo', function (str) {
+ *       var obj = utils.flag(this, 'object');
+ *       new chai.Assertion(obj).to.be.equal(str);
+ *     });
+ *
+ * Can also be accessed directly from `chai.Assertion`.
+ *
+ *     chai.Assertion.addMethod('foo', fn);
+ *
+ * Then can be used as any other assertion.
+ *
+ *     expect(fooStr).to.be.foo('bar');
+ *
+ * @param {Object} ctx object to which the method is added
+ * @param {String} name of method to add
+ * @param {Function} method function to be used for name
+ * @namespace Utils
+ * @name addMethod
+ * @api public
+ */
+
+module.exports = function addMethod(ctx, name, method) {
+  var methodWrapper = function () {
+    // Setting the `ssfi` flag to `methodWrapper` causes this function to be the
+    // starting point for removing implementation frames from the stack trace of
+    // a failed assertion.
+    //
+    // However, we only want to use this function as the starting point if the
+    // `lockSsfi` flag isn't set.
+    //
+    // If the `lockSsfi` flag is set, then either this assertion has been
+    // overwritten by another assertion, or this assertion is being invoked from
+    // inside of another assertion. In the first case, the `ssfi` flag has
+    // already been set by the overwriting assertion. In the second case, the
+    // `ssfi` flag has already been set by the outer assertion.
+    if (!flag(this, 'lockSsfi')) {
+      flag(this, 'ssfi', methodWrapper);
+    }
+
+    var result = method.apply(this, arguments);
+    if (result !== undefined)
+      return result;
+
+    var newAssertion = new chai.Assertion();
+    transferFlags(this, newAssertion);
+    return newAssertion;
+  };
+
+  addLengthGuard(methodWrapper, name, false);
+  ctx[name] = proxify(methodWrapper, name);
+};
+
+},{"../../chai":2,"./addLengthGuard":10,"./flag":15,"./proxify":30,"./transferFlags":32}],12:[function(require,module,exports){
+/*!
+ * Chai - addProperty utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+var chai = require('../../chai');
+var flag = require('./flag');
+var isProxyEnabled = require('./isProxyEnabled');
+var transferFlags = require('./transferFlags');
+
+/**
+ * ### .addProperty(ctx, name, getter)
+ *
+ * Adds a property to the prototype of an object.
+ *
+ *     utils.addProperty(chai.Assertion.prototype, 'foo', function () {
+ *       var obj = utils.flag(this, 'object');
+ *       new chai.Assertion(obj).to.be.instanceof(Foo);
+ *     });
+ *
+ * Can also be accessed directly from `chai.Assertion`.
+ *
+ *     chai.Assertion.addProperty('foo', fn);
+ *
+ * Then can be used as any other assertion.
+ *
+ *     expect(myFoo).to.be.foo;
+ *
+ * @param {Object} ctx object to which the property is added
+ * @param {String} name of property to add
+ * @param {Function} getter function to be used for name
+ * @namespace Utils
+ * @name addProperty
+ * @api public
+ */
+
+module.exports = function addProperty(ctx, name, getter) {
+  getter = getter === undefined ? function () {} : getter;
+
+  Object.defineProperty(ctx, name,
+    { get: function propertyGetter() {
+        // Setting the `ssfi` flag to `propertyGetter` causes this function to
+        // be the starting point for removing implementation frames from the
+        // stack trace of a failed assertion.
+        //
+        // However, we only want to use this function as the starting point if
+        // the `lockSsfi` flag isn't set and proxy protection is disabled.
+        //
+        // If the `lockSsfi` flag is set, then either this assertion has been
+        // overwritten by another assertion, or this assertion is being invoked
+        // from inside of another assertion. In the first case, the `ssfi` flag
+        // has already been set by the overwriting assertion. In the second
+        // case, the `ssfi` flag has already been set by the outer assertion.
+        //
+        // If proxy protection is enabled, then the `ssfi` flag has already been
+        // set by the proxy getter.
+        if (!isProxyEnabled() && !flag(this, 'lockSsfi')) {
+          flag(this, 'ssfi', propertyGetter);
+        }
+
+        var result = getter.call(this);
+        if (result !== undefined)
+          return result;
+
+        var newAssertion = new chai.Assertion();
+        transferFlags(this, newAssertion);
+        return newAssertion;
+      }
+    , configurable: true
+  });
+};
+
+},{"../../chai":2,"./flag":15,"./isProxyEnabled":25,"./transferFlags":32}],13:[function(require,module,exports){
+/*!
+ * Chai - compareByInspect utility
+ * Copyright(c) 2011-2016 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/*!
+ * Module dependencies
+ */
+
+var inspect = require('./inspect');
+
+/**
+ * ### .compareByInspect(mixed, mixed)
+ *
+ * To be used as a compareFunction with Array.prototype.sort. Compares elements
+ * using inspect instead of default behavior of using toString so that Symbols
+ * and objects with irregular/missing toString can still be sorted without a
+ * TypeError.
+ *
+ * @param {Mixed} first element to compare
+ * @param {Mixed} second element to compare
+ * @returns {Number} -1 if 'a' should come before 'b'; otherwise 1
+ * @name compareByInspect
+ * @namespace Utils
+ * @api public
+ */
+
+module.exports = function compareByInspect(a, b) {
+  return inspect(a) < inspect(b) ? -1 : 1;
+};
+
+},{"./inspect":23}],14:[function(require,module,exports){
+/*!
+ * Chai - expectTypes utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .expectTypes(obj, types)
+ *
+ * Ensures that the object being tested against is of a valid type.
+ *
+ *     utils.expectTypes(this, ['array', 'object', 'string']);
+ *
+ * @param {Mixed} obj constructed Assertion
+ * @param {Array} type A list of allowed types for this assertion
+ * @namespace Utils
+ * @name expectTypes
+ * @api public
+ */
+
+var AssertionError = require('assertion-error');
+var flag = require('./flag');
+var type = require('type-detect');
+
+module.exports = function expectTypes(obj, types) {
+  var flagMsg = flag(obj, 'message');
+  var ssfi = flag(obj, 'ssfi');
+
+  flagMsg = flagMsg ? flagMsg + ': ' : '';
+
+  obj = flag(obj, 'object');
+  types = types.map(function (t) { return t.toLowerCase(); });
+  types.sort();
+
+  // Transforms ['lorem', 'ipsum'] into 'a lorem, or an ipsum'
+  var str = types.map(function (t, index) {
+    var art = ~[ 'a', 'e', 'i', 'o', 'u' ].indexOf(t.charAt(0)) ? 'an' : 'a';
+    var or = types.length > 1 && index === types.length - 1 ? 'or ' : '';
+    return or + art + ' ' + t;
+  }).join(', ');
+
+  var objType = type(obj).toLowerCase();
+
+  if (!types.some(function (expected) { return objType === expected; })) {
+    throw new AssertionError(
+      flagMsg + 'object tested must be ' + str + ', but ' + objType + ' given',
+      undefined,
+      ssfi
+    );
+  }
+};
+
+},{"./flag":15,"assertion-error":33,"type-detect":38}],15:[function(require,module,exports){
+/*!
+ * Chai - flag utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .flag(object, key, [value])
+ *
+ * Get or set a flag value on an object. If a
+ * value is provided it will be set, else it will
+ * return the currently set value or `undefined` if
+ * the value is not set.
+ *
+ *     utils.flag(this, 'foo', 'bar'); // setter
+ *     utils.flag(this, 'foo'); // getter, returns `bar`
+ *
+ * @param {Object} object constructed Assertion
+ * @param {String} key
+ * @param {Mixed} value (optional)
+ * @namespace Utils
+ * @name flag
+ * @api private
+ */
+
+module.exports = function flag(obj, key, value) {
+  var flags = obj.__flags || (obj.__flags = Object.create(null));
+  if (arguments.length === 3) {
+    flags[key] = value;
+  } else {
+    return flags[key];
+  }
+};
+
+},{}],16:[function(require,module,exports){
+/*!
+ * Chai - getActual utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .getActual(object, [actual])
+ *
+ * Returns the `actual` value for an Assertion.
+ *
+ * @param {Object} object (constructed Assertion)
+ * @param {Arguments} chai.Assertion.prototype.assert arguments
+ * @namespace Utils
+ * @name getActual
+ */
+
+module.exports = function getActual(obj, args) {
+  return args.length > 4 ? args[4] : obj._obj;
+};
+
+},{}],17:[function(require,module,exports){
+/*!
+ * Chai - getEnumerableProperties utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .getEnumerableProperties(object)
+ *
+ * This allows the retrieval of enumerable property names of an object,
+ * inherited or not.
+ *
+ * @param {Object} object
+ * @returns {Array}
+ * @namespace Utils
+ * @name getEnumerableProperties
+ * @api public
+ */
+
+module.exports = function getEnumerableProperties(object) {
+  var result = [];
+  for (var name in object) {
+    result.push(name);
+  }
+  return result;
+};
+
+},{}],18:[function(require,module,exports){
+/*!
+ * Chai - message composition utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/*!
+ * Module dependencies
+ */
+
+var flag = require('./flag')
+  , getActual = require('./getActual')
+  , objDisplay = require('./objDisplay');
+
+/**
+ * ### .getMessage(object, message, negateMessage)
+ *
+ * Construct the error message based on flags
+ * and template tags. Template tags will return
+ * a stringified inspection of the object referenced.
+ *
+ * Message template tags:
+ * - `#{this}` current asserted object
+ * - `#{act}` actual value
+ * - `#{exp}` expected value
+ *
+ * @param {Object} object (constructed Assertion)
+ * @param {Arguments} chai.Assertion.prototype.assert arguments
+ * @namespace Utils
+ * @name getMessage
+ * @api public
+ */
+
+module.exports = function getMessage(obj, args) {
+  var negate = flag(obj, 'negate')
+    , val = flag(obj, 'object')
+    , expected = args[3]
+    , actual = getActual(obj, args)
+    , msg = negate ? args[2] : args[1]
+    , flagMsg = flag(obj, 'message');
+
+  if(typeof msg === "function") msg = msg();
+  msg = msg || '';
+  msg = msg
+    .replace(/#\{this\}/g, function () { return objDisplay(val); })
+    .replace(/#\{act\}/g, function () { return objDisplay(actual); })
+    .replace(/#\{exp\}/g, function () { return objDisplay(expected); });
+
+  return flagMsg ? flagMsg + ': ' + msg : msg;
+};
+
+},{"./flag":15,"./getActual":16,"./objDisplay":26}],19:[function(require,module,exports){
+/*!
+ * Chai - getOwnEnumerableProperties utility
+ * Copyright(c) 2011-2016 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/*!
+ * Module dependencies
+ */
+
+var getOwnEnumerablePropertySymbols = require('./getOwnEnumerablePropertySymbols');
+
+/**
+ * ### .getOwnEnumerableProperties(object)
+ *
+ * This allows the retrieval of directly-owned enumerable property names and
+ * symbols of an object. This function is necessary because Object.keys only
+ * returns enumerable property names, not enumerable property symbols.
+ *
+ * @param {Object} object
+ * @returns {Array}
+ * @namespace Utils
+ * @name getOwnEnumerableProperties
+ * @api public
+ */
+
+module.exports = function getOwnEnumerableProperties(obj) {
+  return Object.keys(obj).concat(getOwnEnumerablePropertySymbols(obj));
+};
+
+},{"./getOwnEnumerablePropertySymbols":20}],20:[function(require,module,exports){
+/*!
+ * Chai - getOwnEnumerablePropertySymbols utility
+ * Copyright(c) 2011-2016 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .getOwnEnumerablePropertySymbols(object)
+ *
+ * This allows the retrieval of directly-owned enumerable property symbols of an
+ * object. This function is necessary because Object.getOwnPropertySymbols
+ * returns both enumerable and non-enumerable property symbols.
+ *
+ * @param {Object} object
+ * @returns {Array}
+ * @namespace Utils
+ * @name getOwnEnumerablePropertySymbols
+ * @api public
+ */
+
+module.exports = function getOwnEnumerablePropertySymbols(obj) {
+  if (typeof Object.getOwnPropertySymbols !== 'function') return [];
+
+  return Object.getOwnPropertySymbols(obj).filter(function (sym) {
+    return Object.getOwnPropertyDescriptor(obj, sym).enumerable;
+  });
+};
+
+},{}],21:[function(require,module,exports){
+/*!
+ * Chai - getProperties utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .getProperties(object)
+ *
+ * This allows the retrieval of property names of an object, enumerable or not,
+ * inherited or not.
+ *
+ * @param {Object} object
+ * @returns {Array}
+ * @namespace Utils
+ * @name getProperties
+ * @api public
+ */
+
+module.exports = function getProperties(object) {
+  var result = Object.getOwnPropertyNames(object);
+
+  function addProperty(property) {
+    if (result.indexOf(property) === -1) {
+      result.push(property);
+    }
+  }
+
+  var proto = Object.getPrototypeOf(object);
+  while (proto !== null) {
+    Object.getOwnPropertyNames(proto).forEach(addProperty);
+    proto = Object.getPrototypeOf(proto);
+  }
+
+  return result;
+};
+
+},{}],22:[function(require,module,exports){
+/*!
+ * chai
+ * Copyright(c) 2011 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/*!
+ * Dependencies that are used for multiple exports are required here only once
+ */
+
+var pathval = require('pathval');
+
+/*!
+ * test utility
+ */
+
+exports.test = require('./test');
+
+/*!
+ * type utility
+ */
+
+exports.type = require('type-detect');
+
+/*!
+ * expectTypes utility
+ */
+exports.expectTypes = require('./expectTypes');
+
+/*!
+ * message utility
+ */
+
+exports.getMessage = require('./getMessage');
+
+/*!
+ * actual utility
+ */
+
+exports.getActual = require('./getActual');
+
+/*!
+ * Inspect util
+ */
+
+exports.inspect = require('./inspect');
+
+/*!
+ * Object Display util
+ */
+
+exports.objDisplay = require('./objDisplay');
+
+/*!
+ * Flag utility
+ */
+
+exports.flag = require('./flag');
+
+/*!
+ * Flag transferring utility
+ */
+
+exports.transferFlags = require('./transferFlags');
+
+/*!
+ * Deep equal utility
+ */
+
+exports.eql = require('deep-eql');
+
+/*!
+ * Deep path info
+ */
+
+exports.getPathInfo = pathval.getPathInfo;
+
+/*!
+ * Check if a property exists
+ */
+
+exports.hasProperty = pathval.hasProperty;
+
+/*!
+ * Function name
+ */
+
+exports.getName = require('get-func-name');
+
+/*!
+ * add Property
+ */
+
+exports.addProperty = require('./addProperty');
+
+/*!
+ * add Method
+ */
+
+exports.addMethod = require('./addMethod');
+
+/*!
+ * overwrite Property
+ */
+
+exports.overwriteProperty = require('./overwriteProperty');
+
+/*!
+ * overwrite Method
+ */
+
+exports.overwriteMethod = require('./overwriteMethod');
+
+/*!
+ * Add a chainable method
+ */
+
+exports.addChainableMethod = require('./addChainableMethod');
+
+/*!
+ * Overwrite chainable method
+ */
+
+exports.overwriteChainableMethod = require('./overwriteChainableMethod');
+
+/*!
+ * Compare by inspect method
+ */
+
+exports.compareByInspect = require('./compareByInspect');
+
+/*!
+ * Get own enumerable property symbols method
+ */
+
+exports.getOwnEnumerablePropertySymbols = require('./getOwnEnumerablePropertySymbols');
+
+/*!
+ * Get own enumerable properties method
+ */
+
+exports.getOwnEnumerableProperties = require('./getOwnEnumerableProperties');
+
+/*!
+ * Checks error against a given set of criteria
+ */
+
+exports.checkError = require('check-error');
+
+/*!
+ * Proxify util
+ */
+
+exports.proxify = require('./proxify');
+
+/*!
+ * addLengthGuard util
+ */
+
+exports.addLengthGuard = require('./addLengthGuard');
+
+/*!
+ * isProxyEnabled helper
+ */
+
+exports.isProxyEnabled = require('./isProxyEnabled');
+
+/*!
+ * isNaN method
+ */
+
+exports.isNaN = require('./isNaN');
+
+},{"./addChainableMethod":9,"./addLengthGuard":10,"./addMethod":11,"./addProperty":12,"./compareByInspect":13,"./expectTypes":14,"./flag":15,"./getActual":16,"./getMessage":18,"./getOwnEnumerableProperties":19,"./getOwnEnumerablePropertySymbols":20,"./inspect":23,"./isNaN":24,"./isProxyEnabled":25,"./objDisplay":26,"./overwriteChainableMethod":27,"./overwriteMethod":28,"./overwriteProperty":29,"./proxify":30,"./test":31,"./transferFlags":32,"check-error":34,"deep-eql":35,"get-func-name":36,"pathval":37,"type-detect":38}],23:[function(require,module,exports){
+// This is (almost) directly from Node.js utils
+// https://github.com/joyent/node/blob/f8c335d0caf47f16d31413f89aa28eda3878e3aa/lib/util.js
+
+var getName = require('get-func-name');
+var getProperties = require('./getProperties');
+var getEnumerableProperties = require('./getEnumerableProperties');
+var config = require('../config');
+
+module.exports = inspect;
+
+/**
+ * ### .inspect(obj, [showHidden], [depth], [colors])
+ *
+ * Echoes the value of a value. Tries to print the value out
+ * in the best way possible given the different types.
+ *
+ * @param {Object} obj The object to print out.
+ * @param {Boolean} showHidden Flag that shows hidden (not enumerable)
+ *    properties of objects. Default is false.
+ * @param {Number} depth Depth in which to descend in object. Default is 2.
+ * @param {Boolean} colors Flag to turn on ANSI escape codes to color the
+ *    output. Default is false (no coloring).
+ * @namespace Utils
+ * @name inspect
+ */
+function inspect(obj, showHidden, depth, colors) {
+  var ctx = {
+    showHidden: showHidden,
+    seen: [],
+    stylize: function (str) { return str; }
+  };
+  return formatValue(ctx, obj, (typeof depth === 'undefined' ? 2 : depth));
+}
+
+// Returns true if object is a DOM element.
+var isDOMElement = function (object) {
+  if (typeof HTMLElement === 'object') {
+    return object instanceof HTMLElement;
+  } else {
+    return object &&
+      typeof object === 'object' &&
+      'nodeType' in object &&
+      object.nodeType === 1 &&
+      typeof object.nodeName === 'string';
+  }
+};
+
+function formatValue(ctx, value, recurseTimes) {
+  // Provide a hook for user-specified inspect functions.
+  // Check that value is an object with an inspect function on it
+  if (value && typeof value.inspect === 'function' &&
+      // Filter out the util module, it's inspect function is special
+      value.inspect !== exports.inspect &&
+      // Also filter out any prototype objects using the circular check.
+      !(value.constructor && value.constructor.prototype === value)) {
+    var ret = value.inspect(recurseTimes, ctx);
+    if (typeof ret !== 'string') {
+      ret = formatValue(ctx, ret, recurseTimes);
+    }
+    return ret;
+  }
+
+  // Primitive types cannot have properties
+  var primitive = formatPrimitive(ctx, value);
+  if (primitive) {
+    return primitive;
+  }
+
+  // If this is a DOM element, try to get the outer HTML.
+  if (isDOMElement(value)) {
+    if ('outerHTML' in value) {
+      return value.outerHTML;
+      // This value does not have an outerHTML attribute,
+      //   it could still be an XML element
+    } else {
+      // Attempt to serialize it
+      try {
+        if (document.xmlVersion) {
+          var xmlSerializer = new XMLSerializer();
+          return xmlSerializer.serializeToString(value);
+        } else {
+          // Firefox 11- do not support outerHTML
+          //   It does, however, support innerHTML
+          //   Use the following to render the element
+          var ns = "http://www.w3.org/1999/xhtml";
+          var container = document.createElementNS(ns, '_');
+
+          container.appendChild(value.cloneNode(false));
+          var html = container.innerHTML
+            .replace('><', '>' + value.innerHTML + '<');
+          container.innerHTML = '';
+          return html;
+        }
+      } catch (err) {
+        // This could be a non-native DOM implementation,
+        //   continue with the normal flow:
+        //   printing the element as if it is an object.
+      }
+    }
+  }
+
+  // Look up the keys of the object.
+  var visibleKeys = getEnumerableProperties(value);
+  var keys = ctx.showHidden ? getProperties(value) : visibleKeys;
+
+  var name, nameSuffix;
+
+  // Some type of object without properties can be shortcut.
+  // In IE, errors have a single `stack` property, or if they are vanilla `Error`,
+  // a `stack` plus `description` property; ignore those for consistency.
+  if (keys.length === 0 || (isError(value) && (
+      (keys.length === 1 && keys[0] === 'stack') ||
+      (keys.length === 2 && keys[0] === 'description' && keys[1] === 'stack')
+     ))) {
+    if (typeof value === 'function') {
+      name = getName(value);
+      nameSuffix = name ? ': ' + name : '';
+      return ctx.stylize('[Function' + nameSuffix + ']', 'special');
+    }
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    }
+    if (isDate(value)) {
+      return ctx.stylize(Date.prototype.toUTCString.call(value), 'date');
+    }
+    if (isError(value)) {
+      return formatError(value);
+    }
+  }
+
+  var base = ''
+    , array = false
+    , typedArray = false
+    , braces = ['{', '}'];
+
+  if (isTypedArray(value)) {
+    typedArray = true;
+    braces = ['[', ']'];
+  }
+
+  // Make Array say that they are Array
+  if (isArray(value)) {
+    array = true;
+    braces = ['[', ']'];
+  }
+
+  // Make functions say that they are functions
+  if (typeof value === 'function') {
+    name = getName(value);
+    nameSuffix = name ? ': ' + name : '';
+    base = ' [Function' + nameSuffix + ']';
+  }
+
+  // Make RegExps say that they are RegExps
+  if (isRegExp(value)) {
+    base = ' ' + RegExp.prototype.toString.call(value);
+  }
+
+  // Make dates with properties first say the date
+  if (isDate(value)) {
+    base = ' ' + Date.prototype.toUTCString.call(value);
+  }
+
+  // Make error with message first say the error
+  if (isError(value)) {
+    return formatError(value);
+  }
+
+  if (keys.length === 0 && (!array || value.length == 0)) {
+    return braces[0] + base + braces[1];
+  }
+
+  if (recurseTimes < 0) {
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    } else {
+      return ctx.stylize('[Object]', 'special');
+    }
+  }
+
+  ctx.seen.push(value);
+
+  var output;
+  if (array) {
+    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
+  } else if (typedArray) {
+    return formatTypedArray(value);
+  } else {
+    output = keys.map(function(key) {
+      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
+    });
+  }
+
+  ctx.seen.pop();
+
+  return reduceToSingleString(output, base, braces);
+}
+
+function formatPrimitive(ctx, value) {
+  switch (typeof value) {
+    case 'undefined':
+      return ctx.stylize('undefined', 'undefined');
+
+    case 'string':
+      var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
+                                               .replace(/'/g, "\\'")
+                                               .replace(/\\"/g, '"') + '\'';
+      return ctx.stylize(simple, 'string');
+
+    case 'number':
+      if (value === 0 && (1/value) === -Infinity) {
+        return ctx.stylize('-0', 'number');
+      }
+      return ctx.stylize('' + value, 'number');
+
+    case 'boolean':
+      return ctx.stylize('' + value, 'boolean');
+
+    case 'symbol':
+      return ctx.stylize(value.toString(), 'symbol');
+  }
+  // For some reason typeof null is "object", so special case here.
+  if (value === null) {
+    return ctx.stylize('null', 'null');
+  }
+}
+
+function formatError(value) {
+  return '[' + Error.prototype.toString.call(value) + ']';
+}
+
+function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
+  var output = [];
+  for (var i = 0, l = value.length; i < l; ++i) {
+    if (Object.prototype.hasOwnProperty.call(value, String(i))) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          String(i), true));
+    } else {
+      output.push('');
+    }
+  }
+
+  keys.forEach(function(key) {
+    if (!key.match(/^\d+$/)) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          key, true));
+    }
+  });
+  return output;
+}
+
+function formatTypedArray(value) {
+  var str = '[ ';
+
+  for (var i = 0; i < value.length; ++i) {
+    if (str.length >= config.truncateThreshold - 7) {
+      str += '...';
+      break;
+    }
+    str += value[i] + ', ';
+  }
+  str += ' ]';
+
+  // Removing trailing `, ` if the array was not truncated
+  if (str.indexOf(',  ]') !== -1) {
+    str = str.replace(',  ]', ' ]');
+  }
+
+  return str;
+}
+
+function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
+  var name;
+  var propDescriptor = Object.getOwnPropertyDescriptor(value, key);
+  var str;
+
+  if (propDescriptor) {
+    if (propDescriptor.get) {
+      if (propDescriptor.set) {
+        str = ctx.stylize('[Getter/Setter]', 'special');
+      } else {
+        str = ctx.stylize('[Getter]', 'special');
+      }
+    } else {
+      if (propDescriptor.set) {
+        str = ctx.stylize('[Setter]', 'special');
+      }
+    }
+  }
+  if (visibleKeys.indexOf(key) < 0) {
+    name = '[' + key + ']';
+  }
+  if (!str) {
+    if (ctx.seen.indexOf(value[key]) < 0) {
+      if (recurseTimes === null) {
+        str = formatValue(ctx, value[key], null);
+      } else {
+        str = formatValue(ctx, value[key], recurseTimes - 1);
+      }
+      if (str.indexOf('\n') > -1) {
+        if (array) {
+          str = str.split('\n').map(function(line) {
+            return '  ' + line;
+          }).join('\n').substr(2);
+        } else {
+          str = '\n' + str.split('\n').map(function(line) {
+            return '   ' + line;
+          }).join('\n');
+        }
+      }
+    } else {
+      str = ctx.stylize('[Circular]', 'special');
+    }
+  }
+  if (typeof name === 'undefined') {
+    if (array && key.match(/^\d+$/)) {
+      return str;
+    }
+    name = JSON.stringify('' + key);
+    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
+      name = name.substr(1, name.length - 2);
+      name = ctx.stylize(name, 'name');
+    } else {
+      name = name.replace(/'/g, "\\'")
+                 .replace(/\\"/g, '"')
+                 .replace(/(^"|"$)/g, "'");
+      name = ctx.stylize(name, 'string');
+    }
+  }
+
+  return name + ': ' + str;
+}
+
+function reduceToSingleString(output, base, braces) {
+  var length = output.reduce(function(prev, cur) {
+    return prev + cur.length + 1;
+  }, 0);
+
+  if (length > 60) {
+    return braces[0] +
+           (base === '' ? '' : base + '\n ') +
+           ' ' +
+           output.join(',\n  ') +
+           ' ' +
+           braces[1];
+  }
+
+  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
+}
+
+function isTypedArray(ar) {
+  // Unfortunately there's no way to check if an object is a TypedArray
+  // We have to check if it's one of these types
+  return (typeof ar === 'object' && /\w+Array]$/.test(objectToString(ar)));
+}
+
+function isArray(ar) {
+  return Array.isArray(ar) ||
+         (typeof ar === 'object' && objectToString(ar) === '[object Array]');
+}
+
+function isRegExp(re) {
+  return typeof re === 'object' && objectToString(re) === '[object RegExp]';
+}
+
+function isDate(d) {
+  return typeof d === 'object' && objectToString(d) === '[object Date]';
+}
+
+function isError(e) {
+  return typeof e === 'object' && objectToString(e) === '[object Error]';
+}
+
+function objectToString(o) {
+  return Object.prototype.toString.call(o);
+}
+
+},{"../config":4,"./getEnumerableProperties":17,"./getProperties":21,"get-func-name":36}],24:[function(require,module,exports){
+/*!
+ * Chai - isNaN utility
+ * Copyright(c) 2012-2015 Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .isNaN(value)
+ *
+ * Checks if the given value is NaN or not.
+ *
+ *     utils.isNaN(NaN); // true
+ *
+ * @param {Value} The value which has to be checked if it is NaN
+ * @name isNaN
+ * @api private
+ */
+
+function isNaN(value) {
+  // Refer http://www.ecma-international.org/ecma-262/6.0/#sec-isnan-number
+  // section's NOTE.
+  return value !== value;
+}
+
+// If ECMAScript 6's Number.isNaN is present, prefer that.
+module.exports = Number.isNaN || isNaN;
+
+},{}],25:[function(require,module,exports){
+var config = require('../config');
+
+/*!
+ * Chai - isProxyEnabled helper
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .isProxyEnabled()
+ *
+ * Helper function to check if Chai's proxy protection feature is enabled. If
+ * proxies are unsupported or disabled via the user's Chai config, then return
+ * false. Otherwise, return true.
+ *
+ * @namespace Utils
+ * @name isProxyEnabled
+ */
+
+module.exports = function isProxyEnabled() {
+  return config.useProxy &&
+    typeof Proxy !== 'undefined' &&
+    typeof Reflect !== 'undefined';
+};
+
+},{"../config":4}],26:[function(require,module,exports){
+/*!
+ * Chai - flag utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/*!
+ * Module dependencies
+ */
+
+var inspect = require('./inspect');
+var config = require('../config');
+
+/**
+ * ### .objDisplay(object)
+ *
+ * Determines if an object or an array matches
+ * criteria to be inspected in-line for error
+ * messages or should be truncated.
+ *
+ * @param {Mixed} javascript object to inspect
+ * @name objDisplay
+ * @namespace Utils
+ * @api public
+ */
+
+module.exports = function objDisplay(obj) {
+  var str = inspect(obj)
+    , type = Object.prototype.toString.call(obj);
+
+  if (config.truncateThreshold && str.length >= config.truncateThreshold) {
+    if (type === '[object Function]') {
+      return !obj.name || obj.name === ''
+        ? '[Function]'
+        : '[Function: ' + obj.name + ']';
+    } else if (type === '[object Array]') {
+      return '[ Array(' + obj.length + ') ]';
+    } else if (type === '[object Object]') {
+      var keys = Object.keys(obj)
+        , kstr = keys.length > 2
+          ? keys.splice(0, 2).join(', ') + ', ...'
+          : keys.join(', ');
+      return '{ Object (' + kstr + ') }';
+    } else {
+      return str;
+    }
+  } else {
+    return str;
+  }
+};
+
+},{"../config":4,"./inspect":23}],27:[function(require,module,exports){
+/*!
+ * Chai - overwriteChainableMethod utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+var chai = require('../../chai');
+var transferFlags = require('./transferFlags');
+
+/**
+ * ### .overwriteChainableMethod(ctx, name, method, chainingBehavior)
+ *
+ * Overwrites an already existing chainable method
+ * and provides access to the previous function or
+ * property.  Must return functions to be used for
+ * name.
+ *
+ *     utils.overwriteChainableMethod(chai.Assertion.prototype, 'lengthOf',
+ *       function (_super) {
+ *       }
+ *     , function (_super) {
+ *       }
+ *     );
+ *
+ * Can also be accessed directly from `chai.Assertion`.
+ *
+ *     chai.Assertion.overwriteChainableMethod('foo', fn, fn);
+ *
+ * Then can be used as any other assertion.
+ *
+ *     expect(myFoo).to.have.lengthOf(3);
+ *     expect(myFoo).to.have.lengthOf.above(3);
+ *
+ * @param {Object} ctx object whose method / property is to be overwritten
+ * @param {String} name of method / property to overwrite
+ * @param {Function} method function that returns a function to be used for name
+ * @param {Function} chainingBehavior function that returns a function to be used for property
+ * @namespace Utils
+ * @name overwriteChainableMethod
+ * @api public
+ */
+
+module.exports = function overwriteChainableMethod(ctx, name, method, chainingBehavior) {
+  var chainableBehavior = ctx.__methods[name];
+
+  var _chainingBehavior = chainableBehavior.chainingBehavior;
+  chainableBehavior.chainingBehavior = function overwritingChainableMethodGetter() {
+    var result = chainingBehavior(_chainingBehavior).call(this);
+    if (result !== undefined) {
+      return result;
+    }
+
+    var newAssertion = new chai.Assertion();
+    transferFlags(this, newAssertion);
+    return newAssertion;
+  };
+
+  var _method = chainableBehavior.method;
+  chainableBehavior.method = function overwritingChainableMethodWrapper() {
+    var result = method(_method).apply(this, arguments);
+    if (result !== undefined) {
+      return result;
+    }
+
+    var newAssertion = new chai.Assertion();
+    transferFlags(this, newAssertion);
+    return newAssertion;
+  };
+};
+
+},{"../../chai":2,"./transferFlags":32}],28:[function(require,module,exports){
+/*!
+ * Chai - overwriteMethod utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+var addLengthGuard = require('./addLengthGuard');
+var chai = require('../../chai');
+var flag = require('./flag');
+var proxify = require('./proxify');
+var transferFlags = require('./transferFlags');
+
+/**
+ * ### .overwriteMethod(ctx, name, fn)
+ *
+ * Overwrites an already existing method and provides
+ * access to previous function. Must return function
+ * to be used for name.
+ *
+ *     utils.overwriteMethod(chai.Assertion.prototype, 'equal', function (_super) {
+ *       return function (str) {
+ *         var obj = utils.flag(this, 'object');
+ *         if (obj instanceof Foo) {
+ *           new chai.Assertion(obj.value).to.equal(str);
+ *         } else {
+ *           _super.apply(this, arguments);
+ *         }
+ *       }
+ *     });
+ *
+ * Can also be accessed directly from `chai.Assertion`.
+ *
+ *     chai.Assertion.overwriteMethod('foo', fn);
+ *
+ * Then can be used as any other assertion.
+ *
+ *     expect(myFoo).to.equal('bar');
+ *
+ * @param {Object} ctx object whose method is to be overwritten
+ * @param {String} name of method to overwrite
+ * @param {Function} method function that returns a function to be used for name
+ * @namespace Utils
+ * @name overwriteMethod
+ * @api public
+ */
+
+module.exports = function overwriteMethod(ctx, name, method) {
+  var _method = ctx[name]
+    , _super = function () {
+      throw new Error(name + ' is not a function');
+    };
+
+  if (_method && 'function' === typeof _method)
+    _super = _method;
+
+  var overwritingMethodWrapper = function () {
+    // Setting the `ssfi` flag to `overwritingMethodWrapper` causes this
+    // function to be the starting point for removing implementation frames from
+    // the stack trace of a failed assertion.
+    //
+    // However, we only want to use this function as the starting point if the
+    // `lockSsfi` flag isn't set.
+    //
+    // If the `lockSsfi` flag is set, then either this assertion has been
+    // overwritten by another assertion, or this assertion is being invoked from
+    // inside of another assertion. In the first case, the `ssfi` flag has
+    // already been set by the overwriting assertion. In the second case, the
+    // `ssfi` flag has already been set by the outer assertion.
+    if (!flag(this, 'lockSsfi')) {
+      flag(this, 'ssfi', overwritingMethodWrapper);
+    }
+
+    // Setting the `lockSsfi` flag to `true` prevents the overwritten assertion
+    // from changing the `ssfi` flag. By this point, the `ssfi` flag is already
+    // set to the correct starting point for this assertion.
+    var origLockSsfi = flag(this, 'lockSsfi');
+    flag(this, 'lockSsfi', true);
+    var result = method(_super).apply(this, arguments);
+    flag(this, 'lockSsfi', origLockSsfi);
+
+    if (result !== undefined) {
+      return result;
+    }
+
+    var newAssertion = new chai.Assertion();
+    transferFlags(this, newAssertion);
+    return newAssertion;
+  }
+
+  addLengthGuard(overwritingMethodWrapper, name, false);
+  ctx[name] = proxify(overwritingMethodWrapper, name);
+};
+
+},{"../../chai":2,"./addLengthGuard":10,"./flag":15,"./proxify":30,"./transferFlags":32}],29:[function(require,module,exports){
+/*!
+ * Chai - overwriteProperty utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+var chai = require('../../chai');
+var flag = require('./flag');
+var isProxyEnabled = require('./isProxyEnabled');
+var transferFlags = require('./transferFlags');
+
+/**
+ * ### .overwriteProperty(ctx, name, fn)
+ *
+ * Overwrites an already existing property getter and provides
+ * access to previous value. Must return function to use as getter.
+ *
+ *     utils.overwriteProperty(chai.Assertion.prototype, 'ok', function (_super) {
+ *       return function () {
+ *         var obj = utils.flag(this, 'object');
+ *         if (obj instanceof Foo) {
+ *           new chai.Assertion(obj.name).to.equal('bar');
+ *         } else {
+ *           _super.call(this);
+ *         }
+ *       }
+ *     });
+ *
+ *
+ * Can also be accessed directly from `chai.Assertion`.
+ *
+ *     chai.Assertion.overwriteProperty('foo', fn);
+ *
+ * Then can be used as any other assertion.
+ *
+ *     expect(myFoo).to.be.ok;
+ *
+ * @param {Object} ctx object whose property is to be overwritten
+ * @param {String} name of property to overwrite
+ * @param {Function} getter function that returns a getter function to be used for name
+ * @namespace Utils
+ * @name overwriteProperty
+ * @api public
+ */
+
+module.exports = function overwriteProperty(ctx, name, getter) {
+  var _get = Object.getOwnPropertyDescriptor(ctx, name)
+    , _super = function () {};
+
+  if (_get && 'function' === typeof _get.get)
+    _super = _get.get
+
+  Object.defineProperty(ctx, name,
+    { get: function overwritingPropertyGetter() {
+        // Setting the `ssfi` flag to `overwritingPropertyGetter` causes this
+        // function to be the starting point for removing implementation frames
+        // from the stack trace of a failed assertion.
+        //
+        // However, we only want to use this function as the starting point if
+        // the `lockSsfi` flag isn't set and proxy protection is disabled.
+        //
+        // If the `lockSsfi` flag is set, then either this assertion has been
+        // overwritten by another assertion, or this assertion is being invoked
+        // from inside of another assertion. In the first case, the `ssfi` flag
+        // has already been set by the overwriting assertion. In the second
+        // case, the `ssfi` flag has already been set by the outer assertion.
+        //
+        // If proxy protection is enabled, then the `ssfi` flag has already been
+        // set by the proxy getter.
+        if (!isProxyEnabled() && !flag(this, 'lockSsfi')) {
+          flag(this, 'ssfi', overwritingPropertyGetter);
+        }
+
+        // Setting the `lockSsfi` flag to `true` prevents the overwritten
+        // assertion from changing the `ssfi` flag. By this point, the `ssfi`
+        // flag is already set to the correct starting point for this assertion.
+        var origLockSsfi = flag(this, 'lockSsfi');
+        flag(this, 'lockSsfi', true);
+        var result = getter(_super).call(this);
+        flag(this, 'lockSsfi', origLockSsfi);
+
+        if (result !== undefined) {
+          return result;
+        }
+
+        var newAssertion = new chai.Assertion();
+        transferFlags(this, newAssertion);
+        return newAssertion;
+      }
+    , configurable: true
+  });
+};
+
+},{"../../chai":2,"./flag":15,"./isProxyEnabled":25,"./transferFlags":32}],30:[function(require,module,exports){
+var config = require('../config');
+var flag = require('./flag');
+var getProperties = require('./getProperties');
+var isProxyEnabled = require('./isProxyEnabled');
+
+/*!
+ * Chai - proxify utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .proxify(object)
+ *
+ * Return a proxy of given object that throws an error when a non-existent
+ * property is read. By default, the root cause is assumed to be a misspelled
+ * property, and thus an attempt is made to offer a reasonable suggestion from
+ * the list of existing properties. However, if a nonChainableMethodName is
+ * provided, then the root cause is instead a failure to invoke a non-chainable
+ * method prior to reading the non-existent property.
+ *
+ * If proxies are unsupported or disabled via the user's Chai config, then
+ * return object without modification.
+ *
+ * @param {Object} obj
+ * @param {String} nonChainableMethodName
+ * @namespace Utils
+ * @name proxify
+ */
+
+var builtins = ['__flags', '__methods', '_obj', 'assert'];
+
+module.exports = function proxify(obj, nonChainableMethodName) {
+  if (!isProxyEnabled()) return obj;
+
+  return new Proxy(obj, {
+    get: function proxyGetter(target, property) {
+      // This check is here because we should not throw errors on Symbol properties
+      // such as `Symbol.toStringTag`.
+      // The values for which an error should be thrown can be configured using
+      // the `config.proxyExcludedKeys` setting.
+      if (typeof property === 'string' &&
+          config.proxyExcludedKeys.indexOf(property) === -1 &&
+          !Reflect.has(target, property)) {
+        // Special message for invalid property access of non-chainable methods.
+        if (nonChainableMethodName) {
+          throw Error('Invalid Chai property: ' + nonChainableMethodName + '.' +
+            property + '. See docs for proper usage of "' +
+            nonChainableMethodName + '".');
+        }
+
+        // If the property is reasonably close to an existing Chai property,
+        // suggest that property to the user. Only suggest properties with a
+        // distance less than 4.
+        var suggestion = null;
+        var suggestionDistance = 4;
+        getProperties(target).forEach(function(prop) {
+          if (
+            !Object.prototype.hasOwnProperty(prop) &&
+            builtins.indexOf(prop) === -1
+          ) {
+            var dist = stringDistanceCapped(
+              property,
+              prop,
+              suggestionDistance
+            );
+            if (dist < suggestionDistance) {
+              suggestion = prop;
+              suggestionDistance = dist;
+            }
+          }
+        });
+
+        if (suggestion !== null) {
+          throw Error('Invalid Chai property: ' + property +
+            '. Did you mean "' + suggestion + '"?');
+        } else {
+          throw Error('Invalid Chai property: ' + property);
+        }
+      }
+
+      // Use this proxy getter as the starting point for removing implementation
+      // frames from the stack trace of a failed assertion. For property
+      // assertions, this prevents the proxy getter from showing up in the stack
+      // trace since it's invoked before the property getter. For method and
+      // chainable method assertions, this flag will end up getting changed to
+      // the method wrapper, which is good since this frame will no longer be in
+      // the stack once the method is invoked. Note that Chai builtin assertion
+      // properties such as `__flags` are skipped since this is only meant to
+      // capture the starting point of an assertion. This step is also skipped
+      // if the `lockSsfi` flag is set, thus indicating that this assertion is
+      // being called from within another assertion. In that case, the `ssfi`
+      // flag is already set to the outer assertion's starting point.
+      if (builtins.indexOf(property) === -1 && !flag(target, 'lockSsfi')) {
+        flag(target, 'ssfi', proxyGetter);
+      }
+
+      return Reflect.get(target, property);
+    }
+  });
+};
+
+/**
+ * # stringDistanceCapped(strA, strB, cap)
+ * Return the Levenshtein distance between two strings, but no more than cap.
+ * @param {string} strA
+ * @param {string} strB
+ * @param {number} number
+ * @return {number} min(string distance between strA and strB, cap)
+ * @api private
+ */
+
+function stringDistanceCapped(strA, strB, cap) {
+  if (Math.abs(strA.length - strB.length) >= cap) {
+    return cap;
+  }
+
+  var memo = [];
+  // `memo` is a two-dimensional array containing distances.
+  // memo[i][j] is the distance between strA.slice(0, i) and
+  // strB.slice(0, j).
+  for (var i = 0; i <= strA.length; i++) {
+    memo[i] = Array(strB.length + 1).fill(0);
+    memo[i][0] = i;
+  }
+  for (var j = 0; j < strB.length; j++) {
+    memo[0][j] = j;
+  }
+
+  for (var i = 1; i <= strA.length; i++) {
+    var ch = strA.charCodeAt(i - 1);
+    for (var j = 1; j <= strB.length; j++) {
+      if (Math.abs(i - j) >= cap) {
+        memo[i][j] = cap;
+        continue;
+      }
+      memo[i][j] = Math.min(
+        memo[i - 1][j] + 1,
+        memo[i][j - 1] + 1,
+        memo[i - 1][j - 1] +
+          (ch === strB.charCodeAt(j - 1) ? 0 : 1)
+      );
+    }
+  }
+
+  return memo[strA.length][strB.length];
+}
+
+},{"../config":4,"./flag":15,"./getProperties":21,"./isProxyEnabled":25}],31:[function(require,module,exports){
+/*!
+ * Chai - test utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/*!
+ * Module dependencies
+ */
+
+var flag = require('./flag');
+
+/**
+ * ### .test(object, expression)
+ *
+ * Test and object for expression.
+ *
+ * @param {Object} object (constructed Assertion)
+ * @param {Arguments} chai.Assertion.prototype.assert arguments
+ * @namespace Utils
+ * @name test
+ */
+
+module.exports = function test(obj, args) {
+  var negate = flag(obj, 'negate')
+    , expr = args[0];
+  return negate ? !expr : expr;
+};
+
+},{"./flag":15}],32:[function(require,module,exports){
+/*!
+ * Chai - transferFlags utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .transferFlags(assertion, object, includeAll = true)
+ *
+ * Transfer all the flags for `assertion` to `object`. If
+ * `includeAll` is set to `false`, then the base Chai
+ * assertion flags (namely `object`, `ssfi`, `lockSsfi`,
+ * and `message`) will not be transferred.
+ *
+ *
+ *     var newAssertion = new Assertion();
+ *     utils.transferFlags(assertion, newAssertion);
+ *
+ *     var anotherAssertion = new Assertion(myObj);
+ *     utils.transferFlags(assertion, anotherAssertion, false);
+ *
+ * @param {Assertion} assertion the assertion to transfer the flags from
+ * @param {Object} object the object to transfer the flags to; usually a new assertion
+ * @param {Boolean} includeAll
+ * @namespace Utils
+ * @name transferFlags
+ * @api private
+ */
+
+module.exports = function transferFlags(assertion, object, includeAll) {
+  var flags = assertion.__flags || (assertion.__flags = Object.create(null));
+
+  if (!object.__flags) {
+    object.__flags = Object.create(null);
+  }
+
+  includeAll = arguments.length === 3 ? includeAll : true;
+
+  for (var flag in flags) {
+    if (includeAll ||
+        (flag !== 'object' && flag !== 'ssfi' && flag !== 'lockSsfi' && flag != 'message')) {
+      object.__flags[flag] = flags[flag];
+    }
+  }
+};
+
+},{}],33:[function(require,module,exports){
+/*!
+ * assertion-error
+ * Copyright(c) 2013 Jake Luer <jake@qualiancy.com>
+ * MIT Licensed
+ */
+
+/*!
+ * Return a function that will copy properties from
+ * one object to another excluding any originally
+ * listed. Returned function will create a new `{}`.
+ *
+ * @param {String} excluded properties ...
+ * @return {Function}
+ */
+
+function exclude () {
+  var excludes = [].slice.call(arguments);
+
+  function excludeProps (res, obj) {
+    Object.keys(obj).forEach(function (key) {
+      if (!~excludes.indexOf(key)) res[key] = obj[key];
+    });
+  }
+
+  return function extendExclude () {
+    var args = [].slice.call(arguments)
+      , i = 0
+      , res = {};
+
+    for (; i < args.length; i++) {
+      excludeProps(res, args[i]);
+    }
+
+    return res;
+  };
+};
+
+/*!
+ * Primary Exports
+ */
+
+module.exports = AssertionError;
+
+/**
+ * ### AssertionError
+ *
+ * An extension of the JavaScript `Error` constructor for
+ * assertion and validation scenarios.
+ *
+ * @param {String} message
+ * @param {Object} properties to include (optional)
+ * @param {callee} start stack function (optional)
+ */
+
+function AssertionError (message, _props, ssf) {
+  var extend = exclude('name', 'message', 'stack', 'constructor', 'toJSON')
+    , props = extend(_props || {});
+
+  // default values
+  this.message = message || 'Unspecified AssertionError';
+  this.showDiff = false;
+
+  // copy from properties
+  for (var key in props) {
+    this[key] = props[key];
+  }
+
+  // capture stack trace
+  ssf = ssf || AssertionError;
+  if (Error.captureStackTrace) {
+    Error.captureStackTrace(this, ssf);
+  } else {
+    try {
+      throw new Error();
+    } catch(e) {
+      this.stack = e.stack;
+    }
+  }
+}
+
+/*!
+ * Inherit from Error.prototype
+ */
+
+AssertionError.prototype = Object.create(Error.prototype);
+
+/*!
+ * Statically set name
+ */
+
+AssertionError.prototype.name = 'AssertionError';
+
+/*!
+ * Ensure correct constructor
+ */
+
+AssertionError.prototype.constructor = AssertionError;
+
+/**
+ * Allow errors to be converted to JSON for static transfer.
+ *
+ * @param {Boolean} include stack (default: `true`)
+ * @return {Object} object that can be `JSON.stringify`
+ */
+
+AssertionError.prototype.toJSON = function (stack) {
+  var extend = exclude('constructor', 'toJSON', 'stack')
+    , props = extend({ name: this.name }, this);
+
+  // include stack if exists and not turned off
+  if (false !== stack && this.stack) {
+    props.stack = this.stack;
+  }
+
+  return props;
+};
+
+},{}],34:[function(require,module,exports){
+'use strict';
+
+/* !
+ * Chai - checkError utility
+ * Copyright(c) 2012-2016 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .checkError
+ *
+ * Checks that an error conforms to a given set of criteria and/or retrieves information about it.
+ *
+ * @api public
+ */
+
+/**
+ * ### .compatibleInstance(thrown, errorLike)
+ *
+ * Checks if two instances are compatible (strict equal).
+ * Returns false if errorLike is not an instance of Error, because instances
+ * can only be compatible if they're both error instances.
+ *
+ * @name compatibleInstance
+ * @param {Error} thrown error
+ * @param {Error|ErrorConstructor} errorLike object to compare against
+ * @namespace Utils
+ * @api public
+ */
+
+function compatibleInstance(thrown, errorLike) {
+  return errorLike instanceof Error && thrown === errorLike;
+}
+
+/**
+ * ### .compatibleConstructor(thrown, errorLike)
+ *
+ * Checks if two constructors are compatible.
+ * This function can receive either an error constructor or
+ * an error instance as the `errorLike` argument.
+ * Constructors are compatible if they're the same or if one is
+ * an instance of another.
+ *
+ * @name compatibleConstructor
+ * @param {Error} thrown error
+ * @param {Error|ErrorConstructor} errorLike object to compare against
+ * @namespace Utils
+ * @api public
+ */
+
+function compatibleConstructor(thrown, errorLike) {
+  if (errorLike instanceof Error) {
+    // If `errorLike` is an instance of any error we compare their constructors
+    return thrown.constructor === errorLike.constructor || thrown instanceof errorLike.constructor;
+  } else if (errorLike.prototype instanceof Error || errorLike === Error) {
+    // If `errorLike` is a constructor that inherits from Error, we compare `thrown` to `errorLike` directly
+    return thrown.constructor === errorLike || thrown instanceof errorLike;
+  }
+
+  return false;
+}
+
+/**
+ * ### .compatibleMessage(thrown, errMatcher)
+ *
+ * Checks if an error's message is compatible with a matcher (String or RegExp).
+ * If the message contains the String or passes the RegExp test,
+ * it is considered compatible.
+ *
+ * @name compatibleMessage
+ * @param {Error} thrown error
+ * @param {String|RegExp} errMatcher to look for into the message
+ * @namespace Utils
+ * @api public
+ */
+
+function compatibleMessage(thrown, errMatcher) {
+  var comparisonString = typeof thrown === 'string' ? thrown : thrown.message;
+  if (errMatcher instanceof RegExp) {
+    return errMatcher.test(comparisonString);
+  } else if (typeof errMatcher === 'string') {
+    return comparisonString.indexOf(errMatcher) !== -1; // eslint-disable-line no-magic-numbers
+  }
+
+  return false;
+}
+
+/**
+ * ### .getFunctionName(constructorFn)
+ *
+ * Returns the name of a function.
+ * This also includes a polyfill function if `constructorFn.name` is not defined.
+ *
+ * @name getFunctionName
+ * @param {Function} constructorFn
+ * @namespace Utils
+ * @api private
+ */
+
+var functionNameMatch = /\s*function(?:\s|\s*\/\*[^(?:*\/)]+\*\/\s*)*([^\(\/]+)/;
+function getFunctionName(constructorFn) {
+  var name = '';
+  if (typeof constructorFn.name === 'undefined') {
+    // Here we run a polyfill if constructorFn.name is not defined
+    var match = String(constructorFn).match(functionNameMatch);
+    if (match) {
+      name = match[1];
+    }
+  } else {
+    name = constructorFn.name;
+  }
+
+  return name;
+}
+
+/**
+ * ### .getConstructorName(errorLike)
+ *
+ * Gets the constructor name for an Error instance or constructor itself.
+ *
+ * @name getConstructorName
+ * @param {Error|ErrorConstructor} errorLike
+ * @namespace Utils
+ * @api public
+ */
+
+function getConstructorName(errorLike) {
+  var constructorName = errorLike;
+  if (errorLike instanceof Error) {
+    constructorName = getFunctionName(errorLike.constructor);
+  } else if (typeof errorLike === 'function') {
+    // If `err` is not an instance of Error it is an error constructor itself or another function.
+    // If we've got a common function we get its name, otherwise we may need to create a new instance
+    // of the error just in case it's a poorly-constructed error. Please see chaijs/chai/issues/45 to know more.
+    constructorName = getFunctionName(errorLike).trim() ||
+        getFunctionName(new errorLike()); // eslint-disable-line new-cap
+  }
+
+  return constructorName;
+}
+
+/**
+ * ### .getMessage(errorLike)
+ *
+ * Gets the error message from an error.
+ * If `err` is a String itself, we return it.
+ * If the error has no message, we return an empty string.
+ *
+ * @name getMessage
+ * @param {Error|String} errorLike
+ * @namespace Utils
+ * @api public
+ */
+
+function getMessage(errorLike) {
+  var msg = '';
+  if (errorLike && errorLike.message) {
+    msg = errorLike.message;
+  } else if (typeof errorLike === 'string') {
+    msg = errorLike;
+  }
+
+  return msg;
+}
+
+module.exports = {
+  compatibleInstance: compatibleInstance,
+  compatibleConstructor: compatibleConstructor,
+  compatibleMessage: compatibleMessage,
+  getMessage: getMessage,
+  getConstructorName: getConstructorName,
+};
+
+},{}],35:[function(require,module,exports){
+'use strict';
+/* globals Symbol: false, Uint8Array: false, WeakMap: false */
+/*!
+ * deep-eql
+ * Copyright(c) 2013 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+var type = require('type-detect');
+function FakeMap() {
+  this._key = 'chai/deep-eql__' + Math.random() + Date.now();
+}
+
+FakeMap.prototype = {
+  get: function getMap(key) {
+    return key[this._key];
+  },
+  set: function setMap(key, value) {
+    if (Object.isExtensible(key)) {
+      Object.defineProperty(key, this._key, {
+        value: value,
+        configurable: true,
+      });
+    }
+  },
+};
+
+var MemoizeMap = typeof WeakMap === 'function' ? WeakMap : FakeMap;
+/*!
+ * Check to see if the MemoizeMap has recorded a result of the two operands
+ *
+ * @param {Mixed} leftHandOperand
+ * @param {Mixed} rightHandOperand
+ * @param {MemoizeMap} memoizeMap
+ * @returns {Boolean|null} result
+*/
+function memoizeCompare(leftHandOperand, rightHandOperand, memoizeMap) {
+  // Technically, WeakMap keys can *only* be objects, not primitives.
+  if (!memoizeMap || isPrimitive(leftHandOperand) || isPrimitive(rightHandOperand)) {
+    return null;
+  }
+  var leftHandMap = memoizeMap.get(leftHandOperand);
+  if (leftHandMap) {
+    var result = leftHandMap.get(rightHandOperand);
+    if (typeof result === 'boolean') {
+      return result;
+    }
+  }
+  return null;
+}
+
+/*!
+ * Set the result of the equality into the MemoizeMap
+ *
+ * @param {Mixed} leftHandOperand
+ * @param {Mixed} rightHandOperand
+ * @param {MemoizeMap} memoizeMap
+ * @param {Boolean} result
+*/
+function memoizeSet(leftHandOperand, rightHandOperand, memoizeMap, result) {
+  // Technically, WeakMap keys can *only* be objects, not primitives.
+  if (!memoizeMap || isPrimitive(leftHandOperand) || isPrimitive(rightHandOperand)) {
+    return;
+  }
+  var leftHandMap = memoizeMap.get(leftHandOperand);
+  if (leftHandMap) {
+    leftHandMap.set(rightHandOperand, result);
+  } else {
+    leftHandMap = new MemoizeMap();
+    leftHandMap.set(rightHandOperand, result);
+    memoizeMap.set(leftHandOperand, leftHandMap);
+  }
+}
+
+/*!
+ * Primary Export
+ */
+
+module.exports = deepEqual;
+module.exports.MemoizeMap = MemoizeMap;
+
+/**
+ * Assert deeply nested sameValue equality between two objects of any type.
+ *
+ * @param {Mixed} leftHandOperand
+ * @param {Mixed} rightHandOperand
+ * @param {Object} [options] (optional) Additional options
+ * @param {Array} [options.comparator] (optional) Override default algorithm, determining custom equality.
+ * @param {Array} [options.memoize] (optional) Provide a custom memoization object which will cache the results of
+    complex objects for a speed boost. By passing `false` you can disable memoization, but this will cause circular
+    references to blow the stack.
+ * @return {Boolean} equal match
+ */
+function deepEqual(leftHandOperand, rightHandOperand, options) {
+  // If we have a comparator, we can't assume anything; so bail to its check first.
+  if (options && options.comparator) {
+    return extensiveDeepEqual(leftHandOperand, rightHandOperand, options);
+  }
+
+  var simpleResult = simpleEqual(leftHandOperand, rightHandOperand);
+  if (simpleResult !== null) {
+    return simpleResult;
+  }
+
+  // Deeper comparisons are pushed through to a larger function
+  return extensiveDeepEqual(leftHandOperand, rightHandOperand, options);
+}
+
+/**
+ * Many comparisons can be canceled out early via simple equality or primitive checks.
+ * @param {Mixed} leftHandOperand
+ * @param {Mixed} rightHandOperand
+ * @return {Boolean|null} equal match
+ */
+function simpleEqual(leftHandOperand, rightHandOperand) {
+  // Equal references (except for Numbers) can be returned early
+  if (leftHandOperand === rightHandOperand) {
+    // Handle +-0 cases
+    return leftHandOperand !== 0 || 1 / leftHandOperand === 1 / rightHandOperand;
+  }
+
+  // handle NaN cases
+  if (
+    leftHandOperand !== leftHandOperand && // eslint-disable-line no-self-compare
+    rightHandOperand !== rightHandOperand // eslint-disable-line no-self-compare
+  ) {
+    return true;
+  }
+
+  // Anything that is not an 'object', i.e. symbols, functions, booleans, numbers,
+  // strings, and undefined, can be compared by reference.
+  if (isPrimitive(leftHandOperand) || isPrimitive(rightHandOperand)) {
+    // Easy out b/c it would have passed the first equality check
+    return false;
+  }
+  return null;
+}
+
+/*!
+ * The main logic of the `deepEqual` function.
+ *
+ * @param {Mixed} leftHandOperand
+ * @param {Mixed} rightHandOperand
+ * @param {Object} [options] (optional) Additional options
+ * @param {Array} [options.comparator] (optional) Override default algorithm, determining custom equality.
+ * @param {Array} [options.memoize] (optional) Provide a custom memoization object which will cache the results of
+    complex objects for a speed boost. By passing `false` you can disable memoization, but this will cause circular
+    references to blow the stack.
+ * @return {Boolean} equal match
+*/
+function extensiveDeepEqual(leftHandOperand, rightHandOperand, options) {
+  options = options || {};
+  options.memoize = options.memoize === false ? false : options.memoize || new MemoizeMap();
+  var comparator = options && options.comparator;
+
+  // Check if a memoized result exists.
+  var memoizeResultLeft = memoizeCompare(leftHandOperand, rightHandOperand, options.memoize);
+  if (memoizeResultLeft !== null) {
+    return memoizeResultLeft;
+  }
+  var memoizeResultRight = memoizeCompare(rightHandOperand, leftHandOperand, options.memoize);
+  if (memoizeResultRight !== null) {
+    return memoizeResultRight;
+  }
+
+  // If a comparator is present, use it.
+  if (comparator) {
+    var comparatorResult = comparator(leftHandOperand, rightHandOperand);
+    // Comparators may return null, in which case we want to go back to default behavior.
+    if (comparatorResult === false || comparatorResult === true) {
+      memoizeSet(leftHandOperand, rightHandOperand, options.memoize, comparatorResult);
+      return comparatorResult;
+    }
+    // To allow comparators to override *any* behavior, we ran them first. Since it didn't decide
+    // what to do, we need to make sure to return the basic tests first before we move on.
+    var simpleResult = simpleEqual(leftHandOperand, rightHandOperand);
+    if (simpleResult !== null) {
+      // Don't memoize this, it takes longer to set/retrieve than to just compare.
+      return simpleResult;
+    }
+  }
+
+  var leftHandType = type(leftHandOperand);
+  if (leftHandType !== type(rightHandOperand)) {
+    memoizeSet(leftHandOperand, rightHandOperand, options.memoize, false);
+    return false;
+  }
+
+  // Temporarily set the operands in the memoize object to prevent blowing the stack
+  memoizeSet(leftHandOperand, rightHandOperand, options.memoize, true);
+
+  var result = extensiveDeepEqualByType(leftHandOperand, rightHandOperand, leftHandType, options);
+  memoizeSet(leftHandOperand, rightHandOperand, options.memoize, result);
+  return result;
+}
+
+function extensiveDeepEqualByType(leftHandOperand, rightHandOperand, leftHandType, options) {
+  switch (leftHandType) {
+    case 'String':
+    case 'Number':
+    case 'Boolean':
+    case 'Date':
+      // If these types are their instance types (e.g. `new Number`) then re-deepEqual against their values
+      return deepEqual(leftHandOperand.valueOf(), rightHandOperand.valueOf());
+    case 'Promise':
+    case 'Symbol':
+    case 'function':
+    case 'WeakMap':
+    case 'WeakSet':
+    case 'Error':
+      return leftHandOperand === rightHandOperand;
+    case 'Arguments':
+    case 'Int8Array':
+    case 'Uint8Array':
+    case 'Uint8ClampedArray':
+    case 'Int16Array':
+    case 'Uint16Array':
+    case 'Int32Array':
+    case 'Uint32Array':
+    case 'Float32Array':
+    case 'Float64Array':
+    case 'Array':
+      return iterableEqual(leftHandOperand, rightHandOperand, options);
+    case 'RegExp':
+      return regexpEqual(leftHandOperand, rightHandOperand);
+    case 'Generator':
+      return generatorEqual(leftHandOperand, rightHandOperand, options);
+    case 'DataView':
+      return iterableEqual(new Uint8Array(leftHandOperand.buffer), new Uint8Array(rightHandOperand.buffer), options);
+    case 'ArrayBuffer':
+      return iterableEqual(new Uint8Array(leftHandOperand), new Uint8Array(rightHandOperand), options);
+    case 'Set':
+      return entriesEqual(leftHandOperand, rightHandOperand, options);
+    case 'Map':
+      return entriesEqual(leftHandOperand, rightHandOperand, options);
+    default:
+      return objectEqual(leftHandOperand, rightHandOperand, options);
+  }
+}
+
+/*!
+ * Compare two Regular Expressions for equality.
+ *
+ * @param {RegExp} leftHandOperand
+ * @param {RegExp} rightHandOperand
+ * @return {Boolean} result
+ */
+
+function regexpEqual(leftHandOperand, rightHandOperand) {
+  return leftHandOperand.toString() === rightHandOperand.toString();
+}
+
+/*!
+ * Compare two Sets/Maps for equality. Faster than other equality functions.
+ *
+ * @param {Set} leftHandOperand
+ * @param {Set} rightHandOperand
+ * @param {Object} [options] (Optional)
+ * @return {Boolean} result
+ */
+
+function entriesEqual(leftHandOperand, rightHandOperand, options) {
+  // IE11 doesn't support Set#entries or Set#@@iterator, so we need manually populate using Set#forEach
+  if (leftHandOperand.size !== rightHandOperand.size) {
+    return false;
+  }
+  if (leftHandOperand.size === 0) {
+    return true;
+  }
+  var leftHandItems = [];
+  var rightHandItems = [];
+  leftHandOperand.forEach(function gatherEntries(key, value) {
+    leftHandItems.push([ key, value ]);
+  });
+  rightHandOperand.forEach(function gatherEntries(key, value) {
+    rightHandItems.push([ key, value ]);
+  });
+  return iterableEqual(leftHandItems.sort(), rightHandItems.sort(), options);
+}
+
+/*!
+ * Simple equality for flat iterable objects such as Arrays, TypedArrays or Node.js buffers.
+ *
+ * @param {Iterable} leftHandOperand
+ * @param {Iterable} rightHandOperand
+ * @param {Object} [options] (Optional)
+ * @return {Boolean} result
+ */
+
+function iterableEqual(leftHandOperand, rightHandOperand, options) {
+  var length = leftHandOperand.length;
+  if (length !== rightHandOperand.length) {
+    return false;
+  }
+  if (length === 0) {
+    return true;
+  }
+  var index = -1;
+  while (++index < length) {
+    if (deepEqual(leftHandOperand[index], rightHandOperand[index], options) === false) {
+      return false;
+    }
+  }
+  return true;
+}
+
+/*!
+ * Simple equality for generator objects such as those returned by generator functions.
+ *
+ * @param {Iterable} leftHandOperand
+ * @param {Iterable} rightHandOperand
+ * @param {Object} [options] (Optional)
+ * @return {Boolean} result
+ */
+
+function generatorEqual(leftHandOperand, rightHandOperand, options) {
+  return iterableEqual(getGeneratorEntries(leftHandOperand), getGeneratorEntries(rightHandOperand), options);
+}
+
+/*!
+ * Determine if the given object has an @@iterator function.
+ *
+ * @param {Object} target
+ * @return {Boolean} `true` if the object has an @@iterator function.
+ */
+function hasIteratorFunction(target) {
+  return typeof Symbol !== 'undefined' &&
+    typeof target === 'object' &&
+    typeof Symbol.iterator !== 'undefined' &&
+    typeof target[Symbol.iterator] === 'function';
+}
+
+/*!
+ * Gets all iterator entries from the given Object. If the Object has no @@iterator function, returns an empty array.
+ * This will consume the iterator - which could have side effects depending on the @@iterator implementation.
+ *
+ * @param {Object} target
+ * @returns {Array} an array of entries from the @@iterator function
+ */
+function getIteratorEntries(target) {
+  if (hasIteratorFunction(target)) {
+    try {
+      return getGeneratorEntries(target[Symbol.iterator]());
+    } catch (iteratorError) {
+      return [];
+    }
+  }
+  return [];
+}
+
+/*!
+ * Gets all entries from a Generator. This will consume the generator - which could have side effects.
+ *
+ * @param {Generator} target
+ * @returns {Array} an array of entries from the Generator.
+ */
+function getGeneratorEntries(generator) {
+  var generatorResult = generator.next();
+  var accumulator = [ generatorResult.value ];
+  while (generatorResult.done === false) {
+    generatorResult = generator.next();
+    accumulator.push(generatorResult.value);
+  }
+  return accumulator;
+}
+
+/*!
+ * Gets all own and inherited enumerable keys from a target.
+ *
+ * @param {Object} target
+ * @returns {Array} an array of own and inherited enumerable keys from the target.
+ */
+function getEnumerableKeys(target) {
+  var keys = [];
+  for (var key in target) {
+    keys.push(key);
+  }
+  return keys;
+}
+
+/*!
+ * Determines if two objects have matching values, given a set of keys. Defers to deepEqual for the equality check of
+ * each key. If any value of the given key is not equal, the function will return false (early).
+ *
+ * @param {Mixed} leftHandOperand
+ * @param {Mixed} rightHandOperand
+ * @param {Array} keys An array of keys to compare the values of leftHandOperand and rightHandOperand against
+ * @param {Object} [options] (Optional)
+ * @return {Boolean} result
+ */
+function keysEqual(leftHandOperand, rightHandOperand, keys, options) {
+  var length = keys.length;
+  if (length === 0) {
+    return true;
+  }
+  for (var i = 0; i < length; i += 1) {
+    if (deepEqual(leftHandOperand[keys[i]], rightHandOperand[keys[i]], options) === false) {
+      return false;
+    }
+  }
+  return true;
+}
+
+/*!
+ * Recursively check the equality of two Objects. Once basic sameness has been established it will defer to `deepEqual`
+ * for each enumerable key in the object.
+ *
+ * @param {Mixed} leftHandOperand
+ * @param {Mixed} rightHandOperand
+ * @param {Object} [options] (Optional)
+ * @return {Boolean} result
+ */
+
+function objectEqual(leftHandOperand, rightHandOperand, options) {
+  var leftHandKeys = getEnumerableKeys(leftHandOperand);
+  var rightHandKeys = getEnumerableKeys(rightHandOperand);
+  if (leftHandKeys.length && leftHandKeys.length === rightHandKeys.length) {
+    leftHandKeys.sort();
+    rightHandKeys.sort();
+    if (iterableEqual(leftHandKeys, rightHandKeys) === false) {
+      return false;
+    }
+    return keysEqual(leftHandOperand, rightHandOperand, leftHandKeys, options);
+  }
+
+  var leftHandEntries = getIteratorEntries(leftHandOperand);
+  var rightHandEntries = getIteratorEntries(rightHandOperand);
+  if (leftHandEntries.length && leftHandEntries.length === rightHandEntries.length) {
+    leftHandEntries.sort();
+    rightHandEntries.sort();
+    return iterableEqual(leftHandEntries, rightHandEntries, options);
+  }
+
+  if (leftHandKeys.length === 0 &&
+      leftHandEntries.length === 0 &&
+      rightHandKeys.length === 0 &&
+      rightHandEntries.length === 0) {
+    return true;
+  }
+
+  return false;
+}
+
+/*!
+ * Returns true if the argument is a primitive.
+ *
+ * This intentionally returns true for all objects that can be compared by reference,
+ * including functions and symbols.
+ *
+ * @param {Mixed} value
+ * @return {Boolean} result
+ */
+function isPrimitive(value) {
+  return value === null || typeof value !== 'object';
+}
+
+},{"type-detect":38}],36:[function(require,module,exports){
+'use strict';
+
+/* !
+ * Chai - getFuncName utility
+ * Copyright(c) 2012-2016 Jake Luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+
+/**
+ * ### .getFuncName(constructorFn)
+ *
+ * Returns the name of a function.
+ * When a non-function instance is passed, returns `null`.
+ * This also includes a polyfill function if `aFunc.name` is not defined.
+ *
+ * @name getFuncName
+ * @param {Function} funct
+ * @namespace Utils
+ * @api public
+ */
+
+var toString = Function.prototype.toString;
+var functionNameMatch = /\s*function(?:\s|\s*\/\*[^(?:*\/)]+\*\/\s*)*([^\s\(\/]+)/;
+function getFuncName(aFunc) {
+  if (typeof aFunc !== 'function') {
+    return null;
+  }
+
+  var name = '';
+  if (typeof Function.prototype.name === 'undefined' && typeof aFunc.name === 'undefined') {
+    // Here we run a polyfill if Function does not support the `name` property and if aFunc.name is not defined
+    var match = toString.call(aFunc).match(functionNameMatch);
+    if (match) {
+      name = match[1];
+    }
+  } else {
+    // If we've got a `name` property we just use it
+    name = aFunc.name;
+  }
+
+  return name;
+}
+
+module.exports = getFuncName;
+
+},{}],37:[function(require,module,exports){
+'use strict';
+
+/* !
+ * Chai - pathval utility
+ * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
+ * @see https://github.com/logicalparadox/filtr
+ * MIT Licensed
+ */
+
+/**
+ * ### .hasProperty(object, name)
+ *
+ * This allows checking whether an object has own
+ * or inherited from prototype chain named property.
+ *
+ * Basically does the same thing as the `in`
+ * operator but works properly with null/undefined values
+ * and other primitives.
+ *
+ *     var obj = {
+ *         arr: ['a', 'b', 'c']
+ *       , str: 'Hello'
+ *     }
+ *
+ * The following would be the results.
+ *
+ *     hasProperty(obj, 'str');  // true
+ *     hasProperty(obj, 'constructor');  // true
+ *     hasProperty(obj, 'bar');  // false
+ *
+ *     hasProperty(obj.str, 'length'); // true
+ *     hasProperty(obj.str, 1);  // true
+ *     hasProperty(obj.str, 5);  // false
+ *
+ *     hasProperty(obj.arr, 'length');  // true
+ *     hasProperty(obj.arr, 2);  // true
+ *     hasProperty(obj.arr, 3);  // false
+ *
+ * @param {Object} object
+ * @param {String|Symbol} name
+ * @returns {Boolean} whether it exists
+ * @namespace Utils
+ * @name hasProperty
+ * @api public
+ */
+
+function hasProperty(obj, name) {
+  if (typeof obj === 'undefined' || obj === null) {
+    return false;
+  }
+
+  // The `in` operator does not work with primitives.
+  return name in Object(obj);
+}
+
+/* !
+ * ## parsePath(path)
+ *
+ * Helper function used to parse string object
+ * paths. Use in conjunction with `internalGetPathValue`.
+ *
+ *      var parsed = parsePath('myobject.property.subprop');
+ *
+ * ### Paths:
+ *
+ * * Can be infinitely deep and nested.
+ * * Arrays are also valid using the formal `myobject.document[3].property`.
+ * * Literal dots and brackets (not delimiter) must be backslash-escaped.
+ *
+ * @param {String} path
+ * @returns {Object} parsed
+ * @api private
+ */
+
+function parsePath(path) {
+  var str = path.replace(/([^\\])\[/g, '$1.[');
+  var parts = str.match(/(\\\.|[^.]+?)+/g);
+  return parts.map(function mapMatches(value) {
+    var regexp = /^\[(\d+)\]$/;
+    var mArr = regexp.exec(value);
+    var parsed = null;
+    if (mArr) {
+      parsed = { i: parseFloat(mArr[1]) };
+    } else {
+      parsed = { p: value.replace(/\\([.\[\]])/g, '$1') };
+    }
+
+    return parsed;
+  });
+}
+
+/* !
+ * ## internalGetPathValue(obj, parsed[, pathDepth])
+ *
+ * Helper companion function for `.parsePath` that returns
+ * the value located at the parsed address.
+ *
+ *      var value = getPathValue(obj, parsed);
+ *
+ * @param {Object} object to search against
+ * @param {Object} parsed definition from `parsePath`.
+ * @param {Number} depth (nesting level) of the property we want to retrieve
+ * @returns {Object|Undefined} value
+ * @api private
+ */
+
+function internalGetPathValue(obj, parsed, pathDepth) {
+  var temporaryValue = obj;
+  var res = null;
+  pathDepth = (typeof pathDepth === 'undefined' ? parsed.length : pathDepth);
+
+  for (var i = 0; i < pathDepth; i++) {
+    var part = parsed[i];
+    if (temporaryValue) {
+      if (typeof part.p === 'undefined') {
+        temporaryValue = temporaryValue[part.i];
+      } else {
+        temporaryValue = temporaryValue[part.p];
+      }
+
+      if (i === (pathDepth - 1)) {
+        res = temporaryValue;
+      }
+    }
+  }
+
+  return res;
+}
+
+/* !
+ * ## internalSetPathValue(obj, value, parsed)
+ *
+ * Companion function for `parsePath` that sets
+ * the value located at a parsed address.
+ *
+ *  internalSetPathValue(obj, 'value', parsed);
+ *
+ * @param {Object} object to search and define on
+ * @param {*} value to use upon set
+ * @param {Object} parsed definition from `parsePath`
+ * @api private
+ */
+
+function internalSetPathValue(obj, val, parsed) {
+  var tempObj = obj;
+  var pathDepth = parsed.length;
+  var part = null;
+  // Here we iterate through every part of the path
+  for (var i = 0; i < pathDepth; i++) {
+    var propName = null;
+    var propVal = null;
+    part = parsed[i];
+
+    // If it's the last part of the path, we set the 'propName' value with the property name
+    if (i === (pathDepth - 1)) {
+      propName = typeof part.p === 'undefined' ? part.i : part.p;
+      // Now we set the property with the name held by 'propName' on object with the desired val
+      tempObj[propName] = val;
+    } else if (typeof part.p !== 'undefined' && tempObj[part.p]) {
+      tempObj = tempObj[part.p];
+    } else if (typeof part.i !== 'undefined' && tempObj[part.i]) {
+      tempObj = tempObj[part.i];
+    } else {
+      // If the obj doesn't have the property we create one with that name to define it
+      var next = parsed[i + 1];
+      // Here we set the name of the property which will be defined
+      propName = typeof part.p === 'undefined' ? part.i : part.p;
+      // Here we decide if this property will be an array or a new object
+      propVal = typeof next.p === 'undefined' ? [] : {};
+      tempObj[propName] = propVal;
+      tempObj = tempObj[propName];
+    }
+  }
+}
+
+/**
+ * ### .getPathInfo(object, path)
+ *
+ * This allows the retrieval of property info in an
+ * object given a string path.
+ *
+ * The path info consists of an object with the
+ * following properties:
+ *
+ * * parent - The parent object of the property referenced by `path`
+ * * name - The name of the final property, a number if it was an array indexer
+ * * value - The value of the property, if it exists, otherwise `undefined`
+ * * exists - Whether the property exists or not
+ *
+ * @param {Object} object
+ * @param {String} path
+ * @returns {Object} info
+ * @namespace Utils
+ * @name getPathInfo
+ * @api public
+ */
+
+function getPathInfo(obj, path) {
+  var parsed = parsePath(path);
+  var last = parsed[parsed.length - 1];
+  var info = {
+    parent: parsed.length > 1 ? internalGetPathValue(obj, parsed, parsed.length - 1) : obj,
+    name: last.p || last.i,
+    value: internalGetPathValue(obj, parsed),
+  };
+  info.exists = hasProperty(info.parent, info.name);
+
+  return info;
+}
+
+/**
+ * ### .getPathValue(object, path)
+ *
+ * This allows the retrieval of values in an
+ * object given a string path.
+ *
+ *     var obj = {
+ *         prop1: {
+ *             arr: ['a', 'b', 'c']
+ *           , str: 'Hello'
+ *         }
+ *       , prop2: {
+ *             arr: [ { nested: 'Universe' } ]
+ *           , str: 'Hello again!'
+ *         }
+ *     }
+ *
+ * The following would be the results.
+ *
+ *     getPathValue(obj, 'prop1.str'); // Hello
+ *     getPathValue(obj, 'prop1.att[2]'); // b
+ *     getPathValue(obj, 'prop2.arr[0].nested'); // Universe
+ *
+ * @param {Object} object
+ * @param {String} path
+ * @returns {Object} value or `undefined`
+ * @namespace Utils
+ * @name getPathValue
+ * @api public
+ */
+
+function getPathValue(obj, path) {
+  var info = getPathInfo(obj, path);
+  return info.value;
+}
+
+/**
+ * ### .setPathValue(object, path, value)
+ *
+ * Define the value in an object at a given string path.
+ *
+ * ```js
+ * var obj = {
+ *     prop1: {
+ *         arr: ['a', 'b', 'c']
+ *       , str: 'Hello'
+ *     }
+ *   , prop2: {
+ *         arr: [ { nested: 'Universe' } ]
+ *       , str: 'Hello again!'
+ *     }
+ * };
+ * ```
+ *
+ * The following would be acceptable.
+ *
+ * ```js
+ * var properties = require('tea-properties');
+ * properties.set(obj, 'prop1.str', 'Hello Universe!');
+ * properties.set(obj, 'prop1.arr[2]', 'B');
+ * properties.set(obj, 'prop2.arr[0].nested.value', { hello: 'universe' });
+ * ```
+ *
+ * @param {Object} object
+ * @param {String} path
+ * @param {Mixed} value
+ * @api private
+ */
+
+function setPathValue(obj, path, val) {
+  var parsed = parsePath(path);
+  internalSetPathValue(obj, val, parsed);
+  return obj;
+}
+
+module.exports = {
+  hasProperty: hasProperty,
+  getPathInfo: getPathInfo,
+  getPathValue: getPathValue,
+  setPathValue: setPathValue,
+};
+
+},{}],38:[function(require,module,exports){
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+	typeof define === 'function' && define.amd ? define(factory) :
+	(global.typeDetect = factory());
+}(this, (function () { 'use strict';
+
+/* !
+ * type-detect
+ * Copyright(c) 2013 jake luer <jake@alogicalparadox.com>
+ * MIT Licensed
+ */
+var promiseExists = typeof Promise === 'function';
+
+/* eslint-disable no-undef */
+var globalObject = typeof self === 'object' ? self : global; // eslint-disable-line id-blacklist
+
+var symbolExists = typeof Symbol !== 'undefined';
+var mapExists = typeof Map !== 'undefined';
+var setExists = typeof Set !== 'undefined';
+var weakMapExists = typeof WeakMap !== 'undefined';
+var weakSetExists = typeof WeakSet !== 'undefined';
+var dataViewExists = typeof DataView !== 'undefined';
+var symbolIteratorExists = symbolExists && typeof Symbol.iterator !== 'undefined';
+var symbolToStringTagExists = symbolExists && typeof Symbol.toStringTag !== 'undefined';
+var setEntriesExists = setExists && typeof Set.prototype.entries === 'function';
+var mapEntriesExists = mapExists && typeof Map.prototype.entries === 'function';
+var setIteratorPrototype = setEntriesExists && Object.getPrototypeOf(new Set().entries());
+var mapIteratorPrototype = mapEntriesExists && Object.getPrototypeOf(new Map().entries());
+var arrayIteratorExists = symbolIteratorExists && typeof Array.prototype[Symbol.iterator] === 'function';
+var arrayIteratorPrototype = arrayIteratorExists && Object.getPrototypeOf([][Symbol.iterator]());
+var stringIteratorExists = symbolIteratorExists && typeof String.prototype[Symbol.iterator] === 'function';
+var stringIteratorPrototype = stringIteratorExists && Object.getPrototypeOf(''[Symbol.iterator]());
+var toStringLeftSliceLength = 8;
+var toStringRightSliceLength = -1;
+/**
+ * ### typeOf (obj)
+ *
+ * Uses `Object.prototype.toString` to determine the type of an object,
+ * normalising behaviour across engine versions & well optimised.
+ *
+ * @param {Mixed} object
+ * @return {String} object type
+ * @api public
+ */
+function typeDetect(obj) {
+  /* ! Speed optimisation
+   * Pre:
+   *   string literal     x 3,039,035 ops/sec ±1.62% (78 runs sampled)
+   *   boolean literal    x 1,424,138 ops/sec ±4.54% (75 runs sampled)
+   *   number literal     x 1,653,153 ops/sec ±1.91% (82 runs sampled)
+   *   undefined          x 9,978,660 ops/sec ±1.92% (75 runs sampled)
+   *   function           x 2,556,769 ops/sec ±1.73% (77 runs sampled)
+   * Post:
+   *   string literal     x 38,564,796 ops/sec ±1.15% (79 runs sampled)
+   *   boolean literal    x 31,148,940 ops/sec ±1.10% (79 runs sampled)
+   *   number literal     x 32,679,330 ops/sec ±1.90% (78 runs sampled)
+   *   undefined          x 32,363,368 ops/sec ±1.07% (82 runs sampled)
+   *   function           x 31,296,870 ops/sec ±0.96% (83 runs sampled)
+   */
+  var typeofObj = typeof obj;
+  if (typeofObj !== 'object') {
+    return typeofObj;
+  }
+
+  /* ! Speed optimisation
+   * Pre:
+   *   null               x 28,645,765 ops/sec ±1.17% (82 runs sampled)
+   * Post:
+   *   null               x 36,428,962 ops/sec ±1.37% (84 runs sampled)
+   */
+  if (obj === null) {
+    return 'null';
+  }
+
+  /* ! Spec Conformance
+   * Test: `Object.prototype.toString.call(window)``
+   *  - Node === "[object global]"
+   *  - Chrome === "[object global]"
+   *  - Firefox === "[object Window]"
+   *  - PhantomJS === "[object Window]"
+   *  - Safari === "[object Window]"
+   *  - IE 11 === "[object Window]"
+   *  - IE Edge === "[object Window]"
+   * Test: `Object.prototype.toString.call(this)``
+   *  - Chrome Worker === "[object global]"
+   *  - Firefox Worker === "[object DedicatedWorkerGlobalScope]"
+   *  - Safari Worker === "[object DedicatedWorkerGlobalScope]"
+   *  - IE 11 Worker === "[object WorkerGlobalScope]"
+   *  - IE Edge Worker === "[object WorkerGlobalScope]"
+   */
+  if (obj === globalObject) {
+    return 'global';
+  }
+
+  /* ! Speed optimisation
+   * Pre:
+   *   array literal      x 2,888,352 ops/sec ±0.67% (82 runs sampled)
+   * Post:
+   *   array literal      x 22,479,650 ops/sec ±0.96% (81 runs sampled)
+   */
+  if (
+    Array.isArray(obj) &&
+    (symbolToStringTagExists === false || !(Symbol.toStringTag in obj))
+  ) {
+    return 'Array';
+  }
+
+  // Not caching existence of `window` and related properties due to potential
+  // for `window` to be unset before tests in quasi-browser environments.
+  if (typeof window === 'object' && window !== null) {
+    /* ! Spec Conformance
+     * (https://html.spec.whatwg.org/multipage/browsers.html#location)
+     * WhatWG HTML$7.7.3 - The `Location` interface
+     * Test: `Object.prototype.toString.call(window.location)``
+     *  - IE <=11 === "[object Object]"
+     *  - IE Edge <=13 === "[object Object]"
+     */
+    if (typeof window.location === 'object' && obj === window.location) {
+      return 'Location';
+    }
+
+    /* ! Spec Conformance
+     * (https://html.spec.whatwg.org/#document)
+     * WhatWG HTML$3.1.1 - The `Document` object
+     * Note: Most browsers currently adher to the W3C DOM Level 2 spec
+     *       (https://www.w3.org/TR/DOM-Level-2-HTML/html.html#ID-26809268)
+     *       which suggests that browsers should use HTMLTableCellElement for
+     *       both TD and TH elements. WhatWG separates these.
+     *       WhatWG HTML states:
+     *         > For historical reasons, Window objects must also have a
+     *         > writable, configurable, non-enumerable property named
+     *         > HTMLDocument whose value is the Document interface object.
+     * Test: `Object.prototype.toString.call(document)``
+     *  - Chrome === "[object HTMLDocument]"
+     *  - Firefox === "[object HTMLDocument]"
+     *  - Safari === "[object HTMLDocument]"
+     *  - IE <=10 === "[object Document]"
+     *  - IE 11 === "[object HTMLDocument]"
+     *  - IE Edge <=13 === "[object HTMLDocument]"
+     */
+    if (typeof window.document === 'object' && obj === window.document) {
+      return 'Document';
+    }
+
+    if (typeof window.navigator === 'object') {
+      /* ! Spec Conformance
+       * (https://html.spec.whatwg.org/multipage/webappapis.html#mimetypearray)
+       * WhatWG HTML$8.6.1.5 - Plugins - Interface MimeTypeArray
+       * Test: `Object.prototype.toString.call(navigator.mimeTypes)``
+       *  - IE <=10 === "[object MSMimeTypesCollection]"
+       */
+      if (typeof window.navigator.mimeTypes === 'object' &&
+          obj === window.navigator.mimeTypes) {
+        return 'MimeTypeArray';
+      }
+
+      /* ! Spec Conformance
+       * (https://html.spec.whatwg.org/multipage/webappapis.html#pluginarray)
+       * WhatWG HTML$8.6.1.5 - Plugins - Interface PluginArray
+       * Test: `Object.prototype.toString.call(navigator.plugins)``
+       *  - IE <=10 === "[object MSPluginsCollection]"
+       */
+      if (typeof window.navigator.plugins === 'object' &&
+          obj === window.navigator.plugins) {
+        return 'PluginArray';
+      }
+    }
+
+    if ((typeof window.HTMLElement === 'function' ||
+        typeof window.HTMLElement === 'object') &&
+        obj instanceof window.HTMLElement) {
+      /* ! Spec Conformance
+      * (https://html.spec.whatwg.org/multipage/webappapis.html#pluginarray)
+      * WhatWG HTML$4.4.4 - The `blockquote` element - Interface `HTMLQuoteElement`
+      * Test: `Object.prototype.toString.call(document.createElement('blockquote'))``
+      *  - IE <=10 === "[object HTMLBlockElement]"
+      */
+      if (obj.tagName === 'BLOCKQUOTE') {
+        return 'HTMLQuoteElement';
+      }
+
+      /* ! Spec Conformance
+       * (https://html.spec.whatwg.org/#htmltabledatacellelement)
+       * WhatWG HTML$4.9.9 - The `td` element - Interface `HTMLTableDataCellElement`
+       * Note: Most browsers currently adher to the W3C DOM Level 2 spec
+       *       (https://www.w3.org/TR/DOM-Level-2-HTML/html.html#ID-82915075)
+       *       which suggests that browsers should use HTMLTableCellElement for
+       *       both TD and TH elements. WhatWG separates these.
+       * Test: Object.prototype.toString.call(document.createElement('td'))
+       *  - Chrome === "[object HTMLTableCellElement]"
+       *  - Firefox === "[object HTMLTableCellElement]"
+       *  - Safari === "[object HTMLTableCellElement]"
+       */
+      if (obj.tagName === 'TD') {
+        return 'HTMLTableDataCellElement';
+      }
+
+      /* ! Spec Conformance
+       * (https://html.spec.whatwg.org/#htmltableheadercellelement)
+       * WhatWG HTML$4.9.9 - The `td` element - Interface `HTMLTableHeaderCellElement`
+       * Note: Most browsers currently adher to the W3C DOM Level 2 spec
+       *       (https://www.w3.org/TR/DOM-Level-2-HTML/html.html#ID-82915075)
+       *       which suggests that browsers should use HTMLTableCellElement for
+       *       both TD and TH elements. WhatWG separates these.
+       * Test: Object.prototype.toString.call(document.createElement('th'))
+       *  - Chrome === "[object HTMLTableCellElement]"
+       *  - Firefox === "[object HTMLTableCellElement]"
+       *  - Safari === "[object HTMLTableCellElement]"
+       */
+      if (obj.tagName === 'TH') {
+        return 'HTMLTableHeaderCellElement';
+      }
+    }
+  }
+
+  /* ! Speed optimisation
+  * Pre:
+  *   Float64Array       x 625,644 ops/sec ±1.58% (80 runs sampled)
+  *   Float32Array       x 1,279,852 ops/sec ±2.91% (77 runs sampled)
+  *   Uint32Array        x 1,178,185 ops/sec ±1.95% (83 runs sampled)
+  *   Uint16Array        x 1,008,380 ops/sec ±2.25% (80 runs sampled)
+  *   Uint8Array         x 1,128,040 ops/sec ±2.11% (81 runs sampled)
+  *   Int32Array         x 1,170,119 ops/sec ±2.88% (80 runs sampled)
+  *   Int16Array         x 1,176,348 ops/sec ±5.79% (86 runs sampled)
+  *   Int8Array          x 1,058,707 ops/sec ±4.94% (77 runs sampled)
+  *   Uint8ClampedArray  x 1,110,633 ops/sec ±4.20% (80 runs sampled)
+  * Post:
+  *   Float64Array       x 7,105,671 ops/sec ±13.47% (64 runs sampled)
+  *   Float32Array       x 5,887,912 ops/sec ±1.46% (82 runs sampled)
+  *   Uint32Array        x 6,491,661 ops/sec ±1.76% (79 runs sampled)
+  *   Uint16Array        x 6,559,795 ops/sec ±1.67% (82 runs sampled)
+  *   Uint8Array         x 6,463,966 ops/sec ±1.43% (85 runs sampled)
+  *   Int32Array         x 5,641,841 ops/sec ±3.49% (81 runs sampled)
+  *   Int16Array         x 6,583,511 ops/sec ±1.98% (80 runs sampled)
+  *   Int8Array          x 6,606,078 ops/sec ±1.74% (81 runs sampled)
+  *   Uint8ClampedArray  x 6,602,224 ops/sec ±1.77% (83 runs sampled)
+  */
+  var stringTag = (symbolToStringTagExists && obj[Symbol.toStringTag]);
+  if (typeof stringTag === 'string') {
+    return stringTag;
+  }
+
+  var objPrototype = Object.getPrototypeOf(obj);
+  /* ! Speed optimisation
+  * Pre:
+  *   regex literal      x 1,772,385 ops/sec ±1.85% (77 runs sampled)
+  *   regex constructor  x 2,143,634 ops/sec ±2.46% (78 runs sampled)
+  * Post:
+  *   regex literal      x 3,928,009 ops/sec ±0.65% (78 runs sampled)
+  *   regex constructor  x 3,931,108 ops/sec ±0.58% (84 runs sampled)
+  */
+  if (objPrototype === RegExp.prototype) {
+    return 'RegExp';
+  }
+
+  /* ! Speed optimisation
+  * Pre:
+  *   date               x 2,130,074 ops/sec ±4.42% (68 runs sampled)
+  * Post:
+  *   date               x 3,953,779 ops/sec ±1.35% (77 runs sampled)
+  */
+  if (objPrototype === Date.prototype) {
+    return 'Date';
+  }
+
+  /* ! Spec Conformance
+   * (http://www.ecma-international.org/ecma-262/6.0/index.html#sec-promise.prototype-@@tostringtag)
+   * ES6$25.4.5.4 - Promise.prototype[@@toStringTag] should be "Promise":
+   * Test: `Object.prototype.toString.call(Promise.resolve())``
+   *  - Chrome <=47 === "[object Object]"
+   *  - Edge <=20 === "[object Object]"
+   *  - Firefox 29-Latest === "[object Promise]"
+   *  - Safari 7.1-Latest === "[object Promise]"
+   */
+  if (promiseExists && objPrototype === Promise.prototype) {
+    return 'Promise';
+  }
+
+  /* ! Speed optimisation
+  * Pre:
+  *   set                x 2,222,186 ops/sec ±1.31% (82 runs sampled)
+  * Post:
+  *   set                x 4,545,879 ops/sec ±1.13% (83 runs sampled)
+  */
+  if (setExists && objPrototype === Set.prototype) {
+    return 'Set';
+  }
+
+  /* ! Speed optimisation
+  * Pre:
+  *   map                x 2,396,842 ops/sec ±1.59% (81 runs sampled)
+  * Post:
+  *   map                x 4,183,945 ops/sec ±6.59% (82 runs sampled)
+  */
+  if (mapExists && objPrototype === Map.prototype) {
+    return 'Map';
+  }
+
+  /* ! Speed optimisation
+  * Pre:
+  *   weakset            x 1,323,220 ops/sec ±2.17% (76 runs sampled)
+  * Post:
+  *   weakset            x 4,237,510 ops/sec ±2.01% (77 runs sampled)
+  */
+  if (weakSetExists && objPrototype === WeakSet.prototype) {
+    return 'WeakSet';
+  }
+
+  /* ! Speed optimisation
+  * Pre:
+  *   weakmap            x 1,500,260 ops/sec ±2.02% (78 runs sampled)
+  * Post:
+  *   weakmap            x 3,881,384 ops/sec ±1.45% (82 runs sampled)
+  */
+  if (weakMapExists && objPrototype === WeakMap.prototype) {
+    return 'WeakMap';
+  }
+
+  /* ! Spec Conformance
+   * (http://www.ecma-international.org/ecma-262/6.0/index.html#sec-dataview.prototype-@@tostringtag)
+   * ES6$24.2.4.21 - DataView.prototype[@@toStringTag] should be "DataView":
+   * Test: `Object.prototype.toString.call(new DataView(new ArrayBuffer(1)))``
+   *  - Edge <=13 === "[object Object]"
+   */
+  if (dataViewExists && objPrototype === DataView.prototype) {
+    return 'DataView';
+  }
+
+  /* ! Spec Conformance
+   * (http://www.ecma-international.org/ecma-262/6.0/index.html#sec-%mapiteratorprototype%-@@tostringtag)
+   * ES6$23.1.5.2.2 - %MapIteratorPrototype%[@@toStringTag] should be "Map Iterator":
+   * Test: `Object.prototype.toString.call(new Map().entries())``
+   *  - Edge <=13 === "[object Object]"
+   */
+  if (mapExists && objPrototype === mapIteratorPrototype) {
+    return 'Map Iterator';
+  }
+
+  /* ! Spec Conformance
+   * (http://www.ecma-international.org/ecma-262/6.0/index.html#sec-%setiteratorprototype%-@@tostringtag)
+   * ES6$23.2.5.2.2 - %SetIteratorPrototype%[@@toStringTag] should be "Set Iterator":
+   * Test: `Object.prototype.toString.call(new Set().entries())``
+   *  - Edge <=13 === "[object Object]"
+   */
+  if (setExists && objPrototype === setIteratorPrototype) {
+    return 'Set Iterator';
+  }
+
+  /* ! Spec Conformance
+   * (http://www.ecma-international.org/ecma-262/6.0/index.html#sec-%arrayiteratorprototype%-@@tostringtag)
+   * ES6$22.1.5.2.2 - %ArrayIteratorPrototype%[@@toStringTag] should be "Array Iterator":
+   * Test: `Object.prototype.toString.call([][Symbol.iterator]())``
+   *  - Edge <=13 === "[object Object]"
+   */
+  if (arrayIteratorExists && objPrototype === arrayIteratorPrototype) {
+    return 'Array Iterator';
+  }
+
+  /* ! Spec Conformance
+   * (http://www.ecma-international.org/ecma-262/6.0/index.html#sec-%stringiteratorprototype%-@@tostringtag)
+   * ES6$21.1.5.2.2 - %StringIteratorPrototype%[@@toStringTag] should be "String Iterator":
+   * Test: `Object.prototype.toString.call(''[Symbol.iterator]())``
+   *  - Edge <=13 === "[object Object]"
+   */
+  if (stringIteratorExists && objPrototype === stringIteratorPrototype) {
+    return 'String Iterator';
+  }
+
+  /* ! Speed optimisation
+  * Pre:
+  *   object from null   x 2,424,320 ops/sec ±1.67% (76 runs sampled)
+  * Post:
+  *   object from null   x 5,838,000 ops/sec ±0.99% (84 runs sampled)
+  */
+  if (objPrototype === null) {
+    return 'Object';
+  }
+
+  return Object
+    .prototype
+    .toString
+    .call(obj)
+    .slice(toStringLeftSliceLength, toStringRightSliceLength);
+}
+
+return typeDetect;
+
+})));
+
+},{}]},{},[1])(1)
+});
diff --git a/src/manifest.json b/src/manifest.json
index c08de32..0672bd1 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -4,9 +4,15 @@
   "version": "3000.0.0",
   "manifest_version": 2,
   "background": {
-    "scripts": ["background.js"]
+    "scripts": [
+      "browser.js",
+      "background.js"
+    ]
   },
   "browser_action": {
     "default_popup": "popup.html"
-  }
+  },
+  "web_accessible_resources": [
+    "test.html"
+  ]
 }
diff --git a/src/mocha.css b/src/mocha.css
new file mode 100644
index 0000000..ec96b00
--- /dev/null
+++ b/src/mocha.css
@@ -0,0 +1,326 @@
+@charset "utf-8";
+
+body {
+  margin:0;
+}
+
+#mocha {
+  font: 20px/1.5 "Helvetica Neue", Helvetica, Arial, sans-serif;
+  margin: 60px 50px;
+}
+
+#mocha ul,
+#mocha li {
+  margin: 0;
+  padding: 0;
+}
+
+#mocha ul {
+  list-style: none;
+}
+
+#mocha h1,
+#mocha h2 {
+  margin: 0;
+}
+
+#mocha h1 {
+  margin-top: 15px;
+  font-size: 1em;
+  font-weight: 200;
+}
+
+#mocha h1 a {
+  text-decoration: none;
+  color: inherit;
+}
+
+#mocha h1 a:hover {
+  text-decoration: underline;
+}
+
+#mocha .suite .suite h1 {
+  margin-top: 0;
+  font-size: .8em;
+}
+
+#mocha .hidden {
+  display: none;
+}
+
+#mocha h2 {
+  font-size: 12px;
+  font-weight: normal;
+  cursor: pointer;
+}
+
+#mocha .suite {
+  margin-left: 15px;
+}
+
+#mocha .test {
+  margin-left: 15px;
+  overflow: hidden;
+}
+
+#mocha .test.pending:hover h2::after {
+  content: '(pending)';
+  font-family: arial, sans-serif;
+}
+
+#mocha .test.pass.medium .duration {
+  background: #c09853;
+}
+
+#mocha .test.pass.slow .duration {
+  background: #b94a48;
+}
+
+#mocha .test.pass::before {
+  content: '✓';
+  font-size: 12px;
+  display: block;
+  float: left;
+  margin-right: 5px;
+  color: #00d6b2;
+}
+
+#mocha .test.pass .duration {
+  font-size: 9px;
+  margin-left: 5px;
+  padding: 2px 5px;
+  color: #fff;
+  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  -moz-box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  -webkit-border-radius: 5px;
+  -moz-border-radius: 5px;
+  -ms-border-radius: 5px;
+  -o-border-radius: 5px;
+  border-radius: 5px;
+}
+
+#mocha .test.pass.fast .duration {
+  display: none;
+}
+
+#mocha .test.pending {
+  color: #0b97c4;
+}
+
+#mocha .test.pending::before {
+  content: '◦';
+  color: #0b97c4;
+}
+
+#mocha .test.fail {
+  color: #c00;
+}
+
+#mocha .test.fail pre {
+  color: black;
+}
+
+#mocha .test.fail::before {
+  content: '✖';
+  font-size: 12px;
+  display: block;
+  float: left;
+  margin-right: 5px;
+  color: #c00;
+}
+
+#mocha .test pre.error {
+  color: #c00;
+  max-height: 300px;
+  overflow: auto;
+}
+
+#mocha .test .html-error {
+  overflow: auto;
+  color: black;
+  line-height: 1.5;
+  display: block;
+  float: left;
+  clear: left;
+  font: 12px/1.5 monaco, monospace;
+  margin: 5px;
+  padding: 15px;
+  border: 1px solid #eee;
+  max-width: 85%; /*(1)*/
+  max-width: -webkit-calc(100% - 42px);
+  max-width: -moz-calc(100% - 42px);
+  max-width: calc(100% - 42px); /*(2)*/
+  max-height: 300px;
+  word-wrap: break-word;
+  border-bottom-color: #ddd;
+  -webkit-box-shadow: 0 1px 3px #eee;
+  -moz-box-shadow: 0 1px 3px #eee;
+  box-shadow: 0 1px 3px #eee;
+  -webkit-border-radius: 3px;
+  -moz-border-radius: 3px;
+  border-radius: 3px;
+}
+
+#mocha .test .html-error pre.error {
+  border: none;
+  -webkit-border-radius: 0;
+  -moz-border-radius: 0;
+  border-radius: 0;
+  -webkit-box-shadow: 0;
+  -moz-box-shadow: 0;
+  box-shadow: 0;
+  padding: 0;
+  margin: 0;
+  margin-top: 18px;
+  max-height: none;
+}
+
+/**
+ * (1): approximate for browsers not supporting calc
+ * (2): 42 = 2*15 + 2*10 + 2*1 (padding + margin + border)
+ *      ^^ seriously
+ */
+#mocha .test pre {
+  display: block;
+  float: left;
+  clear: left;
+  font: 12px/1.5 monaco, monospace;
+  margin: 5px;
+  padding: 15px;
+  border: 1px solid #eee;
+  max-width: 85%; /*(1)*/
+  max-width: -webkit-calc(100% - 42px);
+  max-width: -moz-calc(100% - 42px);
+  max-width: calc(100% - 42px); /*(2)*/
+  word-wrap: break-word;
+  border-bottom-color: #ddd;
+  -webkit-box-shadow: 0 1px 3px #eee;
+  -moz-box-shadow: 0 1px 3px #eee;
+  box-shadow: 0 1px 3px #eee;
+  -webkit-border-radius: 3px;
+  -moz-border-radius: 3px;
+  border-radius: 3px;
+}
+
+#mocha .test h2 {
+  position: relative;
+}
+
+#mocha .test a.replay {
+  position: absolute;
+  top: 3px;
+  right: 0;
+  text-decoration: none;
+  vertical-align: middle;
+  display: block;
+  width: 15px;
+  height: 15px;
+  line-height: 15px;
+  text-align: center;
+  background: #eee;
+  font-size: 15px;
+  -webkit-border-radius: 15px;
+  -moz-border-radius: 15px;
+  border-radius: 15px;
+  -webkit-transition:opacity 200ms;
+  -moz-transition:opacity 200ms;
+  -o-transition:opacity 200ms;
+  transition: opacity 200ms;
+  opacity: 0.3;
+  color: #888;
+}
+
+#mocha .test:hover a.replay {
+  opacity: 1;
+}
+
+#mocha-report.pass .test.fail {
+  display: none;
+}
+
+#mocha-report.fail .test.pass {
+  display: none;
+}
+
+#mocha-report.pending .test.pass,
+#mocha-report.pending .test.fail {
+  display: none;
+}
+#mocha-report.pending .test.pass.pending {
+  display: block;
+}
+
+#mocha-error {
+  color: #c00;
+  font-size: 1.5em;
+  font-weight: 100;
+  letter-spacing: 1px;
+}
+
+#mocha-stats {
+  position: fixed;
+  top: 15px;
+  right: 10px;
+  font-size: 12px;
+  margin: 0;
+  color: #888;
+  z-index: 1;
+}
+
+#mocha-stats .progress {
+  float: right;
+  padding-top: 0;
+
+  /**
+   * Set safe initial values, so mochas .progress does not inherit these
+   * properties from Bootstrap .progress (which causes .progress height to
+   * equal line height set in Bootstrap).
+   */
+  height: auto;
+  -webkit-box-shadow: none;
+  -moz-box-shadow: none;
+  box-shadow: none;
+  background-color: initial;
+}
+
+#mocha-stats em {
+  color: black;
+}
+
+#mocha-stats a {
+  text-decoration: none;
+  color: inherit;
+}
+
+#mocha-stats a:hover {
+  border-bottom: 1px solid #eee;
+}
+
+#mocha-stats li {
+  display: inline-block;
+  margin: 0 5px;
+  list-style: none;
+  padding-top: 11px;
+}
+
+#mocha-stats canvas {
+  width: 40px;
+  height: 40px;
+}
+
+#mocha code .comment { color: #ddd; }
+#mocha code .init { color: #2f6fad; }
+#mocha code .string { color: #5890ad; }
+#mocha code .keyword { color: #8a6343; }
+#mocha code .number { color: #2f6fad; }
+
+@media screen and (max-device-width: 480px) {
+  #mocha {
+    margin: 60px 0px;
+  }
+
+  #mocha #stats {
+    position: absolute;
+  }
+}
diff --git a/src/mocha.js b/src/mocha.js
new file mode 100644
index 0000000..342bf46
--- /dev/null
+++ b/src/mocha.js
@@ -0,0 +1,17910 @@
+(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
+(function (process,global){
+'use strict';
+
+/* eslint no-unused-vars: off */
+/* eslint-env commonjs */
+
+/**
+ * Shim process.stdout.
+ */
+
+process.stdout = require('browser-stdout')({label: false});
+
+var Mocha = require('./lib/mocha');
+
+/**
+ * Create a Mocha instance.
+ *
+ * @return {undefined}
+ */
+
+var mocha = new Mocha({reporter: 'html'});
+
+/**
+ * Save timer references to avoid Sinon interfering (see GH-237).
+ */
+
+var Date = global.Date;
+var setTimeout = global.setTimeout;
+var setInterval = global.setInterval;
+var clearTimeout = global.clearTimeout;
+var clearInterval = global.clearInterval;
+
+var uncaughtExceptionHandlers = [];
+
+var originalOnerrorHandler = global.onerror;
+
+/**
+ * Remove uncaughtException listener.
+ * Revert to original onerror handler if previously defined.
+ */
+
+process.removeListener = function(e, fn) {
+  if (e === 'uncaughtException') {
+    if (originalOnerrorHandler) {
+      global.onerror = originalOnerrorHandler;
+    } else {
+      global.onerror = function() {};
+    }
+    var i = uncaughtExceptionHandlers.indexOf(fn);
+    if (i !== -1) {
+      uncaughtExceptionHandlers.splice(i, 1);
+    }
+  }
+};
+
+/**
+ * Implements uncaughtException listener.
+ */
+
+process.on = function(e, fn) {
+  if (e === 'uncaughtException') {
+    global.onerror = function(err, url, line) {
+      fn(new Error(err + ' (' + url + ':' + line + ')'));
+      return !mocha.allowUncaught;
+    };
+    uncaughtExceptionHandlers.push(fn);
+  }
+};
+
+// The BDD UI is registered by default, but no UI will be functional in the
+// browser without an explicit call to the overridden `mocha.ui` (see below).
+// Ensure that this default UI does not expose its methods to the global scope.
+mocha.suite.removeAllListeners('pre-require');
+
+var immediateQueue = [];
+var immediateTimeout;
+
+function timeslice() {
+  var immediateStart = new Date().getTime();
+  while (immediateQueue.length && new Date().getTime() - immediateStart < 100) {
+    immediateQueue.shift()();
+  }
+  if (immediateQueue.length) {
+    immediateTimeout = setTimeout(timeslice, 0);
+  } else {
+    immediateTimeout = null;
+  }
+}
+
+/**
+ * High-performance override of Runner.immediately.
+ */
+
+Mocha.Runner.immediately = function(callback) {
+  immediateQueue.push(callback);
+  if (!immediateTimeout) {
+    immediateTimeout = setTimeout(timeslice, 0);
+  }
+};
+
+/**
+ * Function to allow assertion libraries to throw errors directly into mocha.
+ * This is useful when running tests in a browser because window.onerror will
+ * only receive the 'message' attribute of the Error.
+ */
+mocha.throwError = function(err) {
+  uncaughtExceptionHandlers.forEach(function(fn) {
+    fn(err);
+  });
+  throw err;
+};
+
+/**
+ * Override ui to ensure that the ui functions are initialized.
+ * Normally this would happen in Mocha.prototype.loadFiles.
+ */
+
+mocha.ui = function(ui) {
+  Mocha.prototype.ui.call(this, ui);
+  this.suite.emit('pre-require', global, null, this);
+  return this;
+};
+
+/**
+ * Setup mocha with the given setting options.
+ */
+
+mocha.setup = function(opts) {
+  if (typeof opts === 'string') {
+    opts = {ui: opts};
+  }
+  for (var opt in opts) {
+    if (opts.hasOwnProperty(opt)) {
+      this[opt](opts[opt]);
+    }
+  }
+  return this;
+};
+
+/**
+ * Run mocha, returning the Runner.
+ */
+
+mocha.run = function(fn) {
+  var options = mocha.options;
+  mocha.globals('location');
+
+  var query = Mocha.utils.parseQuery(global.location.search || '');
+  if (query.grep) {
+    mocha.grep(query.grep);
+  }
+  if (query.fgrep) {
+    mocha.fgrep(query.fgrep);
+  }
+  if (query.invert) {
+    mocha.invert();
+  }
+
+  return Mocha.prototype.run.call(mocha, function(err) {
+    // The DOM Document is not available in Web Workers.
+    var document = global.document;
+    if (
+      document &&
+      document.getElementById('mocha') &&
+      options.noHighlighting !== true
+    ) {
+      Mocha.utils.highlightTags('code');
+    }
+    if (fn) {
+      fn(err);
+    }
+  });
+};
+
+/**
+ * Expose the process shim.
+ * https://github.com/mochajs/mocha/pull/916
+ */
+
+Mocha.process = process;
+
+/**
+ * Expose mocha.
+ */
+
+global.Mocha = Mocha;
+global.mocha = mocha;
+
+// this allows test/acceptance/required-tokens.js to pass; thus,
+// you can now do `const describe = require('mocha').describe` in a
+// browser context (assuming browserification).  should fix #880
+module.exports = global;
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./lib/mocha":14,"_process":68,"browser-stdout":41}],2:[function(require,module,exports){
+(function (process,global){
+'use strict';
+
+/**
+ * Web Notifications module.
+ * @module Growl
+ */
+
+/**
+ * Save timer references to avoid Sinon interfering (see GH-237).
+ */
+var Date = global.Date;
+var setTimeout = global.setTimeout;
+var EVENT_RUN_END = require('../runner').constants.EVENT_RUN_END;
+
+/**
+ * Checks if browser notification support exists.
+ *
+ * @public
+ * @see {@link https://caniuse.com/#feat=notifications|Browser support (notifications)}
+ * @see {@link https://caniuse.com/#feat=promises|Browser support (promises)}
+ * @see {@link Mocha#growl}
+ * @see {@link Mocha#isGrowlCapable}
+ * @return {boolean} whether browser notification support exists
+ */
+exports.isCapable = function() {
+  var hasNotificationSupport = 'Notification' in window;
+  var hasPromiseSupport = typeof Promise === 'function';
+  return process.browser && hasNotificationSupport && hasPromiseSupport;
+};
+
+/**
+ * Implements browser notifications as a pseudo-reporter.
+ *
+ * @public
+ * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/notification|Notification API}
+ * @see {@link https://developers.google.com/web/fundamentals/push-notifications/display-a-notification|Displaying a Notification}
+ * @see {@link Growl#isPermitted}
+ * @see {@link Mocha#_growl}
+ * @param {Runner} runner - Runner instance.
+ */
+exports.notify = function(runner) {
+  var promise = isPermitted();
+
+  /**
+   * Attempt notification.
+   */
+  var sendNotification = function() {
+    // If user hasn't responded yet... "No notification for you!" (Seinfeld)
+    Promise.race([promise, Promise.resolve(undefined)])
+      .then(canNotify)
+      .then(function() {
+        display(runner);
+      })
+      .catch(notPermitted);
+  };
+
+  runner.once(EVENT_RUN_END, sendNotification);
+};
+
+/**
+ * Checks if browser notification is permitted by user.
+ *
+ * @private
+ * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/Notification/permission|Notification.permission}
+ * @see {@link Mocha#growl}
+ * @see {@link Mocha#isGrowlPermitted}
+ * @returns {Promise<boolean>} promise determining if browser notification
+ *     permissible when fulfilled.
+ */
+function isPermitted() {
+  var permitted = {
+    granted: function allow() {
+      return Promise.resolve(true);
+    },
+    denied: function deny() {
+      return Promise.resolve(false);
+    },
+    default: function ask() {
+      return Notification.requestPermission().then(function(permission) {
+        return permission === 'granted';
+      });
+    }
+  };
+
+  return permitted[Notification.permission]();
+}
+
+/**
+ * @summary
+ * Determines if notification should proceed.
+ *
+ * @description
+ * Notification shall <strong>not</strong> proceed unless `value` is true.
+ *
+ * `value` will equal one of:
+ * <ul>
+ *   <li><code>true</code> (from `isPermitted`)</li>
+ *   <li><code>false</code> (from `isPermitted`)</li>
+ *   <li><code>undefined</code> (from `Promise.race`)</li>
+ * </ul>
+ *
+ * @private
+ * @param {boolean|undefined} value - Determines if notification permissible.
+ * @returns {Promise<undefined>} Notification can proceed
+ */
+function canNotify(value) {
+  if (!value) {
+    var why = value === false ? 'blocked' : 'unacknowledged';
+    var reason = 'not permitted by user (' + why + ')';
+    return Promise.reject(new Error(reason));
+  }
+  return Promise.resolve();
+}
+
+/**
+ * Displays the notification.
+ *
+ * @private
+ * @param {Runner} runner - Runner instance.
+ */
+function display(runner) {
+  var stats = runner.stats;
+  var symbol = {
+    cross: '\u274C',
+    tick: '\u2705'
+  };
+  var logo = require('../../package').notifyLogo;
+  var _message;
+  var message;
+  var title;
+
+  if (stats.failures) {
+    _message = stats.failures + ' of ' + stats.tests + ' tests failed';
+    message = symbol.cross + ' ' + _message;
+    title = 'Failed';
+  } else {
+    _message = stats.passes + ' tests passed in ' + stats.duration + 'ms';
+    message = symbol.tick + ' ' + _message;
+    title = 'Passed';
+  }
+
+  // Send notification
+  var options = {
+    badge: logo,
+    body: message,
+    dir: 'ltr',
+    icon: logo,
+    lang: 'en-US',
+    name: 'mocha',
+    requireInteraction: false,
+    timestamp: Date.now()
+  };
+  var notification = new Notification(title, options);
+
+  // Autoclose after brief delay (makes various browsers act same)
+  var FORCE_DURATION = 4000;
+  setTimeout(notification.close.bind(notification), FORCE_DURATION);
+}
+
+/**
+ * As notifications are tangential to our purpose, just log the error.
+ *
+ * @private
+ * @param {Error} err - Why notification didn't happen.
+ */
+function notPermitted(err) {
+  console.error('notification error:', err.message);
+}
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"../../package":89,"../runner":34,"_process":68}],3:[function(require,module,exports){
+'use strict';
+
+/**
+ * Expose `Progress`.
+ */
+
+module.exports = Progress;
+
+/**
+ * Initialize a new `Progress` indicator.
+ */
+function Progress() {
+  this.percent = 0;
+  this.size(0);
+  this.fontSize(11);
+  this.font('helvetica, arial, sans-serif');
+}
+
+/**
+ * Set progress size to `size`.
+ *
+ * @public
+ * @param {number} size
+ * @return {Progress} Progress instance.
+ */
+Progress.prototype.size = function(size) {
+  this._size = size;
+  return this;
+};
+
+/**
+ * Set text to `text`.
+ *
+ * @public
+ * @param {string} text
+ * @return {Progress} Progress instance.
+ */
+Progress.prototype.text = function(text) {
+  this._text = text;
+  return this;
+};
+
+/**
+ * Set font size to `size`.
+ *
+ * @public
+ * @param {number} size
+ * @return {Progress} Progress instance.
+ */
+Progress.prototype.fontSize = function(size) {
+  this._fontSize = size;
+  return this;
+};
+
+/**
+ * Set font to `family`.
+ *
+ * @param {string} family
+ * @return {Progress} Progress instance.
+ */
+Progress.prototype.font = function(family) {
+  this._font = family;
+  return this;
+};
+
+/**
+ * Update percentage to `n`.
+ *
+ * @param {number} n
+ * @return {Progress} Progress instance.
+ */
+Progress.prototype.update = function(n) {
+  this.percent = n;
+  return this;
+};
+
+/**
+ * Draw on `ctx`.
+ *
+ * @param {CanvasRenderingContext2d} ctx
+ * @return {Progress} Progress instance.
+ */
+Progress.prototype.draw = function(ctx) {
+  try {
+    var percent = Math.min(this.percent, 100);
+    var size = this._size;
+    var half = size / 2;
+    var x = half;
+    var y = half;
+    var rad = half - 1;
+    var fontSize = this._fontSize;
+
+    ctx.font = fontSize + 'px ' + this._font;
+
+    var angle = Math.PI * 2 * (percent / 100);
+    ctx.clearRect(0, 0, size, size);
+
+    // outer circle
+    ctx.strokeStyle = '#9f9f9f';
+    ctx.beginPath();
+    ctx.arc(x, y, rad, 0, angle, false);
+    ctx.stroke();
+
+    // inner circle
+    ctx.strokeStyle = '#eee';
+    ctx.beginPath();
+    ctx.arc(x, y, rad - 1, 0, angle, true);
+    ctx.stroke();
+
+    // text
+    var text = this._text || (percent | 0) + '%';
+    var w = ctx.measureText(text).width;
+
+    ctx.fillText(text, x - w / 2 + 1, y + fontSize / 2 - 1);
+  } catch (ignore) {
+    // don't fail if we can't render progress
+  }
+  return this;
+};
+
+},{}],4:[function(require,module,exports){
+(function (global){
+'use strict';
+
+exports.isatty = function isatty() {
+  return true;
+};
+
+exports.getWindowSize = function getWindowSize() {
+  if ('innerHeight' in global) {
+    return [global.innerHeight, global.innerWidth];
+  }
+  // In a Web Worker, the DOM Window is not available.
+  return [640, 480];
+};
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{}],5:[function(require,module,exports){
+'use strict';
+/**
+ * @module Context
+ */
+/**
+ * Expose `Context`.
+ */
+
+module.exports = Context;
+
+/**
+ * Initialize a new `Context`.
+ *
+ * @private
+ */
+function Context() {}
+
+/**
+ * Set or get the context `Runnable` to `runnable`.
+ *
+ * @private
+ * @param {Runnable} runnable
+ * @return {Context} context
+ */
+Context.prototype.runnable = function(runnable) {
+  if (!arguments.length) {
+    return this._runnable;
+  }
+  this.test = this._runnable = runnable;
+  return this;
+};
+
+/**
+ * Set or get test timeout `ms`.
+ *
+ * @private
+ * @param {number} ms
+ * @return {Context} self
+ */
+Context.prototype.timeout = function(ms) {
+  if (!arguments.length) {
+    return this.runnable().timeout();
+  }
+  this.runnable().timeout(ms);
+  return this;
+};
+
+/**
+ * Set test timeout `enabled`.
+ *
+ * @private
+ * @param {boolean} enabled
+ * @return {Context} self
+ */
+Context.prototype.enableTimeouts = function(enabled) {
+  if (!arguments.length) {
+    return this.runnable().enableTimeouts();
+  }
+  this.runnable().enableTimeouts(enabled);
+  return this;
+};
+
+/**
+ * Set or get test slowness threshold `ms`.
+ *
+ * @private
+ * @param {number} ms
+ * @return {Context} self
+ */
+Context.prototype.slow = function(ms) {
+  if (!arguments.length) {
+    return this.runnable().slow();
+  }
+  this.runnable().slow(ms);
+  return this;
+};
+
+/**
+ * Mark a test as skipped.
+ *
+ * @private
+ * @throws Pending
+ */
+Context.prototype.skip = function() {
+  this.runnable().skip();
+};
+
+/**
+ * Set or get a number of allowed retries on failed tests
+ *
+ * @private
+ * @param {number} n
+ * @return {Context} self
+ */
+Context.prototype.retries = function(n) {
+  if (!arguments.length) {
+    return this.runnable().retries();
+  }
+  this.runnable().retries(n);
+  return this;
+};
+
+},{}],6:[function(require,module,exports){
+'use strict';
+/**
+ * @module Errors
+ */
+/**
+ * Factory functions to create throwable error objects
+ */
+
+/**
+ * Creates an error object to be thrown when no files to be tested could be found using specified pattern.
+ *
+ * @public
+ * @param {string} message - Error message to be displayed.
+ * @param {string} pattern - User-specified argument value.
+ * @returns {Error} instance detailing the error condition
+ */
+function createNoFilesMatchPatternError(message, pattern) {
+  var err = new Error(message);
+  err.code = 'ERR_MOCHA_NO_FILES_MATCH_PATTERN';
+  err.pattern = pattern;
+  return err;
+}
+
+/**
+ * Creates an error object to be thrown when the reporter specified in the options was not found.
+ *
+ * @public
+ * @param {string} message - Error message to be displayed.
+ * @param {string} reporter - User-specified reporter value.
+ * @returns {Error} instance detailing the error condition
+ */
+function createInvalidReporterError(message, reporter) {
+  var err = new TypeError(message);
+  err.code = 'ERR_MOCHA_INVALID_REPORTER';
+  err.reporter = reporter;
+  return err;
+}
+
+/**
+ * Creates an error object to be thrown when the interface specified in the options was not found.
+ *
+ * @public
+ * @param {string} message - Error message to be displayed.
+ * @param {string} ui - User-specified interface value.
+ * @returns {Error} instance detailing the error condition
+ */
+function createInvalidInterfaceError(message, ui) {
+  var err = new Error(message);
+  err.code = 'ERR_MOCHA_INVALID_INTERFACE';
+  err.interface = ui;
+  return err;
+}
+
+/**
+ * Creates an error object to be thrown when a behavior, option, or parameter is unsupported.
+ *
+ * @public
+ * @param {string} message - Error message to be displayed.
+ * @returns {Error} instance detailing the error condition
+ */
+function createUnsupportedError(message) {
+  var err = new Error(message);
+  err.code = 'ERR_MOCHA_UNSUPPORTED';
+  return err;
+}
+
+/**
+ * Creates an error object to be thrown when an argument is missing.
+ *
+ * @public
+ * @param {string} message - Error message to be displayed.
+ * @param {string} argument - Argument name.
+ * @param {string} expected - Expected argument datatype.
+ * @returns {Error} instance detailing the error condition
+ */
+function createMissingArgumentError(message, argument, expected) {
+  return createInvalidArgumentTypeError(message, argument, expected);
+}
+
+/**
+ * Creates an error object to be thrown when an argument did not use the supported type
+ *
+ * @public
+ * @param {string} message - Error message to be displayed.
+ * @param {string} argument - Argument name.
+ * @param {string} expected - Expected argument datatype.
+ * @returns {Error} instance detailing the error condition
+ */
+function createInvalidArgumentTypeError(message, argument, expected) {
+  var err = new TypeError(message);
+  err.code = 'ERR_MOCHA_INVALID_ARG_TYPE';
+  err.argument = argument;
+  err.expected = expected;
+  err.actual = typeof argument;
+  return err;
+}
+
+/**
+ * Creates an error object to be thrown when an argument did not use the supported value
+ *
+ * @public
+ * @param {string} message - Error message to be displayed.
+ * @param {string} argument - Argument name.
+ * @param {string} value - Argument value.
+ * @param {string} [reason] - Why value is invalid.
+ * @returns {Error} instance detailing the error condition
+ */
+function createInvalidArgumentValueError(message, argument, value, reason) {
+  var err = new TypeError(message);
+  err.code = 'ERR_MOCHA_INVALID_ARG_VALUE';
+  err.argument = argument;
+  err.value = value;
+  err.reason = typeof reason !== 'undefined' ? reason : 'is invalid';
+  return err;
+}
+
+/**
+ * Creates an error object to be thrown when an exception was caught, but the `Error` is falsy or undefined.
+ *
+ * @public
+ * @param {string} message - Error message to be displayed.
+ * @returns {Error} instance detailing the error condition
+ */
+function createInvalidExceptionError(message, value) {
+  var err = new Error(message);
+  err.code = 'ERR_MOCHA_INVALID_EXCEPTION';
+  err.valueType = typeof value;
+  err.value = value;
+  return err;
+}
+
+module.exports = {
+  createInvalidArgumentTypeError: createInvalidArgumentTypeError,
+  createInvalidArgumentValueError: createInvalidArgumentValueError,
+  createInvalidExceptionError: createInvalidExceptionError,
+  createInvalidInterfaceError: createInvalidInterfaceError,
+  createInvalidReporterError: createInvalidReporterError,
+  createMissingArgumentError: createMissingArgumentError,
+  createNoFilesMatchPatternError: createNoFilesMatchPatternError,
+  createUnsupportedError: createUnsupportedError
+};
+
+},{}],7:[function(require,module,exports){
+'use strict';
+
+var Runnable = require('./runnable');
+var inherits = require('./utils').inherits;
+
+/**
+ * Expose `Hook`.
+ */
+
+module.exports = Hook;
+
+/**
+ * Initialize a new `Hook` with the given `title` and callback `fn`
+ *
+ * @class
+ * @extends Runnable
+ * @param {String} title
+ * @param {Function} fn
+ */
+function Hook(title, fn) {
+  Runnable.call(this, title, fn);
+  this.type = 'hook';
+}
+
+/**
+ * Inherit from `Runnable.prototype`.
+ */
+inherits(Hook, Runnable);
+
+/**
+ * Get or set the test `err`.
+ *
+ * @memberof Hook
+ * @public
+ * @param {Error} err
+ * @return {Error}
+ */
+Hook.prototype.error = function(err) {
+  if (!arguments.length) {
+    err = this._error;
+    this._error = null;
+    return err;
+  }
+
+  this._error = err;
+};
+
+},{"./runnable":33,"./utils":38}],8:[function(require,module,exports){
+'use strict';
+
+var Test = require('../test');
+var EVENT_FILE_PRE_REQUIRE = require('../suite').constants
+  .EVENT_FILE_PRE_REQUIRE;
+
+/**
+ * BDD-style interface:
+ *
+ *      describe('Array', function() {
+ *        describe('#indexOf()', function() {
+ *          it('should return -1 when not present', function() {
+ *            // ...
+ *          });
+ *
+ *          it('should return the index when present', function() {
+ *            // ...
+ *          });
+ *        });
+ *      });
+ *
+ * @param {Suite} suite Root suite.
+ */
+module.exports = function bddInterface(suite) {
+  var suites = [suite];
+
+  suite.on(EVENT_FILE_PRE_REQUIRE, function(context, file, mocha) {
+    var common = require('./common')(suites, context, mocha);
+
+    context.before = common.before;
+    context.after = common.after;
+    context.beforeEach = common.beforeEach;
+    context.afterEach = common.afterEach;
+    context.run = mocha.options.delay && common.runWithSuite(suite);
+    /**
+     * Describe a "suite" with the given `title`
+     * and callback `fn` containing nested suites
+     * and/or tests.
+     */
+
+    context.describe = context.context = function(title, fn) {
+      return common.suite.create({
+        title: title,
+        file: file,
+        fn: fn
+      });
+    };
+
+    /**
+     * Pending describe.
+     */
+
+    context.xdescribe = context.xcontext = context.describe.skip = function(
+      title,
+      fn
+    ) {
+      return common.suite.skip({
+        title: title,
+        file: file,
+        fn: fn
+      });
+    };
+
+    /**
+     * Exclusive suite.
+     */
+
+    context.describe.only = function(title, fn) {
+      return common.suite.only({
+        title: title,
+        file: file,
+        fn: fn
+      });
+    };
+
+    /**
+     * Describe a specification or test-case
+     * with the given `title` and callback `fn`
+     * acting as a thunk.
+     */
+
+    context.it = context.specify = function(title, fn) {
+      var suite = suites[0];
+      if (suite.isPending()) {
+        fn = null;
+      }
+      var test = new Test(title, fn);
+      test.file = file;
+      suite.addTest(test);
+      return test;
+    };
+
+    /**
+     * Exclusive test-case.
+     */
+
+    context.it.only = function(title, fn) {
+      return common.test.only(mocha, context.it(title, fn));
+    };
+
+    /**
+     * Pending test case.
+     */
+
+    context.xit = context.xspecify = context.it.skip = function(title) {
+      return context.it(title);
+    };
+
+    /**
+     * Number of attempts to retry.
+     */
+    context.it.retries = function(n) {
+      context.retries(n);
+    };
+  });
+};
+
+module.exports.description = 'BDD or RSpec style [default]';
+
+},{"../suite":36,"../test":37,"./common":9}],9:[function(require,module,exports){
+'use strict';
+
+var Suite = require('../suite');
+var errors = require('../errors');
+var createMissingArgumentError = errors.createMissingArgumentError;
+
+/**
+ * Functions common to more than one interface.
+ *
+ * @param {Suite[]} suites
+ * @param {Context} context
+ * @param {Mocha} mocha
+ * @return {Object} An object containing common functions.
+ */
+module.exports = function(suites, context, mocha) {
+  /**
+   * Check if the suite should be tested.
+   *
+   * @private
+   * @param {Suite} suite - suite to check
+   * @returns {boolean}
+   */
+  function shouldBeTested(suite) {
+    return (
+      !mocha.options.grep ||
+      (mocha.options.grep &&
+        mocha.options.grep.test(suite.fullTitle()) &&
+        !mocha.options.invert)
+    );
+  }
+
+  return {
+    /**
+     * This is only present if flag --delay is passed into Mocha. It triggers
+     * root suite execution.
+     *
+     * @param {Suite} suite The root suite.
+     * @return {Function} A function which runs the root suite
+     */
+    runWithSuite: function runWithSuite(suite) {
+      return function run() {
+        suite.run();
+      };
+    },
+
+    /**
+     * Execute before running tests.
+     *
+     * @param {string} name
+     * @param {Function} fn
+     */
+    before: function(name, fn) {
+      suites[0].beforeAll(name, fn);
+    },
+
+    /**
+     * Execute after running tests.
+     *
+     * @param {string} name
+     * @param {Function} fn
+     */
+    after: function(name, fn) {
+      suites[0].afterAll(name, fn);
+    },
+
+    /**
+     * Execute before each test case.
+     *
+     * @param {string} name
+     * @param {Function} fn
+     */
+    beforeEach: function(name, fn) {
+      suites[0].beforeEach(name, fn);
+    },
+
+    /**
+     * Execute after each test case.
+     *
+     * @param {string} name
+     * @param {Function} fn
+     */
+    afterEach: function(name, fn) {
+      suites[0].afterEach(name, fn);
+    },
+
+    suite: {
+      /**
+       * Create an exclusive Suite; convenience function
+       * See docstring for create() below.
+       *
+       * @param {Object} opts
+       * @returns {Suite}
+       */
+      only: function only(opts) {
+        opts.isOnly = true;
+        return this.create(opts);
+      },
+
+      /**
+       * Create a Suite, but skip it; convenience function
+       * See docstring for create() below.
+       *
+       * @param {Object} opts
+       * @returns {Suite}
+       */
+      skip: function skip(opts) {
+        opts.pending = true;
+        return this.create(opts);
+      },
+
+      /**
+       * Creates a suite.
+       *
+       * @param {Object} opts Options
+       * @param {string} opts.title Title of Suite
+       * @param {Function} [opts.fn] Suite Function (not always applicable)
+       * @param {boolean} [opts.pending] Is Suite pending?
+       * @param {string} [opts.file] Filepath where this Suite resides
+       * @param {boolean} [opts.isOnly] Is Suite exclusive?
+       * @returns {Suite}
+       */
+      create: function create(opts) {
+        var suite = Suite.create(suites[0], opts.title);
+        suite.pending = Boolean(opts.pending);
+        suite.file = opts.file;
+        suites.unshift(suite);
+        if (opts.isOnly) {
+          if (mocha.options.forbidOnly && shouldBeTested(suite)) {
+            throw new Error('`.only` forbidden');
+          }
+
+          suite.parent.appendOnlySuite(suite);
+        }
+        if (suite.pending) {
+          if (mocha.options.forbidPending && shouldBeTested(suite)) {
+            throw new Error('Pending test forbidden');
+          }
+        }
+        if (typeof opts.fn === 'function') {
+          opts.fn.call(suite);
+          suites.shift();
+        } else if (typeof opts.fn === 'undefined' && !suite.pending) {
+          throw createMissingArgumentError(
+            'Suite "' +
+              suite.fullTitle() +
+              '" was defined but no callback was supplied. ' +
+              'Supply a callback or explicitly skip the suite.',
+            'callback',
+            'function'
+          );
+        } else if (!opts.fn && suite.pending) {
+          suites.shift();
+        }
+
+        return suite;
+      }
+    },
+
+    test: {
+      /**
+       * Exclusive test-case.
+       *
+       * @param {Object} mocha
+       * @param {Function} test
+       * @returns {*}
+       */
+      only: function(mocha, test) {
+        test.parent.appendOnlyTest(test);
+        return test;
+      },
+
+      /**
+       * Pending test case.
+       *
+       * @param {string} title
+       */
+      skip: function(title) {
+        context.test(title);
+      },
+
+      /**
+       * Number of retry attempts
+       *
+       * @param {number} n
+       */
+      retries: function(n) {
+        context.retries(n);
+      }
+    }
+  };
+};
+
+},{"../errors":6,"../suite":36}],10:[function(require,module,exports){
+'use strict';
+var Suite = require('../suite');
+var Test = require('../test');
+
+/**
+ * Exports-style (as Node.js module) interface:
+ *
+ *     exports.Array = {
+ *       '#indexOf()': {
+ *         'should return -1 when the value is not present': function() {
+ *
+ *         },
+ *
+ *         'should return the correct index when the value is present': function() {
+ *
+ *         }
+ *       }
+ *     };
+ *
+ * @param {Suite} suite Root suite.
+ */
+module.exports = function(suite) {
+  var suites = [suite];
+
+  suite.on(Suite.constants.EVENT_FILE_REQUIRE, visit);
+
+  function visit(obj, file) {
+    var suite;
+    for (var key in obj) {
+      if (typeof obj[key] === 'function') {
+        var fn = obj[key];
+        switch (key) {
+          case 'before':
+            suites[0].beforeAll(fn);
+            break;
+          case 'after':
+            suites[0].afterAll(fn);
+            break;
+          case 'beforeEach':
+            suites[0].beforeEach(fn);
+            break;
+          case 'afterEach':
+            suites[0].afterEach(fn);
+            break;
+          default:
+            var test = new Test(key, fn);
+            test.file = file;
+            suites[0].addTest(test);
+        }
+      } else {
+        suite = Suite.create(suites[0], key);
+        suites.unshift(suite);
+        visit(obj[key], file);
+        suites.shift();
+      }
+    }
+  }
+};
+
+module.exports.description = 'Node.js module ("exports") style';
+
+},{"../suite":36,"../test":37}],11:[function(require,module,exports){
+'use strict';
+
+exports.bdd = require('./bdd');
+exports.tdd = require('./tdd');
+exports.qunit = require('./qunit');
+exports.exports = require('./exports');
+
+},{"./bdd":8,"./exports":10,"./qunit":12,"./tdd":13}],12:[function(require,module,exports){
+'use strict';
+
+var Test = require('../test');
+var EVENT_FILE_PRE_REQUIRE = require('../suite').constants
+  .EVENT_FILE_PRE_REQUIRE;
+
+/**
+ * QUnit-style interface:
+ *
+ *     suite('Array');
+ *
+ *     test('#length', function() {
+ *       var arr = [1,2,3];
+ *       ok(arr.length == 3);
+ *     });
+ *
+ *     test('#indexOf()', function() {
+ *       var arr = [1,2,3];
+ *       ok(arr.indexOf(1) == 0);
+ *       ok(arr.indexOf(2) == 1);
+ *       ok(arr.indexOf(3) == 2);
+ *     });
+ *
+ *     suite('String');
+ *
+ *     test('#length', function() {
+ *       ok('foo'.length == 3);
+ *     });
+ *
+ * @param {Suite} suite Root suite.
+ */
+module.exports = function qUnitInterface(suite) {
+  var suites = [suite];
+
+  suite.on(EVENT_FILE_PRE_REQUIRE, function(context, file, mocha) {
+    var common = require('./common')(suites, context, mocha);
+
+    context.before = common.before;
+    context.after = common.after;
+    context.beforeEach = common.beforeEach;
+    context.afterEach = common.afterEach;
+    context.run = mocha.options.delay && common.runWithSuite(suite);
+    /**
+     * Describe a "suite" with the given `title`.
+     */
+
+    context.suite = function(title) {
+      if (suites.length > 1) {
+        suites.shift();
+      }
+      return common.suite.create({
+        title: title,
+        file: file,
+        fn: false
+      });
+    };
+
+    /**
+     * Exclusive Suite.
+     */
+
+    context.suite.only = function(title) {
+      if (suites.length > 1) {
+        suites.shift();
+      }
+      return common.suite.only({
+        title: title,
+        file: file,
+        fn: false
+      });
+    };
+
+    /**
+     * Describe a specification or test-case
+     * with the given `title` and callback `fn`
+     * acting as a thunk.
+     */
+
+    context.test = function(title, fn) {
+      var test = new Test(title, fn);
+      test.file = file;
+      suites[0].addTest(test);
+      return test;
+    };
+
+    /**
+     * Exclusive test-case.
+     */
+
+    context.test.only = function(title, fn) {
+      return common.test.only(mocha, context.test(title, fn));
+    };
+
+    context.test.skip = common.test.skip;
+    context.test.retries = common.test.retries;
+  });
+};
+
+module.exports.description = 'QUnit style';
+
+},{"../suite":36,"../test":37,"./common":9}],13:[function(require,module,exports){
+'use strict';
+
+var Test = require('../test');
+var EVENT_FILE_PRE_REQUIRE = require('../suite').constants
+  .EVENT_FILE_PRE_REQUIRE;
+
+/**
+ * TDD-style interface:
+ *
+ *      suite('Array', function() {
+ *        suite('#indexOf()', function() {
+ *          suiteSetup(function() {
+ *
+ *          });
+ *
+ *          test('should return -1 when not present', function() {
+ *
+ *          });
+ *
+ *          test('should return the index when present', function() {
+ *
+ *          });
+ *
+ *          suiteTeardown(function() {
+ *
+ *          });
+ *        });
+ *      });
+ *
+ * @param {Suite} suite Root suite.
+ */
+module.exports = function(suite) {
+  var suites = [suite];
+
+  suite.on(EVENT_FILE_PRE_REQUIRE, function(context, file, mocha) {
+    var common = require('./common')(suites, context, mocha);
+
+    context.setup = common.beforeEach;
+    context.teardown = common.afterEach;
+    context.suiteSetup = common.before;
+    context.suiteTeardown = common.after;
+    context.run = mocha.options.delay && common.runWithSuite(suite);
+
+    /**
+     * Describe a "suite" with the given `title` and callback `fn` containing
+     * nested suites and/or tests.
+     */
+    context.suite = function(title, fn) {
+      return common.suite.create({
+        title: title,
+        file: file,
+        fn: fn
+      });
+    };
+
+    /**
+     * Pending suite.
+     */
+    context.suite.skip = function(title, fn) {
+      return common.suite.skip({
+        title: title,
+        file: file,
+        fn: fn
+      });
+    };
+
+    /**
+     * Exclusive test-case.
+     */
+    context.suite.only = function(title, fn) {
+      return common.suite.only({
+        title: title,
+        file: file,
+        fn: fn
+      });
+    };
+
+    /**
+     * Describe a specification or test-case with the given `title` and
+     * callback `fn` acting as a thunk.
+     */
+    context.test = function(title, fn) {
+      var suite = suites[0];
+      if (suite.isPending()) {
+        fn = null;
+      }
+      var test = new Test(title, fn);
+      test.file = file;
+      suite.addTest(test);
+      return test;
+    };
+
+    /**
+     * Exclusive test-case.
+     */
+
+    context.test.only = function(title, fn) {
+      return common.test.only(mocha, context.test(title, fn));
+    };
+
+    context.test.skip = common.test.skip;
+    context.test.retries = common.test.retries;
+  });
+};
+
+module.exports.description =
+  'traditional "suite"/"test" instead of BDD\'s "describe"/"it"';
+
+},{"../suite":36,"../test":37,"./common":9}],14:[function(require,module,exports){
+(function (process,global){
+'use strict';
+
+/*!
+ * mocha
+ * Copyright(c) 2011 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+var escapeRe = require('escape-string-regexp');
+var path = require('path');
+var builtinReporters = require('./reporters');
+var growl = require('./growl');
+var utils = require('./utils');
+var mocharc = require('./mocharc.json');
+var errors = require('./errors');
+var Suite = require('./suite');
+var createStatsCollector = require('./stats-collector');
+var createInvalidReporterError = errors.createInvalidReporterError;
+var createInvalidInterfaceError = errors.createInvalidInterfaceError;
+var EVENT_FILE_PRE_REQUIRE = Suite.constants.EVENT_FILE_PRE_REQUIRE;
+var EVENT_FILE_POST_REQUIRE = Suite.constants.EVENT_FILE_POST_REQUIRE;
+var EVENT_FILE_REQUIRE = Suite.constants.EVENT_FILE_REQUIRE;
+var sQuote = utils.sQuote;
+
+exports = module.exports = Mocha;
+
+/**
+ * To require local UIs and reporters when running in node.
+ */
+
+if (!process.browser) {
+  var cwd = process.cwd();
+  module.paths.push(cwd, path.join(cwd, 'node_modules'));
+}
+
+/**
+ * Expose internals.
+ */
+
+/**
+ * @public
+ * @class utils
+ * @memberof Mocha
+ */
+exports.utils = utils;
+exports.interfaces = require('./interfaces');
+/**
+ * @public
+ * @memberof Mocha
+ */
+exports.reporters = builtinReporters;
+exports.Runnable = require('./runnable');
+exports.Context = require('./context');
+/**
+ *
+ * @memberof Mocha
+ */
+exports.Runner = require('./runner');
+exports.Suite = Suite;
+exports.Hook = require('./hook');
+exports.Test = require('./test');
+
+/**
+ * Constructs a new Mocha instance with `options`.
+ *
+ * @public
+ * @class Mocha
+ * @param {Object} [options] - Settings object.
+ * @param {boolean} [options.allowUncaught] - Propagate uncaught errors?
+ * @param {boolean} [options.asyncOnly] - Force `done` callback or promise?
+ * @param {boolean} [options.bail] - Bail after first test failure?
+ * @param {boolean} [options.checkLeaks] - If true, check leaks.
+ * @param {boolean} [options.delay] - Delay root suite execution?
+ * @param {boolean} [options.enableTimeouts] - Enable timeouts?
+ * @param {string} [options.fgrep] - Test filter given string.
+ * @param {boolean} [options.forbidOnly] - Tests marked `only` fail the suite?
+ * @param {boolean} [options.forbidPending] - Pending tests fail the suite?
+ * @param {boolean} [options.fullStackTrace] - Full stacktrace upon failure?
+ * @param {string[]} [options.global] - Variables expected in global scope.
+ * @param {RegExp|string} [options.grep] - Test filter given regular expression.
+ * @param {boolean} [options.growl] - Enable desktop notifications?
+ * @param {boolean} [options.hideDiff] - Suppress diffs from failures?
+ * @param {boolean} [options.ignoreLeaks] - Ignore global leaks?
+ * @param {boolean} [options.invert] - Invert test filter matches?
+ * @param {boolean} [options.noHighlighting] - Disable syntax highlighting?
+ * @param {string} [options.reporter] - Reporter name.
+ * @param {Object} [options.reporterOption] - Reporter settings object.
+ * @param {number} [options.retries] - Number of times to retry failed tests.
+ * @param {number} [options.slow] - Slow threshold value.
+ * @param {number|string} [options.timeout] - Timeout threshold value.
+ * @param {string} [options.ui] - Interface name.
+ * @param {boolean} [options.color] - Color TTY output from reporter?
+ * @param {boolean} [options.useInlineDiffs] - Use inline diffs?
+ */
+function Mocha(options) {
+  options = utils.assign({}, mocharc, options || {});
+  this.files = [];
+  this.options = options;
+  // root suite
+  this.suite = new exports.Suite('', new exports.Context(), true);
+
+  if ('useColors' in options) {
+    utils.deprecate(
+      'useColors is DEPRECATED and will be removed from a future version of Mocha. Instead, use the "color" option'
+    );
+    options.color = 'color' in options ? options.color : options.useColors;
+  }
+
+  this.grep(options.grep)
+    .fgrep(options.fgrep)
+    .ui(options.ui)
+    .bail(options.bail)
+    .reporter(options.reporter, options.reporterOptions)
+    .useColors(options.color)
+    .slow(options.slow)
+    .useInlineDiffs(options.inlineDiffs)
+    .globals(options.globals);
+
+  if ('enableTimeouts' in options) {
+    utils.deprecate(
+      'enableTimeouts is DEPRECATED and will be removed from a future version of Mocha. Instead, use "timeout: false" to disable timeouts.'
+    );
+  }
+  this.timeout(
+    options.enableTimeouts === false || options.timeout === false
+      ? 0
+      : options.timeout
+  );
+
+  if ('retries' in options) {
+    this.retries(options.retries);
+  }
+
+  if ('diff' in options) {
+    this.hideDiff(!options.diff);
+  }
+
+  [
+    'allowUncaught',
+    'asyncOnly',
+    'checkLeaks',
+    'delay',
+    'forbidOnly',
+    'forbidPending',
+    'fullTrace',
+    'growl',
+    'invert'
+  ].forEach(function(opt) {
+    if (options[opt]) {
+      this[opt]();
+    }
+  }, this);
+}
+
+/**
+ * Enables or disables bailing on the first failure.
+ *
+ * @public
+ * @see {@link https://mochajs.org/#-b---bail|CLI option}
+ * @param {boolean} [bail=true] - Whether to bail on first error.
+ * @returns {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.bail = function(bail) {
+  if (!arguments.length) {
+    bail = true;
+  }
+  this.suite.bail(bail);
+  return this;
+};
+
+/**
+ * @summary
+ * Adds `file` to be loaded for execution.
+ *
+ * @description
+ * Useful for generic setup code that must be included within test suite.
+ *
+ * @public
+ * @see {@link https://mochajs.org/#--file-file|CLI option}
+ * @param {string} file - Pathname of file to be loaded.
+ * @returns {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.addFile = function(file) {
+  this.files.push(file);
+  return this;
+};
+
+/**
+ * Sets reporter to `reporter`, defaults to "spec".
+ *
+ * @public
+ * @see {@link https://mochajs.org/#-r---reporter-name|CLI option}
+ * @see {@link https://mochajs.org/#reporters|Reporters}
+ * @param {String|Function} reporter - Reporter name or constructor.
+ * @param {Object} [reporterOptions] - Options used to configure the reporter.
+ * @returns {Mocha} this
+ * @chainable
+ * @throws {Error} if requested reporter cannot be loaded
+ * @example
+ *
+ * // Use XUnit reporter and direct its output to file
+ * mocha.reporter('xunit', { output: '/path/to/testspec.xunit.xml' });
+ */
+Mocha.prototype.reporter = function(reporter, reporterOptions) {
+  if (typeof reporter === 'function') {
+    this._reporter = reporter;
+  } else {
+    reporter = reporter || 'spec';
+    var _reporter;
+    // Try to load a built-in reporter.
+    if (builtinReporters[reporter]) {
+      _reporter = builtinReporters[reporter];
+    }
+    // Try to load reporters from process.cwd() and node_modules
+    if (!_reporter) {
+      try {
+        _reporter = require(reporter);
+      } catch (err) {
+        if (
+          err.code !== 'MODULE_NOT_FOUND' ||
+          err.message.indexOf('Cannot find module') !== -1
+        ) {
+          // Try to load reporters from a path (absolute or relative)
+          try {
+            _reporter = require(path.resolve(process.cwd(), reporter));
+          } catch (_err) {
+            _err.code !== 'MODULE_NOT_FOUND' ||
+            _err.message.indexOf('Cannot find module') !== -1
+              ? console.warn(sQuote(reporter) + ' reporter not found')
+              : console.warn(
+                  sQuote(reporter) +
+                    ' reporter blew up with error:\n' +
+                    err.stack
+                );
+          }
+        } else {
+          console.warn(
+            sQuote(reporter) + ' reporter blew up with error:\n' + err.stack
+          );
+        }
+      }
+    }
+    if (!_reporter) {
+      throw createInvalidReporterError(
+        'invalid reporter ' + sQuote(reporter),
+        reporter
+      );
+    }
+    this._reporter = _reporter;
+  }
+  this.options.reporterOptions = reporterOptions;
+  return this;
+};
+
+/**
+ * Sets test UI `name`, defaults to "bdd".
+ *
+ * @public
+ * @see {@link https://mochajs.org/#-u---ui-name|CLI option}
+ * @see {@link https://mochajs.org/#interfaces|Interface DSLs}
+ * @param {string|Function} [ui=bdd] - Interface name or class.
+ * @returns {Mocha} this
+ * @chainable
+ * @throws {Error} if requested interface cannot be loaded
+ */
+Mocha.prototype.ui = function(ui) {
+  var bindInterface;
+  if (typeof ui === 'function') {
+    bindInterface = ui;
+  } else {
+    ui = ui || 'bdd';
+    bindInterface = exports.interfaces[ui];
+    if (!bindInterface) {
+      try {
+        bindInterface = require(ui);
+      } catch (err) {
+        throw createInvalidInterfaceError(
+          'invalid interface ' + sQuote(ui),
+          ui
+        );
+      }
+    }
+  }
+  bindInterface(this.suite);
+
+  this.suite.on(EVENT_FILE_PRE_REQUIRE, function(context) {
+    exports.afterEach = context.afterEach || context.teardown;
+    exports.after = context.after || context.suiteTeardown;
+    exports.beforeEach = context.beforeEach || context.setup;
+    exports.before = context.before || context.suiteSetup;
+    exports.describe = context.describe || context.suite;
+    exports.it = context.it || context.test;
+    exports.xit = context.xit || (context.test && context.test.skip);
+    exports.setup = context.setup || context.beforeEach;
+    exports.suiteSetup = context.suiteSetup || context.before;
+    exports.suiteTeardown = context.suiteTeardown || context.after;
+    exports.suite = context.suite || context.describe;
+    exports.teardown = context.teardown || context.afterEach;
+    exports.test = context.test || context.it;
+    exports.run = context.run;
+  });
+
+  return this;
+};
+
+/**
+ * Loads `files` prior to execution.
+ *
+ * @description
+ * The implementation relies on Node's `require` to execute
+ * the test interface functions and will be subject to its cache.
+ *
+ * @private
+ * @see {@link Mocha#addFile}
+ * @see {@link Mocha#run}
+ * @see {@link Mocha#unloadFiles}
+ * @param {Function} [fn] - Callback invoked upon completion.
+ */
+Mocha.prototype.loadFiles = function(fn) {
+  var self = this;
+  var suite = this.suite;
+  this.files.forEach(function(file) {
+    file = path.resolve(file);
+    suite.emit(EVENT_FILE_PRE_REQUIRE, global, file, self);
+    suite.emit(EVENT_FILE_REQUIRE, require(file), file, self);
+    suite.emit(EVENT_FILE_POST_REQUIRE, global, file, self);
+  });
+  fn && fn();
+};
+
+/**
+ * Removes a previously loaded file from Node's `require` cache.
+ *
+ * @private
+ * @static
+ * @see {@link Mocha#unloadFiles}
+ * @param {string} file - Pathname of file to be unloaded.
+ */
+Mocha.unloadFile = function(file) {
+  delete require.cache[require.resolve(file)];
+};
+
+/**
+ * Unloads `files` from Node's `require` cache.
+ *
+ * @description
+ * This allows files to be "freshly" reloaded, providing the ability
+ * to reuse a Mocha instance programmatically.
+ *
+ * <strong>Intended for consumers &mdash; not used internally</strong>
+ *
+ * @public
+ * @see {@link Mocha.unloadFile}
+ * @see {@link Mocha#loadFiles}
+ * @see {@link Mocha#run}
+ * @returns {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.unloadFiles = function() {
+  this.files.forEach(Mocha.unloadFile);
+  return this;
+};
+
+/**
+ * Sets `grep` filter after escaping RegExp special characters.
+ *
+ * @public
+ * @see {@link Mocha#grep}
+ * @param {string} str - Value to be converted to a regexp.
+ * @returns {Mocha} this
+ * @chainable
+ * @example
+ *
+ * // Select tests whose full title begins with `"foo"` followed by a period
+ * mocha.fgrep('foo.');
+ */
+Mocha.prototype.fgrep = function(str) {
+  if (!str) {
+    return this;
+  }
+  return this.grep(new RegExp(escapeRe(str)));
+};
+
+/**
+ * @summary
+ * Sets `grep` filter used to select specific tests for execution.
+ *
+ * @description
+ * If `re` is a regexp-like string, it will be converted to regexp.
+ * The regexp is tested against the full title of each test (i.e., the
+ * name of the test preceded by titles of each its ancestral suites).
+ * As such, using an <em>exact-match</em> fixed pattern against the
+ * test name itself will not yield any matches.
+ * <br>
+ * <strong>Previous filter value will be overwritten on each call!</strong>
+ *
+ * @public
+ * @see {@link https://mochajs.org/#-g---grep-pattern|CLI option}
+ * @see {@link Mocha#fgrep}
+ * @see {@link Mocha#invert}
+ * @param {RegExp|String} re - Regular expression used to select tests.
+ * @return {Mocha} this
+ * @chainable
+ * @example
+ *
+ * // Select tests whose full title contains `"match"`, ignoring case
+ * mocha.grep(/match/i);
+ * @example
+ *
+ * // Same as above but with regexp-like string argument
+ * mocha.grep('/match/i');
+ * @example
+ *
+ * // ## Anti-example
+ * // Given embedded test `it('only-this-test')`...
+ * mocha.grep('/^only-this-test$/');    // NO! Use `.only()` to do this!
+ */
+Mocha.prototype.grep = function(re) {
+  if (utils.isString(re)) {
+    // extract args if it's regex-like, i.e: [string, pattern, flag]
+    var arg = re.match(/^\/(.*)\/(g|i|)$|.*/);
+    this.options.grep = new RegExp(arg[1] || arg[0], arg[2]);
+  } else {
+    this.options.grep = re;
+  }
+  return this;
+};
+
+/**
+ * Inverts `grep` matches.
+ *
+ * @public
+ * @see {@link Mocha#grep}
+ * @return {Mocha} this
+ * @chainable
+ * @example
+ *
+ * // Select tests whose full title does *not* contain `"match"`, ignoring case
+ * mocha.grep(/match/i).invert();
+ */
+Mocha.prototype.invert = function() {
+  this.options.invert = true;
+  return this;
+};
+
+/**
+ * Enables or disables ignoring global leaks.
+ *
+ * @public
+ * @see {@link Mocha#checkLeaks}
+ * @param {boolean} ignoreLeaks - Whether to ignore global leaks.
+ * @return {Mocha} this
+ * @chainable
+ * @example
+ *
+ * // Ignore global leaks
+ * mocha.ignoreLeaks(true);
+ */
+Mocha.prototype.ignoreLeaks = function(ignoreLeaks) {
+  this.options.ignoreLeaks = Boolean(ignoreLeaks);
+  return this;
+};
+
+/**
+ * Enables checking for global variables leaked while running tests.
+ *
+ * @public
+ * @see {@link https://mochajs.org/#--check-leaks|CLI option}
+ * @see {@link Mocha#ignoreLeaks}
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.checkLeaks = function() {
+  this.options.ignoreLeaks = false;
+  return this;
+};
+
+/**
+ * Displays full stack trace upon test failure.
+ *
+ * @public
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.fullTrace = function() {
+  this.options.fullStackTrace = true;
+  return this;
+};
+
+/**
+ * Enables desktop notification support if prerequisite software installed.
+ *
+ * @public
+ * @see {@link Mocha#isGrowlCapable}
+ * @see {@link Mocha#_growl}
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.growl = function() {
+  this.options.growl = this.isGrowlCapable();
+  if (!this.options.growl) {
+    var detail = process.browser
+      ? 'notification support not available in this browser...'
+      : 'notification support prerequisites not installed...';
+    console.error(detail + ' cannot enable!');
+  }
+  return this;
+};
+
+/**
+ * @summary
+ * Determines if Growl support seems likely.
+ *
+ * @description
+ * <strong>Not available when run in browser.</strong>
+ *
+ * @private
+ * @see {@link Growl#isCapable}
+ * @see {@link Mocha#growl}
+ * @return {boolean} whether Growl support can be expected
+ */
+Mocha.prototype.isGrowlCapable = growl.isCapable;
+
+/**
+ * Implements desktop notifications using a pseudo-reporter.
+ *
+ * @private
+ * @see {@link Mocha#growl}
+ * @see {@link Growl#notify}
+ * @param {Runner} runner - Runner instance.
+ */
+Mocha.prototype._growl = growl.notify;
+
+/**
+ * Specifies whitelist of variable names to be expected in global scope.
+ *
+ * @public
+ * @see {@link https://mochajs.org/#--globals-names|CLI option}
+ * @see {@link Mocha#checkLeaks}
+ * @param {String[]|String} globals - Accepted global variable name(s).
+ * @return {Mocha} this
+ * @chainable
+ * @example
+ *
+ * // Specify variables to be expected in global scope
+ * mocha.globals(['jQuery', 'MyLib']);
+ */
+Mocha.prototype.globals = function(globals) {
+  this.options.globals = (this.options.globals || [])
+    .concat(globals)
+    .filter(Boolean);
+  return this;
+};
+
+/**
+ * Enables or disables TTY color output by screen-oriented reporters.
+ *
+ * @public
+ * @param {boolean} colors - Whether to enable color output.
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.useColors = function(colors) {
+  if (colors !== undefined) {
+    this.options.useColors = colors;
+  }
+  return this;
+};
+
+/**
+ * Determines if reporter should use inline diffs (rather than +/-)
+ * in test failure output.
+ *
+ * @public
+ * @param {boolean} inlineDiffs - Whether to use inline diffs.
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.useInlineDiffs = function(inlineDiffs) {
+  this.options.useInlineDiffs = inlineDiffs !== undefined && inlineDiffs;
+  return this;
+};
+
+/**
+ * Determines if reporter should include diffs in test failure output.
+ *
+ * @public
+ * @param {boolean} hideDiff - Whether to hide diffs.
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.hideDiff = function(hideDiff) {
+  this.options.hideDiff = hideDiff !== undefined && hideDiff;
+  return this;
+};
+
+/**
+ * @summary
+ * Sets timeout threshold value.
+ *
+ * @description
+ * A string argument can use shorthand (such as "2s") and will be converted.
+ * If the value is `0`, timeouts will be disabled.
+ *
+ * @public
+ * @see {@link https://mochajs.org/#-t---timeout-ms|CLI option}
+ * @see {@link https://mochajs.org/#--no-timeouts|CLI option}
+ * @see {@link https://mochajs.org/#timeouts|Timeouts}
+ * @see {@link Mocha#enableTimeouts}
+ * @param {number|string} msecs - Timeout threshold value.
+ * @return {Mocha} this
+ * @chainable
+ * @example
+ *
+ * // Sets timeout to one second
+ * mocha.timeout(1000);
+ * @example
+ *
+ * // Same as above but using string argument
+ * mocha.timeout('1s');
+ */
+Mocha.prototype.timeout = function(msecs) {
+  this.suite.timeout(msecs);
+  return this;
+};
+
+/**
+ * Sets the number of times to retry failed tests.
+ *
+ * @public
+ * @see {@link https://mochajs.org/#retry-tests|Retry Tests}
+ * @param {number} retry - Number of times to retry failed tests.
+ * @return {Mocha} this
+ * @chainable
+ * @example
+ *
+ * // Allow any failed test to retry one more time
+ * mocha.retries(1);
+ */
+Mocha.prototype.retries = function(n) {
+  this.suite.retries(n);
+  return this;
+};
+
+/**
+ * Sets slowness threshold value.
+ *
+ * @public
+ * @see {@link https://mochajs.org/#-s---slow-ms|CLI option}
+ * @param {number} msecs - Slowness threshold value.
+ * @return {Mocha} this
+ * @chainable
+ * @example
+ *
+ * // Sets "slow" threshold to half a second
+ * mocha.slow(500);
+ * @example
+ *
+ * // Same as above but using string argument
+ * mocha.slow('0.5s');
+ */
+Mocha.prototype.slow = function(msecs) {
+  this.suite.slow(msecs);
+  return this;
+};
+
+/**
+ * Enables or disables timeouts.
+ *
+ * @public
+ * @see {@link https://mochajs.org/#-t---timeout-ms|CLI option}
+ * @see {@link https://mochajs.org/#--no-timeouts|CLI option}
+ * @param {boolean} enableTimeouts - Whether to enable timeouts.
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.enableTimeouts = function(enableTimeouts) {
+  this.suite.enableTimeouts(
+    arguments.length && enableTimeouts !== undefined ? enableTimeouts : true
+  );
+  return this;
+};
+
+/**
+ * Forces all tests to either accept a `done` callback or return a promise.
+ *
+ * @public
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.asyncOnly = function() {
+  this.options.asyncOnly = true;
+  return this;
+};
+
+/**
+ * Disables syntax highlighting (in browser).
+ *
+ * @public
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.noHighlighting = function() {
+  this.options.noHighlighting = true;
+  return this;
+};
+
+/**
+ * Enables uncaught errors to propagate (in browser).
+ *
+ * @public
+ * @return {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.allowUncaught = function() {
+  this.options.allowUncaught = true;
+  return this;
+};
+
+/**
+ * @summary
+ * Delays root suite execution.
+ *
+ * @description
+ * Used to perform asynch operations before any suites are run.
+ *
+ * @public
+ * @see {@link https://mochajs.org/#delayed-root-suite|delayed root suite}
+ * @returns {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.delay = function delay() {
+  this.options.delay = true;
+  return this;
+};
+
+/**
+ * Causes tests marked `only` to fail the suite.
+ *
+ * @public
+ * @returns {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.forbidOnly = function() {
+  this.options.forbidOnly = true;
+  return this;
+};
+
+/**
+ * Causes pending tests and tests marked `skip` to fail the suite.
+ *
+ * @public
+ * @returns {Mocha} this
+ * @chainable
+ */
+Mocha.prototype.forbidPending = function() {
+  this.options.forbidPending = true;
+  return this;
+};
+
+/**
+ * Mocha version as specified by "package.json".
+ *
+ * @name Mocha#version
+ * @type string
+ * @readonly
+ */
+Object.defineProperty(Mocha.prototype, 'version', {
+  value: require('../package.json').version,
+  configurable: false,
+  enumerable: true,
+  writable: false
+});
+
+/**
+ * Callback to be invoked when test execution is complete.
+ *
+ * @callback DoneCB
+ * @param {number} failures - Number of failures that occurred.
+ */
+
+/**
+ * Runs root suite and invokes `fn()` when complete.
+ *
+ * @description
+ * To run tests multiple times (or to run tests in files that are
+ * already in the `require` cache), make sure to clear them from
+ * the cache first!
+ *
+ * @public
+ * @see {@link Mocha#loadFiles}
+ * @see {@link Mocha#unloadFiles}
+ * @see {@link Runner#run}
+ * @param {DoneCB} [fn] - Callback invoked when test execution completed.
+ * @return {Runner} runner instance
+ */
+Mocha.prototype.run = function(fn) {
+  if (this.files.length) {
+    this.loadFiles();
+  }
+  var suite = this.suite;
+  var options = this.options;
+  options.files = this.files;
+  var runner = new exports.Runner(suite, options.delay);
+  createStatsCollector(runner);
+  var reporter = new this._reporter(runner, options);
+  runner.ignoreLeaks = options.ignoreLeaks !== false;
+  runner.fullStackTrace = options.fullStackTrace;
+  runner.asyncOnly = options.asyncOnly;
+  runner.allowUncaught = options.allowUncaught;
+  runner.forbidOnly = options.forbidOnly;
+  runner.forbidPending = options.forbidPending;
+  if (options.grep) {
+    runner.grep(options.grep, options.invert);
+  }
+  if (options.globals) {
+    runner.globals(options.globals);
+  }
+  if (options.growl) {
+    this._growl(runner);
+  }
+  if (options.useColors !== undefined) {
+    exports.reporters.Base.useColors = options.useColors;
+  }
+  exports.reporters.Base.inlineDiffs = options.useInlineDiffs;
+  exports.reporters.Base.hideDiff = options.hideDiff;
+
+  function done(failures) {
+    fn = fn || utils.noop;
+    if (reporter.done) {
+      reporter.done(failures, fn);
+    } else {
+      fn(failures);
+    }
+  }
+
+  return runner.run(done);
+};
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"../package.json":89,"./context":5,"./errors":6,"./growl":2,"./hook":7,"./interfaces":11,"./mocharc.json":15,"./reporters":21,"./runnable":33,"./runner":34,"./stats-collector":35,"./suite":36,"./test":37,"./utils":38,"_process":68,"escape-string-regexp":49,"path":42}],15:[function(require,module,exports){
+module.exports={
+  "diff": true,
+  "extension": ["js"],
+  "opts": "./test/mocha.opts",
+  "package": "./package.json",
+  "reporter": "spec",
+  "slow": 75,
+  "timeout": 2000,
+  "ui": "bdd"
+}
+
+},{}],16:[function(require,module,exports){
+'use strict';
+
+module.exports = Pending;
+
+/**
+ * Initialize a new `Pending` error with the given message.
+ *
+ * @param {string} message
+ */
+function Pending(message) {
+  this.message = message;
+}
+
+},{}],17:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module Base
+ */
+/**
+ * Module dependencies.
+ */
+
+var tty = require('tty');
+var diff = require('diff');
+var milliseconds = require('ms');
+var utils = require('../utils');
+var supportsColor = process.browser ? null : require('supports-color');
+var constants = require('../runner').constants;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+
+/**
+ * Expose `Base`.
+ */
+
+exports = module.exports = Base;
+
+/**
+ * Check if both stdio streams are associated with a tty.
+ */
+
+var isatty = tty.isatty(1) && tty.isatty(2);
+
+/**
+ * Enable coloring by default, except in the browser interface.
+ */
+
+exports.useColors =
+  !process.browser &&
+  (supportsColor.stdout || process.env.MOCHA_COLORS !== undefined);
+
+/**
+ * Inline diffs instead of +/-
+ */
+
+exports.inlineDiffs = false;
+
+/**
+ * Default color map.
+ */
+
+exports.colors = {
+  pass: 90,
+  fail: 31,
+  'bright pass': 92,
+  'bright fail': 91,
+  'bright yellow': 93,
+  pending: 36,
+  suite: 0,
+  'error title': 0,
+  'error message': 31,
+  'error stack': 90,
+  checkmark: 32,
+  fast: 90,
+  medium: 33,
+  slow: 31,
+  green: 32,
+  light: 90,
+  'diff gutter': 90,
+  'diff added': 32,
+  'diff removed': 31
+};
+
+/**
+ * Default symbol map.
+ */
+
+exports.symbols = {
+  ok: '✓',
+  err: '✖',
+  dot: '․',
+  comma: ',',
+  bang: '!'
+};
+
+// With node.js on Windows: use symbols available in terminal default fonts
+if (process.platform === 'win32') {
+  exports.symbols.ok = '\u221A';
+  exports.symbols.err = '\u00D7';
+  exports.symbols.dot = '.';
+}
+
+/**
+ * Color `str` with the given `type`,
+ * allowing colors to be disabled,
+ * as well as user-defined color
+ * schemes.
+ *
+ * @param {string} type
+ * @param {string} str
+ * @return {string}
+ * @private
+ */
+var color = (exports.color = function(type, str) {
+  if (!exports.useColors) {
+    return String(str);
+  }
+  return '\u001b[' + exports.colors[type] + 'm' + str + '\u001b[0m';
+});
+
+/**
+ * Expose term window size, with some defaults for when stderr is not a tty.
+ */
+
+exports.window = {
+  width: 75
+};
+
+if (isatty) {
+  exports.window.width = process.stdout.getWindowSize
+    ? process.stdout.getWindowSize(1)[0]
+    : tty.getWindowSize()[1];
+}
+
+/**
+ * Expose some basic cursor interactions that are common among reporters.
+ */
+
+exports.cursor = {
+  hide: function() {
+    isatty && process.stdout.write('\u001b[?25l');
+  },
+
+  show: function() {
+    isatty && process.stdout.write('\u001b[?25h');
+  },
+
+  deleteLine: function() {
+    isatty && process.stdout.write('\u001b[2K');
+  },
+
+  beginningOfLine: function() {
+    isatty && process.stdout.write('\u001b[0G');
+  },
+
+  CR: function() {
+    if (isatty) {
+      exports.cursor.deleteLine();
+      exports.cursor.beginningOfLine();
+    } else {
+      process.stdout.write('\r');
+    }
+  }
+};
+
+function showDiff(err) {
+  return (
+    err &&
+    err.showDiff !== false &&
+    sameType(err.actual, err.expected) &&
+    err.expected !== undefined
+  );
+}
+
+function stringifyDiffObjs(err) {
+  if (!utils.isString(err.actual) || !utils.isString(err.expected)) {
+    err.actual = utils.stringify(err.actual);
+    err.expected = utils.stringify(err.expected);
+  }
+}
+
+/**
+ * Returns a diff between 2 strings with coloured ANSI output.
+ *
+ * The diff will be either inline or unified dependant on the value
+ * of `Base.inlineDiff`.
+ *
+ * @param {string} actual
+ * @param {string} expected
+ * @return {string} Diff
+ */
+var generateDiff = (exports.generateDiff = function(actual, expected) {
+  return exports.inlineDiffs
+    ? inlineDiff(actual, expected)
+    : unifiedDiff(actual, expected);
+});
+
+/**
+ * Output the given `failures` as a list.
+ *
+ * @public
+ * @memberof Mocha.reporters.Base
+ * @variation 1
+ * @param {Array} failures
+ */
+
+exports.list = function(failures) {
+  console.log();
+  failures.forEach(function(test, i) {
+    // format
+    var fmt =
+      color('error title', '  %s) %s:\n') +
+      color('error message', '     %s') +
+      color('error stack', '\n%s\n');
+
+    // msg
+    var msg;
+    var err = test.err;
+    var message;
+    if (err.message && typeof err.message.toString === 'function') {
+      message = err.message + '';
+    } else if (typeof err.inspect === 'function') {
+      message = err.inspect() + '';
+    } else {
+      message = '';
+    }
+    var stack = err.stack || message;
+    var index = message ? stack.indexOf(message) : -1;
+
+    if (index === -1) {
+      msg = message;
+    } else {
+      index += message.length;
+      msg = stack.slice(0, index);
+      // remove msg from stack
+      stack = stack.slice(index + 1);
+    }
+
+    // uncaught
+    if (err.uncaught) {
+      msg = 'Uncaught ' + msg;
+    }
+    // explicitly show diff
+    if (!exports.hideDiff && showDiff(err)) {
+      stringifyDiffObjs(err);
+      fmt =
+        color('error title', '  %s) %s:\n%s') + color('error stack', '\n%s\n');
+      var match = message.match(/^([^:]+): expected/);
+      msg = '\n      ' + color('error message', match ? match[1] : msg);
+
+      msg += generateDiff(err.actual, err.expected);
+    }
+
+    // indent stack trace
+    stack = stack.replace(/^/gm, '  ');
+
+    // indented test title
+    var testTitle = '';
+    test.titlePath().forEach(function(str, index) {
+      if (index !== 0) {
+        testTitle += '\n     ';
+      }
+      for (var i = 0; i < index; i++) {
+        testTitle += '  ';
+      }
+      testTitle += str;
+    });
+
+    console.log(fmt, i + 1, testTitle, msg, stack);
+  });
+};
+
+/**
+ * Initialize a new `Base` reporter.
+ *
+ * All other reporters generally
+ * inherit from this reporter.
+ *
+ * @memberof Mocha.reporters
+ * @public
+ * @class
+ * @param {Runner} runner
+ */
+
+function Base(runner) {
+  var failures = (this.failures = []);
+
+  if (!runner) {
+    throw new TypeError('Missing runner argument');
+  }
+  this.stats = runner.stats; // assigned so Reporters keep a closer reference
+  this.runner = runner;
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    if (test.duration > test.slow()) {
+      test.speed = 'slow';
+    } else if (test.duration > test.slow() / 2) {
+      test.speed = 'medium';
+    } else {
+      test.speed = 'fast';
+    }
+  });
+
+  runner.on(EVENT_TEST_FAIL, function(test, err) {
+    if (showDiff(err)) {
+      stringifyDiffObjs(err);
+    }
+    test.err = err;
+    failures.push(test);
+  });
+}
+
+/**
+ * Output common epilogue used by many of
+ * the bundled reporters.
+ *
+ * @memberof Mocha.reporters.Base
+ * @public
+ */
+Base.prototype.epilogue = function() {
+  var stats = this.stats;
+  var fmt;
+
+  console.log();
+
+  // passes
+  fmt =
+    color('bright pass', ' ') +
+    color('green', ' %d passing') +
+    color('light', ' (%s)');
+
+  console.log(fmt, stats.passes || 0, milliseconds(stats.duration));
+
+  // pending
+  if (stats.pending) {
+    fmt = color('pending', ' ') + color('pending', ' %d pending');
+
+    console.log(fmt, stats.pending);
+  }
+
+  // failures
+  if (stats.failures) {
+    fmt = color('fail', '  %d failing');
+
+    console.log(fmt, stats.failures);
+
+    Base.list(this.failures);
+    console.log();
+  }
+
+  console.log();
+};
+
+/**
+ * Pad the given `str` to `len`.
+ *
+ * @private
+ * @param {string} str
+ * @param {string} len
+ * @return {string}
+ */
+function pad(str, len) {
+  str = String(str);
+  return Array(len - str.length + 1).join(' ') + str;
+}
+
+/**
+ * Returns an inline diff between 2 strings with coloured ANSI output.
+ *
+ * @private
+ * @param {String} actual
+ * @param {String} expected
+ * @return {string} Diff
+ */
+function inlineDiff(actual, expected) {
+  var msg = errorDiff(actual, expected);
+
+  // linenos
+  var lines = msg.split('\n');
+  if (lines.length > 4) {
+    var width = String(lines.length).length;
+    msg = lines
+      .map(function(str, i) {
+        return pad(++i, width) + ' |' + ' ' + str;
+      })
+      .join('\n');
+  }
+
+  // legend
+  msg =
+    '\n' +
+    color('diff removed', 'actual') +
+    ' ' +
+    color('diff added', 'expected') +
+    '\n\n' +
+    msg +
+    '\n';
+
+  // indent
+  msg = msg.replace(/^/gm, '      ');
+  return msg;
+}
+
+/**
+ * Returns a unified diff between two strings with coloured ANSI output.
+ *
+ * @private
+ * @param {String} actual
+ * @param {String} expected
+ * @return {string} The diff.
+ */
+function unifiedDiff(actual, expected) {
+  var indent = '      ';
+  function cleanUp(line) {
+    if (line[0] === '+') {
+      return indent + colorLines('diff added', line);
+    }
+    if (line[0] === '-') {
+      return indent + colorLines('diff removed', line);
+    }
+    if (line.match(/@@/)) {
+      return '--';
+    }
+    if (line.match(/\\ No newline/)) {
+      return null;
+    }
+    return indent + line;
+  }
+  function notBlank(line) {
+    return typeof line !== 'undefined' && line !== null;
+  }
+  var msg = diff.createPatch('string', actual, expected);
+  var lines = msg.split('\n').splice(5);
+  return (
+    '\n      ' +
+    colorLines('diff added', '+ expected') +
+    ' ' +
+    colorLines('diff removed', '- actual') +
+    '\n\n' +
+    lines
+      .map(cleanUp)
+      .filter(notBlank)
+      .join('\n')
+  );
+}
+
+/**
+ * Return a character diff for `err`.
+ *
+ * @private
+ * @param {String} actual
+ * @param {String} expected
+ * @return {string} the diff
+ */
+function errorDiff(actual, expected) {
+  return diff
+    .diffWordsWithSpace(actual, expected)
+    .map(function(str) {
+      if (str.added) {
+        return colorLines('diff added', str.value);
+      }
+      if (str.removed) {
+        return colorLines('diff removed', str.value);
+      }
+      return str.value;
+    })
+    .join('');
+}
+
+/**
+ * Color lines for `str`, using the color `name`.
+ *
+ * @private
+ * @param {string} name
+ * @param {string} str
+ * @return {string}
+ */
+function colorLines(name, str) {
+  return str
+    .split('\n')
+    .map(function(str) {
+      return color(name, str);
+    })
+    .join('\n');
+}
+
+/**
+ * Object#toString reference.
+ */
+var objToString = Object.prototype.toString;
+
+/**
+ * Check that a / b have the same type.
+ *
+ * @private
+ * @param {Object} a
+ * @param {Object} b
+ * @return {boolean}
+ */
+function sameType(a, b) {
+  return objToString.call(a) === objToString.call(b);
+}
+
+Base.abstract = true;
+
+}).call(this,require('_process'))
+},{"../runner":34,"../utils":38,"_process":68,"diff":48,"ms":60,"supports-color":42,"tty":4}],18:[function(require,module,exports){
+'use strict';
+/**
+ * @module Doc
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var utils = require('../utils');
+var constants = require('../runner').constants;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_SUITE_BEGIN = constants.EVENT_SUITE_BEGIN;
+var EVENT_SUITE_END = constants.EVENT_SUITE_END;
+
+/**
+ * Expose `Doc`.
+ */
+
+exports = module.exports = Doc;
+
+/**
+ * Initialize a new `Doc` reporter.
+ *
+ * @class
+ * @memberof Mocha.reporters
+ * @extends {Base}
+ * @public
+ * @param {Runner} runner
+ */
+function Doc(runner) {
+  Base.call(this, runner);
+
+  var indents = 2;
+
+  function indent() {
+    return Array(indents).join('  ');
+  }
+
+  runner.on(EVENT_SUITE_BEGIN, function(suite) {
+    if (suite.root) {
+      return;
+    }
+    ++indents;
+    console.log('%s<section class="suite">', indent());
+    ++indents;
+    console.log('%s<h1>%s</h1>', indent(), utils.escape(suite.title));
+    console.log('%s<dl>', indent());
+  });
+
+  runner.on(EVENT_SUITE_END, function(suite) {
+    if (suite.root) {
+      return;
+    }
+    console.log('%s</dl>', indent());
+    --indents;
+    console.log('%s</section>', indent());
+    --indents;
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    console.log('%s  <dt>%s</dt>', indent(), utils.escape(test.title));
+    var code = utils.escape(utils.clean(test.body));
+    console.log('%s  <dd><pre><code>%s</code></pre></dd>', indent(), code);
+  });
+
+  runner.on(EVENT_TEST_FAIL, function(test, err) {
+    console.log(
+      '%s  <dt class="error">%s</dt>',
+      indent(),
+      utils.escape(test.title)
+    );
+    var code = utils.escape(utils.clean(test.body));
+    console.log(
+      '%s  <dd class="error"><pre><code>%s</code></pre></dd>',
+      indent(),
+      code
+    );
+    console.log('%s  <dd class="error">%s</dd>', indent(), utils.escape(err));
+  });
+}
+
+Doc.description = 'HTML documentation';
+
+},{"../runner":34,"../utils":38,"./base":17}],19:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module Dot
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var inherits = require('../utils').inherits;
+var constants = require('../runner').constants;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+
+/**
+ * Expose `Dot`.
+ */
+
+exports = module.exports = Dot;
+
+/**
+ * Initialize a new `Dot` matrix test reporter.
+ *
+ * @class
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @public
+ * @param {Runner} runner
+ */
+function Dot(runner) {
+  Base.call(this, runner);
+
+  var self = this;
+  var width = (Base.window.width * 0.75) | 0;
+  var n = -1;
+
+  runner.on(EVENT_RUN_BEGIN, function() {
+    process.stdout.write('\n');
+  });
+
+  runner.on(EVENT_TEST_PENDING, function() {
+    if (++n % width === 0) {
+      process.stdout.write('\n  ');
+    }
+    process.stdout.write(Base.color('pending', Base.symbols.comma));
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    if (++n % width === 0) {
+      process.stdout.write('\n  ');
+    }
+    if (test.speed === 'slow') {
+      process.stdout.write(Base.color('bright yellow', Base.symbols.dot));
+    } else {
+      process.stdout.write(Base.color(test.speed, Base.symbols.dot));
+    }
+  });
+
+  runner.on(EVENT_TEST_FAIL, function() {
+    if (++n % width === 0) {
+      process.stdout.write('\n  ');
+    }
+    process.stdout.write(Base.color('fail', Base.symbols.bang));
+  });
+
+  runner.once(EVENT_RUN_END, function() {
+    console.log();
+    self.epilogue();
+  });
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+inherits(Dot, Base);
+
+Dot.description = 'dot matrix representation';
+
+}).call(this,require('_process'))
+},{"../runner":34,"../utils":38,"./base":17,"_process":68}],20:[function(require,module,exports){
+(function (global){
+'use strict';
+
+/* eslint-env browser */
+/**
+ * @module HTML
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var utils = require('../utils');
+var Progress = require('../browser/progress');
+var escapeRe = require('escape-string-regexp');
+var constants = require('../runner').constants;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_SUITE_BEGIN = constants.EVENT_SUITE_BEGIN;
+var EVENT_SUITE_END = constants.EVENT_SUITE_END;
+var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
+var escape = utils.escape;
+
+/**
+ * Save timer references to avoid Sinon interfering (see GH-237).
+ */
+
+var Date = global.Date;
+
+/**
+ * Expose `HTML`.
+ */
+
+exports = module.exports = HTML;
+
+/**
+ * Stats template.
+ */
+
+var statsTemplate =
+  '<ul id="mocha-stats">' +
+  '<li class="progress"><canvas width="40" height="40"></canvas></li>' +
+  '<li class="passes"><a href="javascript:void(0);">passes:</a> <em>0</em></li>' +
+  '<li class="failures"><a href="javascript:void(0);">failures:</a> <em>0</em></li>' +
+  '<li class="duration">duration: <em>0</em>s</li>' +
+  '</ul>';
+
+var playIcon = '&#x2023;';
+
+/**
+ * Initialize a new `HTML` reporter.
+ *
+ * @public
+ * @class
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @param {Runner} runner
+ */
+function HTML(runner) {
+  Base.call(this, runner);
+
+  var self = this;
+  var stats = this.stats;
+  var stat = fragment(statsTemplate);
+  var items = stat.getElementsByTagName('li');
+  var passes = items[1].getElementsByTagName('em')[0];
+  var passesLink = items[1].getElementsByTagName('a')[0];
+  var failures = items[2].getElementsByTagName('em')[0];
+  var failuresLink = items[2].getElementsByTagName('a')[0];
+  var duration = items[3].getElementsByTagName('em')[0];
+  var canvas = stat.getElementsByTagName('canvas')[0];
+  var report = fragment('<ul id="mocha-report"></ul>');
+  var stack = [report];
+  var progress;
+  var ctx;
+  var root = document.getElementById('mocha');
+
+  if (canvas.getContext) {
+    var ratio = window.devicePixelRatio || 1;
+    canvas.style.width = canvas.width;
+    canvas.style.height = canvas.height;
+    canvas.width *= ratio;
+    canvas.height *= ratio;
+    ctx = canvas.getContext('2d');
+    ctx.scale(ratio, ratio);
+    progress = new Progress();
+  }
+
+  if (!root) {
+    return error('#mocha div missing, add it to your document');
+  }
+
+  // pass toggle
+  on(passesLink, 'click', function(evt) {
+    evt.preventDefault();
+    unhide();
+    var name = /pass/.test(report.className) ? '' : ' pass';
+    report.className = report.className.replace(/fail|pass/g, '') + name;
+    if (report.className.trim()) {
+      hideSuitesWithout('test pass');
+    }
+  });
+
+  // failure toggle
+  on(failuresLink, 'click', function(evt) {
+    evt.preventDefault();
+    unhide();
+    var name = /fail/.test(report.className) ? '' : ' fail';
+    report.className = report.className.replace(/fail|pass/g, '') + name;
+    if (report.className.trim()) {
+      hideSuitesWithout('test fail');
+    }
+  });
+
+  root.appendChild(stat);
+  root.appendChild(report);
+
+  if (progress) {
+    progress.size(40);
+  }
+
+  runner.on(EVENT_SUITE_BEGIN, function(suite) {
+    if (suite.root) {
+      return;
+    }
+
+    // suite
+    var url = self.suiteURL(suite);
+    var el = fragment(
+      '<li class="suite"><h1><a href="%s">%s</a></h1></li>',
+      url,
+      escape(suite.title)
+    );
+
+    // container
+    stack[0].appendChild(el);
+    stack.unshift(document.createElement('ul'));
+    el.appendChild(stack[0]);
+  });
+
+  runner.on(EVENT_SUITE_END, function(suite) {
+    if (suite.root) {
+      updateStats();
+      return;
+    }
+    stack.shift();
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    var url = self.testURL(test);
+    var markup =
+      '<li class="test pass %e"><h2>%e<span class="duration">%ems</span> ' +
+      '<a href="%s" class="replay">' +
+      playIcon +
+      '</a></h2></li>';
+    var el = fragment(markup, test.speed, test.title, test.duration, url);
+    self.addCodeToggle(el, test.body);
+    appendToStack(el);
+    updateStats();
+  });
+
+  runner.on(EVENT_TEST_FAIL, function(test) {
+    var el = fragment(
+      '<li class="test fail"><h2>%e <a href="%e" class="replay">' +
+        playIcon +
+        '</a></h2></li>',
+      test.title,
+      self.testURL(test)
+    );
+    var stackString; // Note: Includes leading newline
+    var message = test.err.toString();
+
+    // <=IE7 stringifies to [Object Error]. Since it can be overloaded, we
+    // check for the result of the stringifying.
+    if (message === '[object Error]') {
+      message = test.err.message;
+    }
+
+    if (test.err.stack) {
+      var indexOfMessage = test.err.stack.indexOf(test.err.message);
+      if (indexOfMessage === -1) {
+        stackString = test.err.stack;
+      } else {
+        stackString = test.err.stack.substr(
+          test.err.message.length + indexOfMessage
+        );
+      }
+    } else if (test.err.sourceURL && test.err.line !== undefined) {
+      // Safari doesn't give you a stack. Let's at least provide a source line.
+      stackString = '\n(' + test.err.sourceURL + ':' + test.err.line + ')';
+    }
+
+    stackString = stackString || '';
+
+    if (test.err.htmlMessage && stackString) {
+      el.appendChild(
+        fragment(
+          '<div class="html-error">%s\n<pre class="error">%e</pre></div>',
+          test.err.htmlMessage,
+          stackString
+        )
+      );
+    } else if (test.err.htmlMessage) {
+      el.appendChild(
+        fragment('<div class="html-error">%s</div>', test.err.htmlMessage)
+      );
+    } else {
+      el.appendChild(
+        fragment('<pre class="error">%e%e</pre>', message, stackString)
+      );
+    }
+
+    self.addCodeToggle(el, test.body);
+    appendToStack(el);
+    updateStats();
+  });
+
+  runner.on(EVENT_TEST_PENDING, function(test) {
+    var el = fragment(
+      '<li class="test pass pending"><h2>%e</h2></li>',
+      test.title
+    );
+    appendToStack(el);
+    updateStats();
+  });
+
+  function appendToStack(el) {
+    // Don't call .appendChild if #mocha-report was already .shift()'ed off the stack.
+    if (stack[0]) {
+      stack[0].appendChild(el);
+    }
+  }
+
+  function updateStats() {
+    // TODO: add to stats
+    var percent = ((stats.tests / runner.total) * 100) | 0;
+    if (progress) {
+      progress.update(percent).draw(ctx);
+    }
+
+    // update stats
+    var ms = new Date() - stats.start;
+    text(passes, stats.passes);
+    text(failures, stats.failures);
+    text(duration, (ms / 1000).toFixed(2));
+  }
+}
+
+/**
+ * Makes a URL, preserving querystring ("search") parameters.
+ *
+ * @param {string} s
+ * @return {string} A new URL.
+ */
+function makeUrl(s) {
+  var search = window.location.search;
+
+  // Remove previous grep query parameter if present
+  if (search) {
+    search = search.replace(/[?&]grep=[^&\s]*/g, '').replace(/^&/, '?');
+  }
+
+  return (
+    window.location.pathname +
+    (search ? search + '&' : '?') +
+    'grep=' +
+    encodeURIComponent(escapeRe(s))
+  );
+}
+
+/**
+ * Provide suite URL.
+ *
+ * @param {Object} [suite]
+ */
+HTML.prototype.suiteURL = function(suite) {
+  return makeUrl(suite.fullTitle());
+};
+
+/**
+ * Provide test URL.
+ *
+ * @param {Object} [test]
+ */
+HTML.prototype.testURL = function(test) {
+  return makeUrl(test.fullTitle());
+};
+
+/**
+ * Adds code toggle functionality for the provided test's list element.
+ *
+ * @param {HTMLLIElement} el
+ * @param {string} contents
+ */
+HTML.prototype.addCodeToggle = function(el, contents) {
+  var h2 = el.getElementsByTagName('h2')[0];
+
+  on(h2, 'click', function() {
+    pre.style.display = pre.style.display === 'none' ? 'block' : 'none';
+  });
+
+  var pre = fragment('<pre><code>%e</code></pre>', utils.clean(contents));
+  el.appendChild(pre);
+  pre.style.display = 'none';
+};
+
+/**
+ * Display error `msg`.
+ *
+ * @param {string} msg
+ */
+function error(msg) {
+  document.body.appendChild(fragment('<div id="mocha-error">%s</div>', msg));
+}
+
+/**
+ * Return a DOM fragment from `html`.
+ *
+ * @param {string} html
+ */
+function fragment(html) {
+  var args = arguments;
+  var div = document.createElement('div');
+  var i = 1;
+
+  div.innerHTML = html.replace(/%([se])/g, function(_, type) {
+    switch (type) {
+      case 's':
+        return String(args[i++]);
+      case 'e':
+        return escape(args[i++]);
+      // no default
+    }
+  });
+
+  return div.firstChild;
+}
+
+/**
+ * Check for suites that do not have elements
+ * with `classname`, and hide them.
+ *
+ * @param {text} classname
+ */
+function hideSuitesWithout(classname) {
+  var suites = document.getElementsByClassName('suite');
+  for (var i = 0; i < suites.length; i++) {
+    var els = suites[i].getElementsByClassName(classname);
+    if (!els.length) {
+      suites[i].className += ' hidden';
+    }
+  }
+}
+
+/**
+ * Unhide .hidden suites.
+ */
+function unhide() {
+  var els = document.getElementsByClassName('suite hidden');
+  for (var i = 0; i < els.length; ++i) {
+    els[i].className = els[i].className.replace('suite hidden', 'suite');
+  }
+}
+
+/**
+ * Set an element's text contents.
+ *
+ * @param {HTMLElement} el
+ * @param {string} contents
+ */
+function text(el, contents) {
+  if (el.textContent) {
+    el.textContent = contents;
+  } else {
+    el.innerText = contents;
+  }
+}
+
+/**
+ * Listen on `event` with callback `fn`.
+ */
+function on(el, event, fn) {
+  if (el.addEventListener) {
+    el.addEventListener(event, fn, false);
+  } else {
+    el.attachEvent('on' + event, fn);
+  }
+}
+
+HTML.browserOnly = true;
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"../browser/progress":3,"../runner":34,"../utils":38,"./base":17,"escape-string-regexp":49}],21:[function(require,module,exports){
+'use strict';
+
+// Alias exports to a their normalized format Mocha#reporter to prevent a need
+// for dynamic (try/catch) requires, which Browserify doesn't handle.
+exports.Base = exports.base = require('./base');
+exports.Dot = exports.dot = require('./dot');
+exports.Doc = exports.doc = require('./doc');
+exports.TAP = exports.tap = require('./tap');
+exports.JSON = exports.json = require('./json');
+exports.HTML = exports.html = require('./html');
+exports.List = exports.list = require('./list');
+exports.Min = exports.min = require('./min');
+exports.Spec = exports.spec = require('./spec');
+exports.Nyan = exports.nyan = require('./nyan');
+exports.XUnit = exports.xunit = require('./xunit');
+exports.Markdown = exports.markdown = require('./markdown');
+exports.Progress = exports.progress = require('./progress');
+exports.Landing = exports.landing = require('./landing');
+exports.JSONStream = exports['json-stream'] = require('./json-stream');
+
+},{"./base":17,"./doc":18,"./dot":19,"./html":20,"./json":23,"./json-stream":22,"./landing":24,"./list":25,"./markdown":26,"./min":27,"./nyan":28,"./progress":29,"./spec":30,"./tap":31,"./xunit":32}],22:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module JSONStream
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var constants = require('../runner').constants;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+
+/**
+ * Expose `JSONStream`.
+ */
+
+exports = module.exports = JSONStream;
+
+/**
+ * Constructs a new `JSONStream` reporter instance.
+ *
+ * @public
+ * @class
+ * @extends Mocha.reporters.Base
+ * @memberof Mocha.reporters
+ * @param {Runner} runner - Instance triggers reporter actions.
+ */
+function JSONStream(runner) {
+  Base.call(this, runner);
+
+  var self = this;
+  var total = runner.total;
+
+  runner.once(EVENT_RUN_BEGIN, function() {
+    writeEvent(['start', {total: total}]);
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    writeEvent(['pass', clean(test)]);
+  });
+
+  runner.on(EVENT_TEST_FAIL, function(test, err) {
+    test = clean(test);
+    test.err = err.message;
+    test.stack = err.stack || null;
+    writeEvent(['fail', test]);
+  });
+
+  runner.once(EVENT_RUN_END, function() {
+    writeEvent(['end', self.stats]);
+  });
+}
+
+/**
+ * Mocha event to be written to the output stream.
+ * @typedef {Array} JSONStream~MochaEvent
+ */
+
+/**
+ * Writes Mocha event to reporter output stream.
+ *
+ * @private
+ * @param {JSONStream~MochaEvent} event - Mocha event to be output.
+ */
+function writeEvent(event) {
+  process.stdout.write(JSON.stringify(event) + '\n');
+}
+
+/**
+ * Returns an object literal representation of `test`
+ * free of cyclic properties, etc.
+ *
+ * @private
+ * @param {Test} test - Instance used as data source.
+ * @return {Object} object containing pared-down test instance data
+ */
+function clean(test) {
+  return {
+    title: test.title,
+    fullTitle: test.fullTitle(),
+    duration: test.duration,
+    currentRetry: test.currentRetry()
+  };
+}
+
+JSONStream.description = 'newline delimited JSON events';
+
+}).call(this,require('_process'))
+},{"../runner":34,"./base":17,"_process":68}],23:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module JSON
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var constants = require('../runner').constants;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_TEST_END = constants.EVENT_TEST_END;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
+
+/**
+ * Expose `JSON`.
+ */
+
+exports = module.exports = JSONReporter;
+
+/**
+ * Initialize a new `JSON` reporter.
+ *
+ * @public
+ * @class JSON
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @param {Runner} runner
+ */
+function JSONReporter(runner) {
+  Base.call(this, runner);
+
+  var self = this;
+  var tests = [];
+  var pending = [];
+  var failures = [];
+  var passes = [];
+
+  runner.on(EVENT_TEST_END, function(test) {
+    tests.push(test);
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    passes.push(test);
+  });
+
+  runner.on(EVENT_TEST_FAIL, function(test) {
+    failures.push(test);
+  });
+
+  runner.on(EVENT_TEST_PENDING, function(test) {
+    pending.push(test);
+  });
+
+  runner.once(EVENT_RUN_END, function() {
+    var obj = {
+      stats: self.stats,
+      tests: tests.map(clean),
+      pending: pending.map(clean),
+      failures: failures.map(clean),
+      passes: passes.map(clean)
+    };
+
+    runner.testResults = obj;
+
+    process.stdout.write(JSON.stringify(obj, null, 2));
+  });
+}
+
+/**
+ * Return a plain-object representation of `test`
+ * free of cyclic properties etc.
+ *
+ * @private
+ * @param {Object} test
+ * @return {Object}
+ */
+function clean(test) {
+  var err = test.err || {};
+  if (err instanceof Error) {
+    err = errorJSON(err);
+  }
+
+  return {
+    title: test.title,
+    fullTitle: test.fullTitle(),
+    duration: test.duration,
+    currentRetry: test.currentRetry(),
+    err: cleanCycles(err)
+  };
+}
+
+/**
+ * Replaces any circular references inside `obj` with '[object Object]'
+ *
+ * @private
+ * @param {Object} obj
+ * @return {Object}
+ */
+function cleanCycles(obj) {
+  var cache = [];
+  return JSON.parse(
+    JSON.stringify(obj, function(key, value) {
+      if (typeof value === 'object' && value !== null) {
+        if (cache.indexOf(value) !== -1) {
+          // Instead of going in a circle, we'll print [object Object]
+          return '' + value;
+        }
+        cache.push(value);
+      }
+
+      return value;
+    })
+  );
+}
+
+/**
+ * Transform an Error object into a JSON object.
+ *
+ * @private
+ * @param {Error} err
+ * @return {Object}
+ */
+function errorJSON(err) {
+  var res = {};
+  Object.getOwnPropertyNames(err).forEach(function(key) {
+    res[key] = err[key];
+  }, err);
+  return res;
+}
+
+JSONReporter.description = 'single JSON object';
+
+}).call(this,require('_process'))
+},{"../runner":34,"./base":17,"_process":68}],24:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module Landing
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var inherits = require('../utils').inherits;
+var constants = require('../runner').constants;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_TEST_END = constants.EVENT_TEST_END;
+var STATE_FAILED = require('../runnable').constants.STATE_FAILED;
+
+var cursor = Base.cursor;
+var color = Base.color;
+
+/**
+ * Expose `Landing`.
+ */
+
+exports = module.exports = Landing;
+
+/**
+ * Airplane color.
+ */
+
+Base.colors.plane = 0;
+
+/**
+ * Airplane crash color.
+ */
+
+Base.colors['plane crash'] = 31;
+
+/**
+ * Runway color.
+ */
+
+Base.colors.runway = 90;
+
+/**
+ * Initialize a new `Landing` reporter.
+ *
+ * @public
+ * @class
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @param {Runner} runner
+ */
+function Landing(runner) {
+  Base.call(this, runner);
+
+  var self = this;
+  var width = (Base.window.width * 0.75) | 0;
+  var total = runner.total;
+  var stream = process.stdout;
+  var plane = color('plane', '✈');
+  var crashed = -1;
+  var n = 0;
+
+  function runway() {
+    var buf = Array(width).join('-');
+    return '  ' + color('runway', buf);
+  }
+
+  runner.on(EVENT_RUN_BEGIN, function() {
+    stream.write('\n\n\n  ');
+    cursor.hide();
+  });
+
+  runner.on(EVENT_TEST_END, function(test) {
+    // check if the plane crashed
+    var col = crashed === -1 ? ((width * ++n) / total) | 0 : crashed;
+
+    // show the crash
+    if (test.state === STATE_FAILED) {
+      plane = color('plane crash', '✈');
+      crashed = col;
+    }
+
+    // render landing strip
+    stream.write('\u001b[' + (width + 1) + 'D\u001b[2A');
+    stream.write(runway());
+    stream.write('\n  ');
+    stream.write(color('runway', Array(col).join('⋅')));
+    stream.write(plane);
+    stream.write(color('runway', Array(width - col).join('⋅') + '\n'));
+    stream.write(runway());
+    stream.write('\u001b[0m');
+  });
+
+  runner.once(EVENT_RUN_END, function() {
+    cursor.show();
+    console.log();
+    self.epilogue();
+  });
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+inherits(Landing, Base);
+
+Landing.description = 'Unicode landing strip';
+
+}).call(this,require('_process'))
+},{"../runnable":33,"../runner":34,"../utils":38,"./base":17,"_process":68}],25:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module List
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var inherits = require('../utils').inherits;
+var constants = require('../runner').constants;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_TEST_BEGIN = constants.EVENT_TEST_BEGIN;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
+var color = Base.color;
+var cursor = Base.cursor;
+
+/**
+ * Expose `List`.
+ */
+
+exports = module.exports = List;
+
+/**
+ * Initialize a new `List` test reporter.
+ *
+ * @public
+ * @class
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @param {Runner} runner
+ */
+function List(runner) {
+  Base.call(this, runner);
+
+  var self = this;
+  var n = 0;
+
+  runner.on(EVENT_RUN_BEGIN, function() {
+    console.log();
+  });
+
+  runner.on(EVENT_TEST_BEGIN, function(test) {
+    process.stdout.write(color('pass', '    ' + test.fullTitle() + ': '));
+  });
+
+  runner.on(EVENT_TEST_PENDING, function(test) {
+    var fmt = color('checkmark', '  -') + color('pending', ' %s');
+    console.log(fmt, test.fullTitle());
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    var fmt =
+      color('checkmark', '  ' + Base.symbols.ok) +
+      color('pass', ' %s: ') +
+      color(test.speed, '%dms');
+    cursor.CR();
+    console.log(fmt, test.fullTitle(), test.duration);
+  });
+
+  runner.on(EVENT_TEST_FAIL, function(test) {
+    cursor.CR();
+    console.log(color('fail', '  %d) %s'), ++n, test.fullTitle());
+  });
+
+  runner.once(EVENT_RUN_END, self.epilogue.bind(self));
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+inherits(List, Base);
+
+List.description = 'like "spec" reporter but flat';
+
+}).call(this,require('_process'))
+},{"../runner":34,"../utils":38,"./base":17,"_process":68}],26:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module Markdown
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var utils = require('../utils');
+var constants = require('../runner').constants;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_SUITE_BEGIN = constants.EVENT_SUITE_BEGIN;
+var EVENT_SUITE_END = constants.EVENT_SUITE_END;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+
+/**
+ * Constants
+ */
+
+var SUITE_PREFIX = '$';
+
+/**
+ * Expose `Markdown`.
+ */
+
+exports = module.exports = Markdown;
+
+/**
+ * Initialize a new `Markdown` reporter.
+ *
+ * @public
+ * @class
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @param {Runner} runner
+ */
+function Markdown(runner) {
+  Base.call(this, runner);
+
+  var level = 0;
+  var buf = '';
+
+  function title(str) {
+    return Array(level).join('#') + ' ' + str;
+  }
+
+  function mapTOC(suite, obj) {
+    var ret = obj;
+    var key = SUITE_PREFIX + suite.title;
+
+    obj = obj[key] = obj[key] || {suite: suite};
+    suite.suites.forEach(function(suite) {
+      mapTOC(suite, obj);
+    });
+
+    return ret;
+  }
+
+  function stringifyTOC(obj, level) {
+    ++level;
+    var buf = '';
+    var link;
+    for (var key in obj) {
+      if (key === 'suite') {
+        continue;
+      }
+      if (key !== SUITE_PREFIX) {
+        link = ' - [' + key.substring(1) + ']';
+        link += '(#' + utils.slug(obj[key].suite.fullTitle()) + ')\n';
+        buf += Array(level).join('  ') + link;
+      }
+      buf += stringifyTOC(obj[key], level);
+    }
+    return buf;
+  }
+
+  function generateTOC(suite) {
+    var obj = mapTOC(suite, {});
+    return stringifyTOC(obj, 0);
+  }
+
+  generateTOC(runner.suite);
+
+  runner.on(EVENT_SUITE_BEGIN, function(suite) {
+    ++level;
+    var slug = utils.slug(suite.fullTitle());
+    buf += '<a name="' + slug + '"></a>' + '\n';
+    buf += title(suite.title) + '\n';
+  });
+
+  runner.on(EVENT_SUITE_END, function() {
+    --level;
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    var code = utils.clean(test.body);
+    buf += test.title + '.\n';
+    buf += '\n```js\n';
+    buf += code + '\n';
+    buf += '```\n\n';
+  });
+
+  runner.once(EVENT_RUN_END, function() {
+    process.stdout.write('# TOC\n');
+    process.stdout.write(generateTOC(runner.suite));
+    process.stdout.write(buf);
+  });
+}
+
+Markdown.description = 'GitHub Flavored Markdown';
+
+}).call(this,require('_process'))
+},{"../runner":34,"../utils":38,"./base":17,"_process":68}],27:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module Min
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var inherits = require('../utils').inherits;
+var constants = require('../runner').constants;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+
+/**
+ * Expose `Min`.
+ */
+
+exports = module.exports = Min;
+
+/**
+ * Initialize a new `Min` minimal test reporter (best used with --watch).
+ *
+ * @public
+ * @class
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @param {Runner} runner
+ */
+function Min(runner) {
+  Base.call(this, runner);
+
+  runner.on(EVENT_RUN_BEGIN, function() {
+    // clear screen
+    process.stdout.write('\u001b[2J');
+    // set cursor position
+    process.stdout.write('\u001b[1;3H');
+  });
+
+  runner.once(EVENT_RUN_END, this.epilogue.bind(this));
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+inherits(Min, Base);
+
+Min.description = 'essentially just a summary';
+
+}).call(this,require('_process'))
+},{"../runner":34,"../utils":38,"./base":17,"_process":68}],28:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module Nyan
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var constants = require('../runner').constants;
+var inherits = require('../utils').inherits;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+
+/**
+ * Expose `Dot`.
+ */
+
+exports = module.exports = NyanCat;
+
+/**
+ * Initialize a new `Dot` matrix test reporter.
+ *
+ * @param {Runner} runner
+ * @public
+ * @class Nyan
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ */
+
+function NyanCat(runner) {
+  Base.call(this, runner);
+
+  var self = this;
+  var width = (Base.window.width * 0.75) | 0;
+  var nyanCatWidth = (this.nyanCatWidth = 11);
+
+  this.colorIndex = 0;
+  this.numberOfLines = 4;
+  this.rainbowColors = self.generateColors();
+  this.scoreboardWidth = 5;
+  this.tick = 0;
+  this.trajectories = [[], [], [], []];
+  this.trajectoryWidthMax = width - nyanCatWidth;
+
+  runner.on(EVENT_RUN_BEGIN, function() {
+    Base.cursor.hide();
+    self.draw();
+  });
+
+  runner.on(EVENT_TEST_PENDING, function() {
+    self.draw();
+  });
+
+  runner.on(EVENT_TEST_PASS, function() {
+    self.draw();
+  });
+
+  runner.on(EVENT_TEST_FAIL, function() {
+    self.draw();
+  });
+
+  runner.once(EVENT_RUN_END, function() {
+    Base.cursor.show();
+    for (var i = 0; i < self.numberOfLines; i++) {
+      write('\n');
+    }
+    self.epilogue();
+  });
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+inherits(NyanCat, Base);
+
+/**
+ * Draw the nyan cat
+ *
+ * @private
+ */
+
+NyanCat.prototype.draw = function() {
+  this.appendRainbow();
+  this.drawScoreboard();
+  this.drawRainbow();
+  this.drawNyanCat();
+  this.tick = !this.tick;
+};
+
+/**
+ * Draw the "scoreboard" showing the number
+ * of passes, failures and pending tests.
+ *
+ * @private
+ */
+
+NyanCat.prototype.drawScoreboard = function() {
+  var stats = this.stats;
+
+  function draw(type, n) {
+    write(' ');
+    write(Base.color(type, n));
+    write('\n');
+  }
+
+  draw('green', stats.passes);
+  draw('fail', stats.failures);
+  draw('pending', stats.pending);
+  write('\n');
+
+  this.cursorUp(this.numberOfLines);
+};
+
+/**
+ * Append the rainbow.
+ *
+ * @private
+ */
+
+NyanCat.prototype.appendRainbow = function() {
+  var segment = this.tick ? '_' : '-';
+  var rainbowified = this.rainbowify(segment);
+
+  for (var index = 0; index < this.numberOfLines; index++) {
+    var trajectory = this.trajectories[index];
+    if (trajectory.length >= this.trajectoryWidthMax) {
+      trajectory.shift();
+    }
+    trajectory.push(rainbowified);
+  }
+};
+
+/**
+ * Draw the rainbow.
+ *
+ * @private
+ */
+
+NyanCat.prototype.drawRainbow = function() {
+  var self = this;
+
+  this.trajectories.forEach(function(line) {
+    write('\u001b[' + self.scoreboardWidth + 'C');
+    write(line.join(''));
+    write('\n');
+  });
+
+  this.cursorUp(this.numberOfLines);
+};
+
+/**
+ * Draw the nyan cat
+ *
+ * @private
+ */
+NyanCat.prototype.drawNyanCat = function() {
+  var self = this;
+  var startWidth = this.scoreboardWidth + this.trajectories[0].length;
+  var dist = '\u001b[' + startWidth + 'C';
+  var padding = '';
+
+  write(dist);
+  write('_,------,');
+  write('\n');
+
+  write(dist);
+  padding = self.tick ? '  ' : '   ';
+  write('_|' + padding + '/\\_/\\ ');
+  write('\n');
+
+  write(dist);
+  padding = self.tick ? '_' : '__';
+  var tail = self.tick ? '~' : '^';
+  write(tail + '|' + padding + this.face() + ' ');
+  write('\n');
+
+  write(dist);
+  padding = self.tick ? ' ' : '  ';
+  write(padding + '""  "" ');
+  write('\n');
+
+  this.cursorUp(this.numberOfLines);
+};
+
+/**
+ * Draw nyan cat face.
+ *
+ * @private
+ * @return {string}
+ */
+
+NyanCat.prototype.face = function() {
+  var stats = this.stats;
+  if (stats.failures) {
+    return '( x .x)';
+  } else if (stats.pending) {
+    return '( o .o)';
+  } else if (stats.passes) {
+    return '( ^ .^)';
+  }
+  return '( - .-)';
+};
+
+/**
+ * Move cursor up `n`.
+ *
+ * @private
+ * @param {number} n
+ */
+
+NyanCat.prototype.cursorUp = function(n) {
+  write('\u001b[' + n + 'A');
+};
+
+/**
+ * Move cursor down `n`.
+ *
+ * @private
+ * @param {number} n
+ */
+
+NyanCat.prototype.cursorDown = function(n) {
+  write('\u001b[' + n + 'B');
+};
+
+/**
+ * Generate rainbow colors.
+ *
+ * @private
+ * @return {Array}
+ */
+NyanCat.prototype.generateColors = function() {
+  var colors = [];
+
+  for (var i = 0; i < 6 * 7; i++) {
+    var pi3 = Math.floor(Math.PI / 3);
+    var n = i * (1.0 / 6);
+    var r = Math.floor(3 * Math.sin(n) + 3);
+    var g = Math.floor(3 * Math.sin(n + 2 * pi3) + 3);
+    var b = Math.floor(3 * Math.sin(n + 4 * pi3) + 3);
+    colors.push(36 * r + 6 * g + b + 16);
+  }
+
+  return colors;
+};
+
+/**
+ * Apply rainbow to the given `str`.
+ *
+ * @private
+ * @param {string} str
+ * @return {string}
+ */
+NyanCat.prototype.rainbowify = function(str) {
+  if (!Base.useColors) {
+    return str;
+  }
+  var color = this.rainbowColors[this.colorIndex % this.rainbowColors.length];
+  this.colorIndex += 1;
+  return '\u001b[38;5;' + color + 'm' + str + '\u001b[0m';
+};
+
+/**
+ * Stdout helper.
+ *
+ * @param {string} string A message to write to stdout.
+ */
+function write(string) {
+  process.stdout.write(string);
+}
+
+NyanCat.description = '"nyan cat"';
+
+}).call(this,require('_process'))
+},{"../runner":34,"../utils":38,"./base":17,"_process":68}],29:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module Progress
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var constants = require('../runner').constants;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+var EVENT_TEST_END = constants.EVENT_TEST_END;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var inherits = require('../utils').inherits;
+var color = Base.color;
+var cursor = Base.cursor;
+
+/**
+ * Expose `Progress`.
+ */
+
+exports = module.exports = Progress;
+
+/**
+ * General progress bar color.
+ */
+
+Base.colors.progress = 90;
+
+/**
+ * Initialize a new `Progress` bar test reporter.
+ *
+ * @public
+ * @class
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @param {Runner} runner
+ * @param {Object} options
+ */
+function Progress(runner, options) {
+  Base.call(this, runner);
+
+  var self = this;
+  var width = (Base.window.width * 0.5) | 0;
+  var total = runner.total;
+  var complete = 0;
+  var lastN = -1;
+
+  // default chars
+  options = options || {};
+  var reporterOptions = options.reporterOptions || {};
+
+  options.open = reporterOptions.open || '[';
+  options.complete = reporterOptions.complete || '▬';
+  options.incomplete = reporterOptions.incomplete || Base.symbols.dot;
+  options.close = reporterOptions.close || ']';
+  options.verbose = reporterOptions.verbose || false;
+
+  // tests started
+  runner.on(EVENT_RUN_BEGIN, function() {
+    console.log();
+    cursor.hide();
+  });
+
+  // tests complete
+  runner.on(EVENT_TEST_END, function() {
+    complete++;
+
+    var percent = complete / total;
+    var n = (width * percent) | 0;
+    var i = width - n;
+
+    if (n === lastN && !options.verbose) {
+      // Don't re-render the line if it hasn't changed
+      return;
+    }
+    lastN = n;
+
+    cursor.CR();
+    process.stdout.write('\u001b[J');
+    process.stdout.write(color('progress', '  ' + options.open));
+    process.stdout.write(Array(n).join(options.complete));
+    process.stdout.write(Array(i).join(options.incomplete));
+    process.stdout.write(color('progress', options.close));
+    if (options.verbose) {
+      process.stdout.write(color('progress', ' ' + complete + ' of ' + total));
+    }
+  });
+
+  // tests are complete, output some stats
+  // and the failures if any
+  runner.once(EVENT_RUN_END, function() {
+    cursor.show();
+    console.log();
+    self.epilogue();
+  });
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+inherits(Progress, Base);
+
+Progress.description = 'a progress bar';
+
+}).call(this,require('_process'))
+},{"../runner":34,"../utils":38,"./base":17,"_process":68}],30:[function(require,module,exports){
+'use strict';
+/**
+ * @module Spec
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var constants = require('../runner').constants;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_SUITE_BEGIN = constants.EVENT_SUITE_BEGIN;
+var EVENT_SUITE_END = constants.EVENT_SUITE_END;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
+var inherits = require('../utils').inherits;
+var color = Base.color;
+
+/**
+ * Expose `Spec`.
+ */
+
+exports = module.exports = Spec;
+
+/**
+ * Initialize a new `Spec` test reporter.
+ *
+ * @public
+ * @class
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @param {Runner} runner
+ */
+function Spec(runner) {
+  Base.call(this, runner);
+
+  var self = this;
+  var indents = 0;
+  var n = 0;
+
+  function indent() {
+    return Array(indents).join('  ');
+  }
+
+  runner.on(EVENT_RUN_BEGIN, function() {
+    console.log();
+  });
+
+  runner.on(EVENT_SUITE_BEGIN, function(suite) {
+    ++indents;
+    console.log(color('suite', '%s%s'), indent(), suite.title);
+  });
+
+  runner.on(EVENT_SUITE_END, function() {
+    --indents;
+    if (indents === 1) {
+      console.log();
+    }
+  });
+
+  runner.on(EVENT_TEST_PENDING, function(test) {
+    var fmt = indent() + color('pending', '  - %s');
+    console.log(fmt, test.title);
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    var fmt;
+    if (test.speed === 'fast') {
+      fmt =
+        indent() +
+        color('checkmark', '  ' + Base.symbols.ok) +
+        color('pass', ' %s');
+      console.log(fmt, test.title);
+    } else {
+      fmt =
+        indent() +
+        color('checkmark', '  ' + Base.symbols.ok) +
+        color('pass', ' %s') +
+        color(test.speed, ' (%dms)');
+      console.log(fmt, test.title, test.duration);
+    }
+  });
+
+  runner.on(EVENT_TEST_FAIL, function(test) {
+    console.log(indent() + color('fail', '  %d) %s'), ++n, test.title);
+  });
+
+  runner.once(EVENT_RUN_END, self.epilogue.bind(self));
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+inherits(Spec, Base);
+
+Spec.description = 'hierarchical & verbose [default]';
+
+},{"../runner":34,"../utils":38,"./base":17}],31:[function(require,module,exports){
+(function (process){
+'use strict';
+/**
+ * @module TAP
+ */
+/**
+ * Module dependencies.
+ */
+
+var util = require('util');
+var Base = require('./base');
+var constants = require('../runner').constants;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
+var EVENT_TEST_END = constants.EVENT_TEST_END;
+var inherits = require('../utils').inherits;
+var sprintf = util.format;
+
+/**
+ * Expose `TAP`.
+ */
+
+exports = module.exports = TAP;
+
+/**
+ * Constructs a new TAP reporter with runner instance and reporter options.
+ *
+ * @public
+ * @class
+ * @extends Mocha.reporters.Base
+ * @memberof Mocha.reporters
+ * @param {Runner} runner - Instance triggers reporter actions.
+ * @param {Object} [options] - runner options
+ */
+function TAP(runner, options) {
+  Base.call(this, runner, options);
+
+  var self = this;
+  var n = 1;
+
+  var tapVersion = '12';
+  if (options && options.reporterOptions) {
+    if (options.reporterOptions.tapVersion) {
+      tapVersion = options.reporterOptions.tapVersion.toString();
+    }
+  }
+
+  this._producer = createProducer(tapVersion);
+
+  runner.once(EVENT_RUN_BEGIN, function() {
+    var ntests = runner.grepTotal(runner.suite);
+    self._producer.writeVersion();
+    self._producer.writePlan(ntests);
+  });
+
+  runner.on(EVENT_TEST_END, function() {
+    ++n;
+  });
+
+  runner.on(EVENT_TEST_PENDING, function(test) {
+    self._producer.writePending(n, test);
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    self._producer.writePass(n, test);
+  });
+
+  runner.on(EVENT_TEST_FAIL, function(test, err) {
+    self._producer.writeFail(n, test, err);
+  });
+
+  runner.once(EVENT_RUN_END, function() {
+    self._producer.writeEpilogue(runner.stats);
+  });
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+inherits(TAP, Base);
+
+/**
+ * Returns a TAP-safe title of `test`.
+ *
+ * @private
+ * @param {Test} test - Test instance.
+ * @return {String} title with any hash character removed
+ */
+function title(test) {
+  return test.fullTitle().replace(/#/g, '');
+}
+
+/**
+ * Writes newline-terminated formatted string to reporter output stream.
+ *
+ * @private
+ * @param {string} format - `printf`-like format string
+ * @param {...*} [varArgs] - Format string arguments
+ */
+function println(format, varArgs) {
+  var vargs = Array.from(arguments);
+  vargs[0] += '\n';
+  process.stdout.write(sprintf.apply(null, vargs));
+}
+
+/**
+ * Returns a `tapVersion`-appropriate TAP producer instance, if possible.
+ *
+ * @private
+ * @param {string} tapVersion - Version of TAP specification to produce.
+ * @returns {TAPProducer} specification-appropriate instance
+ * @throws {Error} if specification version has no associated producer.
+ */
+function createProducer(tapVersion) {
+  var producers = {
+    '12': new TAP12Producer(),
+    '13': new TAP13Producer()
+  };
+  var producer = producers[tapVersion];
+
+  if (!producer) {
+    throw new Error(
+      'invalid or unsupported TAP version: ' + JSON.stringify(tapVersion)
+    );
+  }
+
+  return producer;
+}
+
+/**
+ * @summary
+ * Constructs a new TAPProducer.
+ *
+ * @description
+ * <em>Only</em> to be used as an abstract base class.
+ *
+ * @private
+ * @constructor
+ */
+function TAPProducer() {}
+
+/**
+ * Writes the TAP version to reporter output stream.
+ *
+ * @abstract
+ */
+TAPProducer.prototype.writeVersion = function() {};
+
+/**
+ * Writes the plan to reporter output stream.
+ *
+ * @abstract
+ * @param {number} ntests - Number of tests that are planned to run.
+ */
+TAPProducer.prototype.writePlan = function(ntests) {
+  println('%d..%d', 1, ntests);
+};
+
+/**
+ * Writes that test passed to reporter output stream.
+ *
+ * @abstract
+ * @param {number} n - Index of test that passed.
+ * @param {Test} test - Instance containing test information.
+ */
+TAPProducer.prototype.writePass = function(n, test) {
+  println('ok %d %s', n, title(test));
+};
+
+/**
+ * Writes that test was skipped to reporter output stream.
+ *
+ * @abstract
+ * @param {number} n - Index of test that was skipped.
+ * @param {Test} test - Instance containing test information.
+ */
+TAPProducer.prototype.writePending = function(n, test) {
+  println('ok %d %s # SKIP -', n, title(test));
+};
+
+/**
+ * Writes that test failed to reporter output stream.
+ *
+ * @abstract
+ * @param {number} n - Index of test that failed.
+ * @param {Test} test - Instance containing test information.
+ * @param {Error} err - Reason the test failed.
+ */
+TAPProducer.prototype.writeFail = function(n, test, err) {
+  println('not ok %d %s', n, title(test));
+};
+
+/**
+ * Writes the summary epilogue to reporter output stream.
+ *
+ * @abstract
+ * @param {Object} stats - Object containing run statistics.
+ */
+TAPProducer.prototype.writeEpilogue = function(stats) {
+  // :TBD: Why is this not counting pending tests?
+  println('# tests ' + (stats.passes + stats.failures));
+  println('# pass ' + stats.passes);
+  // :TBD: Why are we not showing pending results?
+  println('# fail ' + stats.failures);
+};
+
+/**
+ * @summary
+ * Constructs a new TAP12Producer.
+ *
+ * @description
+ * Produces output conforming to the TAP12 specification.
+ *
+ * @private
+ * @constructor
+ * @extends TAPProducer
+ * @see {@link https://testanything.org/tap-specification.html|Specification}
+ */
+function TAP12Producer() {
+  /**
+   * Writes that test failed to reporter output stream, with error formatting.
+   * @override
+   */
+  this.writeFail = function(n, test, err) {
+    TAPProducer.prototype.writeFail.call(this, n, test, err);
+    if (err.message) {
+      println(err.message.replace(/^/gm, '  '));
+    }
+    if (err.stack) {
+      println(err.stack.replace(/^/gm, '  '));
+    }
+  };
+}
+
+/**
+ * Inherit from `TAPProducer.prototype`.
+ */
+inherits(TAP12Producer, TAPProducer);
+
+/**
+ * @summary
+ * Constructs a new TAP13Producer.
+ *
+ * @description
+ * Produces output conforming to the TAP13 specification.
+ *
+ * @private
+ * @constructor
+ * @extends TAPProducer
+ * @see {@link https://testanything.org/tap-version-13-specification.html|Specification}
+ */
+function TAP13Producer() {
+  /**
+   * Writes the TAP version to reporter output stream.
+   * @override
+   */
+  this.writeVersion = function() {
+    println('TAP version 13');
+  };
+
+  /**
+   * Writes that test failed to reporter output stream, with error formatting.
+   * @override
+   */
+  this.writeFail = function(n, test, err) {
+    TAPProducer.prototype.writeFail.call(this, n, test, err);
+    var emitYamlBlock = err.message != null || err.stack != null;
+    if (emitYamlBlock) {
+      println(indent(1) + '---');
+      if (err.message) {
+        println(indent(2) + 'message: |-');
+        println(err.message.replace(/^/gm, indent(3)));
+      }
+      if (err.stack) {
+        println(indent(2) + 'stack: |-');
+        println(err.stack.replace(/^/gm, indent(3)));
+      }
+      println(indent(1) + '...');
+    }
+  };
+
+  function indent(level) {
+    return Array(level + 1).join('  ');
+  }
+}
+
+/**
+ * Inherit from `TAPProducer.prototype`.
+ */
+inherits(TAP13Producer, TAPProducer);
+
+TAP.description = 'TAP-compatible output';
+
+}).call(this,require('_process'))
+},{"../runner":34,"../utils":38,"./base":17,"_process":68,"util":88}],32:[function(require,module,exports){
+(function (process,global){
+'use strict';
+/**
+ * @module XUnit
+ */
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./base');
+var utils = require('../utils');
+var fs = require('fs');
+var mkdirp = require('mkdirp');
+var path = require('path');
+var errors = require('../errors');
+var createUnsupportedError = errors.createUnsupportedError;
+var constants = require('../runner').constants;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
+var STATE_FAILED = require('../runnable').constants.STATE_FAILED;
+var inherits = utils.inherits;
+var escape = utils.escape;
+
+/**
+ * Save timer references to avoid Sinon interfering (see GH-237).
+ */
+var Date = global.Date;
+
+/**
+ * Expose `XUnit`.
+ */
+
+exports = module.exports = XUnit;
+
+/**
+ * Initialize a new `XUnit` reporter.
+ *
+ * @public
+ * @class
+ * @memberof Mocha.reporters
+ * @extends Mocha.reporters.Base
+ * @param {Runner} runner
+ */
+function XUnit(runner, options) {
+  Base.call(this, runner);
+
+  var stats = this.stats;
+  var tests = [];
+  var self = this;
+
+  // the name of the test suite, as it will appear in the resulting XML file
+  var suiteName;
+
+  // the default name of the test suite if none is provided
+  var DEFAULT_SUITE_NAME = 'Mocha Tests';
+
+  if (options && options.reporterOptions) {
+    if (options.reporterOptions.output) {
+      if (!fs.createWriteStream) {
+        throw createUnsupportedError('file output not supported in browser');
+      }
+
+      mkdirp.sync(path.dirname(options.reporterOptions.output));
+      self.fileStream = fs.createWriteStream(options.reporterOptions.output);
+    }
+
+    // get the suite name from the reporter options (if provided)
+    suiteName = options.reporterOptions.suiteName;
+  }
+
+  // fall back to the default suite name
+  suiteName = suiteName || DEFAULT_SUITE_NAME;
+
+  runner.on(EVENT_TEST_PENDING, function(test) {
+    tests.push(test);
+  });
+
+  runner.on(EVENT_TEST_PASS, function(test) {
+    tests.push(test);
+  });
+
+  runner.on(EVENT_TEST_FAIL, function(test) {
+    tests.push(test);
+  });
+
+  runner.once(EVENT_RUN_END, function() {
+    self.write(
+      tag(
+        'testsuite',
+        {
+          name: suiteName,
+          tests: stats.tests,
+          failures: 0,
+          errors: stats.failures,
+          skipped: stats.tests - stats.failures - stats.passes,
+          timestamp: new Date().toUTCString(),
+          time: stats.duration / 1000 || 0
+        },
+        false
+      )
+    );
+
+    tests.forEach(function(t) {
+      self.test(t);
+    });
+
+    self.write('</testsuite>');
+  });
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+inherits(XUnit, Base);
+
+/**
+ * Override done to close the stream (if it's a file).
+ *
+ * @param failures
+ * @param {Function} fn
+ */
+XUnit.prototype.done = function(failures, fn) {
+  if (this.fileStream) {
+    this.fileStream.end(function() {
+      fn(failures);
+    });
+  } else {
+    fn(failures);
+  }
+};
+
+/**
+ * Write out the given line.
+ *
+ * @param {string} line
+ */
+XUnit.prototype.write = function(line) {
+  if (this.fileStream) {
+    this.fileStream.write(line + '\n');
+  } else if (typeof process === 'object' && process.stdout) {
+    process.stdout.write(line + '\n');
+  } else {
+    console.log(line);
+  }
+};
+
+/**
+ * Output tag for the given `test.`
+ *
+ * @param {Test} test
+ */
+XUnit.prototype.test = function(test) {
+  Base.useColors = false;
+
+  var attrs = {
+    classname: test.parent.fullTitle(),
+    name: test.title,
+    time: test.duration / 1000 || 0
+  };
+
+  if (test.state === STATE_FAILED) {
+    var err = test.err;
+    var diff =
+      Base.hideDiff || !err.actual || !err.expected
+        ? ''
+        : '\n' + Base.generateDiff(err.actual, err.expected);
+    this.write(
+      tag(
+        'testcase',
+        attrs,
+        false,
+        tag(
+          'failure',
+          {},
+          false,
+          escape(err.message) + escape(diff) + '\n' + escape(err.stack)
+        )
+      )
+    );
+  } else if (test.isPending()) {
+    this.write(tag('testcase', attrs, false, tag('skipped', {}, true)));
+  } else {
+    this.write(tag('testcase', attrs, true));
+  }
+};
+
+/**
+ * HTML tag helper.
+ *
+ * @param name
+ * @param attrs
+ * @param close
+ * @param content
+ * @return {string}
+ */
+function tag(name, attrs, close, content) {
+  var end = close ? '/>' : '>';
+  var pairs = [];
+  var tag;
+
+  for (var key in attrs) {
+    if (Object.prototype.hasOwnProperty.call(attrs, key)) {
+      pairs.push(key + '="' + escape(attrs[key]) + '"');
+    }
+  }
+
+  tag = '<' + name + (pairs.length ? ' ' + pairs.join(' ') : '') + end;
+  if (content) {
+    tag += content + '</' + name + end;
+  }
+  return tag;
+}
+
+XUnit.description = 'XUnit-compatible XML output';
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"../errors":6,"../runnable":33,"../runner":34,"../utils":38,"./base":17,"_process":68,"fs":42,"mkdirp":59,"path":42}],33:[function(require,module,exports){
+(function (global){
+'use strict';
+
+var EventEmitter = require('events').EventEmitter;
+var Pending = require('./pending');
+var debug = require('debug')('mocha:runnable');
+var milliseconds = require('ms');
+var utils = require('./utils');
+var createInvalidExceptionError = require('./errors')
+  .createInvalidExceptionError;
+
+/**
+ * Save timer references to avoid Sinon interfering (see GH-237).
+ */
+var Date = global.Date;
+var setTimeout = global.setTimeout;
+var clearTimeout = global.clearTimeout;
+var toString = Object.prototype.toString;
+
+module.exports = Runnable;
+
+/**
+ * Initialize a new `Runnable` with the given `title` and callback `fn`.
+ *
+ * @class
+ * @extends external:EventEmitter
+ * @public
+ * @param {String} title
+ * @param {Function} fn
+ */
+function Runnable(title, fn) {
+  this.title = title;
+  this.fn = fn;
+  this.body = (fn || '').toString();
+  this.async = fn && fn.length;
+  this.sync = !this.async;
+  this._timeout = 2000;
+  this._slow = 75;
+  this._enableTimeouts = true;
+  this.timedOut = false;
+  this._retries = -1;
+  this._currentRetry = 0;
+  this.pending = false;
+}
+
+/**
+ * Inherit from `EventEmitter.prototype`.
+ */
+utils.inherits(Runnable, EventEmitter);
+
+/**
+ * Get current timeout value in msecs.
+ *
+ * @private
+ * @returns {number} current timeout threshold value
+ */
+/**
+ * @summary
+ * Set timeout threshold value (msecs).
+ *
+ * @description
+ * A string argument can use shorthand (e.g., "2s") and will be converted.
+ * The value will be clamped to range [<code>0</code>, <code>2^<sup>31</sup>-1</code>].
+ * If clamped value matches either range endpoint, timeouts will be disabled.
+ *
+ * @private
+ * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setTimeout#Maximum_delay_value}
+ * @param {number|string} ms - Timeout threshold value.
+ * @returns {Runnable} this
+ * @chainable
+ */
+Runnable.prototype.timeout = function(ms) {
+  if (!arguments.length) {
+    return this._timeout;
+  }
+  if (typeof ms === 'string') {
+    ms = milliseconds(ms);
+  }
+
+  // Clamp to range
+  var INT_MAX = Math.pow(2, 31) - 1;
+  var range = [0, INT_MAX];
+  ms = utils.clamp(ms, range);
+
+  // see #1652 for reasoning
+  if (ms === range[0] || ms === range[1]) {
+    this._enableTimeouts = false;
+  }
+  debug('timeout %d', ms);
+  this._timeout = ms;
+  if (this.timer) {
+    this.resetTimeout();
+  }
+  return this;
+};
+
+/**
+ * Set or get slow `ms`.
+ *
+ * @private
+ * @param {number|string} ms
+ * @return {Runnable|number} ms or Runnable instance.
+ */
+Runnable.prototype.slow = function(ms) {
+  if (!arguments.length || typeof ms === 'undefined') {
+    return this._slow;
+  }
+  if (typeof ms === 'string') {
+    ms = milliseconds(ms);
+  }
+  debug('slow %d', ms);
+  this._slow = ms;
+  return this;
+};
+
+/**
+ * Set and get whether timeout is `enabled`.
+ *
+ * @private
+ * @param {boolean} enabled
+ * @return {Runnable|boolean} enabled or Runnable instance.
+ */
+Runnable.prototype.enableTimeouts = function(enabled) {
+  if (!arguments.length) {
+    return this._enableTimeouts;
+  }
+  debug('enableTimeouts %s', enabled);
+  this._enableTimeouts = enabled;
+  return this;
+};
+
+/**
+ * Halt and mark as pending.
+ *
+ * @memberof Mocha.Runnable
+ * @public
+ */
+Runnable.prototype.skip = function() {
+  throw new Pending('sync skip');
+};
+
+/**
+ * Check if this runnable or its parent suite is marked as pending.
+ *
+ * @private
+ */
+Runnable.prototype.isPending = function() {
+  return this.pending || (this.parent && this.parent.isPending());
+};
+
+/**
+ * Return `true` if this Runnable has failed.
+ * @return {boolean}
+ * @private
+ */
+Runnable.prototype.isFailed = function() {
+  return !this.isPending() && this.state === constants.STATE_FAILED;
+};
+
+/**
+ * Return `true` if this Runnable has passed.
+ * @return {boolean}
+ * @private
+ */
+Runnable.prototype.isPassed = function() {
+  return !this.isPending() && this.state === constants.STATE_PASSED;
+};
+
+/**
+ * Set or get number of retries.
+ *
+ * @private
+ */
+Runnable.prototype.retries = function(n) {
+  if (!arguments.length) {
+    return this._retries;
+  }
+  this._retries = n;
+};
+
+/**
+ * Set or get current retry
+ *
+ * @private
+ */
+Runnable.prototype.currentRetry = function(n) {
+  if (!arguments.length) {
+    return this._currentRetry;
+  }
+  this._currentRetry = n;
+};
+
+/**
+ * Return the full title generated by recursively concatenating the parent's
+ * full title.
+ *
+ * @memberof Mocha.Runnable
+ * @public
+ * @return {string}
+ */
+Runnable.prototype.fullTitle = function() {
+  return this.titlePath().join(' ');
+};
+
+/**
+ * Return the title path generated by concatenating the parent's title path with the title.
+ *
+ * @memberof Mocha.Runnable
+ * @public
+ * @return {string}
+ */
+Runnable.prototype.titlePath = function() {
+  return this.parent.titlePath().concat([this.title]);
+};
+
+/**
+ * Clear the timeout.
+ *
+ * @private
+ */
+Runnable.prototype.clearTimeout = function() {
+  clearTimeout(this.timer);
+};
+
+/**
+ * Inspect the runnable void of private properties.
+ *
+ * @private
+ * @return {string}
+ */
+Runnable.prototype.inspect = function() {
+  return JSON.stringify(
+    this,
+    function(key, val) {
+      if (key[0] === '_') {
+        return;
+      }
+      if (key === 'parent') {
+        return '#<Suite>';
+      }
+      if (key === 'ctx') {
+        return '#<Context>';
+      }
+      return val;
+    },
+    2
+  );
+};
+
+/**
+ * Reset the timeout.
+ *
+ * @private
+ */
+Runnable.prototype.resetTimeout = function() {
+  var self = this;
+  var ms = this.timeout() || 1e9;
+
+  if (!this._enableTimeouts) {
+    return;
+  }
+  this.clearTimeout();
+  this.timer = setTimeout(function() {
+    if (!self._enableTimeouts) {
+      return;
+    }
+    self.callback(self._timeoutError(ms));
+    self.timedOut = true;
+  }, ms);
+};
+
+/**
+ * Set or get a list of whitelisted globals for this test run.
+ *
+ * @private
+ * @param {string[]} globals
+ */
+Runnable.prototype.globals = function(globals) {
+  if (!arguments.length) {
+    return this._allowedGlobals;
+  }
+  this._allowedGlobals = globals;
+};
+
+/**
+ * Run the test and invoke `fn(err)`.
+ *
+ * @param {Function} fn
+ * @private
+ */
+Runnable.prototype.run = function(fn) {
+  var self = this;
+  var start = new Date();
+  var ctx = this.ctx;
+  var finished;
+  var emitted;
+
+  // Sometimes the ctx exists, but it is not runnable
+  if (ctx && ctx.runnable) {
+    ctx.runnable(this);
+  }
+
+  // called multiple times
+  function multiple(err) {
+    if (emitted) {
+      return;
+    }
+    emitted = true;
+    var msg = 'done() called multiple times';
+    if (err && err.message) {
+      err.message += " (and Mocha's " + msg + ')';
+      self.emit('error', err);
+    } else {
+      self.emit('error', new Error(msg));
+    }
+  }
+
+  // finished
+  function done(err) {
+    var ms = self.timeout();
+    if (self.timedOut) {
+      return;
+    }
+
+    if (finished) {
+      return multiple(err);
+    }
+
+    self.clearTimeout();
+    self.duration = new Date() - start;
+    finished = true;
+    if (!err && self.duration > ms && self._enableTimeouts) {
+      err = self._timeoutError(ms);
+    }
+    fn(err);
+  }
+
+  // for .resetTimeout()
+  this.callback = done;
+
+  // explicit async with `done` argument
+  if (this.async) {
+    this.resetTimeout();
+
+    // allows skip() to be used in an explicit async context
+    this.skip = function asyncSkip() {
+      done(new Pending('async skip call'));
+      // halt execution.  the Runnable will be marked pending
+      // by the previous call, and the uncaught handler will ignore
+      // the failure.
+      throw new Pending('async skip; aborting execution');
+    };
+
+    if (this.allowUncaught) {
+      return callFnAsync(this.fn);
+    }
+    try {
+      callFnAsync(this.fn);
+    } catch (err) {
+      emitted = true;
+      done(Runnable.toValueOrError(err));
+    }
+    return;
+  }
+
+  if (this.allowUncaught) {
+    if (this.isPending()) {
+      done();
+    } else {
+      callFn(this.fn);
+    }
+    return;
+  }
+
+  // sync or promise-returning
+  try {
+    if (this.isPending()) {
+      done();
+    } else {
+      callFn(this.fn);
+    }
+  } catch (err) {
+    emitted = true;
+    done(Runnable.toValueOrError(err));
+  }
+
+  function callFn(fn) {
+    var result = fn.call(ctx);
+    if (result && typeof result.then === 'function') {
+      self.resetTimeout();
+      result.then(
+        function() {
+          done();
+          // Return null so libraries like bluebird do not warn about
+          // subsequently constructed Promises.
+          return null;
+        },
+        function(reason) {
+          done(reason || new Error('Promise rejected with no or falsy reason'));
+        }
+      );
+    } else {
+      if (self.asyncOnly) {
+        return done(
+          new Error(
+            '--async-only option in use without declaring `done()` or returning a promise'
+          )
+        );
+      }
+
+      done();
+    }
+  }
+
+  function callFnAsync(fn) {
+    var result = fn.call(ctx, function(err) {
+      if (err instanceof Error || toString.call(err) === '[object Error]') {
+        return done(err);
+      }
+      if (err) {
+        if (Object.prototype.toString.call(err) === '[object Object]') {
+          return done(
+            new Error('done() invoked with non-Error: ' + JSON.stringify(err))
+          );
+        }
+        return done(new Error('done() invoked with non-Error: ' + err));
+      }
+      if (result && utils.isPromise(result)) {
+        return done(
+          new Error(
+            'Resolution method is overspecified. Specify a callback *or* return a Promise; not both.'
+          )
+        );
+      }
+
+      done();
+    });
+  }
+};
+
+/**
+ * Instantiates a "timeout" error
+ *
+ * @param {number} ms - Timeout (in milliseconds)
+ * @returns {Error} a "timeout" error
+ * @private
+ */
+Runnable.prototype._timeoutError = function(ms) {
+  var msg =
+    'Timeout of ' +
+    ms +
+    'ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.';
+  if (this.file) {
+    msg += ' (' + this.file + ')';
+  }
+  return new Error(msg);
+};
+
+var constants = utils.defineConstants(
+  /**
+   * {@link Runnable}-related constants.
+   * @public
+   * @memberof Runnable
+   * @readonly
+   * @static
+   * @alias constants
+   * @enum {string}
+   */
+  {
+    /**
+     * Value of `state` prop when a `Runnable` has failed
+     */
+    STATE_FAILED: 'failed',
+    /**
+     * Value of `state` prop when a `Runnable` has passed
+     */
+    STATE_PASSED: 'passed'
+  }
+);
+
+/**
+ * Given `value`, return identity if truthy, otherwise create an "invalid exception" error and return that.
+ * @param {*} [value] - Value to return, if present
+ * @returns {*|Error} `value`, otherwise an `Error`
+ * @private
+ */
+Runnable.toValueOrError = function(value) {
+  return (
+    value ||
+    createInvalidExceptionError(
+      'Runnable failed with falsy or undefined exception. Please throw an Error instead.',
+      value
+    )
+  );
+};
+
+Runnable.constants = constants;
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./errors":6,"./pending":16,"./utils":38,"debug":45,"events":50,"ms":60}],34:[function(require,module,exports){
+(function (process,global){
+'use strict';
+
+/**
+ * Module dependencies.
+ */
+var util = require('util');
+var EventEmitter = require('events').EventEmitter;
+var Pending = require('./pending');
+var utils = require('./utils');
+var inherits = utils.inherits;
+var debug = require('debug')('mocha:runner');
+var Runnable = require('./runnable');
+var Suite = require('./suite');
+var HOOK_TYPE_BEFORE_EACH = Suite.constants.HOOK_TYPE_BEFORE_EACH;
+var HOOK_TYPE_AFTER_EACH = Suite.constants.HOOK_TYPE_AFTER_EACH;
+var HOOK_TYPE_AFTER_ALL = Suite.constants.HOOK_TYPE_AFTER_ALL;
+var HOOK_TYPE_BEFORE_ALL = Suite.constants.HOOK_TYPE_BEFORE_ALL;
+var EVENT_ROOT_SUITE_RUN = Suite.constants.EVENT_ROOT_SUITE_RUN;
+var STATE_FAILED = Runnable.constants.STATE_FAILED;
+var STATE_PASSED = Runnable.constants.STATE_PASSED;
+var dQuote = utils.dQuote;
+var ngettext = utils.ngettext;
+var sQuote = utils.sQuote;
+var stackFilter = utils.stackTraceFilter();
+var stringify = utils.stringify;
+var type = utils.type;
+var createInvalidExceptionError = require('./errors')
+  .createInvalidExceptionError;
+
+/**
+ * Non-enumerable globals.
+ * @readonly
+ */
+var globals = [
+  'setTimeout',
+  'clearTimeout',
+  'setInterval',
+  'clearInterval',
+  'XMLHttpRequest',
+  'Date',
+  'setImmediate',
+  'clearImmediate'
+];
+
+var constants = utils.defineConstants(
+  /**
+   * {@link Runner}-related constants.
+   * @public
+   * @memberof Runner
+   * @readonly
+   * @alias constants
+   * @static
+   * @enum {string}
+   */
+  {
+    /**
+     * Emitted when {@link Hook} execution begins
+     */
+    EVENT_HOOK_BEGIN: 'hook',
+    /**
+     * Emitted when {@link Hook} execution ends
+     */
+    EVENT_HOOK_END: 'hook end',
+    /**
+     * Emitted when Root {@link Suite} execution begins (all files have been parsed and hooks/tests are ready for execution)
+     */
+    EVENT_RUN_BEGIN: 'start',
+    /**
+     * Emitted when Root {@link Suite} execution has been delayed via `delay` option
+     */
+    EVENT_DELAY_BEGIN: 'waiting',
+    /**
+     * Emitted when delayed Root {@link Suite} execution is triggered by user via `global.run()`
+     */
+    EVENT_DELAY_END: 'ready',
+    /**
+     * Emitted when Root {@link Suite} execution ends
+     */
+    EVENT_RUN_END: 'end',
+    /**
+     * Emitted when {@link Suite} execution begins
+     */
+    EVENT_SUITE_BEGIN: 'suite',
+    /**
+     * Emitted when {@link Suite} execution ends
+     */
+    EVENT_SUITE_END: 'suite end',
+    /**
+     * Emitted when {@link Test} execution begins
+     */
+    EVENT_TEST_BEGIN: 'test',
+    /**
+     * Emitted when {@link Test} execution ends
+     */
+    EVENT_TEST_END: 'test end',
+    /**
+     * Emitted when {@link Test} execution fails
+     */
+    EVENT_TEST_FAIL: 'fail',
+    /**
+     * Emitted when {@link Test} execution succeeds
+     */
+    EVENT_TEST_PASS: 'pass',
+    /**
+     * Emitted when {@link Test} becomes pending
+     */
+    EVENT_TEST_PENDING: 'pending',
+    /**
+     * Emitted when {@link Test} execution has failed, but will retry
+     */
+    EVENT_TEST_RETRY: 'retry'
+  }
+);
+
+module.exports = Runner;
+
+/**
+ * Initialize a `Runner` at the Root {@link Suite}, which represents a hierarchy of {@link Suite|Suites} and {@link Test|Tests}.
+ *
+ * @extends external:EventEmitter
+ * @public
+ * @class
+ * @param {Suite} suite Root suite
+ * @param {boolean} [delay] Whether or not to delay execution of root suite
+ * until ready.
+ */
+function Runner(suite, delay) {
+  var self = this;
+  this._globals = [];
+  this._abort = false;
+  this._delay = delay;
+  this.suite = suite;
+  this.started = false;
+  this.total = suite.total();
+  this.failures = 0;
+  this.on(constants.EVENT_TEST_END, function(test) {
+    self.checkGlobals(test);
+  });
+  this.on(constants.EVENT_HOOK_END, function(hook) {
+    self.checkGlobals(hook);
+  });
+  this._defaultGrep = /.*/;
+  this.grep(this._defaultGrep);
+  this.globals(this.globalProps().concat(extraGlobals()));
+}
+
+/**
+ * Wrapper for setImmediate, process.nextTick, or browser polyfill.
+ *
+ * @param {Function} fn
+ * @private
+ */
+Runner.immediately = global.setImmediate || process.nextTick;
+
+/**
+ * Inherit from `EventEmitter.prototype`.
+ */
+inherits(Runner, EventEmitter);
+
+/**
+ * Run tests with full titles matching `re`. Updates runner.total
+ * with number of tests matched.
+ *
+ * @public
+ * @memberof Runner
+ * @param {RegExp} re
+ * @param {boolean} invert
+ * @return {Runner} Runner instance.
+ */
+Runner.prototype.grep = function(re, invert) {
+  debug('grep %s', re);
+  this._grep = re;
+  this._invert = invert;
+  this.total = this.grepTotal(this.suite);
+  return this;
+};
+
+/**
+ * Returns the number of tests matching the grep search for the
+ * given suite.
+ *
+ * @memberof Runner
+ * @public
+ * @param {Suite} suite
+ * @return {number}
+ */
+Runner.prototype.grepTotal = function(suite) {
+  var self = this;
+  var total = 0;
+
+  suite.eachTest(function(test) {
+    var match = self._grep.test(test.fullTitle());
+    if (self._invert) {
+      match = !match;
+    }
+    if (match) {
+      total++;
+    }
+  });
+
+  return total;
+};
+
+/**
+ * Return a list of global properties.
+ *
+ * @return {Array}
+ * @private
+ */
+Runner.prototype.globalProps = function() {
+  var props = Object.keys(global);
+
+  // non-enumerables
+  for (var i = 0; i < globals.length; ++i) {
+    if (~props.indexOf(globals[i])) {
+      continue;
+    }
+    props.push(globals[i]);
+  }
+
+  return props;
+};
+
+/**
+ * Allow the given `arr` of globals.
+ *
+ * @public
+ * @memberof Runner
+ * @param {Array} arr
+ * @return {Runner} Runner instance.
+ */
+Runner.prototype.globals = function(arr) {
+  if (!arguments.length) {
+    return this._globals;
+  }
+  debug('globals %j', arr);
+  this._globals = this._globals.concat(arr);
+  return this;
+};
+
+/**
+ * Check for global variable leaks.
+ *
+ * @private
+ */
+Runner.prototype.checkGlobals = function(test) {
+  if (this.ignoreLeaks) {
+    return;
+  }
+  var ok = this._globals;
+
+  var globals = this.globalProps();
+  var leaks;
+
+  if (test) {
+    ok = ok.concat(test._allowedGlobals || []);
+  }
+
+  if (this.prevGlobalsLength === globals.length) {
+    return;
+  }
+  this.prevGlobalsLength = globals.length;
+
+  leaks = filterLeaks(ok, globals);
+  this._globals = this._globals.concat(leaks);
+
+  if (leaks.length) {
+    var format = ngettext(
+      leaks.length,
+      'global leak detected: %s',
+      'global leaks detected: %s'
+    );
+    var error = new Error(util.format(format, leaks.map(sQuote).join(', ')));
+    this.fail(test, error);
+  }
+};
+
+/**
+ * Fail the given `test`.
+ *
+ * @private
+ * @param {Test} test
+ * @param {Error} err
+ */
+Runner.prototype.fail = function(test, err) {
+  if (test.isPending()) {
+    return;
+  }
+
+  ++this.failures;
+  test.state = STATE_FAILED;
+
+  if (!isError(err)) {
+    err = thrown2Error(err);
+  }
+
+  try {
+    err.stack =
+      this.fullStackTrace || !err.stack ? err.stack : stackFilter(err.stack);
+  } catch (ignore) {
+    // some environments do not take kindly to monkeying with the stack
+  }
+
+  this.emit(constants.EVENT_TEST_FAIL, test, err);
+};
+
+/**
+ * Fail the given `hook` with `err`.
+ *
+ * Hook failures work in the following pattern:
+ * - If bail, run corresponding `after each` and `after` hooks,
+ *   then exit
+ * - Failed `before` hook skips all tests in a suite and subsuites,
+ *   but jumps to corresponding `after` hook
+ * - Failed `before each` hook skips remaining tests in a
+ *   suite and jumps to corresponding `after each` hook,
+ *   which is run only once
+ * - Failed `after` hook does not alter
+ *   execution order
+ * - Failed `after each` hook skips remaining tests in a
+ *   suite and subsuites, but executes other `after each`
+ *   hooks
+ *
+ * @private
+ * @param {Hook} hook
+ * @param {Error} err
+ */
+Runner.prototype.failHook = function(hook, err) {
+  hook.originalTitle = hook.originalTitle || hook.title;
+  if (hook.ctx && hook.ctx.currentTest) {
+    hook.title =
+      hook.originalTitle + ' for ' + dQuote(hook.ctx.currentTest.title);
+  } else {
+    var parentTitle;
+    if (hook.parent.title) {
+      parentTitle = hook.parent.title;
+    } else {
+      parentTitle = hook.parent.root ? '{root}' : '';
+    }
+    hook.title = hook.originalTitle + ' in ' + dQuote(parentTitle);
+  }
+
+  this.fail(hook, err);
+};
+
+/**
+ * Run hook `name` callbacks and then invoke `fn()`.
+ *
+ * @private
+ * @param {string} name
+ * @param {Function} fn
+ */
+
+Runner.prototype.hook = function(name, fn) {
+  var suite = this.suite;
+  var hooks = suite.getHooks(name);
+  var self = this;
+
+  function next(i) {
+    var hook = hooks[i];
+    if (!hook) {
+      return fn();
+    }
+    self.currentRunnable = hook;
+
+    if (name === 'beforeAll') {
+      hook.ctx.currentTest = hook.parent.tests[0];
+    } else if (name === 'afterAll') {
+      hook.ctx.currentTest = hook.parent.tests[hook.parent.tests.length - 1];
+    } else {
+      hook.ctx.currentTest = self.test;
+    }
+
+    self.emit(constants.EVENT_HOOK_BEGIN, hook);
+
+    if (!hook.listeners('error').length) {
+      hook.on('error', function(err) {
+        self.failHook(hook, err);
+      });
+    }
+
+    hook.run(function(err) {
+      var testError = hook.error();
+      if (testError) {
+        self.fail(self.test, testError);
+      }
+      if (err) {
+        if (err instanceof Pending) {
+          if (name === HOOK_TYPE_BEFORE_EACH || name === HOOK_TYPE_AFTER_EACH) {
+            self.test.pending = true;
+          } else {
+            suite.tests.forEach(function(test) {
+              test.pending = true;
+            });
+            suite.suites.forEach(function(suite) {
+              suite.pending = true;
+            });
+            // a pending hook won't be executed twice.
+            hook.pending = true;
+          }
+        } else {
+          self.failHook(hook, err);
+
+          // stop executing hooks, notify callee of hook err
+          return fn(err);
+        }
+      }
+      self.emit(constants.EVENT_HOOK_END, hook);
+      delete hook.ctx.currentTest;
+      next(++i);
+    });
+  }
+
+  Runner.immediately(function() {
+    next(0);
+  });
+};
+
+/**
+ * Run hook `name` for the given array of `suites`
+ * in order, and callback `fn(err, errSuite)`.
+ *
+ * @private
+ * @param {string} name
+ * @param {Array} suites
+ * @param {Function} fn
+ */
+Runner.prototype.hooks = function(name, suites, fn) {
+  var self = this;
+  var orig = this.suite;
+
+  function next(suite) {
+    self.suite = suite;
+
+    if (!suite) {
+      self.suite = orig;
+      return fn();
+    }
+
+    self.hook(name, function(err) {
+      if (err) {
+        var errSuite = self.suite;
+        self.suite = orig;
+        return fn(err, errSuite);
+      }
+
+      next(suites.pop());
+    });
+  }
+
+  next(suites.pop());
+};
+
+/**
+ * Run hooks from the top level down.
+ *
+ * @param {String} name
+ * @param {Function} fn
+ * @private
+ */
+Runner.prototype.hookUp = function(name, fn) {
+  var suites = [this.suite].concat(this.parents()).reverse();
+  this.hooks(name, suites, fn);
+};
+
+/**
+ * Run hooks from the bottom up.
+ *
+ * @param {String} name
+ * @param {Function} fn
+ * @private
+ */
+Runner.prototype.hookDown = function(name, fn) {
+  var suites = [this.suite].concat(this.parents());
+  this.hooks(name, suites, fn);
+};
+
+/**
+ * Return an array of parent Suites from
+ * closest to furthest.
+ *
+ * @return {Array}
+ * @private
+ */
+Runner.prototype.parents = function() {
+  var suite = this.suite;
+  var suites = [];
+  while (suite.parent) {
+    suite = suite.parent;
+    suites.push(suite);
+  }
+  return suites;
+};
+
+/**
+ * Run the current test and callback `fn(err)`.
+ *
+ * @param {Function} fn
+ * @private
+ */
+Runner.prototype.runTest = function(fn) {
+  var self = this;
+  var test = this.test;
+
+  if (!test) {
+    return;
+  }
+
+  var suite = this.parents().reverse()[0] || this.suite;
+  if (this.forbidOnly && suite.hasOnly()) {
+    fn(new Error('`.only` forbidden'));
+    return;
+  }
+  if (this.asyncOnly) {
+    test.asyncOnly = true;
+  }
+  test.on('error', function(err) {
+    self.fail(test, err);
+  });
+  if (this.allowUncaught) {
+    test.allowUncaught = true;
+    return test.run(fn);
+  }
+  try {
+    test.run(fn);
+  } catch (err) {
+    fn(err);
+  }
+};
+
+/**
+ * Run tests in the given `suite` and invoke the callback `fn()` when complete.
+ *
+ * @private
+ * @param {Suite} suite
+ * @param {Function} fn
+ */
+Runner.prototype.runTests = function(suite, fn) {
+  var self = this;
+  var tests = suite.tests.slice();
+  var test;
+
+  function hookErr(_, errSuite, after) {
+    // before/after Each hook for errSuite failed:
+    var orig = self.suite;
+
+    // for failed 'after each' hook start from errSuite parent,
+    // otherwise start from errSuite itself
+    self.suite = after ? errSuite.parent : errSuite;
+
+    if (self.suite) {
+      // call hookUp afterEach
+      self.hookUp(HOOK_TYPE_AFTER_EACH, function(err2, errSuite2) {
+        self.suite = orig;
+        // some hooks may fail even now
+        if (err2) {
+          return hookErr(err2, errSuite2, true);
+        }
+        // report error suite
+        fn(errSuite);
+      });
+    } else {
+      // there is no need calling other 'after each' hooks
+      self.suite = orig;
+      fn(errSuite);
+    }
+  }
+
+  function next(err, errSuite) {
+    // if we bail after first err
+    if (self.failures && suite._bail) {
+      tests = [];
+    }
+
+    if (self._abort) {
+      return fn();
+    }
+
+    if (err) {
+      return hookErr(err, errSuite, true);
+    }
+
+    // next test
+    test = tests.shift();
+
+    // all done
+    if (!test) {
+      return fn();
+    }
+
+    // grep
+    var match = self._grep.test(test.fullTitle());
+    if (self._invert) {
+      match = !match;
+    }
+    if (!match) {
+      // Run immediately only if we have defined a grep. When we
+      // define a grep — It can cause maximum callstack error if
+      // the grep is doing a large recursive loop by neglecting
+      // all tests. The run immediately function also comes with
+      // a performance cost. So we don't want to run immediately
+      // if we run the whole test suite, because running the whole
+      // test suite don't do any immediate recursive loops. Thus,
+      // allowing a JS runtime to breathe.
+      if (self._grep !== self._defaultGrep) {
+        Runner.immediately(next);
+      } else {
+        next();
+      }
+      return;
+    }
+
+    if (test.isPending()) {
+      if (self.forbidPending) {
+        test.isPending = alwaysFalse;
+        self.fail(test, new Error('Pending test forbidden'));
+        delete test.isPending;
+      } else {
+        self.emit(constants.EVENT_TEST_PENDING, test);
+      }
+      self.emit(constants.EVENT_TEST_END, test);
+      return next();
+    }
+
+    // execute test and hook(s)
+    self.emit(constants.EVENT_TEST_BEGIN, (self.test = test));
+    self.hookDown(HOOK_TYPE_BEFORE_EACH, function(err, errSuite) {
+      if (test.isPending()) {
+        if (self.forbidPending) {
+          test.isPending = alwaysFalse;
+          self.fail(test, new Error('Pending test forbidden'));
+          delete test.isPending;
+        } else {
+          self.emit(constants.EVENT_TEST_PENDING, test);
+        }
+        self.emit(constants.EVENT_TEST_END, test);
+        return next();
+      }
+      if (err) {
+        return hookErr(err, errSuite, false);
+      }
+      self.currentRunnable = self.test;
+      self.runTest(function(err) {
+        test = self.test;
+        if (err) {
+          var retry = test.currentRetry();
+          if (err instanceof Pending && self.forbidPending) {
+            self.fail(test, new Error('Pending test forbidden'));
+          } else if (err instanceof Pending) {
+            test.pending = true;
+            self.emit(constants.EVENT_TEST_PENDING, test);
+          } else if (retry < test.retries()) {
+            var clonedTest = test.clone();
+            clonedTest.currentRetry(retry + 1);
+            tests.unshift(clonedTest);
+
+            self.emit(constants.EVENT_TEST_RETRY, test, err);
+
+            // Early return + hook trigger so that it doesn't
+            // increment the count wrong
+            return self.hookUp(HOOK_TYPE_AFTER_EACH, next);
+          } else {
+            self.fail(test, err);
+          }
+          self.emit(constants.EVENT_TEST_END, test);
+
+          if (err instanceof Pending) {
+            return next();
+          }
+
+          return self.hookUp(HOOK_TYPE_AFTER_EACH, next);
+        }
+
+        test.state = STATE_PASSED;
+        self.emit(constants.EVENT_TEST_PASS, test);
+        self.emit(constants.EVENT_TEST_END, test);
+        self.hookUp(HOOK_TYPE_AFTER_EACH, next);
+      });
+    });
+  }
+
+  this.next = next;
+  this.hookErr = hookErr;
+  next();
+};
+
+function alwaysFalse() {
+  return false;
+}
+
+/**
+ * Run the given `suite` and invoke the callback `fn()` when complete.
+ *
+ * @private
+ * @param {Suite} suite
+ * @param {Function} fn
+ */
+Runner.prototype.runSuite = function(suite, fn) {
+  var i = 0;
+  var self = this;
+  var total = this.grepTotal(suite);
+  var afterAllHookCalled = false;
+
+  debug('run suite %s', suite.fullTitle());
+
+  if (!total || (self.failures && suite._bail)) {
+    return fn();
+  }
+
+  this.emit(constants.EVENT_SUITE_BEGIN, (this.suite = suite));
+
+  function next(errSuite) {
+    if (errSuite) {
+      // current suite failed on a hook from errSuite
+      if (errSuite === suite) {
+        // if errSuite is current suite
+        // continue to the next sibling suite
+        return done();
+      }
+      // errSuite is among the parents of current suite
+      // stop execution of errSuite and all sub-suites
+      return done(errSuite);
+    }
+
+    if (self._abort) {
+      return done();
+    }
+
+    var curr = suite.suites[i++];
+    if (!curr) {
+      return done();
+    }
+
+    // Avoid grep neglecting large number of tests causing a
+    // huge recursive loop and thus a maximum call stack error.
+    // See comment in `this.runTests()` for more information.
+    if (self._grep !== self._defaultGrep) {
+      Runner.immediately(function() {
+        self.runSuite(curr, next);
+      });
+    } else {
+      self.runSuite(curr, next);
+    }
+  }
+
+  function done(errSuite) {
+    self.suite = suite;
+    self.nextSuite = next;
+
+    if (afterAllHookCalled) {
+      fn(errSuite);
+    } else {
+      // mark that the afterAll block has been called once
+      // and so can be skipped if there is an error in it.
+      afterAllHookCalled = true;
+
+      // remove reference to test
+      delete self.test;
+
+      self.hook(HOOK_TYPE_AFTER_ALL, function() {
+        self.emit(constants.EVENT_SUITE_END, suite);
+        fn(errSuite);
+      });
+    }
+  }
+
+  this.nextSuite = next;
+
+  this.hook(HOOK_TYPE_BEFORE_ALL, function(err) {
+    if (err) {
+      return done();
+    }
+    self.runTests(suite, next);
+  });
+};
+
+/**
+ * Handle uncaught exceptions.
+ *
+ * @param {Error} err
+ * @private
+ */
+Runner.prototype.uncaught = function(err) {
+  if (err) {
+    debug('uncaught exception %O', err);
+  } else {
+    debug('uncaught undefined/falsy exception');
+    err = createInvalidExceptionError(
+      'Caught falsy/undefined exception which would otherwise be uncaught. No stack trace found; try a debugger',
+      err
+    );
+  }
+
+  if (!isError(err)) {
+    err = thrown2Error(err);
+  }
+  err.uncaught = true;
+
+  var runnable = this.currentRunnable;
+
+  if (!runnable) {
+    runnable = new Runnable('Uncaught error outside test suite');
+    runnable.parent = this.suite;
+
+    if (this.started) {
+      this.fail(runnable, err);
+    } else {
+      // Can't recover from this failure
+      this.emit(constants.EVENT_RUN_BEGIN);
+      this.fail(runnable, err);
+      this.emit(constants.EVENT_RUN_END);
+    }
+
+    return;
+  }
+
+  runnable.clearTimeout();
+
+  // Ignore errors if already failed or pending
+  // See #3226
+  if (runnable.isFailed() || runnable.isPending()) {
+    return;
+  }
+  // we cannot recover gracefully if a Runnable has already passed
+  // then fails asynchronously
+  var alreadyPassed = runnable.isPassed();
+  // this will change the state to "failed" regardless of the current value
+  this.fail(runnable, err);
+  if (!alreadyPassed) {
+    // recover from test
+    if (runnable.type === constants.EVENT_TEST_BEGIN) {
+      this.emit(constants.EVENT_TEST_END, runnable);
+      this.hookUp(HOOK_TYPE_AFTER_EACH, this.next);
+      return;
+    }
+    debug(runnable);
+
+    // recover from hooks
+    var errSuite = this.suite;
+
+    // XXX how about a less awful way to determine this?
+    // if hook failure is in afterEach block
+    if (runnable.fullTitle().indexOf('after each') > -1) {
+      return this.hookErr(err, errSuite, true);
+    }
+    // if hook failure is in beforeEach block
+    if (runnable.fullTitle().indexOf('before each') > -1) {
+      return this.hookErr(err, errSuite, false);
+    }
+    // if hook failure is in after or before blocks
+    return this.nextSuite(errSuite);
+  }
+
+  // bail
+  this.emit(constants.EVENT_RUN_END);
+};
+
+/**
+ * Run the root suite and invoke `fn(failures)`
+ * on completion.
+ *
+ * @public
+ * @memberof Runner
+ * @param {Function} fn
+ * @return {Runner} Runner instance.
+ */
+Runner.prototype.run = function(fn) {
+  var self = this;
+  var rootSuite = this.suite;
+
+  fn = fn || function() {};
+
+  function uncaught(err) {
+    self.uncaught(err);
+  }
+
+  function start() {
+    // If there is an `only` filter
+    if (rootSuite.hasOnly()) {
+      rootSuite.filterOnly();
+    }
+    self.started = true;
+    if (self._delay) {
+      self.emit(constants.EVENT_DELAY_END);
+    }
+    self.emit(constants.EVENT_RUN_BEGIN);
+
+    self.runSuite(rootSuite, function() {
+      debug('finished running');
+      self.emit(constants.EVENT_RUN_END);
+    });
+  }
+
+  debug(constants.EVENT_RUN_BEGIN);
+
+  // references cleanup to avoid memory leaks
+  this.on(constants.EVENT_SUITE_END, function(suite) {
+    suite.cleanReferences();
+  });
+
+  // callback
+  this.on(constants.EVENT_RUN_END, function() {
+    debug(constants.EVENT_RUN_END);
+    process.removeListener('uncaughtException', uncaught);
+    fn(self.failures);
+  });
+
+  // uncaught exception
+  process.on('uncaughtException', uncaught);
+
+  if (this._delay) {
+    // for reporters, I guess.
+    // might be nice to debounce some dots while we wait.
+    this.emit(constants.EVENT_DELAY_BEGIN, rootSuite);
+    rootSuite.once(EVENT_ROOT_SUITE_RUN, start);
+  } else {
+    start();
+  }
+
+  return this;
+};
+
+/**
+ * Cleanly abort execution.
+ *
+ * @memberof Runner
+ * @public
+ * @return {Runner} Runner instance.
+ */
+Runner.prototype.abort = function() {
+  debug('aborting');
+  this._abort = true;
+
+  return this;
+};
+
+/**
+ * Filter leaks with the given globals flagged as `ok`.
+ *
+ * @private
+ * @param {Array} ok
+ * @param {Array} globals
+ * @return {Array}
+ */
+function filterLeaks(ok, globals) {
+  return globals.filter(function(key) {
+    // Firefox and Chrome exposes iframes as index inside the window object
+    if (/^\d+/.test(key)) {
+      return false;
+    }
+
+    // in firefox
+    // if runner runs in an iframe, this iframe's window.getInterface method
+    // not init at first it is assigned in some seconds
+    if (global.navigator && /^getInterface/.test(key)) {
+      return false;
+    }
+
+    // an iframe could be approached by window[iframeIndex]
+    // in ie6,7,8 and opera, iframeIndex is enumerable, this could cause leak
+    if (global.navigator && /^\d+/.test(key)) {
+      return false;
+    }
+
+    // Opera and IE expose global variables for HTML element IDs (issue #243)
+    if (/^mocha-/.test(key)) {
+      return false;
+    }
+
+    var matched = ok.filter(function(ok) {
+      if (~ok.indexOf('*')) {
+        return key.indexOf(ok.split('*')[0]) === 0;
+      }
+      return key === ok;
+    });
+    return !matched.length && (!global.navigator || key !== 'onerror');
+  });
+}
+
+/**
+ * Check if argument is an instance of Error object or a duck-typed equivalent.
+ *
+ * @private
+ * @param {Object} err - object to check
+ * @param {string} err.message - error message
+ * @returns {boolean}
+ */
+function isError(err) {
+  return err instanceof Error || (err && typeof err.message === 'string');
+}
+
+/**
+ *
+ * Converts thrown non-extensible type into proper Error.
+ *
+ * @private
+ * @param {*} thrown - Non-extensible type thrown by code
+ * @return {Error}
+ */
+function thrown2Error(err) {
+  return new Error(
+    'the ' + type(err) + ' ' + stringify(err) + ' was thrown, throw an Error :)'
+  );
+}
+
+/**
+ * Array of globals dependent on the environment.
+ *
+ * @return {Array}
+ * @deprecated
+ * @todo remove; long since unsupported
+ * @private
+ */
+function extraGlobals() {
+  if (typeof process === 'object' && typeof process.version === 'string') {
+    var parts = process.version.split('.');
+    var nodeVersion = parts.reduce(function(a, v) {
+      return (a << 8) | v;
+    });
+
+    // 'errno' was renamed to process._errno in v0.9.11.
+    if (nodeVersion < 0x00090b) {
+      return ['errno'];
+    }
+  }
+
+  return [];
+}
+
+Runner.constants = constants;
+
+/**
+ * Node.js' `EventEmitter`
+ * @external EventEmitter
+ * @see {@link https://nodejs.org/api/events.html#events_class_eventemitter}
+ */
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./errors":6,"./pending":16,"./runnable":33,"./suite":36,"./utils":38,"_process":68,"debug":45,"events":50,"util":88}],35:[function(require,module,exports){
+(function (global){
+'use strict';
+
+/**
+ * Provides a factory function for a {@link StatsCollector} object.
+ * @module
+ */
+
+var constants = require('./runner').constants;
+var EVENT_TEST_PASS = constants.EVENT_TEST_PASS;
+var EVENT_TEST_FAIL = constants.EVENT_TEST_FAIL;
+var EVENT_SUITE_BEGIN = constants.EVENT_SUITE_BEGIN;
+var EVENT_RUN_BEGIN = constants.EVENT_RUN_BEGIN;
+var EVENT_TEST_PENDING = constants.EVENT_TEST_PENDING;
+var EVENT_RUN_END = constants.EVENT_RUN_END;
+var EVENT_TEST_END = constants.EVENT_TEST_END;
+
+/**
+ * Test statistics collector.
+ *
+ * @public
+ * @typedef {Object} StatsCollector
+ * @property {number} suites - integer count of suites run.
+ * @property {number} tests - integer count of tests run.
+ * @property {number} passes - integer count of passing tests.
+ * @property {number} pending - integer count of pending tests.
+ * @property {number} failures - integer count of failed tests.
+ * @property {Date} start - time when testing began.
+ * @property {Date} end - time when testing concluded.
+ * @property {number} duration - number of msecs that testing took.
+ */
+
+var Date = global.Date;
+
+/**
+ * Provides stats such as test duration, number of tests passed / failed etc., by listening for events emitted by `runner`.
+ *
+ * @private
+ * @param {Runner} runner - Runner instance
+ * @throws {TypeError} If falsy `runner`
+ */
+function createStatsCollector(runner) {
+  /**
+   * @type StatsCollector
+   */
+  var stats = {
+    suites: 0,
+    tests: 0,
+    passes: 0,
+    pending: 0,
+    failures: 0
+  };
+
+  if (!runner) {
+    throw new TypeError('Missing runner argument');
+  }
+
+  runner.stats = stats;
+
+  runner.once(EVENT_RUN_BEGIN, function() {
+    stats.start = new Date();
+  });
+  runner.on(EVENT_SUITE_BEGIN, function(suite) {
+    suite.root || stats.suites++;
+  });
+  runner.on(EVENT_TEST_PASS, function() {
+    stats.passes++;
+  });
+  runner.on(EVENT_TEST_FAIL, function() {
+    stats.failures++;
+  });
+  runner.on(EVENT_TEST_PENDING, function() {
+    stats.pending++;
+  });
+  runner.on(EVENT_TEST_END, function() {
+    stats.tests++;
+  });
+  runner.once(EVENT_RUN_END, function() {
+    stats.end = new Date();
+    stats.duration = stats.end - stats.start;
+  });
+}
+
+module.exports = createStatsCollector;
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./runner":34}],36:[function(require,module,exports){
+'use strict';
+
+/**
+ * Module dependencies.
+ */
+var EventEmitter = require('events').EventEmitter;
+var Hook = require('./hook');
+var utils = require('./utils');
+var inherits = utils.inherits;
+var debug = require('debug')('mocha:suite');
+var milliseconds = require('ms');
+var errors = require('./errors');
+var createInvalidArgumentTypeError = errors.createInvalidArgumentTypeError;
+
+/**
+ * Expose `Suite`.
+ */
+
+exports = module.exports = Suite;
+
+/**
+ * Create a new `Suite` with the given `title` and parent `Suite`.
+ *
+ * @public
+ * @param {Suite} parent - Parent suite (required!)
+ * @param {string} title - Title
+ * @return {Suite}
+ */
+Suite.create = function(parent, title) {
+  var suite = new Suite(title, parent.ctx);
+  suite.parent = parent;
+  title = suite.fullTitle();
+  parent.addSuite(suite);
+  return suite;
+};
+
+/**
+ * Constructs a new `Suite` instance with the given `title`, `ctx`, and `isRoot`.
+ *
+ * @public
+ * @class
+ * @extends EventEmitter
+ * @see {@link https://nodejs.org/api/events.html#events_class_eventemitter|EventEmitter}
+ * @param {string} title - Suite title.
+ * @param {Context} parentContext - Parent context instance.
+ * @param {boolean} [isRoot=false] - Whether this is the root suite.
+ */
+function Suite(title, parentContext, isRoot) {
+  if (!utils.isString(title)) {
+    throw createInvalidArgumentTypeError(
+      'Suite argument "title" must be a string. Received type "' +
+        typeof title +
+        '"',
+      'title',
+      'string'
+    );
+  }
+  this.title = title;
+  function Context() {}
+  Context.prototype = parentContext;
+  this.ctx = new Context();
+  this.suites = [];
+  this.tests = [];
+  this.pending = false;
+  this._beforeEach = [];
+  this._beforeAll = [];
+  this._afterEach = [];
+  this._afterAll = [];
+  this.root = isRoot === true;
+  this._timeout = 2000;
+  this._enableTimeouts = true;
+  this._slow = 75;
+  this._bail = false;
+  this._retries = -1;
+  this._onlyTests = [];
+  this._onlySuites = [];
+  this.delayed = false;
+
+  this.on('newListener', function(event) {
+    if (deprecatedEvents[event]) {
+      utils.deprecate(
+        'Event "' +
+          event +
+          '" is deprecated.  Please let the Mocha team know about your use case: https://git.io/v6Lwm'
+      );
+    }
+  });
+}
+
+/**
+ * Inherit from `EventEmitter.prototype`.
+ */
+inherits(Suite, EventEmitter);
+
+/**
+ * Return a clone of this `Suite`.
+ *
+ * @private
+ * @return {Suite}
+ */
+Suite.prototype.clone = function() {
+  var suite = new Suite(this.title);
+  debug('clone');
+  suite.ctx = this.ctx;
+  suite.timeout(this.timeout());
+  suite.retries(this.retries());
+  suite.enableTimeouts(this.enableTimeouts());
+  suite.slow(this.slow());
+  suite.bail(this.bail());
+  return suite;
+};
+
+/**
+ * Set or get timeout `ms` or short-hand such as "2s".
+ *
+ * @private
+ * @param {number|string} ms
+ * @return {Suite|number} for chaining
+ */
+Suite.prototype.timeout = function(ms) {
+  if (!arguments.length) {
+    return this._timeout;
+  }
+  if (ms.toString() === '0') {
+    this._enableTimeouts = false;
+  }
+  if (typeof ms === 'string') {
+    ms = milliseconds(ms);
+  }
+  debug('timeout %d', ms);
+  this._timeout = parseInt(ms, 10);
+  return this;
+};
+
+/**
+ * Set or get number of times to retry a failed test.
+ *
+ * @private
+ * @param {number|string} n
+ * @return {Suite|number} for chaining
+ */
+Suite.prototype.retries = function(n) {
+  if (!arguments.length) {
+    return this._retries;
+  }
+  debug('retries %d', n);
+  this._retries = parseInt(n, 10) || 0;
+  return this;
+};
+
+/**
+ * Set or get timeout to `enabled`.
+ *
+ * @private
+ * @param {boolean} enabled
+ * @return {Suite|boolean} self or enabled
+ */
+Suite.prototype.enableTimeouts = function(enabled) {
+  if (!arguments.length) {
+    return this._enableTimeouts;
+  }
+  debug('enableTimeouts %s', enabled);
+  this._enableTimeouts = enabled;
+  return this;
+};
+
+/**
+ * Set or get slow `ms` or short-hand such as "2s".
+ *
+ * @private
+ * @param {number|string} ms
+ * @return {Suite|number} for chaining
+ */
+Suite.prototype.slow = function(ms) {
+  if (!arguments.length) {
+    return this._slow;
+  }
+  if (typeof ms === 'string') {
+    ms = milliseconds(ms);
+  }
+  debug('slow %d', ms);
+  this._slow = ms;
+  return this;
+};
+
+/**
+ * Set or get whether to bail after first error.
+ *
+ * @private
+ * @param {boolean} bail
+ * @return {Suite|number} for chaining
+ */
+Suite.prototype.bail = function(bail) {
+  if (!arguments.length) {
+    return this._bail;
+  }
+  debug('bail %s', bail);
+  this._bail = bail;
+  return this;
+};
+
+/**
+ * Check if this suite or its parent suite is marked as pending.
+ *
+ * @private
+ */
+Suite.prototype.isPending = function() {
+  return this.pending || (this.parent && this.parent.isPending());
+};
+
+/**
+ * Generic hook-creator.
+ * @private
+ * @param {string} title - Title of hook
+ * @param {Function} fn - Hook callback
+ * @returns {Hook} A new hook
+ */
+Suite.prototype._createHook = function(title, fn) {
+  var hook = new Hook(title, fn);
+  hook.parent = this;
+  hook.timeout(this.timeout());
+  hook.retries(this.retries());
+  hook.enableTimeouts(this.enableTimeouts());
+  hook.slow(this.slow());
+  hook.ctx = this.ctx;
+  hook.file = this.file;
+  return hook;
+};
+
+/**
+ * Run `fn(test[, done])` before running tests.
+ *
+ * @private
+ * @param {string} title
+ * @param {Function} fn
+ * @return {Suite} for chaining
+ */
+Suite.prototype.beforeAll = function(title, fn) {
+  if (this.isPending()) {
+    return this;
+  }
+  if (typeof title === 'function') {
+    fn = title;
+    title = fn.name;
+  }
+  title = '"before all" hook' + (title ? ': ' + title : '');
+
+  var hook = this._createHook(title, fn);
+  this._beforeAll.push(hook);
+  this.emit(constants.EVENT_SUITE_ADD_HOOK_BEFORE_ALL, hook);
+  return this;
+};
+
+/**
+ * Run `fn(test[, done])` after running tests.
+ *
+ * @private
+ * @param {string} title
+ * @param {Function} fn
+ * @return {Suite} for chaining
+ */
+Suite.prototype.afterAll = function(title, fn) {
+  if (this.isPending()) {
+    return this;
+  }
+  if (typeof title === 'function') {
+    fn = title;
+    title = fn.name;
+  }
+  title = '"after all" hook' + (title ? ': ' + title : '');
+
+  var hook = this._createHook(title, fn);
+  this._afterAll.push(hook);
+  this.emit(constants.EVENT_SUITE_ADD_HOOK_AFTER_ALL, hook);
+  return this;
+};
+
+/**
+ * Run `fn(test[, done])` before each test case.
+ *
+ * @private
+ * @param {string} title
+ * @param {Function} fn
+ * @return {Suite} for chaining
+ */
+Suite.prototype.beforeEach = function(title, fn) {
+  if (this.isPending()) {
+    return this;
+  }
+  if (typeof title === 'function') {
+    fn = title;
+    title = fn.name;
+  }
+  title = '"before each" hook' + (title ? ': ' + title : '');
+
+  var hook = this._createHook(title, fn);
+  this._beforeEach.push(hook);
+  this.emit(constants.EVENT_SUITE_ADD_HOOK_BEFORE_EACH, hook);
+  return this;
+};
+
+/**
+ * Run `fn(test[, done])` after each test case.
+ *
+ * @private
+ * @param {string} title
+ * @param {Function} fn
+ * @return {Suite} for chaining
+ */
+Suite.prototype.afterEach = function(title, fn) {
+  if (this.isPending()) {
+    return this;
+  }
+  if (typeof title === 'function') {
+    fn = title;
+    title = fn.name;
+  }
+  title = '"after each" hook' + (title ? ': ' + title : '');
+
+  var hook = this._createHook(title, fn);
+  this._afterEach.push(hook);
+  this.emit(constants.EVENT_SUITE_ADD_HOOK_AFTER_EACH, hook);
+  return this;
+};
+
+/**
+ * Add a test `suite`.
+ *
+ * @private
+ * @param {Suite} suite
+ * @return {Suite} for chaining
+ */
+Suite.prototype.addSuite = function(suite) {
+  suite.parent = this;
+  suite.root = false;
+  suite.timeout(this.timeout());
+  suite.retries(this.retries());
+  suite.enableTimeouts(this.enableTimeouts());
+  suite.slow(this.slow());
+  suite.bail(this.bail());
+  this.suites.push(suite);
+  this.emit(constants.EVENT_SUITE_ADD_SUITE, suite);
+  return this;
+};
+
+/**
+ * Add a `test` to this suite.
+ *
+ * @private
+ * @param {Test} test
+ * @return {Suite} for chaining
+ */
+Suite.prototype.addTest = function(test) {
+  test.parent = this;
+  test.timeout(this.timeout());
+  test.retries(this.retries());
+  test.enableTimeouts(this.enableTimeouts());
+  test.slow(this.slow());
+  test.ctx = this.ctx;
+  this.tests.push(test);
+  this.emit(constants.EVENT_SUITE_ADD_TEST, test);
+  return this;
+};
+
+/**
+ * Return the full title generated by recursively concatenating the parent's
+ * full title.
+ *
+ * @memberof Suite
+ * @public
+ * @return {string}
+ */
+Suite.prototype.fullTitle = function() {
+  return this.titlePath().join(' ');
+};
+
+/**
+ * Return the title path generated by recursively concatenating the parent's
+ * title path.
+ *
+ * @memberof Suite
+ * @public
+ * @return {string}
+ */
+Suite.prototype.titlePath = function() {
+  var result = [];
+  if (this.parent) {
+    result = result.concat(this.parent.titlePath());
+  }
+  if (!this.root) {
+    result.push(this.title);
+  }
+  return result;
+};
+
+/**
+ * Return the total number of tests.
+ *
+ * @memberof Suite
+ * @public
+ * @return {number}
+ */
+Suite.prototype.total = function() {
+  return (
+    this.suites.reduce(function(sum, suite) {
+      return sum + suite.total();
+    }, 0) + this.tests.length
+  );
+};
+
+/**
+ * Iterates through each suite recursively to find all tests. Applies a
+ * function in the format `fn(test)`.
+ *
+ * @private
+ * @param {Function} fn
+ * @return {Suite}
+ */
+Suite.prototype.eachTest = function(fn) {
+  this.tests.forEach(fn);
+  this.suites.forEach(function(suite) {
+    suite.eachTest(fn);
+  });
+  return this;
+};
+
+/**
+ * This will run the root suite if we happen to be running in delayed mode.
+ * @private
+ */
+Suite.prototype.run = function run() {
+  if (this.root) {
+    this.emit(constants.EVENT_ROOT_SUITE_RUN);
+  }
+};
+
+/**
+ * Determines whether a suite has an `only` test or suite as a descendant.
+ *
+ * @private
+ * @returns {Boolean}
+ */
+Suite.prototype.hasOnly = function hasOnly() {
+  return (
+    this._onlyTests.length > 0 ||
+    this._onlySuites.length > 0 ||
+    this.suites.some(function(suite) {
+      return suite.hasOnly();
+    })
+  );
+};
+
+/**
+ * Filter suites based on `isOnly` logic.
+ *
+ * @private
+ * @returns {Boolean}
+ */
+Suite.prototype.filterOnly = function filterOnly() {
+  if (this._onlyTests.length) {
+    // If the suite contains `only` tests, run those and ignore any nested suites.
+    this.tests = this._onlyTests;
+    this.suites = [];
+  } else {
+    // Otherwise, do not run any of the tests in this suite.
+    this.tests = [];
+    this._onlySuites.forEach(function(onlySuite) {
+      // If there are other `only` tests/suites nested in the current `only` suite, then filter that `only` suite.
+      // Otherwise, all of the tests on this `only` suite should be run, so don't filter it.
+      if (onlySuite.hasOnly()) {
+        onlySuite.filterOnly();
+      }
+    });
+    // Run the `only` suites, as well as any other suites that have `only` tests/suites as descendants.
+    var onlySuites = this._onlySuites;
+    this.suites = this.suites.filter(function(childSuite) {
+      return onlySuites.indexOf(childSuite) !== -1 || childSuite.filterOnly();
+    });
+  }
+  // Keep the suite only if there is something to run
+  return this.tests.length > 0 || this.suites.length > 0;
+};
+
+/**
+ * Adds a suite to the list of subsuites marked `only`.
+ *
+ * @private
+ * @param {Suite} suite
+ */
+Suite.prototype.appendOnlySuite = function(suite) {
+  this._onlySuites.push(suite);
+};
+
+/**
+ * Adds a test to the list of tests marked `only`.
+ *
+ * @private
+ * @param {Test} test
+ */
+Suite.prototype.appendOnlyTest = function(test) {
+  this._onlyTests.push(test);
+};
+
+/**
+ * Returns the array of hooks by hook name; see `HOOK_TYPE_*` constants.
+ * @private
+ */
+Suite.prototype.getHooks = function getHooks(name) {
+  return this['_' + name];
+};
+
+/**
+ * Cleans up the references to all the deferred functions
+ * (before/after/beforeEach/afterEach) and tests of a Suite.
+ * These must be deleted otherwise a memory leak can happen,
+ * as those functions may reference variables from closures,
+ * thus those variables can never be garbage collected as long
+ * as the deferred functions exist.
+ *
+ * @private
+ */
+Suite.prototype.cleanReferences = function cleanReferences() {
+  function cleanArrReferences(arr) {
+    for (var i = 0; i < arr.length; i++) {
+      delete arr[i].fn;
+    }
+  }
+
+  if (Array.isArray(this._beforeAll)) {
+    cleanArrReferences(this._beforeAll);
+  }
+
+  if (Array.isArray(this._beforeEach)) {
+    cleanArrReferences(this._beforeEach);
+  }
+
+  if (Array.isArray(this._afterAll)) {
+    cleanArrReferences(this._afterAll);
+  }
+
+  if (Array.isArray(this._afterEach)) {
+    cleanArrReferences(this._afterEach);
+  }
+
+  for (var i = 0; i < this.tests.length; i++) {
+    delete this.tests[i].fn;
+  }
+};
+
+var constants = utils.defineConstants(
+  /**
+   * {@link Suite}-related constants.
+   * @public
+   * @memberof Suite
+   * @alias constants
+   * @readonly
+   * @static
+   * @enum {string}
+   */
+  {
+    /**
+     * Event emitted after a test file has been loaded Not emitted in browser.
+     */
+    EVENT_FILE_POST_REQUIRE: 'post-require',
+    /**
+     * Event emitted before a test file has been loaded. In browser, this is emitted once an interface has been selected.
+     */
+    EVENT_FILE_PRE_REQUIRE: 'pre-require',
+    /**
+     * Event emitted immediately after a test file has been loaded. Not emitted in browser.
+     */
+    EVENT_FILE_REQUIRE: 'require',
+    /**
+     * Event emitted when `global.run()` is called (use with `delay` option)
+     */
+    EVENT_ROOT_SUITE_RUN: 'run',
+
+    /**
+     * Namespace for collection of a `Suite`'s "after all" hooks
+     */
+    HOOK_TYPE_AFTER_ALL: 'afterAll',
+    /**
+     * Namespace for collection of a `Suite`'s "after each" hooks
+     */
+    HOOK_TYPE_AFTER_EACH: 'afterEach',
+    /**
+     * Namespace for collection of a `Suite`'s "before all" hooks
+     */
+    HOOK_TYPE_BEFORE_ALL: 'beforeAll',
+    /**
+     * Namespace for collection of a `Suite`'s "before all" hooks
+     */
+    HOOK_TYPE_BEFORE_EACH: 'beforeEach',
+
+    // the following events are all deprecated
+
+    /**
+     * Emitted after an "after all" `Hook` has been added to a `Suite`. Deprecated
+     */
+    EVENT_SUITE_ADD_HOOK_AFTER_ALL: 'afterAll',
+    /**
+     * Emitted after an "after each" `Hook` has been added to a `Suite` Deprecated
+     */
+    EVENT_SUITE_ADD_HOOK_AFTER_EACH: 'afterEach',
+    /**
+     * Emitted after an "before all" `Hook` has been added to a `Suite` Deprecated
+     */
+    EVENT_SUITE_ADD_HOOK_BEFORE_ALL: 'beforeAll',
+    /**
+     * Emitted after an "before each" `Hook` has been added to a `Suite` Deprecated
+     */
+    EVENT_SUITE_ADD_HOOK_BEFORE_EACH: 'beforeEach',
+    /**
+     * Emitted after a child `Suite` has been added to a `Suite`. Deprecated
+     */
+    EVENT_SUITE_ADD_SUITE: 'suite',
+    /**
+     * Emitted after a `Test` has been added to a `Suite`. Deprecated
+     */
+    EVENT_SUITE_ADD_TEST: 'test'
+  }
+);
+
+/**
+ * @summary There are no known use cases for these events.
+ * @desc This is a `Set`-like object having all keys being the constant's string value and the value being `true`.
+ * @todo Remove eventually
+ * @type {Object<string,boolean>}
+ * @ignore
+ */
+var deprecatedEvents = Object.keys(constants)
+  .filter(function(constant) {
+    return constant.substring(0, 15) === 'EVENT_SUITE_ADD';
+  })
+  .reduce(function(acc, constant) {
+    acc[constants[constant]] = true;
+    return acc;
+  }, utils.createMap());
+
+Suite.constants = constants;
+
+},{"./errors":6,"./hook":7,"./utils":38,"debug":45,"events":50,"ms":60}],37:[function(require,module,exports){
+'use strict';
+var Runnable = require('./runnable');
+var utils = require('./utils');
+var errors = require('./errors');
+var createInvalidArgumentTypeError = errors.createInvalidArgumentTypeError;
+var isString = utils.isString;
+
+module.exports = Test;
+
+/**
+ * Initialize a new `Test` with the given `title` and callback `fn`.
+ *
+ * @public
+ * @class
+ * @extends Runnable
+ * @param {String} title - Test title (required)
+ * @param {Function} [fn] - Test callback.  If omitted, the Test is considered "pending"
+ */
+function Test(title, fn) {
+  if (!isString(title)) {
+    throw createInvalidArgumentTypeError(
+      'Test argument "title" should be a string. Received type "' +
+        typeof title +
+        '"',
+      'title',
+      'string'
+    );
+  }
+  Runnable.call(this, title, fn);
+  this.pending = !fn;
+  this.type = 'test';
+}
+
+/**
+ * Inherit from `Runnable.prototype`.
+ */
+utils.inherits(Test, Runnable);
+
+Test.prototype.clone = function() {
+  var test = new Test(this.title, this.fn);
+  test.timeout(this.timeout());
+  test.slow(this.slow());
+  test.enableTimeouts(this.enableTimeouts());
+  test.retries(this.retries());
+  test.currentRetry(this.currentRetry());
+  test.globals(this.globals());
+  test.parent = this.parent;
+  test.file = this.file;
+  test.ctx = this.ctx;
+  return test;
+};
+
+},{"./errors":6,"./runnable":33,"./utils":38}],38:[function(require,module,exports){
+(function (process,Buffer){
+'use strict';
+
+/**
+ * Various utility functions used throughout Mocha's codebase.
+ * @module utils
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var fs = require('fs');
+var path = require('path');
+var util = require('util');
+var glob = require('glob');
+var he = require('he');
+var errors = require('./errors');
+var createNoFilesMatchPatternError = errors.createNoFilesMatchPatternError;
+var createMissingArgumentError = errors.createMissingArgumentError;
+
+var assign = (exports.assign = require('object.assign').getPolyfill());
+
+/**
+ * Inherit the prototype methods from one constructor into another.
+ *
+ * @param {function} ctor - Constructor function which needs to inherit the
+ *     prototype.
+ * @param {function} superCtor - Constructor function to inherit prototype from.
+ * @throws {TypeError} if either constructor is null, or if super constructor
+ *     lacks a prototype.
+ */
+exports.inherits = util.inherits;
+
+/**
+ * Escape special characters in the given string of html.
+ *
+ * @private
+ * @param  {string} html
+ * @return {string}
+ */
+exports.escape = function(html) {
+  return he.encode(String(html), {useNamedReferences: false});
+};
+
+/**
+ * Test if the given obj is type of string.
+ *
+ * @private
+ * @param {Object} obj
+ * @return {boolean}
+ */
+exports.isString = function(obj) {
+  return typeof obj === 'string';
+};
+
+/**
+ * Watch the given `files` for changes
+ * and invoke `fn(file)` on modification.
+ *
+ * @private
+ * @param {Array} files
+ * @param {Function} fn
+ */
+exports.watch = function(files, fn) {
+  var options = {interval: 100};
+  var debug = require('debug')('mocha:watch');
+  files.forEach(function(file) {
+    debug('file %s', file);
+    fs.watchFile(file, options, function(curr, prev) {
+      if (prev.mtime < curr.mtime) {
+        fn(file);
+      }
+    });
+  });
+};
+
+/**
+ * Predicate to screen `pathname` for further consideration.
+ *
+ * @description
+ * Returns <code>false</code> for pathname referencing:
+ * <ul>
+ *   <li>'npm' package installation directory
+ *   <li>'git' version control directory
+ * </ul>
+ *
+ * @private
+ * @param {string} pathname - File or directory name to screen
+ * @return {boolean} whether pathname should be further considered
+ * @example
+ * ['node_modules', 'test.js'].filter(considerFurther); // => ['test.js']
+ */
+function considerFurther(pathname) {
+  var ignore = ['node_modules', '.git'];
+
+  return !~ignore.indexOf(pathname);
+}
+
+/**
+ * Lookup files in the given `dir`.
+ *
+ * @description
+ * Filenames are returned in _traversal_ order by the OS/filesystem.
+ * **Make no assumption that the names will be sorted in any fashion.**
+ *
+ * @private
+ * @param {string} dir
+ * @param {string[]} [exts=['js']]
+ * @param {Array} [ret=[]]
+ * @return {Array}
+ */
+exports.files = function(dir, exts, ret) {
+  ret = ret || [];
+  exts = exts || ['js'];
+
+  fs.readdirSync(dir)
+    .filter(considerFurther)
+    .forEach(function(dirent) {
+      var pathname = path.join(dir, dirent);
+      if (fs.lstatSync(pathname).isDirectory()) {
+        exports.files(pathname, exts, ret);
+      } else if (hasMatchingExtname(pathname, exts)) {
+        ret.push(pathname);
+      }
+    });
+
+  return ret;
+};
+
+/**
+ * Compute a slug from the given `str`.
+ *
+ * @private
+ * @param {string} str
+ * @return {string}
+ */
+exports.slug = function(str) {
+  return str
+    .toLowerCase()
+    .replace(/ +/g, '-')
+    .replace(/[^-\w]/g, '');
+};
+
+/**
+ * Strip the function definition from `str`, and re-indent for pre whitespace.
+ *
+ * @param {string} str
+ * @return {string}
+ */
+exports.clean = function(str) {
+  str = str
+    .replace(/\r\n?|[\n\u2028\u2029]/g, '\n')
+    .replace(/^\uFEFF/, '')
+    // (traditional)->  space/name     parameters    body     (lambda)-> parameters       body   multi-statement/single          keep body content
+    .replace(
+      /^function(?:\s*|\s+[^(]*)\([^)]*\)\s*\{((?:.|\n)*?)\s*\}$|^\([^)]*\)\s*=>\s*(?:\{((?:.|\n)*?)\s*\}|((?:.|\n)*))$/,
+      '$1$2$3'
+    );
+
+  var spaces = str.match(/^\n?( *)/)[1].length;
+  var tabs = str.match(/^\n?(\t*)/)[1].length;
+  var re = new RegExp(
+    '^\n?' + (tabs ? '\t' : ' ') + '{' + (tabs || spaces) + '}',
+    'gm'
+  );
+
+  str = str.replace(re, '');
+
+  return str.trim();
+};
+
+/**
+ * Parse the given `qs`.
+ *
+ * @private
+ * @param {string} qs
+ * @return {Object}
+ */
+exports.parseQuery = function(qs) {
+  return qs
+    .replace('?', '')
+    .split('&')
+    .reduce(function(obj, pair) {
+      var i = pair.indexOf('=');
+      var key = pair.slice(0, i);
+      var val = pair.slice(++i);
+
+      // Due to how the URLSearchParams API treats spaces
+      obj[key] = decodeURIComponent(val.replace(/\+/g, '%20'));
+
+      return obj;
+    }, {});
+};
+
+/**
+ * Highlight the given string of `js`.
+ *
+ * @private
+ * @param {string} js
+ * @return {string}
+ */
+function highlight(js) {
+  return js
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/\/\/(.*)/gm, '<span class="comment">//$1</span>')
+    .replace(/('.*?')/gm, '<span class="string">$1</span>')
+    .replace(/(\d+\.\d+)/gm, '<span class="number">$1</span>')
+    .replace(/(\d+)/gm, '<span class="number">$1</span>')
+    .replace(
+      /\bnew[ \t]+(\w+)/gm,
+      '<span class="keyword">new</span> <span class="init">$1</span>'
+    )
+    .replace(
+      /\b(function|new|throw|return|var|if|else)\b/gm,
+      '<span class="keyword">$1</span>'
+    );
+}
+
+/**
+ * Highlight the contents of tag `name`.
+ *
+ * @private
+ * @param {string} name
+ */
+exports.highlightTags = function(name) {
+  var code = document.getElementById('mocha').getElementsByTagName(name);
+  for (var i = 0, len = code.length; i < len; ++i) {
+    code[i].innerHTML = highlight(code[i].innerHTML);
+  }
+};
+
+/**
+ * If a value could have properties, and has none, this function is called,
+ * which returns a string representation of the empty value.
+ *
+ * Functions w/ no properties return `'[Function]'`
+ * Arrays w/ length === 0 return `'[]'`
+ * Objects w/ no properties return `'{}'`
+ * All else: return result of `value.toString()`
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @param {string} typeHint The type of the value
+ * @returns {string}
+ */
+function emptyRepresentation(value, typeHint) {
+  switch (typeHint) {
+    case 'function':
+      return '[Function]';
+    case 'object':
+      return '{}';
+    case 'array':
+      return '[]';
+    default:
+      return value.toString();
+  }
+}
+
+/**
+ * Takes some variable and asks `Object.prototype.toString()` what it thinks it
+ * is.
+ *
+ * @private
+ * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toString
+ * @param {*} value The value to test.
+ * @returns {string} Computed type
+ * @example
+ * type({}) // 'object'
+ * type([]) // 'array'
+ * type(1) // 'number'
+ * type(false) // 'boolean'
+ * type(Infinity) // 'number'
+ * type(null) // 'null'
+ * type(new Date()) // 'date'
+ * type(/foo/) // 'regexp'
+ * type('type') // 'string'
+ * type(global) // 'global'
+ * type(new String('foo') // 'object'
+ */
+var type = (exports.type = function type(value) {
+  if (value === undefined) {
+    return 'undefined';
+  } else if (value === null) {
+    return 'null';
+  } else if (Buffer.isBuffer(value)) {
+    return 'buffer';
+  }
+  return Object.prototype.toString
+    .call(value)
+    .replace(/^\[.+\s(.+?)]$/, '$1')
+    .toLowerCase();
+});
+
+/**
+ * Stringify `value`. Different behavior depending on type of value:
+ *
+ * - If `value` is undefined or null, return `'[undefined]'` or `'[null]'`, respectively.
+ * - If `value` is not an object, function or array, return result of `value.toString()` wrapped in double-quotes.
+ * - If `value` is an *empty* object, function, or array, return result of function
+ *   {@link emptyRepresentation}.
+ * - If `value` has properties, call {@link exports.canonicalize} on it, then return result of
+ *   JSON.stringify().
+ *
+ * @private
+ * @see exports.type
+ * @param {*} value
+ * @return {string}
+ */
+exports.stringify = function(value) {
+  var typeHint = type(value);
+
+  if (!~['object', 'array', 'function'].indexOf(typeHint)) {
+    if (typeHint === 'buffer') {
+      var json = Buffer.prototype.toJSON.call(value);
+      // Based on the toJSON result
+      return jsonStringify(
+        json.data && json.type ? json.data : json,
+        2
+      ).replace(/,(\n|$)/g, '$1');
+    }
+
+    // IE7/IE8 has a bizarre String constructor; needs to be coerced
+    // into an array and back to obj.
+    if (typeHint === 'string' && typeof value === 'object') {
+      value = value.split('').reduce(function(acc, char, idx) {
+        acc[idx] = char;
+        return acc;
+      }, {});
+      typeHint = 'object';
+    } else {
+      return jsonStringify(value);
+    }
+  }
+
+  for (var prop in value) {
+    if (Object.prototype.hasOwnProperty.call(value, prop)) {
+      return jsonStringify(
+        exports.canonicalize(value, null, typeHint),
+        2
+      ).replace(/,(\n|$)/g, '$1');
+    }
+  }
+
+  return emptyRepresentation(value, typeHint);
+};
+
+/**
+ * like JSON.stringify but more sense.
+ *
+ * @private
+ * @param {Object}  object
+ * @param {number=} spaces
+ * @param {number=} depth
+ * @returns {*}
+ */
+function jsonStringify(object, spaces, depth) {
+  if (typeof spaces === 'undefined') {
+    // primitive types
+    return _stringify(object);
+  }
+
+  depth = depth || 1;
+  var space = spaces * depth;
+  var str = Array.isArray(object) ? '[' : '{';
+  var end = Array.isArray(object) ? ']' : '}';
+  var length =
+    typeof object.length === 'number'
+      ? object.length
+      : Object.keys(object).length;
+  // `.repeat()` polyfill
+  function repeat(s, n) {
+    return new Array(n).join(s);
+  }
+
+  function _stringify(val) {
+    switch (type(val)) {
+      case 'null':
+      case 'undefined':
+        val = '[' + val + ']';
+        break;
+      case 'array':
+      case 'object':
+        val = jsonStringify(val, spaces, depth + 1);
+        break;
+      case 'boolean':
+      case 'regexp':
+      case 'symbol':
+      case 'number':
+        val =
+          val === 0 && 1 / val === -Infinity // `-0`
+            ? '-0'
+            : val.toString();
+        break;
+      case 'date':
+        var sDate = isNaN(val.getTime()) ? val.toString() : val.toISOString();
+        val = '[Date: ' + sDate + ']';
+        break;
+      case 'buffer':
+        var json = val.toJSON();
+        // Based on the toJSON result
+        json = json.data && json.type ? json.data : json;
+        val = '[Buffer: ' + jsonStringify(json, 2, depth + 1) + ']';
+        break;
+      default:
+        val =
+          val === '[Function]' || val === '[Circular]'
+            ? val
+            : JSON.stringify(val); // string
+    }
+    return val;
+  }
+
+  for (var i in object) {
+    if (!Object.prototype.hasOwnProperty.call(object, i)) {
+      continue; // not my business
+    }
+    --length;
+    str +=
+      '\n ' +
+      repeat(' ', space) +
+      (Array.isArray(object) ? '' : '"' + i + '": ') + // key
+      _stringify(object[i]) + // value
+      (length ? ',' : ''); // comma
+  }
+
+  return (
+    str +
+    // [], {}
+    (str.length !== 1 ? '\n' + repeat(' ', --space) + end : end)
+  );
+}
+
+/**
+ * Return a new Thing that has the keys in sorted order. Recursive.
+ *
+ * If the Thing...
+ * - has already been seen, return string `'[Circular]'`
+ * - is `undefined`, return string `'[undefined]'`
+ * - is `null`, return value `null`
+ * - is some other primitive, return the value
+ * - is not a primitive or an `Array`, `Object`, or `Function`, return the value of the Thing's `toString()` method
+ * - is a non-empty `Array`, `Object`, or `Function`, return the result of calling this function again.
+ * - is an empty `Array`, `Object`, or `Function`, return the result of calling `emptyRepresentation()`
+ *
+ * @private
+ * @see {@link exports.stringify}
+ * @param {*} value Thing to inspect.  May or may not have properties.
+ * @param {Array} [stack=[]] Stack of seen values
+ * @param {string} [typeHint] Type hint
+ * @return {(Object|Array|Function|string|undefined)}
+ */
+exports.canonicalize = function canonicalize(value, stack, typeHint) {
+  var canonicalizedObj;
+  /* eslint-disable no-unused-vars */
+  var prop;
+  /* eslint-enable no-unused-vars */
+  typeHint = typeHint || type(value);
+  function withStack(value, fn) {
+    stack.push(value);
+    fn();
+    stack.pop();
+  }
+
+  stack = stack || [];
+
+  if (stack.indexOf(value) !== -1) {
+    return '[Circular]';
+  }
+
+  switch (typeHint) {
+    case 'undefined':
+    case 'buffer':
+    case 'null':
+      canonicalizedObj = value;
+      break;
+    case 'array':
+      withStack(value, function() {
+        canonicalizedObj = value.map(function(item) {
+          return exports.canonicalize(item, stack);
+        });
+      });
+      break;
+    case 'function':
+      /* eslint-disable guard-for-in */
+      for (prop in value) {
+        canonicalizedObj = {};
+        break;
+      }
+      /* eslint-enable guard-for-in */
+      if (!canonicalizedObj) {
+        canonicalizedObj = emptyRepresentation(value, typeHint);
+        break;
+      }
+    /* falls through */
+    case 'object':
+      canonicalizedObj = canonicalizedObj || {};
+      withStack(value, function() {
+        Object.keys(value)
+          .sort()
+          .forEach(function(key) {
+            canonicalizedObj[key] = exports.canonicalize(value[key], stack);
+          });
+      });
+      break;
+    case 'date':
+    case 'number':
+    case 'regexp':
+    case 'boolean':
+    case 'symbol':
+      canonicalizedObj = value;
+      break;
+    default:
+      canonicalizedObj = value + '';
+  }
+
+  return canonicalizedObj;
+};
+
+/**
+ * Determines if pathname has a matching file extension.
+ *
+ * @private
+ * @param {string} pathname - Pathname to check for match.
+ * @param {string[]} exts - List of file extensions (sans period).
+ * @return {boolean} whether file extension matches.
+ * @example
+ * hasMatchingExtname('foo.html', ['js', 'css']); // => false
+ */
+function hasMatchingExtname(pathname, exts) {
+  var suffix = path.extname(pathname).slice(1);
+  return exts.some(function(element) {
+    return suffix === element;
+  });
+}
+
+/**
+ * Determines if pathname would be a "hidden" file (or directory) on UN*X.
+ *
+ * @description
+ * On UN*X, pathnames beginning with a full stop (aka dot) are hidden during
+ * typical usage. Dotfiles, plain-text configuration files, are prime examples.
+ *
+ * @see {@link http://xahlee.info/UnixResource_dir/writ/unix_origin_of_dot_filename.html|Origin of Dot File Names}
+ *
+ * @private
+ * @param {string} pathname - Pathname to check for match.
+ * @return {boolean} whether pathname would be considered a hidden file.
+ * @example
+ * isHiddenOnUnix('.profile'); // => true
+ */
+function isHiddenOnUnix(pathname) {
+  return path.basename(pathname)[0] === '.';
+}
+
+/**
+ * Lookup file names at the given `path`.
+ *
+ * @description
+ * Filenames are returned in _traversal_ order by the OS/filesystem.
+ * **Make no assumption that the names will be sorted in any fashion.**
+ *
+ * @public
+ * @memberof Mocha.utils
+ * @todo Fix extension handling
+ * @param {string} filepath - Base path to start searching from.
+ * @param {string[]} extensions - File extensions to look for.
+ * @param {boolean} recursive - Whether to recurse into subdirectories.
+ * @return {string[]} An array of paths.
+ * @throws {Error} if no files match pattern.
+ * @throws {TypeError} if `filepath` is directory and `extensions` not provided.
+ */
+exports.lookupFiles = function lookupFiles(filepath, extensions, recursive) {
+  var files = [];
+  var stat;
+
+  if (!fs.existsSync(filepath)) {
+    if (fs.existsSync(filepath + '.js')) {
+      filepath += '.js';
+    } else {
+      // Handle glob
+      files = glob.sync(filepath);
+      if (!files.length) {
+        throw createNoFilesMatchPatternError(
+          'Cannot find any files matching pattern ' + exports.dQuote(filepath),
+          filepath
+        );
+      }
+      return files;
+    }
+  }
+
+  // Handle file
+  try {
+    stat = fs.statSync(filepath);
+    if (stat.isFile()) {
+      return filepath;
+    }
+  } catch (err) {
+    // ignore error
+    return;
+  }
+
+  // Handle directory
+  fs.readdirSync(filepath).forEach(function(dirent) {
+    var pathname = path.join(filepath, dirent);
+    var stat;
+
+    try {
+      stat = fs.statSync(pathname);
+      if (stat.isDirectory()) {
+        if (recursive) {
+          files = files.concat(lookupFiles(pathname, extensions, recursive));
+        }
+        return;
+      }
+    } catch (err) {
+      // ignore error
+      return;
+    }
+    if (!extensions) {
+      throw createMissingArgumentError(
+        util.format(
+          'Argument %s required when argument %s is a directory',
+          exports.sQuote('extensions'),
+          exports.sQuote('filepath')
+        ),
+        'extensions',
+        'array'
+      );
+    }
+
+    if (
+      !stat.isFile() ||
+      !hasMatchingExtname(pathname, extensions) ||
+      isHiddenOnUnix(pathname)
+    ) {
+      return;
+    }
+    files.push(pathname);
+  });
+
+  return files;
+};
+
+/**
+ * process.emitWarning or a polyfill
+ * @see https://nodejs.org/api/process.html#process_process_emitwarning_warning_options
+ * @ignore
+ */
+function emitWarning(msg, type) {
+  if (process.emitWarning) {
+    process.emitWarning(msg, type);
+  } else {
+    process.nextTick(function() {
+      console.warn(type + ': ' + msg);
+    });
+  }
+}
+
+/**
+ * Show a deprecation warning. Each distinct message is only displayed once.
+ * Ignores empty messages.
+ *
+ * @param {string} [msg] - Warning to print
+ * @private
+ */
+exports.deprecate = function deprecate(msg) {
+  msg = String(msg);
+  if (msg && !deprecate.cache[msg]) {
+    deprecate.cache[msg] = true;
+    emitWarning(msg, 'DeprecationWarning');
+  }
+};
+exports.deprecate.cache = {};
+
+/**
+ * Show a generic warning.
+ * Ignores empty messages.
+ *
+ * @param {string} [msg] - Warning to print
+ * @private
+ */
+exports.warn = function warn(msg) {
+  if (msg) {
+    emitWarning(msg);
+  }
+};
+
+/**
+ * @summary
+ * This Filter based on `mocha-clean` module.(see: `github.com/rstacruz/mocha-clean`)
+ * @description
+ * When invoking this function you get a filter function that get the Error.stack as an input,
+ * and return a prettify output.
+ * (i.e: strip Mocha and internal node functions from stack trace).
+ * @returns {Function}
+ */
+exports.stackTraceFilter = function() {
+  // TODO: Replace with `process.browser`
+  var is = typeof document === 'undefined' ? {node: true} : {browser: true};
+  var slash = path.sep;
+  var cwd;
+  if (is.node) {
+    cwd = process.cwd() + slash;
+  } else {
+    cwd = (typeof location === 'undefined'
+      ? window.location
+      : location
+    ).href.replace(/\/[^/]*$/, '/');
+    slash = '/';
+  }
+
+  function isMochaInternal(line) {
+    return (
+      ~line.indexOf('node_modules' + slash + 'mocha' + slash) ||
+      ~line.indexOf(slash + 'mocha.js')
+    );
+  }
+
+  function isNodeInternal(line) {
+    return (
+      ~line.indexOf('(timers.js:') ||
+      ~line.indexOf('(events.js:') ||
+      ~line.indexOf('(node.js:') ||
+      ~line.indexOf('(module.js:') ||
+      ~line.indexOf('GeneratorFunctionPrototype.next (native)') ||
+      false
+    );
+  }
+
+  return function(stack) {
+    stack = stack.split('\n');
+
+    stack = stack.reduce(function(list, line) {
+      if (isMochaInternal(line)) {
+        return list;
+      }
+
+      if (is.node && isNodeInternal(line)) {
+        return list;
+      }
+
+      // Clean up cwd(absolute)
+      if (/:\d+:\d+\)?$/.test(line)) {
+        line = line.replace('(' + cwd, '(');
+      }
+
+      list.push(line);
+      return list;
+    }, []);
+
+    return stack.join('\n');
+  };
+};
+
+/**
+ * Crude, but effective.
+ * @public
+ * @param {*} value
+ * @returns {boolean} Whether or not `value` is a Promise
+ */
+exports.isPromise = function isPromise(value) {
+  return (
+    typeof value === 'object' &&
+    value !== null &&
+    typeof value.then === 'function'
+  );
+};
+
+/**
+ * Clamps a numeric value to an inclusive range.
+ *
+ * @param {number} value - Value to be clamped.
+ * @param {numer[]} range - Two element array specifying [min, max] range.
+ * @returns {number} clamped value
+ */
+exports.clamp = function clamp(value, range) {
+  return Math.min(Math.max(value, range[0]), range[1]);
+};
+
+/**
+ * Single quote text by combining with undirectional ASCII quotation marks.
+ *
+ * @description
+ * Provides a simple means of markup for quoting text to be used in output.
+ * Use this to quote names of variables, methods, and packages.
+ *
+ * <samp>package 'foo' cannot be found</samp>
+ *
+ * @private
+ * @param {string} str - Value to be quoted.
+ * @returns {string} quoted value
+ * @example
+ * sQuote('n') // => 'n'
+ */
+exports.sQuote = function(str) {
+  return "'" + str + "'";
+};
+
+/**
+ * Double quote text by combining with undirectional ASCII quotation marks.
+ *
+ * @description
+ * Provides a simple means of markup for quoting text to be used in output.
+ * Use this to quote names of datatypes, classes, pathnames, and strings.
+ *
+ * <samp>argument 'value' must be "string" or "number"</samp>
+ *
+ * @private
+ * @param {string} str - Value to be quoted.
+ * @returns {string} quoted value
+ * @example
+ * dQuote('number') // => "number"
+ */
+exports.dQuote = function(str) {
+  return '"' + str + '"';
+};
+
+/**
+ * Provides simplistic message translation for dealing with plurality.
+ *
+ * @description
+ * Use this to create messages which need to be singular or plural.
+ * Some languages have several plural forms, so _complete_ message clauses
+ * are preferable to generating the message on the fly.
+ *
+ * @private
+ * @param {number} n - Non-negative integer
+ * @param {string} msg1 - Message to be used in English for `n = 1`
+ * @param {string} msg2 - Message to be used in English for `n = 0, 2, 3, ...`
+ * @returns {string} message corresponding to value of `n`
+ * @example
+ * var sprintf = require('util').format;
+ * var pkgs = ['one', 'two'];
+ * var msg = sprintf(
+ *   ngettext(
+ *     pkgs.length,
+ *     'cannot load package: %s',
+ *     'cannot load packages: %s'
+ *   ),
+ *   pkgs.map(sQuote).join(', ')
+ * );
+ * console.log(msg); // => cannot load packages: 'one', 'two'
+ */
+exports.ngettext = function(n, msg1, msg2) {
+  if (typeof n === 'number' && n >= 0) {
+    return n === 1 ? msg1 : msg2;
+  }
+};
+
+/**
+ * It's a noop.
+ * @public
+ */
+exports.noop = function() {};
+
+/**
+ * Creates a map-like object.
+ *
+ * @description
+ * A "map" is an object with no prototype, for our purposes. In some cases
+ * this would be more appropriate than a `Map`, especially if your environment
+ * doesn't support it. Recommended for use in Mocha's public APIs.
+ *
+ * @public
+ * @see {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map|MDN:Map}
+ * @see {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/create#Custom_and_Null_objects|MDN:Object.create - Custom objects}
+ * @see {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign|MDN:Object.assign}
+ * @param {...*} [obj] - Arguments to `Object.assign()`.
+ * @returns {Object} An object with no prototype, having `...obj` properties
+ */
+exports.createMap = function(obj) {
+  return assign.apply(
+    null,
+    [Object.create(null)].concat(Array.prototype.slice.call(arguments))
+  );
+};
+
+/**
+ * Creates a read-only map-like object.
+ *
+ * @description
+ * This differs from {@link module:utils.createMap createMap} only in that
+ * the argument must be non-empty, because the result is frozen.
+ *
+ * @see {@link module:utils.createMap createMap}
+ * @param {...*} [obj] - Arguments to `Object.assign()`.
+ * @returns {Object} A frozen object with no prototype, having `...obj` properties
+ * @throws {TypeError} if argument is not a non-empty object.
+ */
+exports.defineConstants = function(obj) {
+  if (type(obj) !== 'object' || !Object.keys(obj).length) {
+    throw new TypeError('Invalid argument; expected a non-empty object');
+  }
+  return Object.freeze(exports.createMap(obj));
+};
+
+}).call(this,require('_process'),require("buffer").Buffer)
+},{"./errors":6,"_process":68,"buffer":43,"debug":45,"fs":42,"glob":42,"he":54,"object.assign":64,"path":42,"util":88}],39:[function(require,module,exports){
+'use strict'
+
+exports.byteLength = byteLength
+exports.toByteArray = toByteArray
+exports.fromByteArray = fromByteArray
+
+var lookup = []
+var revLookup = []
+var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
+
+var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+for (var i = 0, len = code.length; i < len; ++i) {
+  lookup[i] = code[i]
+  revLookup[code.charCodeAt(i)] = i
+}
+
+// Support decoding URL-safe base64 strings, as Node.js does.
+// See: https://en.wikipedia.org/wiki/Base64#URL_applications
+revLookup['-'.charCodeAt(0)] = 62
+revLookup['_'.charCodeAt(0)] = 63
+
+function getLens (b64) {
+  var len = b64.length
+
+  if (len % 4 > 0) {
+    throw new Error('Invalid string. Length must be a multiple of 4')
+  }
+
+  // Trim off extra bytes after placeholder bytes are found
+  // See: https://github.com/beatgammit/base64-js/issues/42
+  var validLen = b64.indexOf('=')
+  if (validLen === -1) validLen = len
+
+  var placeHoldersLen = validLen === len
+    ? 0
+    : 4 - (validLen % 4)
+
+  return [validLen, placeHoldersLen]
+}
+
+// base64 is 4/3 + up to two characters of the original data
+function byteLength (b64) {
+  var lens = getLens(b64)
+  var validLen = lens[0]
+  var placeHoldersLen = lens[1]
+  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function _byteLength (b64, validLen, placeHoldersLen) {
+  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function toByteArray (b64) {
+  var tmp
+  var lens = getLens(b64)
+  var validLen = lens[0]
+  var placeHoldersLen = lens[1]
+
+  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))
+
+  var curByte = 0
+
+  // if there are placeholders, only get up to the last complete 4 chars
+  var len = placeHoldersLen > 0
+    ? validLen - 4
+    : validLen
+
+  for (var i = 0; i < len; i += 4) {
+    tmp =
+      (revLookup[b64.charCodeAt(i)] << 18) |
+      (revLookup[b64.charCodeAt(i + 1)] << 12) |
+      (revLookup[b64.charCodeAt(i + 2)] << 6) |
+      revLookup[b64.charCodeAt(i + 3)]
+    arr[curByte++] = (tmp >> 16) & 0xFF
+    arr[curByte++] = (tmp >> 8) & 0xFF
+    arr[curByte++] = tmp & 0xFF
+  }
+
+  if (placeHoldersLen === 2) {
+    tmp =
+      (revLookup[b64.charCodeAt(i)] << 2) |
+      (revLookup[b64.charCodeAt(i + 1)] >> 4)
+    arr[curByte++] = tmp & 0xFF
+  }
+
+  if (placeHoldersLen === 1) {
+    tmp =
+      (revLookup[b64.charCodeAt(i)] << 10) |
+      (revLookup[b64.charCodeAt(i + 1)] << 4) |
+      (revLookup[b64.charCodeAt(i + 2)] >> 2)
+    arr[curByte++] = (tmp >> 8) & 0xFF
+    arr[curByte++] = tmp & 0xFF
+  }
+
+  return arr
+}
+
+function tripletToBase64 (num) {
+  return lookup[num >> 18 & 0x3F] +
+    lookup[num >> 12 & 0x3F] +
+    lookup[num >> 6 & 0x3F] +
+    lookup[num & 0x3F]
+}
+
+function encodeChunk (uint8, start, end) {
+  var tmp
+  var output = []
+  for (var i = start; i < end; i += 3) {
+    tmp =
+      ((uint8[i] << 16) & 0xFF0000) +
+      ((uint8[i + 1] << 8) & 0xFF00) +
+      (uint8[i + 2] & 0xFF)
+    output.push(tripletToBase64(tmp))
+  }
+  return output.join('')
+}
+
+function fromByteArray (uint8) {
+  var tmp
+  var len = uint8.length
+  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
+  var parts = []
+  var maxChunkLength = 16383 // must be multiple of 3
+
+  // go through the array every three bytes, we'll deal with trailing stuff later
+  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
+    parts.push(encodeChunk(
+      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)
+    ))
+  }
+
+  // pad the end with zeros, but make sure to not forget the extra bytes
+  if (extraBytes === 1) {
+    tmp = uint8[len - 1]
+    parts.push(
+      lookup[tmp >> 2] +
+      lookup[(tmp << 4) & 0x3F] +
+      '=='
+    )
+  } else if (extraBytes === 2) {
+    tmp = (uint8[len - 2] << 8) + uint8[len - 1]
+    parts.push(
+      lookup[tmp >> 10] +
+      lookup[(tmp >> 4) & 0x3F] +
+      lookup[(tmp << 2) & 0x3F] +
+      '='
+    )
+  }
+
+  return parts.join('')
+}
+
+},{}],40:[function(require,module,exports){
+
+},{}],41:[function(require,module,exports){
+(function (process){
+var WritableStream = require('stream').Writable
+var inherits = require('util').inherits
+
+module.exports = BrowserStdout
+
+
+inherits(BrowserStdout, WritableStream)
+
+function BrowserStdout(opts) {
+  if (!(this instanceof BrowserStdout)) return new BrowserStdout(opts)
+
+  opts = opts || {}
+  WritableStream.call(this, opts)
+  this.label = (opts.label !== undefined) ? opts.label : 'stdout'
+}
+
+BrowserStdout.prototype._write = function(chunks, encoding, cb) {
+  var output = chunks.toString ? chunks.toString() : chunks
+  if (this.label === false) {
+    console.log(output)
+  } else {
+    console.log(this.label+':', output)
+  }
+  process.nextTick(cb)
+}
+
+}).call(this,require('_process'))
+},{"_process":68,"stream":83,"util":88}],42:[function(require,module,exports){
+arguments[4][40][0].apply(exports,arguments)
+},{"dup":40}],43:[function(require,module,exports){
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <https://feross.org>
+ * @license  MIT
+ */
+/* eslint-disable no-proto */
+
+'use strict'
+
+var base64 = require('base64-js')
+var ieee754 = require('ieee754')
+
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
+
+var K_MAX_LENGTH = 0x7fffffff
+exports.kMaxLength = K_MAX_LENGTH
+
+/**
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Print warning and recommend using `buffer` v4.x which has an Object
+ *               implementation (most compatible, even IE6)
+ *
+ * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
+ * Opera 11.6+, iOS 4.2+.
+ *
+ * We report that the browser does not support typed arrays if the are not subclassable
+ * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
+ * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
+ * for __proto__ and has a buggy typed array implementation.
+ */
+Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
+
+if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
+    typeof console.error === 'function') {
+  console.error(
+    'This browser lacks typed array (Uint8Array) support which is required by ' +
+    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
+  )
+}
+
+function typedArraySupport () {
+  // Can typed array instances can be augmented?
+  try {
+    var arr = new Uint8Array(1)
+    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}
+    return arr.foo() === 42
+  } catch (e) {
+    return false
+  }
+}
+
+Object.defineProperty(Buffer.prototype, 'parent', {
+  get: function () {
+    if (!(this instanceof Buffer)) {
+      return undefined
+    }
+    return this.buffer
+  }
+})
+
+Object.defineProperty(Buffer.prototype, 'offset', {
+  get: function () {
+    if (!(this instanceof Buffer)) {
+      return undefined
+    }
+    return this.byteOffset
+  }
+})
+
+function createBuffer (length) {
+  if (length > K_MAX_LENGTH) {
+    throw new RangeError('Invalid typed array length')
+  }
+  // Return an augmented `Uint8Array` instance
+  var buf = new Uint8Array(length)
+  buf.__proto__ = Buffer.prototype
+  return buf
+}
+
+/**
+ * The Buffer constructor returns instances of `Uint8Array` that have their
+ * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
+ * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
+ * and the `Uint8Array` methods. Square bracket notation works as expected -- it
+ * returns a single octet.
+ *
+ * The `Uint8Array` prototype remains unmodified.
+ */
+
+function Buffer (arg, encodingOrOffset, length) {
+  // Common case.
+  if (typeof arg === 'number') {
+    if (typeof encodingOrOffset === 'string') {
+      throw new Error(
+        'If encoding is specified then the first argument must be a string'
+      )
+    }
+    return allocUnsafe(arg)
+  }
+  return from(arg, encodingOrOffset, length)
+}
+
+// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
+if (typeof Symbol !== 'undefined' && Symbol.species &&
+    Buffer[Symbol.species] === Buffer) {
+  Object.defineProperty(Buffer, Symbol.species, {
+    value: null,
+    configurable: true,
+    enumerable: false,
+    writable: false
+  })
+}
+
+Buffer.poolSize = 8192 // not used by this implementation
+
+function from (value, encodingOrOffset, length) {
+  if (typeof value === 'number') {
+    throw new TypeError('"value" argument must not be a number')
+  }
+
+  if (isArrayBuffer(value) || (value && isArrayBuffer(value.buffer))) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'string') {
+    return fromString(value, encodingOrOffset)
+  }
+
+  return fromObject(value)
+}
+
+/**
+ * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
+ * if value is a number.
+ * Buffer.from(str[, encoding])
+ * Buffer.from(array)
+ * Buffer.from(buffer)
+ * Buffer.from(arrayBuffer[, byteOffset[, length]])
+ **/
+Buffer.from = function (value, encodingOrOffset, length) {
+  return from(value, encodingOrOffset, length)
+}
+
+// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
+// https://github.com/feross/buffer/pull/148
+Buffer.prototype.__proto__ = Uint8Array.prototype
+Buffer.__proto__ = Uint8Array
+
+function assertSize (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('"size" argument must be of type number')
+  } else if (size < 0) {
+    throw new RangeError('"size" argument must not be negative')
+  }
+}
+
+function alloc (size, fill, encoding) {
+  assertSize(size)
+  if (size <= 0) {
+    return createBuffer(size)
+  }
+  if (fill !== undefined) {
+    // Only pay attention to encoding if it's a string. This
+    // prevents accidentally sending in a number that would
+    // be interpretted as a start offset.
+    return typeof encoding === 'string'
+      ? createBuffer(size).fill(fill, encoding)
+      : createBuffer(size).fill(fill)
+  }
+  return createBuffer(size)
+}
+
+/**
+ * Creates a new filled Buffer instance.
+ * alloc(size[, fill[, encoding]])
+ **/
+Buffer.alloc = function (size, fill, encoding) {
+  return alloc(size, fill, encoding)
+}
+
+function allocUnsafe (size) {
+  assertSize(size)
+  return createBuffer(size < 0 ? 0 : checked(size) | 0)
+}
+
+/**
+ * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
+ * */
+Buffer.allocUnsafe = function (size) {
+  return allocUnsafe(size)
+}
+/**
+ * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
+ */
+Buffer.allocUnsafeSlow = function (size) {
+  return allocUnsafe(size)
+}
+
+function fromString (string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
+  }
+
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('Unknown encoding: ' + encoding)
+  }
+
+  var length = byteLength(string, encoding) | 0
+  var buf = createBuffer(length)
+
+  var actual = buf.write(string, encoding)
+
+  if (actual !== length) {
+    // Writing a hex string, for example, that contains invalid characters will
+    // cause everything after the first invalid character to be ignored. (e.g.
+    // 'abxxcd' will be treated as 'ab')
+    buf = buf.slice(0, actual)
+  }
+
+  return buf
+}
+
+function fromArrayLike (array) {
+  var length = array.length < 0 ? 0 : checked(array.length) | 0
+  var buf = createBuffer(length)
+  for (var i = 0; i < length; i += 1) {
+    buf[i] = array[i] & 255
+  }
+  return buf
+}
+
+function fromArrayBuffer (array, byteOffset, length) {
+  if (byteOffset < 0 || array.byteLength < byteOffset) {
+    throw new RangeError('"offset" is outside of buffer bounds')
+  }
+
+  if (array.byteLength < byteOffset + (length || 0)) {
+    throw new RangeError('"length" is outside of buffer bounds')
+  }
+
+  var buf
+  if (byteOffset === undefined && length === undefined) {
+    buf = new Uint8Array(array)
+  } else if (length === undefined) {
+    buf = new Uint8Array(array, byteOffset)
+  } else {
+    buf = new Uint8Array(array, byteOffset, length)
+  }
+
+  // Return an augmented `Uint8Array` instance
+  buf.__proto__ = Buffer.prototype
+  return buf
+}
+
+function fromObject (obj) {
+  if (Buffer.isBuffer(obj)) {
+    var len = checked(obj.length) | 0
+    var buf = createBuffer(len)
+
+    if (buf.length === 0) {
+      return buf
+    }
+
+    obj.copy(buf, 0, 0, len)
+    return buf
+  }
+
+  if (obj) {
+    if (ArrayBuffer.isView(obj) || 'length' in obj) {
+      if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
+        return createBuffer(0)
+      }
+      return fromArrayLike(obj)
+    }
+
+    if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
+      return fromArrayLike(obj.data)
+    }
+  }
+
+  throw new TypeError('The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object.')
+}
+
+function checked (length) {
+  // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
+  // length is NaN (which is otherwise coerced to zero.)
+  if (length >= K_MAX_LENGTH) {
+    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+                         'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
+  }
+  return length | 0
+}
+
+function SlowBuffer (length) {
+  if (+length != length) { // eslint-disable-line eqeqeq
+    length = 0
+  }
+  return Buffer.alloc(+length)
+}
+
+Buffer.isBuffer = function isBuffer (b) {
+  return b != null && b._isBuffer === true
+}
+
+Buffer.compare = function compare (a, b) {
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    throw new TypeError('Arguments must be Buffers')
+  }
+
+  if (a === b) return 0
+
+  var x = a.length
+  var y = b.length
+
+  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
+    if (a[i] !== b[i]) {
+      x = a[i]
+      y = b[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+Buffer.isEncoding = function isEncoding (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'latin1':
+    case 'binary':
+    case 'base64':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
+}
+
+Buffer.concat = function concat (list, length) {
+  if (!Array.isArray(list)) {
+    throw new TypeError('"list" argument must be an Array of Buffers')
+  }
+
+  if (list.length === 0) {
+    return Buffer.alloc(0)
+  }
+
+  var i
+  if (length === undefined) {
+    length = 0
+    for (i = 0; i < list.length; ++i) {
+      length += list[i].length
+    }
+  }
+
+  var buffer = Buffer.allocUnsafe(length)
+  var pos = 0
+  for (i = 0; i < list.length; ++i) {
+    var buf = list[i]
+    if (ArrayBuffer.isView(buf)) {
+      buf = Buffer.from(buf)
+    }
+    if (!Buffer.isBuffer(buf)) {
+      throw new TypeError('"list" argument must be an Array of Buffers')
+    }
+    buf.copy(buffer, pos)
+    pos += buf.length
+  }
+  return buffer
+}
+
+function byteLength (string, encoding) {
+  if (Buffer.isBuffer(string)) {
+    return string.length
+  }
+  if (ArrayBuffer.isView(string) || isArrayBuffer(string)) {
+    return string.byteLength
+  }
+  if (typeof string !== 'string') {
+    string = '' + string
+  }
+
+  var len = string.length
+  if (len === 0) return 0
+
+  // Use a for loop to avoid recursion
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return len
+      case 'utf8':
+      case 'utf-8':
+      case undefined:
+        return utf8ToBytes(string).length
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return len * 2
+      case 'hex':
+        return len >>> 1
+      case 'base64':
+        return base64ToBytes(string).length
+      default:
+        if (loweredCase) return utf8ToBytes(string).length // assume utf8
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+Buffer.byteLength = byteLength
+
+function slowToString (encoding, start, end) {
+  var loweredCase = false
+
+  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
+  // property of a typed array.
+
+  // This behaves neither like String nor Uint8Array in that we set start/end
+  // to their upper/lower bounds if the value passed is out of range.
+  // undefined is handled specially as per ECMA-262 6th Edition,
+  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
+  if (start === undefined || start < 0) {
+    start = 0
+  }
+  // Return early if start > this.length. Done here to prevent potential uint32
+  // coercion fail below.
+  if (start > this.length) {
+    return ''
+  }
+
+  if (end === undefined || end > this.length) {
+    end = this.length
+  }
+
+  if (end <= 0) {
+    return ''
+  }
+
+  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
+  end >>>= 0
+  start >>>= 0
+
+  if (end <= start) {
+    return ''
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  while (true) {
+    switch (encoding) {
+      case 'hex':
+        return hexSlice(this, start, end)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Slice(this, start, end)
+
+      case 'ascii':
+        return asciiSlice(this, start, end)
+
+      case 'latin1':
+      case 'binary':
+        return latin1Slice(this, start, end)
+
+      case 'base64':
+        return base64Slice(this, start, end)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return utf16leSlice(this, start, end)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = (encoding + '').toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
+// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
+// reliably in a browserify context because there could be multiple different
+// copies of the 'buffer' package in use. This method works even for Buffer
+// instances that were created from another copy of the `buffer` package.
+// See: https://github.com/feross/buffer/issues/154
+Buffer.prototype._isBuffer = true
+
+function swap (b, n, m) {
+  var i = b[n]
+  b[n] = b[m]
+  b[m] = i
+}
+
+Buffer.prototype.swap16 = function swap16 () {
+  var len = this.length
+  if (len % 2 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 16-bits')
+  }
+  for (var i = 0; i < len; i += 2) {
+    swap(this, i, i + 1)
+  }
+  return this
+}
+
+Buffer.prototype.swap32 = function swap32 () {
+  var len = this.length
+  if (len % 4 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 32-bits')
+  }
+  for (var i = 0; i < len; i += 4) {
+    swap(this, i, i + 3)
+    swap(this, i + 1, i + 2)
+  }
+  return this
+}
+
+Buffer.prototype.swap64 = function swap64 () {
+  var len = this.length
+  if (len % 8 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 64-bits')
+  }
+  for (var i = 0; i < len; i += 8) {
+    swap(this, i, i + 7)
+    swap(this, i + 1, i + 6)
+    swap(this, i + 2, i + 5)
+    swap(this, i + 3, i + 4)
+  }
+  return this
+}
+
+Buffer.prototype.toString = function toString () {
+  var length = this.length
+  if (length === 0) return ''
+  if (arguments.length === 0) return utf8Slice(this, 0, length)
+  return slowToString.apply(this, arguments)
+}
+
+Buffer.prototype.toLocaleString = Buffer.prototype.toString
+
+Buffer.prototype.equals = function equals (b) {
+  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
+  if (this === b) return true
+  return Buffer.compare(this, b) === 0
+}
+
+Buffer.prototype.inspect = function inspect () {
+  var str = ''
+  var max = exports.INSPECT_MAX_BYTES
+  if (this.length > 0) {
+    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
+    if (this.length > max) str += ' ... '
+  }
+  return '<Buffer ' + str + '>'
+}
+
+Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
+  if (!Buffer.isBuffer(target)) {
+    throw new TypeError('Argument must be a Buffer')
+  }
+
+  if (start === undefined) {
+    start = 0
+  }
+  if (end === undefined) {
+    end = target ? target.length : 0
+  }
+  if (thisStart === undefined) {
+    thisStart = 0
+  }
+  if (thisEnd === undefined) {
+    thisEnd = this.length
+  }
+
+  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
+    throw new RangeError('out of range index')
+  }
+
+  if (thisStart >= thisEnd && start >= end) {
+    return 0
+  }
+  if (thisStart >= thisEnd) {
+    return -1
+  }
+  if (start >= end) {
+    return 1
+  }
+
+  start >>>= 0
+  end >>>= 0
+  thisStart >>>= 0
+  thisEnd >>>= 0
+
+  if (this === target) return 0
+
+  var x = thisEnd - thisStart
+  var y = end - start
+  var len = Math.min(x, y)
+
+  var thisCopy = this.slice(thisStart, thisEnd)
+  var targetCopy = target.slice(start, end)
+
+  for (var i = 0; i < len; ++i) {
+    if (thisCopy[i] !== targetCopy[i]) {
+      x = thisCopy[i]
+      y = targetCopy[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
+// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
+//
+// Arguments:
+// - buffer - a Buffer to search
+// - val - a string, Buffer, or number
+// - byteOffset - an index into `buffer`; will be clamped to an int32
+// - encoding - an optional encoding, relevant is val is a string
+// - dir - true for indexOf, false for lastIndexOf
+function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
+  // Empty buffer means no match
+  if (buffer.length === 0) return -1
+
+  // Normalize byteOffset
+  if (typeof byteOffset === 'string') {
+    encoding = byteOffset
+    byteOffset = 0
+  } else if (byteOffset > 0x7fffffff) {
+    byteOffset = 0x7fffffff
+  } else if (byteOffset < -0x80000000) {
+    byteOffset = -0x80000000
+  }
+  byteOffset = +byteOffset  // Coerce to Number.
+  if (numberIsNaN(byteOffset)) {
+    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
+    byteOffset = dir ? 0 : (buffer.length - 1)
+  }
+
+  // Normalize byteOffset: negative offsets start from the end of the buffer
+  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
+  if (byteOffset >= buffer.length) {
+    if (dir) return -1
+    else byteOffset = buffer.length - 1
+  } else if (byteOffset < 0) {
+    if (dir) byteOffset = 0
+    else return -1
+  }
+
+  // Normalize val
+  if (typeof val === 'string') {
+    val = Buffer.from(val, encoding)
+  }
+
+  // Finally, search either indexOf (if dir is true) or lastIndexOf
+  if (Buffer.isBuffer(val)) {
+    // Special case: looking for empty string/buffer always fails
+    if (val.length === 0) {
+      return -1
+    }
+    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
+  } else if (typeof val === 'number') {
+    val = val & 0xFF // Search for a byte value [0-255]
+    if (typeof Uint8Array.prototype.indexOf === 'function') {
+      if (dir) {
+        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
+      } else {
+        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
+      }
+    }
+    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
+  }
+
+  throw new TypeError('val must be string, number or Buffer')
+}
+
+function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
+  var indexSize = 1
+  var arrLength = arr.length
+  var valLength = val.length
+
+  if (encoding !== undefined) {
+    encoding = String(encoding).toLowerCase()
+    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
+        encoding === 'utf16le' || encoding === 'utf-16le') {
+      if (arr.length < 2 || val.length < 2) {
+        return -1
+      }
+      indexSize = 2
+      arrLength /= 2
+      valLength /= 2
+      byteOffset /= 2
+    }
+  }
+
+  function read (buf, i) {
+    if (indexSize === 1) {
+      return buf[i]
+    } else {
+      return buf.readUInt16BE(i * indexSize)
+    }
+  }
+
+  var i
+  if (dir) {
+    var foundIndex = -1
+    for (i = byteOffset; i < arrLength; i++) {
+      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
+        if (foundIndex === -1) foundIndex = i
+        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
+      } else {
+        if (foundIndex !== -1) i -= i - foundIndex
+        foundIndex = -1
+      }
+    }
+  } else {
+    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
+    for (i = byteOffset; i >= 0; i--) {
+      var found = true
+      for (var j = 0; j < valLength; j++) {
+        if (read(arr, i + j) !== read(val, j)) {
+          found = false
+          break
+        }
+      }
+      if (found) return i
+    }
+  }
+
+  return -1
+}
+
+Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
+  return this.indexOf(val, byteOffset, encoding) !== -1
+}
+
+Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
+}
+
+Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
+}
+
+function hexWrite (buf, string, offset, length) {
+  offset = Number(offset) || 0
+  var remaining = buf.length - offset
+  if (!length) {
+    length = remaining
+  } else {
+    length = Number(length)
+    if (length > remaining) {
+      length = remaining
+    }
+  }
+
+  var strLen = string.length
+
+  if (length > strLen / 2) {
+    length = strLen / 2
+  }
+  for (var i = 0; i < length; ++i) {
+    var parsed = parseInt(string.substr(i * 2, 2), 16)
+    if (numberIsNaN(parsed)) return i
+    buf[offset + i] = parsed
+  }
+  return i
+}
+
+function utf8Write (buf, string, offset, length) {
+  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+function asciiWrite (buf, string, offset, length) {
+  return blitBuffer(asciiToBytes(string), buf, offset, length)
+}
+
+function latin1Write (buf, string, offset, length) {
+  return asciiWrite(buf, string, offset, length)
+}
+
+function base64Write (buf, string, offset, length) {
+  return blitBuffer(base64ToBytes(string), buf, offset, length)
+}
+
+function ucs2Write (buf, string, offset, length) {
+  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+Buffer.prototype.write = function write (string, offset, length, encoding) {
+  // Buffer#write(string)
+  if (offset === undefined) {
+    encoding = 'utf8'
+    length = this.length
+    offset = 0
+  // Buffer#write(string, encoding)
+  } else if (length === undefined && typeof offset === 'string') {
+    encoding = offset
+    length = this.length
+    offset = 0
+  // Buffer#write(string, offset[, length][, encoding])
+  } else if (isFinite(offset)) {
+    offset = offset >>> 0
+    if (isFinite(length)) {
+      length = length >>> 0
+      if (encoding === undefined) encoding = 'utf8'
+    } else {
+      encoding = length
+      length = undefined
+    }
+  } else {
+    throw new Error(
+      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
+    )
+  }
+
+  var remaining = this.length - offset
+  if (length === undefined || length > remaining) length = remaining
+
+  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
+    throw new RangeError('Attempt to write outside buffer bounds')
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'hex':
+        return hexWrite(this, string, offset, length)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Write(this, string, offset, length)
+
+      case 'ascii':
+        return asciiWrite(this, string, offset, length)
+
+      case 'latin1':
+      case 'binary':
+        return latin1Write(this, string, offset, length)
+
+      case 'base64':
+        // Warning: maxLength not taken into account in base64Write
+        return base64Write(this, string, offset, length)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return ucs2Write(this, string, offset, length)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+Buffer.prototype.toJSON = function toJSON () {
+  return {
+    type: 'Buffer',
+    data: Array.prototype.slice.call(this._arr || this, 0)
+  }
+}
+
+function base64Slice (buf, start, end) {
+  if (start === 0 && end === buf.length) {
+    return base64.fromByteArray(buf)
+  } else {
+    return base64.fromByteArray(buf.slice(start, end))
+  }
+}
+
+function utf8Slice (buf, start, end) {
+  end = Math.min(buf.length, end)
+  var res = []
+
+  var i = start
+  while (i < end) {
+    var firstByte = buf[i]
+    var codePoint = null
+    var bytesPerSequence = (firstByte > 0xEF) ? 4
+      : (firstByte > 0xDF) ? 3
+      : (firstByte > 0xBF) ? 2
+      : 1
+
+    if (i + bytesPerSequence <= end) {
+      var secondByte, thirdByte, fourthByte, tempCodePoint
+
+      switch (bytesPerSequence) {
+        case 1:
+          if (firstByte < 0x80) {
+            codePoint = firstByte
+          }
+          break
+        case 2:
+          secondByte = buf[i + 1]
+          if ((secondByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
+            if (tempCodePoint > 0x7F) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 3:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
+            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 4:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          fourthByte = buf[i + 3]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
+            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
+              codePoint = tempCodePoint
+            }
+          }
+      }
+    }
+
+    if (codePoint === null) {
+      // we did not generate a valid codePoint so insert a
+      // replacement char (U+FFFD) and advance only 1 byte
+      codePoint = 0xFFFD
+      bytesPerSequence = 1
+    } else if (codePoint > 0xFFFF) {
+      // encode to utf16 (surrogate pair dance)
+      codePoint -= 0x10000
+      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
+      codePoint = 0xDC00 | codePoint & 0x3FF
+    }
+
+    res.push(codePoint)
+    i += bytesPerSequence
+  }
+
+  return decodeCodePointsArray(res)
+}
+
+// Based on http://stackoverflow.com/a/22747272/680742, the browser with
+// the lowest limit is Chrome, with 0x10000 args.
+// We go 1 magnitude less, for safety
+var MAX_ARGUMENTS_LENGTH = 0x1000
+
+function decodeCodePointsArray (codePoints) {
+  var len = codePoints.length
+  if (len <= MAX_ARGUMENTS_LENGTH) {
+    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
+  }
+
+  // Decode in chunks to avoid "call stack size exceeded".
+  var res = ''
+  var i = 0
+  while (i < len) {
+    res += String.fromCharCode.apply(
+      String,
+      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
+    )
+  }
+  return res
+}
+
+function asciiSlice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i] & 0x7F)
+  }
+  return ret
+}
+
+function latin1Slice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i])
+  }
+  return ret
+}
+
+function hexSlice (buf, start, end) {
+  var len = buf.length
+
+  if (!start || start < 0) start = 0
+  if (!end || end < 0 || end > len) end = len
+
+  var out = ''
+  for (var i = start; i < end; ++i) {
+    out += toHex(buf[i])
+  }
+  return out
+}
+
+function utf16leSlice (buf, start, end) {
+  var bytes = buf.slice(start, end)
+  var res = ''
+  for (var i = 0; i < bytes.length; i += 2) {
+    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
+  }
+  return res
+}
+
+Buffer.prototype.slice = function slice (start, end) {
+  var len = this.length
+  start = ~~start
+  end = end === undefined ? len : ~~end
+
+  if (start < 0) {
+    start += len
+    if (start < 0) start = 0
+  } else if (start > len) {
+    start = len
+  }
+
+  if (end < 0) {
+    end += len
+    if (end < 0) end = 0
+  } else if (end > len) {
+    end = len
+  }
+
+  if (end < start) end = start
+
+  var newBuf = this.subarray(start, end)
+  // Return an augmented `Uint8Array` instance
+  newBuf.__proto__ = Buffer.prototype
+  return newBuf
+}
+
+/*
+ * Need to make sure that buffer isn't trying to write out of bounds.
+ */
+function checkOffset (offset, ext, length) {
+  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
+  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
+}
+
+Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    checkOffset(offset, byteLength, this.length)
+  }
+
+  var val = this[offset + --byteLength]
+  var mul = 1
+  while (byteLength > 0 && (mul *= 0x100)) {
+    val += this[offset + --byteLength] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  return this[offset]
+}
+
+Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return this[offset] | (this[offset + 1] << 8)
+}
+
+Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return (this[offset] << 8) | this[offset + 1]
+}
+
+Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return ((this[offset]) |
+      (this[offset + 1] << 8) |
+      (this[offset + 2] << 16)) +
+      (this[offset + 3] * 0x1000000)
+}
+
+Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] * 0x1000000) +
+    ((this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    this[offset + 3])
+}
+
+Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var i = byteLength
+  var mul = 1
+  var val = this[offset + --i]
+  while (i > 0 && (mul *= 0x100)) {
+    val += this[offset + --i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  if (!(this[offset] & 0x80)) return (this[offset])
+  return ((0xff - this[offset] + 1) * -1)
+}
+
+Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset] | (this[offset + 1] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset + 1] | (this[offset] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset]) |
+    (this[offset + 1] << 8) |
+    (this[offset + 2] << 16) |
+    (this[offset + 3] << 24)
+}
+
+Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] << 24) |
+    (this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    (this[offset + 3])
+}
+
+Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, true, 23, 4)
+}
+
+Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, false, 23, 4)
+}
+
+Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, true, 52, 8)
+}
+
+Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, false, 52, 8)
+}
+
+function checkInt (buf, value, offset, ext, max, min) {
+  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
+  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+}
+
+Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    var maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  var mul = 1
+  var i = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    var maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  var i = byteLength - 1
+  var mul = 1
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset + 3] = (value >>> 24)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 1] = (value >>> 8)
+  this[offset] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    var limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  var i = 0
+  var mul = 1
+  var sub = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    var limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  var i = byteLength - 1
+  var mul = 1
+  var sub = 0
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
+  if (value < 0) value = 0xff + value + 1
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 3] = (value >>> 24)
+  return offset + 4
+}
+
+Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  if (value < 0) value = 0xffffffff + value + 1
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+function checkIEEE754 (buf, value, offset, ext, max, min) {
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+  if (offset < 0) throw new RangeError('Index out of range')
+}
+
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
+
+Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
+
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
+}
+
+Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
+}
+
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function copy (target, targetStart, start, end) {
+  if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (targetStart >= target.length) targetStart = target.length
+  if (!targetStart) targetStart = 0
+  if (end > 0 && end < start) end = start
+
+  // Copy 0 bytes; we're done
+  if (end === start) return 0
+  if (target.length === 0 || this.length === 0) return 0
+
+  // Fatal error conditions
+  if (targetStart < 0) {
+    throw new RangeError('targetStart out of bounds')
+  }
+  if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
+  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+
+  // Are we oob?
+  if (end > this.length) end = this.length
+  if (target.length - targetStart < end - start) {
+    end = target.length - targetStart + start
+  }
+
+  var len = end - start
+
+  if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
+    // Use built-in when available, missing from IE11
+    this.copyWithin(targetStart, start, end)
+  } else if (this === target && start < targetStart && targetStart < end) {
+    // descending copy from end
+    for (var i = len - 1; i >= 0; --i) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else {
+    Uint8Array.prototype.set.call(
+      target,
+      this.subarray(start, end),
+      targetStart
+    )
+  }
+
+  return len
+}
+
+// Usage:
+//    buffer.fill(number[, offset[, end]])
+//    buffer.fill(buffer[, offset[, end]])
+//    buffer.fill(string[, offset[, end]][, encoding])
+Buffer.prototype.fill = function fill (val, start, end, encoding) {
+  // Handle string cases:
+  if (typeof val === 'string') {
+    if (typeof start === 'string') {
+      encoding = start
+      start = 0
+      end = this.length
+    } else if (typeof end === 'string') {
+      encoding = end
+      end = this.length
+    }
+    if (encoding !== undefined && typeof encoding !== 'string') {
+      throw new TypeError('encoding must be a string')
+    }
+    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
+      throw new TypeError('Unknown encoding: ' + encoding)
+    }
+    if (val.length === 1) {
+      var code = val.charCodeAt(0)
+      if ((encoding === 'utf8' && code < 128) ||
+          encoding === 'latin1') {
+        // Fast path: If `val` fits into a single byte, use that numeric value.
+        val = code
+      }
+    }
+  } else if (typeof val === 'number') {
+    val = val & 255
+  }
+
+  // Invalid ranges are not set to a default, so can range check early.
+  if (start < 0 || this.length < start || this.length < end) {
+    throw new RangeError('Out of range index')
+  }
+
+  if (end <= start) {
+    return this
+  }
+
+  start = start >>> 0
+  end = end === undefined ? this.length : end >>> 0
+
+  if (!val) val = 0
+
+  var i
+  if (typeof val === 'number') {
+    for (i = start; i < end; ++i) {
+      this[i] = val
+    }
+  } else {
+    var bytes = Buffer.isBuffer(val)
+      ? val
+      : new Buffer(val, encoding)
+    var len = bytes.length
+    if (len === 0) {
+      throw new TypeError('The value "' + val +
+        '" is invalid for argument "value"')
+    }
+    for (i = 0; i < end - start; ++i) {
+      this[i + start] = bytes[i % len]
+    }
+  }
+
+  return this
+}
+
+// HELPER FUNCTIONS
+// ================
+
+var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g
+
+function base64clean (str) {
+  // Node takes equal signs as end of the Base64 encoding
+  str = str.split('=')[0]
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = str.trim().replace(INVALID_BASE64_RE, '')
+  // Node converts strings with length < 2 to ''
+  if (str.length < 2) return ''
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
+  }
+  return str
+}
+
+function toHex (n) {
+  if (n < 16) return '0' + n.toString(16)
+  return n.toString(16)
+}
+
+function utf8ToBytes (string, units) {
+  units = units || Infinity
+  var codePoint
+  var length = string.length
+  var leadSurrogate = null
+  var bytes = []
+
+  for (var i = 0; i < length; ++i) {
+    codePoint = string.charCodeAt(i)
+
+    // is surrogate component
+    if (codePoint > 0xD7FF && codePoint < 0xE000) {
+      // last char was a lead
+      if (!leadSurrogate) {
+        // no lead yet
+        if (codePoint > 0xDBFF) {
+          // unexpected trail
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        } else if (i + 1 === length) {
+          // unpaired lead
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        }
+
+        // valid lead
+        leadSurrogate = codePoint
+
+        continue
+      }
+
+      // 2 leads in a row
+      if (codePoint < 0xDC00) {
+        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+        leadSurrogate = codePoint
+        continue
+      }
+
+      // valid surrogate pair
+      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
+    } else if (leadSurrogate) {
+      // valid bmp char, but last char was a lead
+      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+    }
+
+    leadSurrogate = null
+
+    // encode utf8
+    if (codePoint < 0x80) {
+      if ((units -= 1) < 0) break
+      bytes.push(codePoint)
+    } else if (codePoint < 0x800) {
+      if ((units -= 2) < 0) break
+      bytes.push(
+        codePoint >> 0x6 | 0xC0,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x10000) {
+      if ((units -= 3) < 0) break
+      bytes.push(
+        codePoint >> 0xC | 0xE0,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x110000) {
+      if ((units -= 4) < 0) break
+      bytes.push(
+        codePoint >> 0x12 | 0xF0,
+        codePoint >> 0xC & 0x3F | 0x80,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else {
+      throw new Error('Invalid code point')
+    }
+  }
+
+  return bytes
+}
+
+function asciiToBytes (str) {
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
+  }
+  return byteArray
+}
+
+function utf16leToBytes (str, units) {
+  var c, hi, lo
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    if ((units -= 2) < 0) break
+
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
+  }
+
+  return byteArray
+}
+
+function base64ToBytes (str) {
+  return base64.toByteArray(base64clean(str))
+}
+
+function blitBuffer (src, dst, offset, length) {
+  for (var i = 0; i < length; ++i) {
+    if ((i + offset >= dst.length) || (i >= src.length)) break
+    dst[i + offset] = src[i]
+  }
+  return i
+}
+
+// ArrayBuffers from another context (i.e. an iframe) do not pass the `instanceof` check
+// but they should be treated as valid. See: https://github.com/feross/buffer/issues/166
+function isArrayBuffer (obj) {
+  return obj instanceof ArrayBuffer ||
+    (obj != null && obj.constructor != null && obj.constructor.name === 'ArrayBuffer' &&
+      typeof obj.byteLength === 'number')
+}
+
+function numberIsNaN (obj) {
+  return obj !== obj // eslint-disable-line no-self-compare
+}
+
+},{"base64-js":39,"ieee754":55}],44:[function(require,module,exports){
+(function (Buffer){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// NOTE: These type checking functions intentionally don't use `instanceof`
+// because it is fragile and can be easily faked with `Object.create()`.
+
+function isArray(arg) {
+  if (Array.isArray) {
+    return Array.isArray(arg);
+  }
+  return objectToString(arg) === '[object Array]';
+}
+exports.isArray = isArray;
+
+function isBoolean(arg) {
+  return typeof arg === 'boolean';
+}
+exports.isBoolean = isBoolean;
+
+function isNull(arg) {
+  return arg === null;
+}
+exports.isNull = isNull;
+
+function isNullOrUndefined(arg) {
+  return arg == null;
+}
+exports.isNullOrUndefined = isNullOrUndefined;
+
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+exports.isNumber = isNumber;
+
+function isString(arg) {
+  return typeof arg === 'string';
+}
+exports.isString = isString;
+
+function isSymbol(arg) {
+  return typeof arg === 'symbol';
+}
+exports.isSymbol = isSymbol;
+
+function isUndefined(arg) {
+  return arg === void 0;
+}
+exports.isUndefined = isUndefined;
+
+function isRegExp(re) {
+  return objectToString(re) === '[object RegExp]';
+}
+exports.isRegExp = isRegExp;
+
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
+}
+exports.isObject = isObject;
+
+function isDate(d) {
+  return objectToString(d) === '[object Date]';
+}
+exports.isDate = isDate;
+
+function isError(e) {
+  return (objectToString(e) === '[object Error]' || e instanceof Error);
+}
+exports.isError = isError;
+
+function isFunction(arg) {
+  return typeof arg === 'function';
+}
+exports.isFunction = isFunction;
+
+function isPrimitive(arg) {
+  return arg === null ||
+         typeof arg === 'boolean' ||
+         typeof arg === 'number' ||
+         typeof arg === 'string' ||
+         typeof arg === 'symbol' ||  // ES6 symbol
+         typeof arg === 'undefined';
+}
+exports.isPrimitive = isPrimitive;
+
+exports.isBuffer = Buffer.isBuffer;
+
+function objectToString(o) {
+  return Object.prototype.toString.call(o);
+}
+
+}).call(this,{"isBuffer":require("../../is-buffer/index.js")})
+},{"../../is-buffer/index.js":57}],45:[function(require,module,exports){
+(function (process){
+"use strict";
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+/* eslint-env browser */
+
+/**
+ * This is the web browser implementation of `debug()`.
+ */
+exports.log = log;
+exports.formatArgs = formatArgs;
+exports.save = save;
+exports.load = load;
+exports.useColors = useColors;
+exports.storage = localstorage();
+/**
+ * Colors.
+ */
+
+exports.colors = ['#0000CC', '#0000FF', '#0033CC', '#0033FF', '#0066CC', '#0066FF', '#0099CC', '#0099FF', '#00CC00', '#00CC33', '#00CC66', '#00CC99', '#00CCCC', '#00CCFF', '#3300CC', '#3300FF', '#3333CC', '#3333FF', '#3366CC', '#3366FF', '#3399CC', '#3399FF', '#33CC00', '#33CC33', '#33CC66', '#33CC99', '#33CCCC', '#33CCFF', '#6600CC', '#6600FF', '#6633CC', '#6633FF', '#66CC00', '#66CC33', '#9900CC', '#9900FF', '#9933CC', '#9933FF', '#99CC00', '#99CC33', '#CC0000', '#CC0033', '#CC0066', '#CC0099', '#CC00CC', '#CC00FF', '#CC3300', '#CC3333', '#CC3366', '#CC3399', '#CC33CC', '#CC33FF', '#CC6600', '#CC6633', '#CC9900', '#CC9933', '#CCCC00', '#CCCC33', '#FF0000', '#FF0033', '#FF0066', '#FF0099', '#FF00CC', '#FF00FF', '#FF3300', '#FF3333', '#FF3366', '#FF3399', '#FF33CC', '#FF33FF', '#FF6600', '#FF6633', '#FF9900', '#FF9933', '#FFCC00', '#FFCC33'];
+/**
+ * Currently only WebKit-based Web Inspectors, Firefox >= v31,
+ * and the Firebug extension (any Firefox version) are known
+ * to support "%c" CSS customizations.
+ *
+ * TODO: add a `localStorage` variable to explicitly enable/disable colors
+ */
+// eslint-disable-next-line complexity
+
+function useColors() {
+  // NB: In an Electron preload script, document will be defined but not fully
+  // initialized. Since we know we're in Chrome, we'll just detect this case
+  // explicitly
+  if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {
+    return true;
+  } // Internet Explorer and Edge do not support colors.
+
+
+  if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
+    return false;
+  } // Is webkit? http://stackoverflow.com/a/16459606/376773
+  // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
+
+
+  return typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance || // Is firebug? http://stackoverflow.com/a/398120/376773
+  typeof window !== 'undefined' && window.console && (window.console.firebug || window.console.exception && window.console.table) || // Is firefox >= v31?
+  // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
+  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31 || // Double check webkit in userAgent just in case we are in a worker
+  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/);
+}
+/**
+ * Colorize log arguments if enabled.
+ *
+ * @api public
+ */
+
+
+function formatArgs(args) {
+  args[0] = (this.useColors ? '%c' : '') + this.namespace + (this.useColors ? ' %c' : ' ') + args[0] + (this.useColors ? '%c ' : ' ') + '+' + module.exports.humanize(this.diff);
+
+  if (!this.useColors) {
+    return;
+  }
+
+  var c = 'color: ' + this.color;
+  args.splice(1, 0, c, 'color: inherit'); // The final "%c" is somewhat tricky, because there could be other
+  // arguments passed either before or after the %c, so we need to
+  // figure out the correct index to insert the CSS into
+
+  var index = 0;
+  var lastC = 0;
+  args[0].replace(/%[a-zA-Z%]/g, function (match) {
+    if (match === '%%') {
+      return;
+    }
+
+    index++;
+
+    if (match === '%c') {
+      // We only are interested in the *last* %c
+      // (the user may have provided their own)
+      lastC = index;
+    }
+  });
+  args.splice(lastC, 0, c);
+}
+/**
+ * Invokes `console.log()` when available.
+ * No-op when `console.log` is not a "function".
+ *
+ * @api public
+ */
+
+
+function log() {
+  var _console;
+
+  // This hackery is required for IE8/9, where
+  // the `console.log` function doesn't have 'apply'
+  return (typeof console === "undefined" ? "undefined" : _typeof(console)) === 'object' && console.log && (_console = console).log.apply(_console, arguments);
+}
+/**
+ * Save `namespaces`.
+ *
+ * @param {String} namespaces
+ * @api private
+ */
+
+
+function save(namespaces) {
+  try {
+    if (namespaces) {
+      exports.storage.setItem('debug', namespaces);
+    } else {
+      exports.storage.removeItem('debug');
+    }
+  } catch (error) {// Swallow
+    // XXX (@Qix-) should we be logging these?
+  }
+}
+/**
+ * Load `namespaces`.
+ *
+ * @return {String} returns the previously persisted debug modes
+ * @api private
+ */
+
+
+function load() {
+  var r;
+
+  try {
+    r = exports.storage.getItem('debug');
+  } catch (error) {} // Swallow
+  // XXX (@Qix-) should we be logging these?
+  // If debug isn't set in LS, and we're in Electron, try to load $DEBUG
+
+
+  if (!r && typeof process !== 'undefined' && 'env' in process) {
+    r = process.env.DEBUG;
+  }
+
+  return r;
+}
+/**
+ * Localstorage attempts to return the localstorage.
+ *
+ * This is necessary because safari throws
+ * when a user disables cookies/localstorage
+ * and you attempt to access it.
+ *
+ * @return {LocalStorage}
+ * @api private
+ */
+
+
+function localstorage() {
+  try {
+    // TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context
+    // The Browser also has localStorage in the global context.
+    return localStorage;
+  } catch (error) {// Swallow
+    // XXX (@Qix-) should we be logging these?
+  }
+}
+
+module.exports = require('./common')(exports);
+var formatters = module.exports.formatters;
+/**
+ * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
+ */
+
+formatters.j = function (v) {
+  try {
+    return JSON.stringify(v);
+  } catch (error) {
+    return '[UnexpectedJSONParseError]: ' + error.message;
+  }
+};
+
+
+}).call(this,require('_process'))
+},{"./common":46,"_process":68}],46:[function(require,module,exports){
+"use strict";
+
+/**
+ * This is the common logic for both the Node.js and web browser
+ * implementations of `debug()`.
+ */
+function setup(env) {
+  createDebug.debug = createDebug;
+  createDebug.default = createDebug;
+  createDebug.coerce = coerce;
+  createDebug.disable = disable;
+  createDebug.enable = enable;
+  createDebug.enabled = enabled;
+  createDebug.humanize = require('ms');
+  Object.keys(env).forEach(function (key) {
+    createDebug[key] = env[key];
+  });
+  /**
+  * Active `debug` instances.
+  */
+
+  createDebug.instances = [];
+  /**
+  * The currently active debug mode names, and names to skip.
+  */
+
+  createDebug.names = [];
+  createDebug.skips = [];
+  /**
+  * Map of special "%n" handling functions, for the debug "format" argument.
+  *
+  * Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".
+  */
+
+  createDebug.formatters = {};
+  /**
+  * Selects a color for a debug namespace
+  * @param {String} namespace The namespace string for the for the debug instance to be colored
+  * @return {Number|String} An ANSI color code for the given namespace
+  * @api private
+  */
+
+  function selectColor(namespace) {
+    var hash = 0;
+
+    for (var i = 0; i < namespace.length; i++) {
+      hash = (hash << 5) - hash + namespace.charCodeAt(i);
+      hash |= 0; // Convert to 32bit integer
+    }
+
+    return createDebug.colors[Math.abs(hash) % createDebug.colors.length];
+  }
+
+  createDebug.selectColor = selectColor;
+  /**
+  * Create a debugger with the given `namespace`.
+  *
+  * @param {String} namespace
+  * @return {Function}
+  * @api public
+  */
+
+  function createDebug(namespace) {
+    var prevTime;
+
+    function debug() {
+      // Disabled?
+      if (!debug.enabled) {
+        return;
+      }
+
+      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+        args[_key] = arguments[_key];
+      }
+
+      var self = debug; // Set `diff` timestamp
+
+      var curr = Number(new Date());
+      var ms = curr - (prevTime || curr);
+      self.diff = ms;
+      self.prev = prevTime;
+      self.curr = curr;
+      prevTime = curr;
+      args[0] = createDebug.coerce(args[0]);
+
+      if (typeof args[0] !== 'string') {
+        // Anything else let's inspect with %O
+        args.unshift('%O');
+      } // Apply any `formatters` transformations
+
+
+      var index = 0;
+      args[0] = args[0].replace(/%([a-zA-Z%])/g, function (match, format) {
+        // If we encounter an escaped % then don't increase the array index
+        if (match === '%%') {
+          return match;
+        }
+
+        index++;
+        var formatter = createDebug.formatters[format];
+
+        if (typeof formatter === 'function') {
+          var val = args[index];
+          match = formatter.call(self, val); // Now we need to remove `args[index]` since it's inlined in the `format`
+
+          args.splice(index, 1);
+          index--;
+        }
+
+        return match;
+      }); // Apply env-specific formatting (colors, etc.)
+
+      createDebug.formatArgs.call(self, args);
+      var logFn = self.log || createDebug.log;
+      logFn.apply(self, args);
+    }
+
+    debug.namespace = namespace;
+    debug.enabled = createDebug.enabled(namespace);
+    debug.useColors = createDebug.useColors();
+    debug.color = selectColor(namespace);
+    debug.destroy = destroy;
+    debug.extend = extend; // Debug.formatArgs = formatArgs;
+    // debug.rawLog = rawLog;
+    // env-specific initialization logic for debug instances
+
+    if (typeof createDebug.init === 'function') {
+      createDebug.init(debug);
+    }
+
+    createDebug.instances.push(debug);
+    return debug;
+  }
+
+  function destroy() {
+    var index = createDebug.instances.indexOf(this);
+
+    if (index !== -1) {
+      createDebug.instances.splice(index, 1);
+      return true;
+    }
+
+    return false;
+  }
+
+  function extend(namespace, delimiter) {
+    return createDebug(this.namespace + (typeof delimiter === 'undefined' ? ':' : delimiter) + namespace);
+  }
+  /**
+  * Enables a debug mode by namespaces. This can include modes
+  * separated by a colon and wildcards.
+  *
+  * @param {String} namespaces
+  * @api public
+  */
+
+
+  function enable(namespaces) {
+    createDebug.save(namespaces);
+    createDebug.names = [];
+    createDebug.skips = [];
+    var i;
+    var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\s,]+/);
+    var len = split.length;
+
+    for (i = 0; i < len; i++) {
+      if (!split[i]) {
+        // ignore empty strings
+        continue;
+      }
+
+      namespaces = split[i].replace(/\*/g, '.*?');
+
+      if (namespaces[0] === '-') {
+        createDebug.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
+      } else {
+        createDebug.names.push(new RegExp('^' + namespaces + '$'));
+      }
+    }
+
+    for (i = 0; i < createDebug.instances.length; i++) {
+      var instance = createDebug.instances[i];
+      instance.enabled = createDebug.enabled(instance.namespace);
+    }
+  }
+  /**
+  * Disable debug output.
+  *
+  * @api public
+  */
+
+
+  function disable() {
+    createDebug.enable('');
+  }
+  /**
+  * Returns true if the given mode name is enabled, false otherwise.
+  *
+  * @param {String} name
+  * @return {Boolean}
+  * @api public
+  */
+
+
+  function enabled(name) {
+    if (name[name.length - 1] === '*') {
+      return true;
+    }
+
+    var i;
+    var len;
+
+    for (i = 0, len = createDebug.skips.length; i < len; i++) {
+      if (createDebug.skips[i].test(name)) {
+        return false;
+      }
+    }
+
+    for (i = 0, len = createDebug.names.length; i < len; i++) {
+      if (createDebug.names[i].test(name)) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+  /**
+  * Coerce `val`.
+  *
+  * @param {Mixed} val
+  * @return {Mixed}
+  * @api private
+  */
+
+
+  function coerce(val) {
+    if (val instanceof Error) {
+      return val.stack || val.message;
+    }
+
+    return val;
+  }
+
+  createDebug.enable(createDebug.load());
+  return createDebug;
+}
+
+module.exports = setup;
+
+
+},{"ms":60}],47:[function(require,module,exports){
+'use strict';
+
+var keys = require('object-keys');
+var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
+
+var toStr = Object.prototype.toString;
+var concat = Array.prototype.concat;
+var origDefineProperty = Object.defineProperty;
+
+var isFunction = function (fn) {
+	return typeof fn === 'function' && toStr.call(fn) === '[object Function]';
+};
+
+var arePropertyDescriptorsSupported = function () {
+	var obj = {};
+	try {
+		origDefineProperty(obj, 'x', { enumerable: false, value: obj });
+		// eslint-disable-next-line no-unused-vars, no-restricted-syntax
+		for (var _ in obj) { // jscs:ignore disallowUnusedVariables
+			return false;
+		}
+		return obj.x === obj;
+	} catch (e) { /* this is IE 8. */
+		return false;
+	}
+};
+var supportsDescriptors = origDefineProperty && arePropertyDescriptorsSupported();
+
+var defineProperty = function (object, name, value, predicate) {
+	if (name in object && (!isFunction(predicate) || !predicate())) {
+		return;
+	}
+	if (supportsDescriptors) {
+		origDefineProperty(object, name, {
+			configurable: true,
+			enumerable: false,
+			value: value,
+			writable: true
+		});
+	} else {
+		object[name] = value;
+	}
+};
+
+var defineProperties = function (object, map) {
+	var predicates = arguments.length > 2 ? arguments[2] : {};
+	var props = keys(map);
+	if (hasSymbols) {
+		props = concat.call(props, Object.getOwnPropertySymbols(map));
+	}
+	for (var i = 0; i < props.length; i += 1) {
+		defineProperty(object, props[i], map[props[i]], predicates[props[i]]);
+	}
+};
+
+defineProperties.supportsDescriptors = !!supportsDescriptors;
+
+module.exports = defineProperties;
+
+},{"object-keys":61}],48:[function(require,module,exports){
+/*!
+
+ diff v3.5.0
+
+Software License Agreement (BSD License)
+
+Copyright (c) 2009-2015, Kevin Decker <kpdecker@gmail.com>
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of Kevin Decker nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+@license
+*/
+(function webpackUniversalModuleDefinition(root, factory) {
+	if(typeof exports === 'object' && typeof module === 'object')
+		module.exports = factory();
+	else if(false)
+		define([], factory);
+	else if(typeof exports === 'object')
+		exports["JsDiff"] = factory();
+	else
+		root["JsDiff"] = factory();
+})(this, function() {
+return /******/ (function(modules) { // webpackBootstrap
+/******/ 	// The module cache
+/******/ 	var installedModules = {};
+
+/******/ 	// The require function
+/******/ 	function __webpack_require__(moduleId) {
+
+/******/ 		// Check if module is in cache
+/******/ 		if(installedModules[moduleId])
+/******/ 			return installedModules[moduleId].exports;
+
+/******/ 		// Create a new module (and put it into the cache)
+/******/ 		var module = installedModules[moduleId] = {
+/******/ 			exports: {},
+/******/ 			id: moduleId,
+/******/ 			loaded: false
+/******/ 		};
+
+/******/ 		// Execute the module function
+/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+
+/******/ 		// Flag the module as loaded
+/******/ 		module.loaded = true;
+
+/******/ 		// Return the exports of the module
+/******/ 		return module.exports;
+/******/ 	}
+
+
+/******/ 	// expose the modules object (__webpack_modules__)
+/******/ 	__webpack_require__.m = modules;
+
+/******/ 	// expose the module cache
+/******/ 	__webpack_require__.c = installedModules;
+
+/******/ 	// __webpack_public_path__
+/******/ 	__webpack_require__.p = "";
+
+/******/ 	// Load entry module and return exports
+/******/ 	return __webpack_require__(0);
+/******/ })
+/************************************************************************/
+/******/ ([
+/* 0 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports.canonicalize = exports.convertChangesToXML = exports.convertChangesToDMP = exports.merge = exports.parsePatch = exports.applyPatches = exports.applyPatch = exports.createPatch = exports.createTwoFilesPatch = exports.structuredPatch = exports.diffArrays = exports.diffJson = exports.diffCss = exports.diffSentences = exports.diffTrimmedLines = exports.diffLines = exports.diffWordsWithSpace = exports.diffWords = exports.diffChars = exports.Diff = undefined;
+
+	/*istanbul ignore end*/var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/var _base2 = _interopRequireDefault(_base);
+
+	/*istanbul ignore end*/var /*istanbul ignore start*/_character = __webpack_require__(2) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_word = __webpack_require__(3) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_line = __webpack_require__(5) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_sentence = __webpack_require__(6) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_css = __webpack_require__(7) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_json = __webpack_require__(8) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_array = __webpack_require__(9) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_apply = __webpack_require__(10) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_parse = __webpack_require__(11) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_merge = __webpack_require__(13) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_create = __webpack_require__(14) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_dmp = __webpack_require__(16) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_xml = __webpack_require__(17) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+	/* See LICENSE file for terms of use */
+
+	/*
+	 * Text diff implementation.
+	 *
+	 * This library supports the following APIS:
+	 * JsDiff.diffChars: Character by character diff
+	 * JsDiff.diffWords: Word (as defined by \b regex) diff which ignores whitespace
+	 * JsDiff.diffLines: Line based diff
+	 *
+	 * JsDiff.diffCss: Diff targeted at CSS content
+	 *
+	 * These methods are based on the implementation proposed in
+	 * "An O(ND) Difference Algorithm and its Variations" (Myers, 1986).
+	 * http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.4.6927
+	 */
+	exports. /*istanbul ignore end*/Diff = _base2['default'];
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffChars = _character.diffChars;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffWords = _word.diffWords;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffWordsWithSpace = _word.diffWordsWithSpace;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffLines = _line.diffLines;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffTrimmedLines = _line.diffTrimmedLines;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffSentences = _sentence.diffSentences;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffCss = _css.diffCss;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffJson = _json.diffJson;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffArrays = _array.diffArrays;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/structuredPatch = _create.structuredPatch;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/createTwoFilesPatch = _create.createTwoFilesPatch;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/createPatch = _create.createPatch;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/applyPatch = _apply.applyPatch;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/applyPatches = _apply.applyPatches;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/parsePatch = _parse.parsePatch;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/merge = _merge.merge;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/convertChangesToDMP = _dmp.convertChangesToDMP;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/convertChangesToXML = _xml.convertChangesToXML;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/canonicalize = _json.canonicalize;
+
+
+
+/***/ }),
+/* 1 */
+/***/ (function(module, exports) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports['default'] = /*istanbul ignore end*/Diff;
+	function Diff() {}
+
+	Diff.prototype = {
+	  /*istanbul ignore start*/ /*istanbul ignore end*/diff: function diff(oldString, newString) {
+	    /*istanbul ignore start*/var /*istanbul ignore end*/options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+
+	    var callback = options.callback;
+	    if (typeof options === 'function') {
+	      callback = options;
+	      options = {};
+	    }
+	    this.options = options;
+
+	    var self = this;
+
+	    function done(value) {
+	      if (callback) {
+	        setTimeout(function () {
+	          callback(undefined, value);
+	        }, 0);
+	        return true;
+	      } else {
+	        return value;
+	      }
+	    }
+
+	    // Allow subclasses to massage the input prior to running
+	    oldString = this.castInput(oldString);
+	    newString = this.castInput(newString);
+
+	    oldString = this.removeEmpty(this.tokenize(oldString));
+	    newString = this.removeEmpty(this.tokenize(newString));
+
+	    var newLen = newString.length,
+	        oldLen = oldString.length;
+	    var editLength = 1;
+	    var maxEditLength = newLen + oldLen;
+	    var bestPath = [{ newPos: -1, components: [] }];
+
+	    // Seed editLength = 0, i.e. the content starts with the same values
+	    var oldPos = this.extractCommon(bestPath[0], newString, oldString, 0);
+	    if (bestPath[0].newPos + 1 >= newLen && oldPos + 1 >= oldLen) {
+	      // Identity per the equality and tokenizer
+	      return done([{ value: this.join(newString), count: newString.length }]);
+	    }
+
+	    // Main worker method. checks all permutations of a given edit length for acceptance.
+	    function execEditLength() {
+	      for (var diagonalPath = -1 * editLength; diagonalPath <= editLength; diagonalPath += 2) {
+	        var basePath = /*istanbul ignore start*/void 0 /*istanbul ignore end*/;
+	        var addPath = bestPath[diagonalPath - 1],
+	            removePath = bestPath[diagonalPath + 1],
+	            _oldPos = (removePath ? removePath.newPos : 0) - diagonalPath;
+	        if (addPath) {
+	          // No one else is going to attempt to use this value, clear it
+	          bestPath[diagonalPath - 1] = undefined;
+	        }
+
+	        var canAdd = addPath && addPath.newPos + 1 < newLen,
+	            canRemove = removePath && 0 <= _oldPos && _oldPos < oldLen;
+	        if (!canAdd && !canRemove) {
+	          // If this path is a terminal then prune
+	          bestPath[diagonalPath] = undefined;
+	          continue;
+	        }
+
+	        // Select the diagonal that we want to branch from. We select the prior
+	        // path whose position in the new string is the farthest from the origin
+	        // and does not pass the bounds of the diff graph
+	        if (!canAdd || canRemove && addPath.newPos < removePath.newPos) {
+	          basePath = clonePath(removePath);
+	          self.pushComponent(basePath.components, undefined, true);
+	        } else {
+	          basePath = addPath; // No need to clone, we've pulled it from the list
+	          basePath.newPos++;
+	          self.pushComponent(basePath.components, true, undefined);
+	        }
+
+	        _oldPos = self.extractCommon(basePath, newString, oldString, diagonalPath);
+
+	        // If we have hit the end of both strings, then we are done
+	        if (basePath.newPos + 1 >= newLen && _oldPos + 1 >= oldLen) {
+	          return done(buildValues(self, basePath.components, newString, oldString, self.useLongestToken));
+	        } else {
+	          // Otherwise track this path as a potential candidate and continue.
+	          bestPath[diagonalPath] = basePath;
+	        }
+	      }
+
+	      editLength++;
+	    }
+
+	    // Performs the length of edit iteration. Is a bit fugly as this has to support the
+	    // sync and async mode which is never fun. Loops over execEditLength until a value
+	    // is produced.
+	    if (callback) {
+	      (function exec() {
+	        setTimeout(function () {
+	          // This should not happen, but we want to be safe.
+	          /* istanbul ignore next */
+	          if (editLength > maxEditLength) {
+	            return callback();
+	          }
+
+	          if (!execEditLength()) {
+	            exec();
+	          }
+	        }, 0);
+	      })();
+	    } else {
+	      while (editLength <= maxEditLength) {
+	        var ret = execEditLength();
+	        if (ret) {
+	          return ret;
+	        }
+	      }
+	    }
+	  },
+	  /*istanbul ignore start*/ /*istanbul ignore end*/pushComponent: function pushComponent(components, added, removed) {
+	    var last = components[components.length - 1];
+	    if (last && last.added === added && last.removed === removed) {
+	      // We need to clone here as the component clone operation is just
+	      // as shallow array clone
+	      components[components.length - 1] = { count: last.count + 1, added: added, removed: removed };
+	    } else {
+	      components.push({ count: 1, added: added, removed: removed });
+	    }
+	  },
+	  /*istanbul ignore start*/ /*istanbul ignore end*/extractCommon: function extractCommon(basePath, newString, oldString, diagonalPath) {
+	    var newLen = newString.length,
+	        oldLen = oldString.length,
+	        newPos = basePath.newPos,
+	        oldPos = newPos - diagonalPath,
+	        commonCount = 0;
+	    while (newPos + 1 < newLen && oldPos + 1 < oldLen && this.equals(newString[newPos + 1], oldString[oldPos + 1])) {
+	      newPos++;
+	      oldPos++;
+	      commonCount++;
+	    }
+
+	    if (commonCount) {
+	      basePath.components.push({ count: commonCount });
+	    }
+
+	    basePath.newPos = newPos;
+	    return oldPos;
+	  },
+	  /*istanbul ignore start*/ /*istanbul ignore end*/equals: function equals(left, right) {
+	    if (this.options.comparator) {
+	      return this.options.comparator(left, right);
+	    } else {
+	      return left === right || this.options.ignoreCase && left.toLowerCase() === right.toLowerCase();
+	    }
+	  },
+	  /*istanbul ignore start*/ /*istanbul ignore end*/removeEmpty: function removeEmpty(array) {
+	    var ret = [];
+	    for (var i = 0; i < array.length; i++) {
+	      if (array[i]) {
+	        ret.push(array[i]);
+	      }
+	    }
+	    return ret;
+	  },
+	  /*istanbul ignore start*/ /*istanbul ignore end*/castInput: function castInput(value) {
+	    return value;
+	  },
+	  /*istanbul ignore start*/ /*istanbul ignore end*/tokenize: function tokenize(value) {
+	    return value.split('');
+	  },
+	  /*istanbul ignore start*/ /*istanbul ignore end*/join: function join(chars) {
+	    return chars.join('');
+	  }
+	};
+
+	function buildValues(diff, components, newString, oldString, useLongestToken) {
+	  var componentPos = 0,
+	      componentLen = components.length,
+	      newPos = 0,
+	      oldPos = 0;
+
+	  for (; componentPos < componentLen; componentPos++) {
+	    var component = components[componentPos];
+	    if (!component.removed) {
+	      if (!component.added && useLongestToken) {
+	        var value = newString.slice(newPos, newPos + component.count);
+	        value = value.map(function (value, i) {
+	          var oldValue = oldString[oldPos + i];
+	          return oldValue.length > value.length ? oldValue : value;
+	        });
+
+	        component.value = diff.join(value);
+	      } else {
+	        component.value = diff.join(newString.slice(newPos, newPos + component.count));
+	      }
+	      newPos += component.count;
+
+	      // Common case
+	      if (!component.added) {
+	        oldPos += component.count;
+	      }
+	    } else {
+	      component.value = diff.join(oldString.slice(oldPos, oldPos + component.count));
+	      oldPos += component.count;
+
+	      // Reverse add and remove so removes are output first to match common convention
+	      // The diffing algorithm is tied to add then remove output and this is the simplest
+	      // route to get the desired output with minimal overhead.
+	      if (componentPos && components[componentPos - 1].added) {
+	        var tmp = components[componentPos - 1];
+	        components[componentPos - 1] = components[componentPos];
+	        components[componentPos] = tmp;
+	      }
+	    }
+	  }
+
+	  // Special case handle for when one terminal is ignored (i.e. whitespace).
+	  // For this case we merge the terminal into the prior string and drop the change.
+	  // This is only available for string mode.
+	  var lastComponent = components[componentLen - 1];
+	  if (componentLen > 1 && typeof lastComponent.value === 'string' && (lastComponent.added || lastComponent.removed) && diff.equals('', lastComponent.value)) {
+	    components[componentLen - 2].value += lastComponent.value;
+	    components.pop();
+	  }
+
+	  return components;
+	}
+
+	function clonePath(path) {
+	  return { newPos: path.newPos, components: path.components.slice(0) };
+	}
+
+
+
+/***/ }),
+/* 2 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports.characterDiff = undefined;
+	exports. /*istanbul ignore end*/diffChars = diffChars;
+
+	var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/var _base2 = _interopRequireDefault(_base);
+
+	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+	/*istanbul ignore end*/var characterDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/characterDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/();
+	function diffChars(oldStr, newStr, options) {
+	  return characterDiff.diff(oldStr, newStr, options);
+	}
+
+
+
+/***/ }),
+/* 3 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports.wordDiff = undefined;
+	exports. /*istanbul ignore end*/diffWords = diffWords;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffWordsWithSpace = diffWordsWithSpace;
+
+	var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/var _base2 = _interopRequireDefault(_base);
+
+	/*istanbul ignore end*/var /*istanbul ignore start*/_params = __webpack_require__(4) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+	/*istanbul ignore end*/ // Based on https://en.wikipedia.org/wiki/Latin_script_in_Unicode
+	//
+	// Ranges and exceptions:
+	// Latin-1 Supplement, 0080–00FF
+	//  - U+00D7  × Multiplication sign
+	//  - U+00F7  ÷ Division sign
+	// Latin Extended-A, 0100–017F
+	// Latin Extended-B, 0180–024F
+	// IPA Extensions, 0250–02AF
+	// Spacing Modifier Letters, 02B0–02FF
+	//  - U+02C7  ˇ &#711;  Caron
+	//  - U+02D8  ˘ &#728;  Breve
+	//  - U+02D9  ˙ &#729;  Dot Above
+	//  - U+02DA  ˚ &#730;  Ring Above
+	//  - U+02DB  ˛ &#731;  Ogonek
+	//  - U+02DC  ˜ &#732;  Small Tilde
+	//  - U+02DD  ˝ &#733;  Double Acute Accent
+	// Latin Extended Additional, 1E00–1EFF
+	var extendedWordChars = /^[A-Za-z\xC0-\u02C6\u02C8-\u02D7\u02DE-\u02FF\u1E00-\u1EFF]+$/;
+
+	var reWhitespace = /\S/;
+
+	var wordDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/wordDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/();
+	wordDiff.equals = function (left, right) {
+	  if (this.options.ignoreCase) {
+	    left = left.toLowerCase();
+	    right = right.toLowerCase();
+	  }
+	  return left === right || this.options.ignoreWhitespace && !reWhitespace.test(left) && !reWhitespace.test(right);
+	};
+	wordDiff.tokenize = function (value) {
+	  var tokens = value.split(/(\s+|\b)/);
+
+	  // Join the boundary splits that we do not consider to be boundaries. This is primarily the extended Latin character set.
+	  for (var i = 0; i < tokens.length - 1; i++) {
+	    // If we have an empty string in the next field and we have only word chars before and after, merge
+	    if (!tokens[i + 1] && tokens[i + 2] && extendedWordChars.test(tokens[i]) && extendedWordChars.test(tokens[i + 2])) {
+	      tokens[i] += tokens[i + 2];
+	      tokens.splice(i + 1, 2);
+	      i--;
+	    }
+	  }
+
+	  return tokens;
+	};
+
+	function diffWords(oldStr, newStr, options) {
+	  options = /*istanbul ignore start*/(0, _params.generateOptions) /*istanbul ignore end*/(options, { ignoreWhitespace: true });
+	  return wordDiff.diff(oldStr, newStr, options);
+	}
+
+	function diffWordsWithSpace(oldStr, newStr, options) {
+	  return wordDiff.diff(oldStr, newStr, options);
+	}
+
+
+
+/***/ }),
+/* 4 */
+/***/ (function(module, exports) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports. /*istanbul ignore end*/generateOptions = generateOptions;
+	function generateOptions(options, defaults) {
+	  if (typeof options === 'function') {
+	    defaults.callback = options;
+	  } else if (options) {
+	    for (var name in options) {
+	      /* istanbul ignore else */
+	      if (options.hasOwnProperty(name)) {
+	        defaults[name] = options[name];
+	      }
+	    }
+	  }
+	  return defaults;
+	}
+
+
+
+/***/ }),
+/* 5 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports.lineDiff = undefined;
+	exports. /*istanbul ignore end*/diffLines = diffLines;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/diffTrimmedLines = diffTrimmedLines;
+
+	var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/var _base2 = _interopRequireDefault(_base);
+
+	/*istanbul ignore end*/var /*istanbul ignore start*/_params = __webpack_require__(4) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+	/*istanbul ignore end*/var lineDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/lineDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/();
+	lineDiff.tokenize = function (value) {
+	  var retLines = [],
+	      linesAndNewlines = value.split(/(\n|\r\n)/);
+
+	  // Ignore the final empty token that occurs if the string ends with a new line
+	  if (!linesAndNewlines[linesAndNewlines.length - 1]) {
+	    linesAndNewlines.pop();
+	  }
+
+	  // Merge the content and line separators into single tokens
+	  for (var i = 0; i < linesAndNewlines.length; i++) {
+	    var line = linesAndNewlines[i];
+
+	    if (i % 2 && !this.options.newlineIsToken) {
+	      retLines[retLines.length - 1] += line;
+	    } else {
+	      if (this.options.ignoreWhitespace) {
+	        line = line.trim();
+	      }
+	      retLines.push(line);
+	    }
+	  }
+
+	  return retLines;
+	};
+
+	function diffLines(oldStr, newStr, callback) {
+	  return lineDiff.diff(oldStr, newStr, callback);
+	}
+	function diffTrimmedLines(oldStr, newStr, callback) {
+	  var options = /*istanbul ignore start*/(0, _params.generateOptions) /*istanbul ignore end*/(callback, { ignoreWhitespace: true });
+	  return lineDiff.diff(oldStr, newStr, options);
+	}
+
+
+
+/***/ }),
+/* 6 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports.sentenceDiff = undefined;
+	exports. /*istanbul ignore end*/diffSentences = diffSentences;
+
+	var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/var _base2 = _interopRequireDefault(_base);
+
+	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+	/*istanbul ignore end*/var sentenceDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/sentenceDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/();
+	sentenceDiff.tokenize = function (value) {
+	  return value.split(/(\S.+?[.!?])(?=\s+|$)/);
+	};
+
+	function diffSentences(oldStr, newStr, callback) {
+	  return sentenceDiff.diff(oldStr, newStr, callback);
+	}
+
+
+
+/***/ }),
+/* 7 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports.cssDiff = undefined;
+	exports. /*istanbul ignore end*/diffCss = diffCss;
+
+	var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/var _base2 = _interopRequireDefault(_base);
+
+	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+	/*istanbul ignore end*/var cssDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/cssDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/();
+	cssDiff.tokenize = function (value) {
+	  return value.split(/([{}:;,]|\s+)/);
+	};
+
+	function diffCss(oldStr, newStr, callback) {
+	  return cssDiff.diff(oldStr, newStr, callback);
+	}
+
+
+
+/***/ }),
+/* 8 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports.jsonDiff = undefined;
+
+	var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+	exports. /*istanbul ignore end*/diffJson = diffJson;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/canonicalize = canonicalize;
+
+	var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/var _base2 = _interopRequireDefault(_base);
+
+	/*istanbul ignore end*/var /*istanbul ignore start*/_line = __webpack_require__(5) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+	/*istanbul ignore end*/var objectPrototypeToString = Object.prototype.toString;
+
+	var jsonDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/jsonDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/();
+	// Discriminate between two lines of pretty-printed, serialized JSON where one of them has a
+	// dangling comma and the other doesn't. Turns out including the dangling comma yields the nicest output:
+	jsonDiff.useLongestToken = true;
+
+	jsonDiff.tokenize = /*istanbul ignore start*/_line.lineDiff /*istanbul ignore end*/.tokenize;
+	jsonDiff.castInput = function (value) {
+	  /*istanbul ignore start*/var _options = /*istanbul ignore end*/this.options,
+	      undefinedReplacement = _options.undefinedReplacement,
+	      _options$stringifyRep = _options.stringifyReplacer,
+	      stringifyReplacer = _options$stringifyRep === undefined ? function (k, v) /*istanbul ignore start*/{
+	    return (/*istanbul ignore end*/typeof v === 'undefined' ? undefinedReplacement : v
+	    );
+	  } : _options$stringifyRep;
+
+
+	  return typeof value === 'string' ? value : JSON.stringify(canonicalize(value, null, null, stringifyReplacer), stringifyReplacer, '  ');
+	};
+	jsonDiff.equals = function (left, right) {
+	  return (/*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/.prototype.equals.call(jsonDiff, left.replace(/,([\r\n])/g, '$1'), right.replace(/,([\r\n])/g, '$1'))
+	  );
+	};
+
+	function diffJson(oldObj, newObj, options) {
+	  return jsonDiff.diff(oldObj, newObj, options);
+	}
+
+	// This function handles the presence of circular references by bailing out when encountering an
+	// object that is already on the "stack" of items being processed. Accepts an optional replacer
+	function canonicalize(obj, stack, replacementStack, replacer, key) {
+	  stack = stack || [];
+	  replacementStack = replacementStack || [];
+
+	  if (replacer) {
+	    obj = replacer(key, obj);
+	  }
+
+	  var i = /*istanbul ignore start*/void 0 /*istanbul ignore end*/;
+
+	  for (i = 0; i < stack.length; i += 1) {
+	    if (stack[i] === obj) {
+	      return replacementStack[i];
+	    }
+	  }
+
+	  var canonicalizedObj = /*istanbul ignore start*/void 0 /*istanbul ignore end*/;
+
+	  if ('[object Array]' === objectPrototypeToString.call(obj)) {
+	    stack.push(obj);
+	    canonicalizedObj = new Array(obj.length);
+	    replacementStack.push(canonicalizedObj);
+	    for (i = 0; i < obj.length; i += 1) {
+	      canonicalizedObj[i] = canonicalize(obj[i], stack, replacementStack, replacer, key);
+	    }
+	    stack.pop();
+	    replacementStack.pop();
+	    return canonicalizedObj;
+	  }
+
+	  if (obj && obj.toJSON) {
+	    obj = obj.toJSON();
+	  }
+
+	  if ( /*istanbul ignore start*/(typeof /*istanbul ignore end*/obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object' && obj !== null) {
+	    stack.push(obj);
+	    canonicalizedObj = {};
+	    replacementStack.push(canonicalizedObj);
+	    var sortedKeys = [],
+	        _key = /*istanbul ignore start*/void 0 /*istanbul ignore end*/;
+	    for (_key in obj) {
+	      /* istanbul ignore else */
+	      if (obj.hasOwnProperty(_key)) {
+	        sortedKeys.push(_key);
+	      }
+	    }
+	    sortedKeys.sort();
+	    for (i = 0; i < sortedKeys.length; i += 1) {
+	      _key = sortedKeys[i];
+	      canonicalizedObj[_key] = canonicalize(obj[_key], stack, replacementStack, replacer, _key);
+	    }
+	    stack.pop();
+	    replacementStack.pop();
+	  } else {
+	    canonicalizedObj = obj;
+	  }
+	  return canonicalizedObj;
+	}
+
+
+
+/***/ }),
+/* 9 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports.arrayDiff = undefined;
+	exports. /*istanbul ignore end*/diffArrays = diffArrays;
+
+	var /*istanbul ignore start*/_base = __webpack_require__(1) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/var _base2 = _interopRequireDefault(_base);
+
+	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+	/*istanbul ignore end*/var arrayDiff = /*istanbul ignore start*/exports. /*istanbul ignore end*/arrayDiff = new /*istanbul ignore start*/_base2['default'] /*istanbul ignore end*/();
+	arrayDiff.tokenize = function (value) {
+	  return value.slice();
+	};
+	arrayDiff.join = arrayDiff.removeEmpty = function (value) {
+	  return value;
+	};
+
+	function diffArrays(oldArr, newArr, callback) {
+	  return arrayDiff.diff(oldArr, newArr, callback);
+	}
+
+
+
+/***/ }),
+/* 10 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports. /*istanbul ignore end*/applyPatch = applyPatch;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/applyPatches = applyPatches;
+
+	var /*istanbul ignore start*/_parse = __webpack_require__(11) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_distanceIterator = __webpack_require__(12) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/var _distanceIterator2 = _interopRequireDefault(_distanceIterator);
+
+	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
+
+	/*istanbul ignore end*/function applyPatch(source, uniDiff) {
+	  /*istanbul ignore start*/var /*istanbul ignore end*/options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+
+	  if (typeof uniDiff === 'string') {
+	    uniDiff = /*istanbul ignore start*/(0, _parse.parsePatch) /*istanbul ignore end*/(uniDiff);
+	  }
+
+	  if (Array.isArray(uniDiff)) {
+	    if (uniDiff.length > 1) {
+	      throw new Error('applyPatch only works with a single input.');
+	    }
+
+	    uniDiff = uniDiff[0];
+	  }
+
+	  // Apply the diff to the input
+	  var lines = source.split(/\r\n|[\n\v\f\r\x85]/),
+	      delimiters = source.match(/\r\n|[\n\v\f\r\x85]/g) || [],
+	      hunks = uniDiff.hunks,
+	      compareLine = options.compareLine || function (lineNumber, line, operation, patchContent) /*istanbul ignore start*/{
+	    return (/*istanbul ignore end*/line === patchContent
+	    );
+	  },
+	      errorCount = 0,
+	      fuzzFactor = options.fuzzFactor || 0,
+	      minLine = 0,
+	      offset = 0,
+	      removeEOFNL = /*istanbul ignore start*/void 0 /*istanbul ignore end*/,
+	      addEOFNL = /*istanbul ignore start*/void 0 /*istanbul ignore end*/;
+
+	  /**
+	   * Checks if the hunk exactly fits on the provided location
+	   */
+	  function hunkFits(hunk, toPos) {
+	    for (var j = 0; j < hunk.lines.length; j++) {
+	      var line = hunk.lines[j],
+	          operation = line.length > 0 ? line[0] : ' ',
+	          content = line.length > 0 ? line.substr(1) : line;
+
+	      if (operation === ' ' || operation === '-') {
+	        // Context sanity check
+	        if (!compareLine(toPos + 1, lines[toPos], operation, content)) {
+	          errorCount++;
+
+	          if (errorCount > fuzzFactor) {
+	            return false;
+	          }
+	        }
+	        toPos++;
+	      }
+	    }
+
+	    return true;
+	  }
+
+	  // Search best fit offsets for each hunk based on the previous ones
+	  for (var i = 0; i < hunks.length; i++) {
+	    var hunk = hunks[i],
+	        maxLine = lines.length - hunk.oldLines,
+	        localOffset = 0,
+	        toPos = offset + hunk.oldStart - 1;
+
+	    var iterator = /*istanbul ignore start*/(0, _distanceIterator2['default']) /*istanbul ignore end*/(toPos, minLine, maxLine);
+
+	    for (; localOffset !== undefined; localOffset = iterator()) {
+	      if (hunkFits(hunk, toPos + localOffset)) {
+	        hunk.offset = offset += localOffset;
+	        break;
+	      }
+	    }
+
+	    if (localOffset === undefined) {
+	      return false;
+	    }
+
+	    // Set lower text limit to end of the current hunk, so next ones don't try
+	    // to fit over already patched text
+	    minLine = hunk.offset + hunk.oldStart + hunk.oldLines;
+	  }
+
+	  // Apply patch hunks
+	  var diffOffset = 0;
+	  for (var _i = 0; _i < hunks.length; _i++) {
+	    var _hunk = hunks[_i],
+	        _toPos = _hunk.oldStart + _hunk.offset + diffOffset - 1;
+	    diffOffset += _hunk.newLines - _hunk.oldLines;
+
+	    if (_toPos < 0) {
+	      // Creating a new file
+	      _toPos = 0;
+	    }
+
+	    for (var j = 0; j < _hunk.lines.length; j++) {
+	      var line = _hunk.lines[j],
+	          operation = line.length > 0 ? line[0] : ' ',
+	          content = line.length > 0 ? line.substr(1) : line,
+	          delimiter = _hunk.linedelimiters[j];
+
+	      if (operation === ' ') {
+	        _toPos++;
+	      } else if (operation === '-') {
+	        lines.splice(_toPos, 1);
+	        delimiters.splice(_toPos, 1);
+	        /* istanbul ignore else */
+	      } else if (operation === '+') {
+	        lines.splice(_toPos, 0, content);
+	        delimiters.splice(_toPos, 0, delimiter);
+	        _toPos++;
+	      } else if (operation === '\\') {
+	        var previousOperation = _hunk.lines[j - 1] ? _hunk.lines[j - 1][0] : null;
+	        if (previousOperation === '+') {
+	          removeEOFNL = true;
+	        } else if (previousOperation === '-') {
+	          addEOFNL = true;
+	        }
+	      }
+	    }
+	  }
+
+	  // Handle EOFNL insertion/removal
+	  if (removeEOFNL) {
+	    while (!lines[lines.length - 1]) {
+	      lines.pop();
+	      delimiters.pop();
+	    }
+	  } else if (addEOFNL) {
+	    lines.push('');
+	    delimiters.push('\n');
+	  }
+	  for (var _k = 0; _k < lines.length - 1; _k++) {
+	    lines[_k] = lines[_k] + delimiters[_k];
+	  }
+	  return lines.join('');
+	}
+
+	// Wrapper that supports multiple file patches via callbacks.
+	function applyPatches(uniDiff, options) {
+	  if (typeof uniDiff === 'string') {
+	    uniDiff = /*istanbul ignore start*/(0, _parse.parsePatch) /*istanbul ignore end*/(uniDiff);
+	  }
+
+	  var currentIndex = 0;
+	  function processIndex() {
+	    var index = uniDiff[currentIndex++];
+	    if (!index) {
+	      return options.complete();
+	    }
+
+	    options.loadFile(index, function (err, data) {
+	      if (err) {
+	        return options.complete(err);
+	      }
+
+	      var updatedContent = applyPatch(data, index, options);
+	      options.patched(index, updatedContent, function (err) {
+	        if (err) {
+	          return options.complete(err);
+	        }
+
+	        processIndex();
+	      });
+	    });
+	  }
+	  processIndex();
+	}
+
+
+
+/***/ }),
+/* 11 */
+/***/ (function(module, exports) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports. /*istanbul ignore end*/parsePatch = parsePatch;
+	function parsePatch(uniDiff) {
+	  /*istanbul ignore start*/var /*istanbul ignore end*/options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+	  var diffstr = uniDiff.split(/\r\n|[\n\v\f\r\x85]/),
+	      delimiters = uniDiff.match(/\r\n|[\n\v\f\r\x85]/g) || [],
+	      list = [],
+	      i = 0;
+
+	  function parseIndex() {
+	    var index = {};
+	    list.push(index);
+
+	    // Parse diff metadata
+	    while (i < diffstr.length) {
+	      var line = diffstr[i];
+
+	      // File header found, end parsing diff metadata
+	      if (/^(\-\-\-|\+\+\+|@@)\s/.test(line)) {
+	        break;
+	      }
+
+	      // Diff index
+	      var header = /^(?:Index:|diff(?: -r \w+)+)\s+(.+?)\s*$/.exec(line);
+	      if (header) {
+	        index.index = header[1];
+	      }
+
+	      i++;
+	    }
+
+	    // Parse file headers if they are defined. Unified diff requires them, but
+	    // there's no technical issues to have an isolated hunk without file header
+	    parseFileHeader(index);
+	    parseFileHeader(index);
+
+	    // Parse hunks
+	    index.hunks = [];
+
+	    while (i < diffstr.length) {
+	      var _line = diffstr[i];
+
+	      if (/^(Index:|diff|\-\-\-|\+\+\+)\s/.test(_line)) {
+	        break;
+	      } else if (/^@@/.test(_line)) {
+	        index.hunks.push(parseHunk());
+	      } else if (_line && options.strict) {
+	        // Ignore unexpected content unless in strict mode
+	        throw new Error('Unknown line ' + (i + 1) + ' ' + JSON.stringify(_line));
+	      } else {
+	        i++;
+	      }
+	    }
+	  }
+
+	  // Parses the --- and +++ headers, if none are found, no lines
+	  // are consumed.
+	  function parseFileHeader(index) {
+	    var fileHeader = /^(---|\+\+\+)\s+(.*)$/.exec(diffstr[i]);
+	    if (fileHeader) {
+	      var keyPrefix = fileHeader[1] === '---' ? 'old' : 'new';
+	      var data = fileHeader[2].split('\t', 2);
+	      var fileName = data[0].replace(/\\\\/g, '\\');
+	      if (/^".*"$/.test(fileName)) {
+	        fileName = fileName.substr(1, fileName.length - 2);
+	      }
+	      index[keyPrefix + 'FileName'] = fileName;
+	      index[keyPrefix + 'Header'] = (data[1] || '').trim();
+
+	      i++;
+	    }
+	  }
+
+	  // Parses a hunk
+	  // This assumes that we are at the start of a hunk.
+	  function parseHunk() {
+	    var chunkHeaderIndex = i,
+	        chunkHeaderLine = diffstr[i++],
+	        chunkHeader = chunkHeaderLine.split(/@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@/);
+
+	    var hunk = {
+	      oldStart: +chunkHeader[1],
+	      oldLines: +chunkHeader[2] || 1,
+	      newStart: +chunkHeader[3],
+	      newLines: +chunkHeader[4] || 1,
+	      lines: [],
+	      linedelimiters: []
+	    };
+
+	    var addCount = 0,
+	        removeCount = 0;
+	    for (; i < diffstr.length; i++) {
+	      // Lines starting with '---' could be mistaken for the "remove line" operation
+	      // But they could be the header for the next file. Therefore prune such cases out.
+	      if (diffstr[i].indexOf('--- ') === 0 && i + 2 < diffstr.length && diffstr[i + 1].indexOf('+++ ') === 0 && diffstr[i + 2].indexOf('@@') === 0) {
+	        break;
+	      }
+	      var operation = diffstr[i].length == 0 && i != diffstr.length - 1 ? ' ' : diffstr[i][0];
+
+	      if (operation === '+' || operation === '-' || operation === ' ' || operation === '\\') {
+	        hunk.lines.push(diffstr[i]);
+	        hunk.linedelimiters.push(delimiters[i] || '\n');
+
+	        if (operation === '+') {
+	          addCount++;
+	        } else if (operation === '-') {
+	          removeCount++;
+	        } else if (operation === ' ') {
+	          addCount++;
+	          removeCount++;
+	        }
+	      } else {
+	        break;
+	      }
+	    }
+
+	    // Handle the empty block count case
+	    if (!addCount && hunk.newLines === 1) {
+	      hunk.newLines = 0;
+	    }
+	    if (!removeCount && hunk.oldLines === 1) {
+	      hunk.oldLines = 0;
+	    }
+
+	    // Perform optional sanity checking
+	    if (options.strict) {
+	      if (addCount !== hunk.newLines) {
+	        throw new Error('Added line count did not match for hunk at line ' + (chunkHeaderIndex + 1));
+	      }
+	      if (removeCount !== hunk.oldLines) {
+	        throw new Error('Removed line count did not match for hunk at line ' + (chunkHeaderIndex + 1));
+	      }
+	    }
+
+	    return hunk;
+	  }
+
+	  while (i < diffstr.length) {
+	    parseIndex();
+	  }
+
+	  return list;
+	}
+
+
+
+/***/ }),
+/* 12 */
+/***/ (function(module, exports) {
+
+	/*istanbul ignore start*/"use strict";
+
+	exports.__esModule = true;
+
+	exports["default"] = /*istanbul ignore end*/function (start, minLine, maxLine) {
+	  var wantForward = true,
+	      backwardExhausted = false,
+	      forwardExhausted = false,
+	      localOffset = 1;
+
+	  return function iterator() {
+	    if (wantForward && !forwardExhausted) {
+	      if (backwardExhausted) {
+	        localOffset++;
+	      } else {
+	        wantForward = false;
+	      }
+
+	      // Check if trying to fit beyond text length, and if not, check it fits
+	      // after offset location (or desired location on first iteration)
+	      if (start + localOffset <= maxLine) {
+	        return localOffset;
+	      }
+
+	      forwardExhausted = true;
+	    }
+
+	    if (!backwardExhausted) {
+	      if (!forwardExhausted) {
+	        wantForward = true;
+	      }
+
+	      // Check if trying to fit before text beginning, and if not, check it fits
+	      // before offset location
+	      if (minLine <= start - localOffset) {
+	        return -localOffset++;
+	      }
+
+	      backwardExhausted = true;
+	      return iterator();
+	    }
+
+	    // We tried to fit hunk before text beginning and beyond text length, then
+	    // hunk can't fit on the text. Return undefined
+	  };
+	};
+
+
+
+/***/ }),
+/* 13 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports. /*istanbul ignore end*/calcLineCount = calcLineCount;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/merge = merge;
+
+	var /*istanbul ignore start*/_create = __webpack_require__(14) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_parse = __webpack_require__(11) /*istanbul ignore end*/;
+
+	var /*istanbul ignore start*/_array = __webpack_require__(15) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
+
+	/*istanbul ignore end*/function calcLineCount(hunk) {
+	  /*istanbul ignore start*/var _calcOldNewLineCount = /*istanbul ignore end*/calcOldNewLineCount(hunk.lines),
+	      oldLines = _calcOldNewLineCount.oldLines,
+	      newLines = _calcOldNewLineCount.newLines;
+
+	  if (oldLines !== undefined) {
+	    hunk.oldLines = oldLines;
+	  } else {
+	    delete hunk.oldLines;
+	  }
+
+	  if (newLines !== undefined) {
+	    hunk.newLines = newLines;
+	  } else {
+	    delete hunk.newLines;
+	  }
+	}
+
+	function merge(mine, theirs, base) {
+	  mine = loadPatch(mine, base);
+	  theirs = loadPatch(theirs, base);
+
+	  var ret = {};
+
+	  // For index we just let it pass through as it doesn't have any necessary meaning.
+	  // Leaving sanity checks on this to the API consumer that may know more about the
+	  // meaning in their own context.
+	  if (mine.index || theirs.index) {
+	    ret.index = mine.index || theirs.index;
+	  }
+
+	  if (mine.newFileName || theirs.newFileName) {
+	    if (!fileNameChanged(mine)) {
+	      // No header or no change in ours, use theirs (and ours if theirs does not exist)
+	      ret.oldFileName = theirs.oldFileName || mine.oldFileName;
+	      ret.newFileName = theirs.newFileName || mine.newFileName;
+	      ret.oldHeader = theirs.oldHeader || mine.oldHeader;
+	      ret.newHeader = theirs.newHeader || mine.newHeader;
+	    } else if (!fileNameChanged(theirs)) {
+	      // No header or no change in theirs, use ours
+	      ret.oldFileName = mine.oldFileName;
+	      ret.newFileName = mine.newFileName;
+	      ret.oldHeader = mine.oldHeader;
+	      ret.newHeader = mine.newHeader;
+	    } else {
+	      // Both changed... figure it out
+	      ret.oldFileName = selectField(ret, mine.oldFileName, theirs.oldFileName);
+	      ret.newFileName = selectField(ret, mine.newFileName, theirs.newFileName);
+	      ret.oldHeader = selectField(ret, mine.oldHeader, theirs.oldHeader);
+	      ret.newHeader = selectField(ret, mine.newHeader, theirs.newHeader);
+	    }
+	  }
+
+	  ret.hunks = [];
+
+	  var mineIndex = 0,
+	      theirsIndex = 0,
+	      mineOffset = 0,
+	      theirsOffset = 0;
+
+	  while (mineIndex < mine.hunks.length || theirsIndex < theirs.hunks.length) {
+	    var mineCurrent = mine.hunks[mineIndex] || { oldStart: Infinity },
+	        theirsCurrent = theirs.hunks[theirsIndex] || { oldStart: Infinity };
+
+	    if (hunkBefore(mineCurrent, theirsCurrent)) {
+	      // This patch does not overlap with any of the others, yay.
+	      ret.hunks.push(cloneHunk(mineCurrent, mineOffset));
+	      mineIndex++;
+	      theirsOffset += mineCurrent.newLines - mineCurrent.oldLines;
+	    } else if (hunkBefore(theirsCurrent, mineCurrent)) {
+	      // This patch does not overlap with any of the others, yay.
+	      ret.hunks.push(cloneHunk(theirsCurrent, theirsOffset));
+	      theirsIndex++;
+	      mineOffset += theirsCurrent.newLines - theirsCurrent.oldLines;
+	    } else {
+	      // Overlap, merge as best we can
+	      var mergedHunk = {
+	        oldStart: Math.min(mineCurrent.oldStart, theirsCurrent.oldStart),
+	        oldLines: 0,
+	        newStart: Math.min(mineCurrent.newStart + mineOffset, theirsCurrent.oldStart + theirsOffset),
+	        newLines: 0,
+	        lines: []
+	      };
+	      mergeLines(mergedHunk, mineCurrent.oldStart, mineCurrent.lines, theirsCurrent.oldStart, theirsCurrent.lines);
+	      theirsIndex++;
+	      mineIndex++;
+
+	      ret.hunks.push(mergedHunk);
+	    }
+	  }
+
+	  return ret;
+	}
+
+	function loadPatch(param, base) {
+	  if (typeof param === 'string') {
+	    if (/^@@/m.test(param) || /^Index:/m.test(param)) {
+	      return (/*istanbul ignore start*/(0, _parse.parsePatch) /*istanbul ignore end*/(param)[0]
+	      );
+	    }
+
+	    if (!base) {
+	      throw new Error('Must provide a base reference or pass in a patch');
+	    }
+	    return (/*istanbul ignore start*/(0, _create.structuredPatch) /*istanbul ignore end*/(undefined, undefined, base, param)
+	    );
+	  }
+
+	  return param;
+	}
+
+	function fileNameChanged(patch) {
+	  return patch.newFileName && patch.newFileName !== patch.oldFileName;
+	}
+
+	function selectField(index, mine, theirs) {
+	  if (mine === theirs) {
+	    return mine;
+	  } else {
+	    index.conflict = true;
+	    return { mine: mine, theirs: theirs };
+	  }
+	}
+
+	function hunkBefore(test, check) {
+	  return test.oldStart < check.oldStart && test.oldStart + test.oldLines < check.oldStart;
+	}
+
+	function cloneHunk(hunk, offset) {
+	  return {
+	    oldStart: hunk.oldStart, oldLines: hunk.oldLines,
+	    newStart: hunk.newStart + offset, newLines: hunk.newLines,
+	    lines: hunk.lines
+	  };
+	}
+
+	function mergeLines(hunk, mineOffset, mineLines, theirOffset, theirLines) {
+	  // This will generally result in a conflicted hunk, but there are cases where the context
+	  // is the only overlap where we can successfully merge the content here.
+	  var mine = { offset: mineOffset, lines: mineLines, index: 0 },
+	      their = { offset: theirOffset, lines: theirLines, index: 0 };
+
+	  // Handle any leading content
+	  insertLeading(hunk, mine, their);
+	  insertLeading(hunk, their, mine);
+
+	  // Now in the overlap content. Scan through and select the best changes from each.
+	  while (mine.index < mine.lines.length && their.index < their.lines.length) {
+	    var mineCurrent = mine.lines[mine.index],
+	        theirCurrent = their.lines[their.index];
+
+	    if ((mineCurrent[0] === '-' || mineCurrent[0] === '+') && (theirCurrent[0] === '-' || theirCurrent[0] === '+')) {
+	      // Both modified ...
+	      mutualChange(hunk, mine, their);
+	    } else if (mineCurrent[0] === '+' && theirCurrent[0] === ' ') {
+	      /*istanbul ignore start*/var _hunk$lines;
+
+	      /*istanbul ignore end*/ // Mine inserted
+	      /*istanbul ignore start*/(_hunk$lines = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/collectChange(mine)));
+	    } else if (theirCurrent[0] === '+' && mineCurrent[0] === ' ') {
+	      /*istanbul ignore start*/var _hunk$lines2;
+
+	      /*istanbul ignore end*/ // Theirs inserted
+	      /*istanbul ignore start*/(_hunk$lines2 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines2 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/collectChange(their)));
+	    } else if (mineCurrent[0] === '-' && theirCurrent[0] === ' ') {
+	      // Mine removed or edited
+	      removal(hunk, mine, their);
+	    } else if (theirCurrent[0] === '-' && mineCurrent[0] === ' ') {
+	      // Their removed or edited
+	      removal(hunk, their, mine, true);
+	    } else if (mineCurrent === theirCurrent) {
+	      // Context identity
+	      hunk.lines.push(mineCurrent);
+	      mine.index++;
+	      their.index++;
+	    } else {
+	      // Context mismatch
+	      conflict(hunk, collectChange(mine), collectChange(their));
+	    }
+	  }
+
+	  // Now push anything that may be remaining
+	  insertTrailing(hunk, mine);
+	  insertTrailing(hunk, their);
+
+	  calcLineCount(hunk);
+	}
+
+	function mutualChange(hunk, mine, their) {
+	  var myChanges = collectChange(mine),
+	      theirChanges = collectChange(their);
+
+	  if (allRemoves(myChanges) && allRemoves(theirChanges)) {
+	    // Special case for remove changes that are supersets of one another
+	    if ( /*istanbul ignore start*/(0, _array.arrayStartsWith) /*istanbul ignore end*/(myChanges, theirChanges) && skipRemoveSuperset(their, myChanges, myChanges.length - theirChanges.length)) {
+	      /*istanbul ignore start*/var _hunk$lines3;
+
+	      /*istanbul ignore end*/ /*istanbul ignore start*/(_hunk$lines3 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines3 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/myChanges));
+	      return;
+	    } else if ( /*istanbul ignore start*/(0, _array.arrayStartsWith) /*istanbul ignore end*/(theirChanges, myChanges) && skipRemoveSuperset(mine, theirChanges, theirChanges.length - myChanges.length)) {
+	      /*istanbul ignore start*/var _hunk$lines4;
+
+	      /*istanbul ignore end*/ /*istanbul ignore start*/(_hunk$lines4 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines4 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/theirChanges));
+	      return;
+	    }
+	  } else if ( /*istanbul ignore start*/(0, _array.arrayEqual) /*istanbul ignore end*/(myChanges, theirChanges)) {
+	    /*istanbul ignore start*/var _hunk$lines5;
+
+	    /*istanbul ignore end*/ /*istanbul ignore start*/(_hunk$lines5 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines5 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/myChanges));
+	    return;
+	  }
+
+	  conflict(hunk, myChanges, theirChanges);
+	}
+
+	function removal(hunk, mine, their, swap) {
+	  var myChanges = collectChange(mine),
+	      theirChanges = collectContext(their, myChanges);
+	  if (theirChanges.merged) {
+	    /*istanbul ignore start*/var _hunk$lines6;
+
+	    /*istanbul ignore end*/ /*istanbul ignore start*/(_hunk$lines6 = /*istanbul ignore end*/hunk.lines).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_hunk$lines6 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/theirChanges.merged));
+	  } else {
+	    conflict(hunk, swap ? theirChanges : myChanges, swap ? myChanges : theirChanges);
+	  }
+	}
+
+	function conflict(hunk, mine, their) {
+	  hunk.conflict = true;
+	  hunk.lines.push({
+	    conflict: true,
+	    mine: mine,
+	    theirs: their
+	  });
+	}
+
+	function insertLeading(hunk, insert, their) {
+	  while (insert.offset < their.offset && insert.index < insert.lines.length) {
+	    var line = insert.lines[insert.index++];
+	    hunk.lines.push(line);
+	    insert.offset++;
+	  }
+	}
+	function insertTrailing(hunk, insert) {
+	  while (insert.index < insert.lines.length) {
+	    var line = insert.lines[insert.index++];
+	    hunk.lines.push(line);
+	  }
+	}
+
+	function collectChange(state) {
+	  var ret = [],
+	      operation = state.lines[state.index][0];
+	  while (state.index < state.lines.length) {
+	    var line = state.lines[state.index];
+
+	    // Group additions that are immediately after subtractions and treat them as one "atomic" modify change.
+	    if (operation === '-' && line[0] === '+') {
+	      operation = '+';
+	    }
+
+	    if (operation === line[0]) {
+	      ret.push(line);
+	      state.index++;
+	    } else {
+	      break;
+	    }
+	  }
+
+	  return ret;
+	}
+	function collectContext(state, matchChanges) {
+	  var changes = [],
+	      merged = [],
+	      matchIndex = 0,
+	      contextChanges = false,
+	      conflicted = false;
+	  while (matchIndex < matchChanges.length && state.index < state.lines.length) {
+	    var change = state.lines[state.index],
+	        match = matchChanges[matchIndex];
+
+	    // Once we've hit our add, then we are done
+	    if (match[0] === '+') {
+	      break;
+	    }
+
+	    contextChanges = contextChanges || change[0] !== ' ';
+
+	    merged.push(match);
+	    matchIndex++;
+
+	    // Consume any additions in the other block as a conflict to attempt
+	    // to pull in the remaining context after this
+	    if (change[0] === '+') {
+	      conflicted = true;
+
+	      while (change[0] === '+') {
+	        changes.push(change);
+	        change = state.lines[++state.index];
+	      }
+	    }
+
+	    if (match.substr(1) === change.substr(1)) {
+	      changes.push(change);
+	      state.index++;
+	    } else {
+	      conflicted = true;
+	    }
+	  }
+
+	  if ((matchChanges[matchIndex] || '')[0] === '+' && contextChanges) {
+	    conflicted = true;
+	  }
+
+	  if (conflicted) {
+	    return changes;
+	  }
+
+	  while (matchIndex < matchChanges.length) {
+	    merged.push(matchChanges[matchIndex++]);
+	  }
+
+	  return {
+	    merged: merged,
+	    changes: changes
+	  };
+	}
+
+	function allRemoves(changes) {
+	  return changes.reduce(function (prev, change) {
+	    return prev && change[0] === '-';
+	  }, true);
+	}
+	function skipRemoveSuperset(state, removeChanges, delta) {
+	  for (var i = 0; i < delta; i++) {
+	    var changeContent = removeChanges[removeChanges.length - delta + i].substr(1);
+	    if (state.lines[state.index + i] !== ' ' + changeContent) {
+	      return false;
+	    }
+	  }
+
+	  state.index += delta;
+	  return true;
+	}
+
+	function calcOldNewLineCount(lines) {
+	  var oldLines = 0;
+	  var newLines = 0;
+
+	  lines.forEach(function (line) {
+	    if (typeof line !== 'string') {
+	      var myCount = calcOldNewLineCount(line.mine);
+	      var theirCount = calcOldNewLineCount(line.theirs);
+
+	      if (oldLines !== undefined) {
+	        if (myCount.oldLines === theirCount.oldLines) {
+	          oldLines += myCount.oldLines;
+	        } else {
+	          oldLines = undefined;
+	        }
+	      }
+
+	      if (newLines !== undefined) {
+	        if (myCount.newLines === theirCount.newLines) {
+	          newLines += myCount.newLines;
+	        } else {
+	          newLines = undefined;
+	        }
+	      }
+	    } else {
+	      if (newLines !== undefined && (line[0] === '+' || line[0] === ' ')) {
+	        newLines++;
+	      }
+	      if (oldLines !== undefined && (line[0] === '-' || line[0] === ' ')) {
+	        oldLines++;
+	      }
+	    }
+	  });
+
+	  return { oldLines: oldLines, newLines: newLines };
+	}
+
+
+
+/***/ }),
+/* 14 */
+/***/ (function(module, exports, __webpack_require__) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports. /*istanbul ignore end*/structuredPatch = structuredPatch;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/createTwoFilesPatch = createTwoFilesPatch;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/createPatch = createPatch;
+
+	var /*istanbul ignore start*/_line = __webpack_require__(5) /*istanbul ignore end*/;
+
+	/*istanbul ignore start*/function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
+
+	/*istanbul ignore end*/function structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) {
+	  if (!options) {
+	    options = {};
+	  }
+	  if (typeof options.context === 'undefined') {
+	    options.context = 4;
+	  }
+
+	  var diff = /*istanbul ignore start*/(0, _line.diffLines) /*istanbul ignore end*/(oldStr, newStr, options);
+	  diff.push({ value: '', lines: [] }); // Append an empty value to make cleanup easier
+
+	  function contextLines(lines) {
+	    return lines.map(function (entry) {
+	      return ' ' + entry;
+	    });
+	  }
+
+	  var hunks = [];
+	  var oldRangeStart = 0,
+	      newRangeStart = 0,
+	      curRange = [],
+	      oldLine = 1,
+	      newLine = 1;
+
+	  /*istanbul ignore start*/var _loop = function _loop( /*istanbul ignore end*/i) {
+	    var current = diff[i],
+	        lines = current.lines || current.value.replace(/\n$/, '').split('\n');
+	    current.lines = lines;
+
+	    if (current.added || current.removed) {
+	      /*istanbul ignore start*/var _curRange;
+
+	      /*istanbul ignore end*/ // If we have previous context, start with that
+	      if (!oldRangeStart) {
+	        var prev = diff[i - 1];
+	        oldRangeStart = oldLine;
+	        newRangeStart = newLine;
+
+	        if (prev) {
+	          curRange = options.context > 0 ? contextLines(prev.lines.slice(-options.context)) : [];
+	          oldRangeStart -= curRange.length;
+	          newRangeStart -= curRange.length;
+	        }
+	      }
+
+	      // Output our changes
+	      /*istanbul ignore start*/(_curRange = /*istanbul ignore end*/curRange).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_curRange /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/lines.map(function (entry) {
+	        return (current.added ? '+' : '-') + entry;
+	      })));
+
+	      // Track the updated file position
+	      if (current.added) {
+	        newLine += lines.length;
+	      } else {
+	        oldLine += lines.length;
+	      }
+	    } else {
+	      // Identical context lines. Track line changes
+	      if (oldRangeStart) {
+	        // Close out any changes that have been output (or join overlapping)
+	        if (lines.length <= options.context * 2 && i < diff.length - 2) {
+	          /*istanbul ignore start*/var _curRange2;
+
+	          /*istanbul ignore end*/ // Overlapping
+	          /*istanbul ignore start*/(_curRange2 = /*istanbul ignore end*/curRange).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_curRange2 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/contextLines(lines)));
+	        } else {
+	          /*istanbul ignore start*/var _curRange3;
+
+	          /*istanbul ignore end*/ // end the range and output
+	          var contextSize = Math.min(lines.length, options.context);
+	          /*istanbul ignore start*/(_curRange3 = /*istanbul ignore end*/curRange).push. /*istanbul ignore start*/apply /*istanbul ignore end*/( /*istanbul ignore start*/_curRange3 /*istanbul ignore end*/, /*istanbul ignore start*/_toConsumableArray( /*istanbul ignore end*/contextLines(lines.slice(0, contextSize))));
+
+	          var hunk = {
+	            oldStart: oldRangeStart,
+	            oldLines: oldLine - oldRangeStart + contextSize,
+	            newStart: newRangeStart,
+	            newLines: newLine - newRangeStart + contextSize,
+	            lines: curRange
+	          };
+	          if (i >= diff.length - 2 && lines.length <= options.context) {
+	            // EOF is inside this hunk
+	            var oldEOFNewline = /\n$/.test(oldStr);
+	            var newEOFNewline = /\n$/.test(newStr);
+	            if (lines.length == 0 && !oldEOFNewline) {
+	              // special case: old has no eol and no trailing context; no-nl can end up before adds
+	              curRange.splice(hunk.oldLines, 0, '\\ No newline at end of file');
+	            } else if (!oldEOFNewline || !newEOFNewline) {
+	              curRange.push('\\ No newline at end of file');
+	            }
+	          }
+	          hunks.push(hunk);
+
+	          oldRangeStart = 0;
+	          newRangeStart = 0;
+	          curRange = [];
+	        }
+	      }
+	      oldLine += lines.length;
+	      newLine += lines.length;
+	    }
+	  };
+
+	  for (var i = 0; i < diff.length; i++) {
+	    /*istanbul ignore start*/_loop( /*istanbul ignore end*/i);
+	  }
+
+	  return {
+	    oldFileName: oldFileName, newFileName: newFileName,
+	    oldHeader: oldHeader, newHeader: newHeader,
+	    hunks: hunks
+	  };
+	}
+
+	function createTwoFilesPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) {
+	  var diff = structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options);
+
+	  var ret = [];
+	  if (oldFileName == newFileName) {
+	    ret.push('Index: ' + oldFileName);
+	  }
+	  ret.push('===================================================================');
+	  ret.push('--- ' + diff.oldFileName + (typeof diff.oldHeader === 'undefined' ? '' : '\t' + diff.oldHeader));
+	  ret.push('+++ ' + diff.newFileName + (typeof diff.newHeader === 'undefined' ? '' : '\t' + diff.newHeader));
+
+	  for (var i = 0; i < diff.hunks.length; i++) {
+	    var hunk = diff.hunks[i];
+	    ret.push('@@ -' + hunk.oldStart + ',' + hunk.oldLines + ' +' + hunk.newStart + ',' + hunk.newLines + ' @@');
+	    ret.push.apply(ret, hunk.lines);
+	  }
+
+	  return ret.join('\n') + '\n';
+	}
+
+	function createPatch(fileName, oldStr, newStr, oldHeader, newHeader, options) {
+	  return createTwoFilesPatch(fileName, fileName, oldStr, newStr, oldHeader, newHeader, options);
+	}
+
+
+
+/***/ }),
+/* 15 */
+/***/ (function(module, exports) {
+
+	/*istanbul ignore start*/"use strict";
+
+	exports.__esModule = true;
+	exports. /*istanbul ignore end*/arrayEqual = arrayEqual;
+	/*istanbul ignore start*/exports. /*istanbul ignore end*/arrayStartsWith = arrayStartsWith;
+	function arrayEqual(a, b) {
+	  if (a.length !== b.length) {
+	    return false;
+	  }
+
+	  return arrayStartsWith(a, b);
+	}
+
+	function arrayStartsWith(array, start) {
+	  if (start.length > array.length) {
+	    return false;
+	  }
+
+	  for (var i = 0; i < start.length; i++) {
+	    if (start[i] !== array[i]) {
+	      return false;
+	    }
+	  }
+
+	  return true;
+	}
+
+
+
+/***/ }),
+/* 16 */
+/***/ (function(module, exports) {
+
+	/*istanbul ignore start*/"use strict";
+
+	exports.__esModule = true;
+	exports. /*istanbul ignore end*/convertChangesToDMP = convertChangesToDMP;
+	// See: http://code.google.com/p/google-diff-match-patch/wiki/API
+	function convertChangesToDMP(changes) {
+	  var ret = [],
+	      change = /*istanbul ignore start*/void 0 /*istanbul ignore end*/,
+	      operation = /*istanbul ignore start*/void 0 /*istanbul ignore end*/;
+	  for (var i = 0; i < changes.length; i++) {
+	    change = changes[i];
+	    if (change.added) {
+	      operation = 1;
+	    } else if (change.removed) {
+	      operation = -1;
+	    } else {
+	      operation = 0;
+	    }
+
+	    ret.push([operation, change.value]);
+	  }
+	  return ret;
+	}
+
+
+
+/***/ }),
+/* 17 */
+/***/ (function(module, exports) {
+
+	/*istanbul ignore start*/'use strict';
+
+	exports.__esModule = true;
+	exports. /*istanbul ignore end*/convertChangesToXML = convertChangesToXML;
+	function convertChangesToXML(changes) {
+	  var ret = [];
+	  for (var i = 0; i < changes.length; i++) {
+	    var change = changes[i];
+	    if (change.added) {
+	      ret.push('<ins>');
+	    } else if (change.removed) {
+	      ret.push('<del>');
+	    }
+
+	    ret.push(escapeHTML(change.value));
+
+	    if (change.added) {
+	      ret.push('</ins>');
+	    } else if (change.removed) {
+	      ret.push('</del>');
+	    }
+	  }
+	  return ret.join('');
+	}
+
+	function escapeHTML(s) {
+	  var n = s;
+	  n = n.replace(/&/g, '&amp;');
+	  n = n.replace(/</g, '&lt;');
+	  n = n.replace(/>/g, '&gt;');
+	  n = n.replace(/"/g, '&quot;');
+
+	  return n;
+	}
+
+
+
+/***/ })
+/******/ ])
+});
+;
+},{}],49:[function(require,module,exports){
+'use strict';
+
+var matchOperatorsRe = /[|\\{}()[\]^$+*?.]/g;
+
+module.exports = function (str) {
+	if (typeof str !== 'string') {
+		throw new TypeError('Expected a string');
+	}
+
+	return str.replace(matchOperatorsRe, '\\$&');
+};
+
+},{}],50:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var objectCreate = Object.create || objectCreatePolyfill
+var objectKeys = Object.keys || objectKeysPolyfill
+var bind = Function.prototype.bind || functionBindPolyfill
+
+function EventEmitter() {
+  if (!this._events || !Object.prototype.hasOwnProperty.call(this, '_events')) {
+    this._events = objectCreate(null);
+    this._eventsCount = 0;
+  }
+
+  this._maxListeners = this._maxListeners || undefined;
+}
+module.exports = EventEmitter;
+
+// Backwards-compat with node 0.10.x
+EventEmitter.EventEmitter = EventEmitter;
+
+EventEmitter.prototype._events = undefined;
+EventEmitter.prototype._maxListeners = undefined;
+
+// By default EventEmitters will print a warning if more than 10 listeners are
+// added to it. This is a useful default which helps finding memory leaks.
+var defaultMaxListeners = 10;
+
+var hasDefineProperty;
+try {
+  var o = {};
+  if (Object.defineProperty) Object.defineProperty(o, 'x', { value: 0 });
+  hasDefineProperty = o.x === 0;
+} catch (err) { hasDefineProperty = false }
+if (hasDefineProperty) {
+  Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
+    enumerable: true,
+    get: function() {
+      return defaultMaxListeners;
+    },
+    set: function(arg) {
+      // check whether the input is a positive number (whose value is zero or
+      // greater and not a NaN).
+      if (typeof arg !== 'number' || arg < 0 || arg !== arg)
+        throw new TypeError('"defaultMaxListeners" must be a positive number');
+      defaultMaxListeners = arg;
+    }
+  });
+} else {
+  EventEmitter.defaultMaxListeners = defaultMaxListeners;
+}
+
+// Obviously not all Emitters should be limited to 10. This function allows
+// that to be increased. Set to zero for unlimited.
+EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
+  if (typeof n !== 'number' || n < 0 || isNaN(n))
+    throw new TypeError('"n" argument must be a positive number');
+  this._maxListeners = n;
+  return this;
+};
+
+function $getMaxListeners(that) {
+  if (that._maxListeners === undefined)
+    return EventEmitter.defaultMaxListeners;
+  return that._maxListeners;
+}
+
+EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
+  return $getMaxListeners(this);
+};
+
+// These standalone emit* functions are used to optimize calling of event
+// handlers for fast cases because emit() itself often has a variable number of
+// arguments and can be deoptimized because of that. These functions always have
+// the same number of arguments and thus do not get deoptimized, so the code
+// inside them can execute faster.
+function emitNone(handler, isFn, self) {
+  if (isFn)
+    handler.call(self);
+  else {
+    var len = handler.length;
+    var listeners = arrayClone(handler, len);
+    for (var i = 0; i < len; ++i)
+      listeners[i].call(self);
+  }
+}
+function emitOne(handler, isFn, self, arg1) {
+  if (isFn)
+    handler.call(self, arg1);
+  else {
+    var len = handler.length;
+    var listeners = arrayClone(handler, len);
+    for (var i = 0; i < len; ++i)
+      listeners[i].call(self, arg1);
+  }
+}
+function emitTwo(handler, isFn, self, arg1, arg2) {
+  if (isFn)
+    handler.call(self, arg1, arg2);
+  else {
+    var len = handler.length;
+    var listeners = arrayClone(handler, len);
+    for (var i = 0; i < len; ++i)
+      listeners[i].call(self, arg1, arg2);
+  }
+}
+function emitThree(handler, isFn, self, arg1, arg2, arg3) {
+  if (isFn)
+    handler.call(self, arg1, arg2, arg3);
+  else {
+    var len = handler.length;
+    var listeners = arrayClone(handler, len);
+    for (var i = 0; i < len; ++i)
+      listeners[i].call(self, arg1, arg2, arg3);
+  }
+}
+
+function emitMany(handler, isFn, self, args) {
+  if (isFn)
+    handler.apply(self, args);
+  else {
+    var len = handler.length;
+    var listeners = arrayClone(handler, len);
+    for (var i = 0; i < len; ++i)
+      listeners[i].apply(self, args);
+  }
+}
+
+EventEmitter.prototype.emit = function emit(type) {
+  var er, handler, len, args, i, events;
+  var doError = (type === 'error');
+
+  events = this._events;
+  if (events)
+    doError = (doError && events.error == null);
+  else if (!doError)
+    return false;
+
+  // If there is no 'error' event listener then throw.
+  if (doError) {
+    if (arguments.length > 1)
+      er = arguments[1];
+    if (er instanceof Error) {
+      throw er; // Unhandled 'error' event
+    } else {
+      // At least give some kind of context to the user
+      var err = new Error('Unhandled "error" event. (' + er + ')');
+      err.context = er;
+      throw err;
+    }
+    return false;
+  }
+
+  handler = events[type];
+
+  if (!handler)
+    return false;
+
+  var isFn = typeof handler === 'function';
+  len = arguments.length;
+  switch (len) {
+      // fast cases
+    case 1:
+      emitNone(handler, isFn, this);
+      break;
+    case 2:
+      emitOne(handler, isFn, this, arguments[1]);
+      break;
+    case 3:
+      emitTwo(handler, isFn, this, arguments[1], arguments[2]);
+      break;
+    case 4:
+      emitThree(handler, isFn, this, arguments[1], arguments[2], arguments[3]);
+      break;
+      // slower
+    default:
+      args = new Array(len - 1);
+      for (i = 1; i < len; i++)
+        args[i - 1] = arguments[i];
+      emitMany(handler, isFn, this, args);
+  }
+
+  return true;
+};
+
+function _addListener(target, type, listener, prepend) {
+  var m;
+  var events;
+  var existing;
+
+  if (typeof listener !== 'function')
+    throw new TypeError('"listener" argument must be a function');
+
+  events = target._events;
+  if (!events) {
+    events = target._events = objectCreate(null);
+    target._eventsCount = 0;
+  } else {
+    // To avoid recursion in the case that type === "newListener"! Before
+    // adding it to the listeners, first emit "newListener".
+    if (events.newListener) {
+      target.emit('newListener', type,
+          listener.listener ? listener.listener : listener);
+
+      // Re-assign `events` because a newListener handler could have caused the
+      // this._events to be assigned to a new object
+      events = target._events;
+    }
+    existing = events[type];
+  }
+
+  if (!existing) {
+    // Optimize the case of one listener. Don't need the extra array object.
+    existing = events[type] = listener;
+    ++target._eventsCount;
+  } else {
+    if (typeof existing === 'function') {
+      // Adding the second element, need to change to array.
+      existing = events[type] =
+          prepend ? [listener, existing] : [existing, listener];
+    } else {
+      // If we've already got an array, just append.
+      if (prepend) {
+        existing.unshift(listener);
+      } else {
+        existing.push(listener);
+      }
+    }
+
+    // Check for listener leak
+    if (!existing.warned) {
+      m = $getMaxListeners(target);
+      if (m && m > 0 && existing.length > m) {
+        existing.warned = true;
+        var w = new Error('Possible EventEmitter memory leak detected. ' +
+            existing.length + ' "' + String(type) + '" listeners ' +
+            'added. Use emitter.setMaxListeners() to ' +
+            'increase limit.');
+        w.name = 'MaxListenersExceededWarning';
+        w.emitter = target;
+        w.type = type;
+        w.count = existing.length;
+        if (typeof console === 'object' && console.warn) {
+          console.warn('%s: %s', w.name, w.message);
+        }
+      }
+    }
+  }
+
+  return target;
+}
+
+EventEmitter.prototype.addListener = function addListener(type, listener) {
+  return _addListener(this, type, listener, false);
+};
+
+EventEmitter.prototype.on = EventEmitter.prototype.addListener;
+
+EventEmitter.prototype.prependListener =
+    function prependListener(type, listener) {
+      return _addListener(this, type, listener, true);
+    };
+
+function onceWrapper() {
+  if (!this.fired) {
+    this.target.removeListener(this.type, this.wrapFn);
+    this.fired = true;
+    switch (arguments.length) {
+      case 0:
+        return this.listener.call(this.target);
+      case 1:
+        return this.listener.call(this.target, arguments[0]);
+      case 2:
+        return this.listener.call(this.target, arguments[0], arguments[1]);
+      case 3:
+        return this.listener.call(this.target, arguments[0], arguments[1],
+            arguments[2]);
+      default:
+        var args = new Array(arguments.length);
+        for (var i = 0; i < args.length; ++i)
+          args[i] = arguments[i];
+        this.listener.apply(this.target, args);
+    }
+  }
+}
+
+function _onceWrap(target, type, listener) {
+  var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
+  var wrapped = bind.call(onceWrapper, state);
+  wrapped.listener = listener;
+  state.wrapFn = wrapped;
+  return wrapped;
+}
+
+EventEmitter.prototype.once = function once(type, listener) {
+  if (typeof listener !== 'function')
+    throw new TypeError('"listener" argument must be a function');
+  this.on(type, _onceWrap(this, type, listener));
+  return this;
+};
+
+EventEmitter.prototype.prependOnceListener =
+    function prependOnceListener(type, listener) {
+      if (typeof listener !== 'function')
+        throw new TypeError('"listener" argument must be a function');
+      this.prependListener(type, _onceWrap(this, type, listener));
+      return this;
+    };
+
+// Emits a 'removeListener' event if and only if the listener was removed.
+EventEmitter.prototype.removeListener =
+    function removeListener(type, listener) {
+      var list, events, position, i, originalListener;
+
+      if (typeof listener !== 'function')
+        throw new TypeError('"listener" argument must be a function');
+
+      events = this._events;
+      if (!events)
+        return this;
+
+      list = events[type];
+      if (!list)
+        return this;
+
+      if (list === listener || list.listener === listener) {
+        if (--this._eventsCount === 0)
+          this._events = objectCreate(null);
+        else {
+          delete events[type];
+          if (events.removeListener)
+            this.emit('removeListener', type, list.listener || listener);
+        }
+      } else if (typeof list !== 'function') {
+        position = -1;
+
+        for (i = list.length - 1; i >= 0; i--) {
+          if (list[i] === listener || list[i].listener === listener) {
+            originalListener = list[i].listener;
+            position = i;
+            break;
+          }
+        }
+
+        if (position < 0)
+          return this;
+
+        if (position === 0)
+          list.shift();
+        else
+          spliceOne(list, position);
+
+        if (list.length === 1)
+          events[type] = list[0];
+
+        if (events.removeListener)
+          this.emit('removeListener', type, originalListener || listener);
+      }
+
+      return this;
+    };
+
+EventEmitter.prototype.removeAllListeners =
+    function removeAllListeners(type) {
+      var listeners, events, i;
+
+      events = this._events;
+      if (!events)
+        return this;
+
+      // not listening for removeListener, no need to emit
+      if (!events.removeListener) {
+        if (arguments.length === 0) {
+          this._events = objectCreate(null);
+          this._eventsCount = 0;
+        } else if (events[type]) {
+          if (--this._eventsCount === 0)
+            this._events = objectCreate(null);
+          else
+            delete events[type];
+        }
+        return this;
+      }
+
+      // emit removeListener for all listeners on all events
+      if (arguments.length === 0) {
+        var keys = objectKeys(events);
+        var key;
+        for (i = 0; i < keys.length; ++i) {
+          key = keys[i];
+          if (key === 'removeListener') continue;
+          this.removeAllListeners(key);
+        }
+        this.removeAllListeners('removeListener');
+        this._events = objectCreate(null);
+        this._eventsCount = 0;
+        return this;
+      }
+
+      listeners = events[type];
+
+      if (typeof listeners === 'function') {
+        this.removeListener(type, listeners);
+      } else if (listeners) {
+        // LIFO order
+        for (i = listeners.length - 1; i >= 0; i--) {
+          this.removeListener(type, listeners[i]);
+        }
+      }
+
+      return this;
+    };
+
+function _listeners(target, type, unwrap) {
+  var events = target._events;
+
+  if (!events)
+    return [];
+
+  var evlistener = events[type];
+  if (!evlistener)
+    return [];
+
+  if (typeof evlistener === 'function')
+    return unwrap ? [evlistener.listener || evlistener] : [evlistener];
+
+  return unwrap ? unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
+}
+
+EventEmitter.prototype.listeners = function listeners(type) {
+  return _listeners(this, type, true);
+};
+
+EventEmitter.prototype.rawListeners = function rawListeners(type) {
+  return _listeners(this, type, false);
+};
+
+EventEmitter.listenerCount = function(emitter, type) {
+  if (typeof emitter.listenerCount === 'function') {
+    return emitter.listenerCount(type);
+  } else {
+    return listenerCount.call(emitter, type);
+  }
+};
+
+EventEmitter.prototype.listenerCount = listenerCount;
+function listenerCount(type) {
+  var events = this._events;
+
+  if (events) {
+    var evlistener = events[type];
+
+    if (typeof evlistener === 'function') {
+      return 1;
+    } else if (evlistener) {
+      return evlistener.length;
+    }
+  }
+
+  return 0;
+}
+
+EventEmitter.prototype.eventNames = function eventNames() {
+  return this._eventsCount > 0 ? Reflect.ownKeys(this._events) : [];
+};
+
+// About 1.5x faster than the two-arg version of Array#splice().
+function spliceOne(list, index) {
+  for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1)
+    list[i] = list[k];
+  list.pop();
+}
+
+function arrayClone(arr, n) {
+  var copy = new Array(n);
+  for (var i = 0; i < n; ++i)
+    copy[i] = arr[i];
+  return copy;
+}
+
+function unwrapListeners(arr) {
+  var ret = new Array(arr.length);
+  for (var i = 0; i < ret.length; ++i) {
+    ret[i] = arr[i].listener || arr[i];
+  }
+  return ret;
+}
+
+function objectCreatePolyfill(proto) {
+  var F = function() {};
+  F.prototype = proto;
+  return new F;
+}
+function objectKeysPolyfill(obj) {
+  var keys = [];
+  for (var k in obj) if (Object.prototype.hasOwnProperty.call(obj, k)) {
+    keys.push(k);
+  }
+  return k;
+}
+function functionBindPolyfill(context) {
+  var fn = this;
+  return function () {
+    return fn.apply(context, arguments);
+  };
+}
+
+},{}],51:[function(require,module,exports){
+'use strict';
+
+/* eslint no-invalid-this: 1 */
+
+var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible ';
+var slice = Array.prototype.slice;
+var toStr = Object.prototype.toString;
+var funcType = '[object Function]';
+
+module.exports = function bind(that) {
+    var target = this;
+    if (typeof target !== 'function' || toStr.call(target) !== funcType) {
+        throw new TypeError(ERROR_MESSAGE + target);
+    }
+    var args = slice.call(arguments, 1);
+
+    var bound;
+    var binder = function () {
+        if (this instanceof bound) {
+            var result = target.apply(
+                this,
+                args.concat(slice.call(arguments))
+            );
+            if (Object(result) === result) {
+                return result;
+            }
+            return this;
+        } else {
+            return target.apply(
+                that,
+                args.concat(slice.call(arguments))
+            );
+        }
+    };
+
+    var boundLength = Math.max(0, target.length - args.length);
+    var boundArgs = [];
+    for (var i = 0; i < boundLength; i++) {
+        boundArgs.push('$' + i);
+    }
+
+    bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder);
+
+    if (target.prototype) {
+        var Empty = function Empty() {};
+        Empty.prototype = target.prototype;
+        bound.prototype = new Empty();
+        Empty.prototype = null;
+    }
+
+    return bound;
+};
+
+},{}],52:[function(require,module,exports){
+'use strict';
+
+var implementation = require('./implementation');
+
+module.exports = Function.prototype.bind || implementation;
+
+},{"./implementation":51}],53:[function(require,module,exports){
+'use strict';
+
+/* eslint complexity: [2, 17], max-statements: [2, 33] */
+module.exports = function hasSymbols() {
+	if (typeof Symbol !== 'function' || typeof Object.getOwnPropertySymbols !== 'function') { return false; }
+	if (typeof Symbol.iterator === 'symbol') { return true; }
+
+	var obj = {};
+	var sym = Symbol('test');
+	var symObj = Object(sym);
+	if (typeof sym === 'string') { return false; }
+
+	if (Object.prototype.toString.call(sym) !== '[object Symbol]') { return false; }
+	if (Object.prototype.toString.call(symObj) !== '[object Symbol]') { return false; }
+
+	// temp disabled per https://github.com/ljharb/object.assign/issues/17
+	// if (sym instanceof Symbol) { return false; }
+	// temp disabled per https://github.com/WebReflection/get-own-property-symbols/issues/4
+	// if (!(symObj instanceof Symbol)) { return false; }
+
+	// if (typeof Symbol.prototype.toString !== 'function') { return false; }
+	// if (String(sym) !== Symbol.prototype.toString.call(sym)) { return false; }
+
+	var symVal = 42;
+	obj[sym] = symVal;
+	for (sym in obj) { return false; } // eslint-disable-line no-restricted-syntax
+	if (typeof Object.keys === 'function' && Object.keys(obj).length !== 0) { return false; }
+
+	if (typeof Object.getOwnPropertyNames === 'function' && Object.getOwnPropertyNames(obj).length !== 0) { return false; }
+
+	var syms = Object.getOwnPropertySymbols(obj);
+	if (syms.length !== 1 || syms[0] !== sym) { return false; }
+
+	if (!Object.prototype.propertyIsEnumerable.call(obj, sym)) { return false; }
+
+	if (typeof Object.getOwnPropertyDescriptor === 'function') {
+		var descriptor = Object.getOwnPropertyDescriptor(obj, sym);
+		if (descriptor.value !== symVal || descriptor.enumerable !== true) { return false; }
+	}
+
+	return true;
+};
+
+},{}],54:[function(require,module,exports){
+(function (global){
+/*! https://mths.be/he v1.2.0 by @mathias | MIT license */
+;(function(root) {
+
+	// Detect free variables `exports`.
+	var freeExports = typeof exports == 'object' && exports;
+
+	// Detect free variable `module`.
+	var freeModule = typeof module == 'object' && module &&
+		module.exports == freeExports && module;
+
+	// Detect free variable `global`, from Node.js or Browserified code,
+	// and use it as `root`.
+	var freeGlobal = typeof global == 'object' && global;
+	if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
+		root = freeGlobal;
+	}
+
+	/*--------------------------------------------------------------------------*/
+
+	// All astral symbols.
+	var regexAstralSymbols = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
+	// All ASCII symbols (not just printable ASCII) except those listed in the
+	// first column of the overrides table.
+	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides
+	var regexAsciiWhitelist = /[\x01-\x7F]/g;
+	// All BMP symbols that are not ASCII newlines, printable ASCII symbols, or
+	// code points listed in the first column of the overrides table on
+	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides.
+	var regexBmpWhitelist = /[\x01-\t\x0B\f\x0E-\x1F\x7F\x81\x8D\x8F\x90\x9D\xA0-\uFFFF]/g;
+
+	var regexEncodeNonAscii = /<\u20D2|=\u20E5|>\u20D2|\u205F\u200A|\u219D\u0338|\u2202\u0338|\u2220\u20D2|\u2229\uFE00|\u222A\uFE00|\u223C\u20D2|\u223D\u0331|\u223E\u0333|\u2242\u0338|\u224B\u0338|\u224D\u20D2|\u224E\u0338|\u224F\u0338|\u2250\u0338|\u2261\u20E5|\u2264\u20D2|\u2265\u20D2|\u2266\u0338|\u2267\u0338|\u2268\uFE00|\u2269\uFE00|\u226A\u0338|\u226A\u20D2|\u226B\u0338|\u226B\u20D2|\u227F\u0338|\u2282\u20D2|\u2283\u20D2|\u228A\uFE00|\u228B\uFE00|\u228F\u0338|\u2290\u0338|\u2293\uFE00|\u2294\uFE00|\u22B4\u20D2|\u22B5\u20D2|\u22D8\u0338|\u22D9\u0338|\u22DA\uFE00|\u22DB\uFE00|\u22F5\u0338|\u22F9\u0338|\u2933\u0338|\u29CF\u0338|\u29D0\u0338|\u2A6D\u0338|\u2A70\u0338|\u2A7D\u0338|\u2A7E\u0338|\u2AA1\u0338|\u2AA2\u0338|\u2AAC\uFE00|\u2AAD\uFE00|\u2AAF\u0338|\u2AB0\u0338|\u2AC5\u0338|\u2AC6\u0338|\u2ACB\uFE00|\u2ACC\uFE00|\u2AFD\u20E5|[\xA0-\u0113\u0116-\u0122\u0124-\u012B\u012E-\u014D\u0150-\u017E\u0192\u01B5\u01F5\u0237\u02C6\u02C7\u02D8-\u02DD\u0311\u0391-\u03A1\u03A3-\u03A9\u03B1-\u03C9\u03D1\u03D2\u03D5\u03D6\u03DC\u03DD\u03F0\u03F1\u03F5\u03F6\u0401-\u040C\u040E-\u044F\u0451-\u045C\u045E\u045F\u2002-\u2005\u2007-\u2010\u2013-\u2016\u2018-\u201A\u201C-\u201E\u2020-\u2022\u2025\u2026\u2030-\u2035\u2039\u203A\u203E\u2041\u2043\u2044\u204F\u2057\u205F-\u2063\u20AC\u20DB\u20DC\u2102\u2105\u210A-\u2113\u2115-\u211E\u2122\u2124\u2127-\u2129\u212C\u212D\u212F-\u2131\u2133-\u2138\u2145-\u2148\u2153-\u215E\u2190-\u219B\u219D-\u21A7\u21A9-\u21AE\u21B0-\u21B3\u21B5-\u21B7\u21BA-\u21DB\u21DD\u21E4\u21E5\u21F5\u21FD-\u2205\u2207-\u2209\u220B\u220C\u220F-\u2214\u2216-\u2218\u221A\u221D-\u2238\u223A-\u2257\u2259\u225A\u225C\u225F-\u2262\u2264-\u228B\u228D-\u229B\u229D-\u22A5\u22A7-\u22B0\u22B2-\u22BB\u22BD-\u22DB\u22DE-\u22E3\u22E6-\u22F7\u22F9-\u22FE\u2305\u2306\u2308-\u2310\u2312\u2313\u2315\u2316\u231C-\u231F\u2322\u2323\u232D\u232E\u2336\u233D\u233F\u237C\u23B0\u23B1\u23B4-\u23B6\u23DC-\u23DF\u23E2\u23E7\u2423\u24C8\u2500\u2502\u250C\u2510\u2514\u2518\u251C\u2524\u252C\u2534\u253C\u2550-\u256C\u2580\u2584\u2588\u2591-\u2593\u25A1\u25AA\u25AB\u25AD\u25AE\u25B1\u25B3-\u25B5\u25B8\u25B9\u25BD-\u25BF\u25C2\u25C3\u25CA\u25CB\u25EC\u25EF\u25F8-\u25FC\u2605\u2606\u260E\u2640\u2642\u2660\u2663\u2665\u2666\u266A\u266D-\u266F\u2713\u2717\u2720\u2736\u2758\u2772\u2773\u27C8\u27C9\u27E6-\u27ED\u27F5-\u27FA\u27FC\u27FF\u2902-\u2905\u290C-\u2913\u2916\u2919-\u2920\u2923-\u292A\u2933\u2935-\u2939\u293C\u293D\u2945\u2948-\u294B\u294E-\u2976\u2978\u2979\u297B-\u297F\u2985\u2986\u298B-\u2996\u299A\u299C\u299D\u29A4-\u29B7\u29B9\u29BB\u29BC\u29BE-\u29C5\u29C9\u29CD-\u29D0\u29DC-\u29DE\u29E3-\u29E5\u29EB\u29F4\u29F6\u2A00-\u2A02\u2A04\u2A06\u2A0C\u2A0D\u2A10-\u2A17\u2A22-\u2A27\u2A29\u2A2A\u2A2D-\u2A31\u2A33-\u2A3C\u2A3F\u2A40\u2A42-\u2A4D\u2A50\u2A53-\u2A58\u2A5A-\u2A5D\u2A5F\u2A66\u2A6A\u2A6D-\u2A75\u2A77-\u2A9A\u2A9D-\u2AA2\u2AA4-\u2AB0\u2AB3-\u2AC8\u2ACB\u2ACC\u2ACF-\u2ADB\u2AE4\u2AE6-\u2AE9\u2AEB-\u2AF3\u2AFD\uFB00-\uFB04]|\uD835[\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDCCF\uDD04\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDD6B]/g;
+	var encodeMap = 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','\u2A73':'Esim','\u2A77':'eDDot','\u2A78':'equivDD','\u2A79':'ltcir','\u2A7A':'gtcir','\u2A7B':'ltquest','\u2A7C':'gtquest','\u2A7D':'les','\u2A7D\u0338':'nles','\u2A7E':'ges','\u2A7E\u0338':'nges','\u2A7F':'lesdot','\u2A80':'gesdot','\u2A81':'lesdoto','\u2A82':'gesdoto','\u2A83':'lesdotor','\u2A84':'gesdotol','\u2A85':'lap','\u2A86':'gap','\u2A87':'lne','\u2A88':'gne','\u2A89':'lnap','\u2A8A':'gnap','\u2A8B':'lEg','\u2A8C':'gEl','\u2A8D':'lsime','\u2A8E':'gsime','\u2A8F':'lsimg','\u2A90':'gsiml','\u2A91':'lgE','\u2A92':'glE','\u2A93':'lesges','\u2A94':'gesles','\u2A95':'els','\u2A96':'egs','\u2A97':'elsdot','\u2A98':'egsdot','\u2A99':'el','\u2A9A':'eg','\u2A9D':'siml','\u2A9E':'simg','\u2A9F':'simlE','\u2AA0':'simgE','\u2AA1':'LessLess','\u2AA1\u0338':'NotNestedLessLess','\u2AA2':'GreaterGreater','\u2AA2\u0338':'NotNestedGreaterGreater','\u2AA4':'glj','\u2AA5':'gla','\u2AA6':'ltcc','\u2AA7':'gtcc','\u2AA8':'lescc','\u2AA9':'gescc','\u2AAA':'smt','\u2AAB':'lat','\u2AAC':'smte','\u2AAC\uFE00':'smtes','\u2AAD':'late','\u2AAD\uFE00':'lates','\u2AAE':'bumpE','\u2AAF':'pre','\u2AAF\u0338':'npre','\u2AB0':'sce','\u2AB0\u0338':'nsce','\u2AB3':'prE','\u2AB4':'scE','\u2AB5':'prnE','\u2AB6':'scnE','\u2AB7':'prap','\u2AB8':'scap','\u2AB9':'prnap','\u2ABA':'scnap','\u2ABB':'Pr','\u2ABC':'Sc','\u2ABD':'subdot','\u2ABE':'supdot','\u2ABF':'subplus','\u2AC0':'supplus','\u2AC1':'submult','\u2AC2':'supmult','\u2AC3':'subedot','\u2AC4':'supedot','\u2AC5':'subE','\u2AC5\u0338':'nsubE','\u2AC6':'supE','\u2AC6\u0338':'nsupE','\u2AC7':'subsim','\u2AC8':'supsim','\u2ACB\uFE00':'vsubnE','\u2ACB':'subnE','\u2ACC\uFE00':'vsupnE','\u2ACC':'supnE','\u2ACF':'csub','\u2AD0':'csup','\u2AD1':'csube','\u2AD2':'csupe','\u2AD3':'subsup','\u2AD4':'supsub','\u2AD5':'subsub','\u2AD6':'supsup','\u2AD7':'suphsub','\u2AD8':'supdsub','\u2AD9':'forkv','\u2ADA':'topfork','\u2ADB':'mlcp','\u2AE4':'Dashv','\u2AE6':'Vdashl','\u2AE7':'Barv','\u2AE8':'vBar','\u2AE9':'vBarv','\u2AEB':'Vbar','\u2AEC':'Not','\u2AED':'bNot','\u2AEE':'rnmid','\u2AEF':'cirmid','\u2AF0':'midcir','\u2AF1':'topcir','\u2AF2':'nhpar','\u2AF3':'parsim','\u2AFD':'parsl','\u2AFD\u20E5':'nparsl','\u266D':'flat','\u266E':'natur','\u266F':'sharp','\xA4':'curren','\xA2':'cent','$':'dollar','\xA3':'pound','\xA5':'yen','\u20AC':'euro','\xB9':'sup1','\xBD':'half','\u2153':'frac13','\xBC':'frac14','\u2155':'frac15','\u2159':'frac16','\u215B':'frac18','\xB2':'sup2','\u2154':'frac23','\u2156':'frac25','\xB3':'sup3','\xBE':'frac34','\u2157':'frac35','\u215C':'frac38','\u2158':'frac45','\u215A':'frac56','\u215D':'frac58','\u215E':'frac78','\uD835\uDCB6':'ascr','\uD835\uDD52':'aopf','\uD835\uDD1E':'afr','\uD835\uDD38':'Aopf','\uD835\uDD04':'Afr','\uD835\uDC9C':'Ascr','\xAA':'ordf','\xE1':'aacute','\xC1':'Aacute','\xE0':'agrave','\xC0':'Agrave','\u0103':'abreve','\u0102':'Abreve','\xE2':'acirc','\xC2':'Acirc','\xE5':'aring','\xC5':'angst','\xE4':'auml','\xC4':'Auml','\xE3':'atilde','\xC3':'Atilde','\u0105':'aogon','\u0104':'Aogon','\u0101':'amacr','\u0100':'Amacr','\xE6':'aelig','\xC6':'AElig','\uD835\uDCB7':'bscr','\uD835\uDD53':'bopf','\uD835\uDD1F':'bfr','\uD835\uDD39':'Bopf','\u212C':'Bscr','\uD835\uDD05':'Bfr','\uD835\uDD20':'cfr','\uD835\uDCB8':'cscr','\uD835\uDD54':'copf','\u212D':'Cfr','\uD835\uDC9E':'Cscr','\u2102':'Copf','\u0107':'cacute','\u0106':'Cacute','\u0109':'ccirc','\u0108':'Ccirc','\u010D':'ccaron','\u010C':'Ccaron','\u010B':'cdot','\u010A':'Cdot','\xE7':'ccedil','\xC7':'Ccedil','\u2105':'incare','\uD835\uDD21':'dfr','\u2146':'dd','\uD835\uDD55':'dopf','\uD835\uDCB9':'dscr','\uD835\uDC9F':'Dscr','\uD835\uDD07':'Dfr','\u2145':'DD','\uD835\uDD3B':'Dopf','\u010F':'dcaron','\u010E':'Dcaron','\u0111':'dstrok','\u0110':'Dstrok','\xF0':'eth','\xD0':'ETH','\u2147':'ee','\u212F':'escr','\uD835\uDD22':'efr','\uD835\uDD56':'eopf','\u2130':'Escr','\uD835\uDD08':'Efr','\uD835\uDD3C':'Eopf','\xE9':'eacute','\xC9':'Eacute','\xE8':'egrave','\xC8':'Egrave','\xEA':'ecirc','\xCA':'Ecirc','\u011B':'ecaron','\u011A':'Ecaron','\xEB':'euml','\xCB':'Euml','\u0117':'edot','\u0116':'Edot','\u0119':'eogon','\u0118':'Eogon','\u0113':'emacr','\u0112':'Emacr','\uD835\uDD23':'ffr','\uD835\uDD57':'fopf','\uD835\uDCBB':'fscr','\uD835\uDD09':'Ffr','\uD835\uDD3D':'Fopf','\u2131':'Fscr','\uFB00':'fflig','\uFB03':'ffilig','\uFB04':'ffllig','\uFB01':'filig','fj':'fjlig','\uFB02':'fllig','\u0192':'fnof','\u210A':'gscr','\uD835\uDD58':'gopf','\uD835\uDD24':'gfr','\uD835\uDCA2':'Gscr','\uD835\uDD3E':'Gopf','\uD835\uDD0A':'Gfr','\u01F5':'gacute','\u011F':'gbreve','\u011E':'Gbreve','\u011D':'gcirc','\u011C':'Gcirc','\u0121':'gdot','\u0120':'Gdot','\u0122':'Gcedil','\uD835\uDD25':'hfr','\u210E':'planckh','\uD835\uDCBD':'hscr','\uD835\uDD59':'hopf','\u210B':'Hscr','\u210C':'Hfr','\u210D':'Hopf','\u0125':'hcirc','\u0124':'Hcirc','\u210F':'hbar','\u0127':'hstrok','\u0126':'Hstrok','\uD835\uDD5A':'iopf','\uD835\uDD26':'ifr','\uD835\uDCBE':'iscr','\u2148':'ii','\uD835\uDD40':'Iopf','\u2110':'Iscr','\u2111':'Im','\xED':'iacute','\xCD':'Iacute','\xEC':'igrave','\xCC':'Igrave','\xEE':'icirc','\xCE':'Icirc','\xEF':'iuml','\xCF':'Iuml','\u0129':'itilde','\u0128':'Itilde','\u0130':'Idot','\u012F':'iogon','\u012E':'Iogon','\u012B':'imacr','\u012A':'Imacr','\u0133':'ijlig','\u0132':'IJlig','\u0131':'imath','\uD835\uDCBF':'jscr','\uD835\uDD5B':'jopf','\uD835\uDD27':'jfr','\uD835\uDCA5':'Jscr','\uD835\uDD0D':'Jfr','\uD835\uDD41':'Jopf','\u0135':'jcirc','\u0134':'Jcirc','\u0237':'jmath','\uD835\uDD5C':'kopf','\uD835\uDCC0':'kscr','\uD835\uDD28':'kfr','\uD835\uDCA6':'Kscr','\uD835\uDD42':'Kopf','\uD835\uDD0E':'Kfr','\u0137':'kcedil','\u0136':'Kcedil','\uD835\uDD29':'lfr','\uD835\uDCC1':'lscr','\u2113':'ell','\uD835\uDD5D':'lopf','\u2112':'Lscr','\uD835\uDD0F':'Lfr','\uD835\uDD43':'Lopf','\u013A':'lacute','\u0139':'Lacute','\u013E':'lcaron','\u013D':'Lcaron','\u013C':'lcedil','\u013B':'Lcedil','\u0142':'lstrok','\u0141':'Lstrok','\u0140':'lmidot','\u013F':'Lmidot','\uD835\uDD2A':'mfr','\uD835\uDD5E':'mopf','\uD835\uDCC2':'mscr','\uD835\uDD10':'Mfr','\uD835\uDD44':'Mopf','\u2133':'Mscr','\uD835\uDD2B':'nfr','\uD835\uDD5F':'nopf','\uD835\uDCC3':'nscr','\u2115':'Nopf','\uD835\uDCA9':'Nscr','\uD835\uDD11':'Nfr','\u0144':'nacute','\u0143':'Nacute','\u0148':'ncaron','\u0147':'Ncaron','\xF1':'ntilde','\xD1':'Ntilde','\u0146':'ncedil','\u0145':'Ncedil','\u2116':'numero','\u014B':'eng','\u014A':'ENG','\uD835\uDD60':'oopf','\uD835\uDD2C':'ofr','\u2134':'oscr','\uD835\uDCAA':'Oscr','\uD835\uDD12':'Ofr','\uD835\uDD46':'Oopf','\xBA':'ordm','\xF3':'oacute','\xD3':'Oacute','\xF2':'ograve','\xD2':'Ograve','\xF4':'ocirc','\xD4':'Ocirc','\xF6':'ouml','\xD6':'Ouml','\u0151':'odblac','\u0150':'Odblac','\xF5':'otilde','\xD5':'Otilde','\xF8':'oslash','\xD8':'Oslash','\u014D':'omacr','\u014C':'Omacr','\u0153':'oelig','\u0152':'OElig','\uD835\uDD2D':'pfr','\uD835\uDCC5':'pscr','\uD835\uDD61':'popf','\u2119':'Popf','\uD835\uDD13':'Pfr','\uD835\uDCAB':'Pscr','\uD835\uDD62':'qopf','\uD835\uDD2E':'qfr','\uD835\uDCC6':'qscr','\uD835\uDCAC':'Qscr','\uD835\uDD14':'Qfr','\u211A':'Qopf','\u0138':'kgreen','\uD835\uDD2F':'rfr','\uD835\uDD63':'ropf','\uD835\uDCC7':'rscr','\u211B':'Rscr','\u211C':'Re','\u211D':'Ropf','\u0155':'racute','\u0154':'Racute','\u0159':'rcaron','\u0158':'Rcaron','\u0157':'rcedil','\u0156':'Rcedil','\uD835\uDD64':'sopf','\uD835\uDCC8':'sscr','\uD835\uDD30':'sfr','\uD835\uDD4A':'Sopf','\uD835\uDD16':'Sfr','\uD835\uDCAE':'Sscr','\u24C8':'oS','\u015B':'sacute','\u015A':'Sacute','\u015D':'scirc','\u015C':'Scirc','\u0161':'scaron','\u0160':'Scaron','\u015F':'scedil','\u015E':'Scedil','\xDF':'szlig','\uD835\uDD31':'tfr','\uD835\uDCC9':'tscr','\uD835\uDD65':'topf','\uD835\uDCAF':'Tscr','\uD835\uDD17':'Tfr','\uD835\uDD4B':'Topf','\u0165':'tcaron','\u0164':'Tcaron','\u0163':'tcedil','\u0162':'Tcedil','\u2122':'trade','\u0167':'tstrok','\u0166':'Tstrok','\uD835\uDCCA':'uscr','\uD835\uDD66':'uopf','\uD835\uDD32':'ufr','\uD835\uDD4C':'Uopf','\uD835\uDD18':'Ufr','\uD835\uDCB0':'Uscr','\xFA':'uacute','\xDA':'Uacute','\xF9':'ugrave','\xD9':'Ugrave','\u016D':'ubreve','\u016C':'Ubreve','\xFB':'ucirc','\xDB':'Ucirc','\u016F':'uring','\u016E':'Uring','\xFC':'uuml','\xDC':'Uuml','\u0171':'udblac','\u0170':'Udblac','\u0169':'utilde','\u0168':'Utilde','\u0173':'uogon','\u0172':'Uogon','\u016B':'umacr','\u016A':'Umacr','\uD835\uDD33':'vfr','\uD835\uDD67':'vopf','\uD835\uDCCB':'vscr','\uD835\uDD19':'Vfr','\uD835\uDD4D':'Vopf','\uD835\uDCB1':'Vscr','\uD835\uDD68':'wopf','\uD835\uDCCC':'wscr','\uD835\uDD34':'wfr','\uD835\uDCB2':'Wscr','\uD835\uDD4E':'Wopf','\uD835\uDD1A':'Wfr','\u0175':'wcirc','\u0174':'Wcirc','\uD835\uDD35':'xfr','\uD835\uDCCD':'xscr','\uD835\uDD69':'xopf','\uD835\uDD4F':'Xopf','\uD835\uDD1B':'Xfr','\uD835\uDCB3':'Xscr','\uD835\uDD36':'yfr','\uD835\uDCCE':'yscr','\uD835\uDD6A':'yopf','\uD835\uDCB4':'Yscr','\uD835\uDD1C':'Yfr','\uD835\uDD50':'Yopf','\xFD':'yacute','\xDD':'Yacute','\u0177':'ycirc','\u0176':'Ycirc','\xFF':'yuml','\u0178':'Yuml','\uD835\uDCCF':'zscr','\uD835\uDD37':'zfr','\uD835\uDD6B':'zopf','\u2128':'Zfr','\u2124':'Zopf','\uD835\uDCB5':'Zscr','\u017A':'zacute','\u0179':'Zacute','\u017E':'zcaron','\u017D':'Zcaron','\u017C':'zdot','\u017B':'Zdot','\u01B5':'imped','\xFE':'thorn','\xDE':'THORN','\u0149':'napos','\u03B1':'alpha','\u0391':'Alpha','\u03B2':'beta','\u0392':'Beta','\u03B3':'gamma','\u0393':'Gamma','\u03B4':'delta','\u0394':'Delta','\u03B5':'epsi','\u03F5':'epsiv','\u0395':'Epsilon','\u03DD':'gammad','\u03DC':'Gammad','\u03B6':'zeta','\u0396':'Zeta','\u03B7':'eta','\u0397':'Eta','\u03B8':'theta','\u03D1':'thetav','\u0398':'Theta','\u03B9':'iota','\u0399':'Iota','\u03BA':'kappa','\u03F0':'kappav','\u039A':'Kappa','\u03BB':'lambda','\u039B':'Lambda','\u03BC':'mu','\xB5':'micro','\u039C':'Mu','\u03BD':'nu','\u039D':'Nu','\u03BE':'xi','\u039E':'Xi','\u03BF':'omicron','\u039F':'Omicron','\u03C0':'pi','\u03D6':'piv','\u03A0':'Pi','\u03C1':'rho','\u03F1':'rhov','\u03A1':'Rho','\u03C3':'sigma','\u03A3':'Sigma','\u03C2':'sigmaf','\u03C4':'tau','\u03A4':'Tau','\u03C5':'upsi','\u03A5':'Upsilon','\u03D2':'Upsi','\u03C6':'phi','\u03D5':'phiv','\u03A6':'Phi','\u03C7':'chi','\u03A7':'Chi','\u03C8':'psi','\u03A8':'Psi','\u03C9':'omega','\u03A9':'ohm','\u0430':'acy','\u0410':'Acy','\u0431':'bcy','\u0411':'Bcy','\u0432':'vcy','\u0412':'Vcy','\u0433':'gcy','\u0413':'Gcy','\u0453':'gjcy','\u0403':'GJcy','\u0434':'dcy','\u0414':'Dcy','\u0452':'djcy','\u0402':'DJcy','\u0435':'iecy','\u0415':'IEcy','\u0451':'iocy','\u0401':'IOcy','\u0454':'jukcy','\u0404':'Jukcy','\u0436':'zhcy','\u0416':'ZHcy','\u0437':'zcy','\u0417':'Zcy','\u0455':'dscy','\u0405':'DScy','\u0438':'icy','\u0418':'Icy','\u0456':'iukcy','\u0406':'Iukcy','\u0457':'yicy','\u0407':'YIcy','\u0439':'jcy','\u0419':'Jcy','\u0458':'jsercy','\u0408':'Jsercy','\u043A':'kcy','\u041A':'Kcy','\u045C':'kjcy','\u040C':'KJcy','\u043B':'lcy','\u041B':'Lcy','\u0459':'ljcy','\u0409':'LJcy','\u043C':'mcy','\u041C':'Mcy','\u043D':'ncy','\u041D':'Ncy','\u045A':'njcy','\u040A':'NJcy','\u043E':'ocy','\u041E':'Ocy','\u043F':'pcy','\u041F':'Pcy','\u0440':'rcy','\u0420':'Rcy','\u0441':'scy','\u0421':'Scy','\u0442':'tcy','\u0422':'Tcy','\u045B':'tshcy','\u040B':'TSHcy','\u0443':'ucy','\u0423':'Ucy','\u045E':'ubrcy','\u040E':'Ubrcy','\u0444':'fcy','\u0424':'Fcy','\u0445':'khcy','\u0425':'KHcy','\u0446':'tscy','\u0426':'TScy','\u0447':'chcy','\u0427':'CHcy','\u045F':'dzcy','\u040F':'DZcy','\u0448':'shcy','\u0428':'SHcy','\u0449':'shchcy','\u0429':'SHCHcy','\u044A':'hardcy','\u042A':'HARDcy','\u044B':'ycy','\u042B':'Ycy','\u044C':'softcy','\u042C':'SOFTcy','\u044D':'ecy','\u042D':'Ecy','\u044E':'yucy','\u042E':'YUcy','\u044F':'yacy','\u042F':'YAcy','\u2135':'aleph','\u2136':'beth','\u2137':'gimel','\u2138':'daleth'};
+
+	var regexEscape = /["&'<>`]/g;
+	var escapeMap = {
+		'"': '&quot;',
+		'&': '&amp;',
+		'\'': '&#x27;',
+		'<': '&lt;',
+		// See https://mathiasbynens.be/notes/ambiguous-ampersands: in HTML, the
+		// following is not strictly necessary unless it’s part of a tag or an
+		// unquoted attribute value. We’re only escaping it to support those
+		// situations, and for XML support.
+		'>': '&gt;',
+		// In Internet Explorer ≤ 8, the backtick character can be used
+		// to break out of (un)quoted attribute values or HTML comments.
+		// See http://html5sec.org/#102, http://html5sec.org/#108, and
+		// http://html5sec.org/#133.
+		'`': '&#x60;'
+	};
+
+	var regexInvalidEntity = /&#(?:[xX][^a-fA-F0-9]|[^0-9xX])/;
+	var regexInvalidRawCodePoint = /[\0-\x08\x0B\x0E-\x1F\x7F-\x9F\uFDD0-\uFDEF\uFFFE\uFFFF]|[\uD83F\uD87F\uD8BF\uD8FF\uD93F\uD97F\uD9BF\uD9FF\uDA3F\uDA7F\uDABF\uDAFF\uDB3F\uDB7F\uDBBF\uDBFF][\uDFFE\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
+	var regexDecode = /&(CounterClockwiseContourIntegral|DoubleLongLeftRightArrow|ClockwiseContourIntegral|NotNestedGreaterGreater|NotSquareSupersetEqual|DiacriticalDoubleAcute|NotRightTriangleEqual|NotSucceedsSlantEqual|NotPrecedesSlantEqual|CloseCurlyDoubleQuote|NegativeVeryThinSpace|DoubleContourIntegral|FilledVerySmallSquare|CapitalDifferentialD|OpenCurlyDoubleQuote|EmptyVerySmallSquare|NestedGreaterGreater|DoubleLongRightArrow|NotLeftTriangleEqual|NotGreaterSlantEqual|ReverseUpEquilibrium|DoubleLeftRightArrow|NotSquareSubsetEqual|NotDoubleVerticalBar|RightArrowLeftArrow|NotGreaterFullEqual|NotRightTriangleBar|SquareSupersetEqual|DownLeftRightVector|DoubleLongLeftArrow|leftrightsquigarrow|LeftArrowRightArrow|NegativeMediumSpace|blacktriangleright|RightDownVectorBar|PrecedesSlantEqual|RightDoubleBracket|SucceedsSlantEqual|NotLeftTriangleBar|RightTriangleEqual|SquareIntersection|RightDownTeeVector|ReverseEquilibrium|NegativeThickSpace|longleftrightarrow|Longleftrightarrow|LongLeftRightArrow|DownRightTeeVector|DownRightVectorBar|GreaterSlantEqual|SquareSubsetEqual|LeftDownVectorBar|LeftDoubleBracket|VerticalSeparator|rightleftharpoons|NotGreaterGreater|NotSquareSuperset|blacktriangleleft|blacktriangledown|NegativeThinSpace|LeftDownTeeVector|NotLessSlantEqual|leftrightharpoons|DoubleUpDownArrow|DoubleVerticalBar|LeftTriangleEqual|FilledSmallSquare|twoheadrightarrow|NotNestedLessLess|DownLeftTeeVector|DownLeftVectorBar|RightAngleBracket|NotTildeFullEqual|NotReverseElement|RightUpDownVector|DiacriticalTilde|NotSucceedsTilde|circlearrowright|NotPrecedesEqual|rightharpoondown|DoubleRightArrow|NotSucceedsEqual|NonBreakingSpace|NotRightTriangle|LessEqualGreater|RightUpTeeVector|LeftAngleBracket|GreaterFullEqual|DownArrowUpArrow|RightUpVectorBar|twoheadleftarrow|GreaterEqualLess|downharpoonright|RightTriangleBar|ntrianglerighteq|NotSupersetEqual|LeftUpDownVector|DiacriticalAcute|rightrightarrows|vartriangleright|UpArrowDownArrow|DiacriticalGrave|UnderParenthesis|EmptySmallSquare|LeftUpVectorBar|leftrightarrows|DownRightVector|downharpoonleft|trianglerighteq|ShortRightArrow|OverParenthesis|DoubleLeftArrow|DoubleDownArrow|NotSquareSubset|bigtriangledown|ntrianglelefteq|UpperRightArrow|curvearrowright|vartriangleleft|NotLeftTriangle|nleftrightarrow|LowerRightArrow|NotHumpDownHump|NotGreaterTilde|rightthreetimes|LeftUpTeeVector|NotGreaterEqual|straightepsilon|LeftTriangleBar|rightsquigarrow|ContourIntegral|rightleftarrows|CloseCurlyQuote|RightDownVector|LeftRightVector|nLeftrightarrow|leftharpoondown|circlearrowleft|SquareSuperset|OpenCurlyQuote|hookrightarrow|HorizontalLine|DiacriticalDot|NotLessGreater|ntriangleright|DoubleRightTee|InvisibleComma|InvisibleTimes|LowerLeftArrow|DownLeftVector|NotSubsetEqual|curvearrowleft|trianglelefteq|NotVerticalBar|TildeFullEqual|downdownarrows|NotGreaterLess|RightTeeVector|ZeroWidthSpace|looparrowright|LongRightArrow|doublebarwedge|ShortLeftArrow|ShortDownArrow|RightVectorBar|GreaterGreater|ReverseElement|rightharpoonup|LessSlantEqual|leftthreetimes|upharpoonright|rightarrowtail|LeftDownVector|Longrightarrow|NestedLessLess|UpperLeftArrow|nshortparallel|leftleftarrows|leftrightarrow|Leftrightarrow|LeftRightArrow|longrightarrow|upharpoonleft|RightArrowBar|ApplyFunction|LeftTeeVector|leftarrowtail|NotEqualTilde|varsubsetneqq|varsupsetneqq|RightTeeArrow|SucceedsEqual|SucceedsTilde|LeftVectorBar|SupersetEqual|hookleftarrow|DifferentialD|VerticalTilde|VeryThinSpace|blacktriangle|bigtriangleup|LessFullEqual|divideontimes|leftharpoonup|UpEquilibrium|ntriangleleft|RightTriangle|measuredangle|shortparallel|longleftarrow|Longleftarrow|LongLeftArrow|DoubleLeftTee|Poincareplane|PrecedesEqual|triangleright|DoubleUpArrow|RightUpVector|fallingdotseq|looparrowleft|PrecedesTilde|NotTildeEqual|NotTildeTilde|smallsetminus|Proportional|triangleleft|triangledown|UnderBracket|NotHumpEqual|exponentiale|ExponentialE|NotLessTilde|HilbertSpace|RightCeiling|blacklozenge|varsupsetneq|HumpDownHump|GreaterEqual|VerticalLine|LeftTeeArrow|NotLessEqual|DownTeeArrow|LeftTriangle|varsubsetneq|Intersection|NotCongruent|DownArrowBar|LeftUpVector|LeftArrowBar|risingdotseq|GreaterTilde|RoundImplies|SquareSubset|ShortUpArrow|NotSuperset|quaternions|precnapprox|backepsilon|preccurlyeq|OverBracket|blacksquare|MediumSpace|VerticalBar|circledcirc|circleddash|CircleMinus|CircleTimes|LessGreater|curlyeqprec|curlyeqsucc|diamondsuit|UpDownArrow|Updownarrow|RuleDelayed|Rrightarrow|updownarrow|RightVector|nRightarrow|nrightarrow|eqslantless|LeftCeiling|Equilibrium|SmallCircle|expectation|NotSucceeds|thickapprox|GreaterLess|SquareUnion|NotPrecedes|NotLessLess|straightphi|succnapprox|succcurlyeq|SubsetEqual|sqsupseteq|Proportion|Laplacetrf|ImaginaryI|supsetneqq|NotGreater|gtreqqless|NotElement|ThickSpace|TildeEqual|TildeTilde|Fouriertrf|rmoustache|EqualTilde|eqslantgtr|UnderBrace|LeftVector|UpArrowBar|nLeftarrow|nsubseteqq|subsetneqq|nsupseteqq|nleftarrow|succapprox|lessapprox|UpTeeArrow|upuparrows|curlywedge|lesseqqgtr|varepsilon|varnothing|RightFloor|c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|Fscr|gdot|gsim|Gscr|gscr|Gopf|gopf|gneq|Gdot|tosa|gnap|Topf|topf|geqq|toea|GJcy|gjcy|tint|gesl|mid|Sfr|ggg|top|ges|gla|glE|glj|geq|gne|gEl|gel|gnE|Gcy|gcy|gap|Tfr|tfr|Tcy|tcy|Hat|Tau|Ffr|tau|Tab|hfr|Hfr|ffr|Fcy|fcy|icy|Icy|iff|ETH|eth|ifr|Ifr|Eta|eta|int|Int|Sup|sup|ucy|Ucy|Sum|sum|jcy|ENG|ufr|Ufr|eng|Jcy|jfr|els|ell|egs|Efr|efr|Jfr|uml|kcy|Kcy|Ecy|ecy|kfr|Kfr|lap|Sub|sub|lat|lcy|Lcy|leg|Dot|dot|lEg|leq|les|squ|div|die|lfr|Lfr|lgE|Dfr|dfr|Del|deg|Dcy|dcy|lne|lnE|sol|loz|smt|Cup|lrm|cup|lsh|Lsh|sim|shy|map|Map|mcy|Mcy|mfr|Mfr|mho|gfr|Gfr|sfr|cir|Chi|chi|nap|Cfr|vcy|Vcy|cfr|Scy|scy|ncy|Ncy|vee|Vee|Cap|cap|nfr|scE|sce|Nfr|nge|ngE|nGg|vfr|Vfr|ngt|bot|nGt|nis|niv|Rsh|rsh|nle|nlE|bne|Bfr|bfr|nLl|nlt|nLt|Bcy|bcy|not|Not|rlm|wfr|Wfr|npr|nsc|num|ocy|ast|Ocy|ofr|xfr|Xfr|Ofr|ogt|ohm|apE|olt|Rho|ape|rho|Rfr|rfr|ord|REG|ang|reg|orv|And|and|AMP|Rcy|amp|Afr|ycy|Ycy|yen|yfr|Yfr|rcy|par|pcy|Pcy|pfr|Pfr|phi|Phi|afr|Acy|acy|zcy|Zcy|piv|acE|acd|zfr|Zfr|pre|prE|psi|Psi|qfr|Qfr|zwj|Or|ge|Gg|gt|gg|el|oS|lt|Lt|LT|Re|lg|gl|eg|ne|Im|it|le|DD|wp|wr|nu|Nu|dd|lE|Sc|sc|pi|Pi|ee|af|ll|Ll|rx|gE|xi|pm|Xi|ic|pr|Pr|in|ni|mp|mu|ac|Mu|or|ap|Gt|GT|ii);|&(Aacute|Agrave|Atilde|Ccedil|Eacute|Egrave|Iacute|Igrave|Ntilde|Oacute|Ograve|Oslash|Otilde|Uacute|Ugrave|Yacute|aacute|agrave|atilde|brvbar|ccedil|curren|divide|eacute|egrave|frac12|frac14|frac34|iacute|igrave|iquest|middot|ntilde|oacute|ograve|oslash|otilde|plusmn|uacute|ugrave|yacute|AElig|Acirc|Aring|Ecirc|Icirc|Ocirc|THORN|Ucirc|acirc|acute|aelig|aring|cedil|ecirc|icirc|iexcl|laquo|micro|ocirc|pound|raquo|szlig|thorn|times|ucirc|Auml|COPY|Euml|Iuml|Ouml|QUOT|Uuml|auml|cent|copy|euml|iuml|macr|nbsp|ordf|ordm|ouml|para|quot|sect|sup1|sup2|sup3|uuml|yuml|AMP|ETH|REG|amp|deg|eth|not|reg|shy|uml|yen|GT|LT|gt|lt)(?!;)([=a-zA-Z0-9]?)|&#([0-9]+)(;?)|&#[xX]([a-fA-F0-9]+)(;?)|&([0-9a-zA-Z]+)/g;
+	var decodeMap = {'aacute':'\xE1','Aacute':'\xC1','abreve':'\u0103','Abreve':'\u0102','ac':'\u223E','acd':'\u223F','acE':'\u223E\u0333','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','acy':'\u0430','Acy':'\u0410','aelig':'\xE6','AElig':'\xC6','af':'\u2061','afr':'\uD835\uDD1E','Afr':'\uD835\uDD04','agrave':'\xE0','Agrave':'\xC0','alefsym':'\u2135','aleph':'\u2135','alpha':'\u03B1','Alpha':'\u0391','amacr':'\u0101','Amacr':'\u0100','amalg':'\u2A3F','amp':'&','AMP':'&','and':'\u2227','And':'\u2A53','andand':'\u2A55','andd':'\u2A5C','andslope':'\u2A58','andv':'\u2A5A','ang':'\u2220','ange':'\u29A4','angle':'\u2220','angmsd':'\u2221','angmsdaa':'\u29A8','angmsdab':'\u29A9','angmsdac':'\u29AA','angmsdad':'\u29AB','angmsdae':'\u29AC','angmsdaf':'\u29AD','angmsdag':'\u29AE','angmsdah':'\u29AF','angrt':'\u221F','angrtvb':'\u22BE','angrtvbd':'\u299D','angsph':'\u2222','angst':'\xC5','angzarr':'\u237C','aogon':'\u0105','Aogon':'\u0104','aopf':'\uD835\uDD52','Aopf':'\uD835\uDD38','ap':'\u2248','apacir':'\u2A6F','ape':'\u224A','apE':'\u2A70','apid':'\u224B','apos':'\'','ApplyFunction':'\u2061','approx':'\u2248','approxeq':'\u224A','aring':'\xE5','Aring':'\xC5','ascr':'\uD835\uDCB6','Ascr':'\uD835\uDC9C','Assign':'\u2254','ast':'*','asymp':'\u2248','asympeq':'\u224D','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','awconint':'\u2233','awint':'\u2A11','backcong':'\u224C','backepsilon':'\u03F6','backprime':'\u2035','backsim':'\u223D','backsimeq':'\u22CD','Backslash':'\u2216','Barv':'\u2AE7','barvee':'\u22BD','barwed':'\u2305','Barwed':'\u2306','barwedge':'\u2305','bbrk':'\u23B5','bbrktbrk':'\u23B6','bcong':'\u224C','bcy':'\u0431','Bcy':'\u0411','bdquo':'\u201E','becaus':'\u2235','because':'\u2235','Because':'\u2235','bemptyv':'\u29B0','bepsi':'\u03F6','bernou':'\u212C','Bernoullis':'\u212C','beta':'\u03B2','Beta':'\u0392','beth':'\u2136','between':'\u226C','bfr':'\uD835\uDD1F','Bfr':'\uD835\uDD05','bigcap':'\u22C2','bigcirc':'\u25EF','bigcup':'\u22C3','bigodot':'\u2A00','bigoplus':'\u2A01','bigotimes':'\u2A02','bigsqcup':'\u2A06','bigstar':'\u2605','bigtriangledown':'\u25BD','bigtriangleup':'\u25B3','biguplus':'\u2A04','bigvee':'\u22C1','bigwedge':'\u22C0','bkarow':'\u290D','blacklozenge':'\u29EB','blacksquare':'\u25AA','blacktriangle':'\u25B4','blacktriangledown':'\u25BE','blacktriangleleft':'\u25C2','blacktriangleright':'\u25B8','blank':'\u2423','blk12':'\u2592','blk14':'\u2591','blk34':'\u2593','block':'\u2588','bne':'=\u20E5','bnequiv':'\u2261\u20E5','bnot':'\u2310','bNot':'\u2AED','bopf':'\uD835\uDD53','Bopf':'\uD835\uDD39','bot':'\u22A5','bottom':'\u22A5','bowtie':'\u22C8','boxbox':'\u29C9','boxdl':'\u2510','boxdL':'\u2555','boxDl':'\u2556','boxDL':'\u2557','boxdr':'\u250C','boxdR':'\u2552','boxDr':'\u2553','boxDR':'\u2554','boxh':'\u2500','boxH':'\u2550','boxhd':'\u252C','boxhD':'\u2565','boxHd':'\u2564','boxHD':'\u2566','boxhu':'\u2534','boxhU':'\u2568','boxHu':'\u2567','boxHU':'\u2569','boxminus':'\u229F','boxplus':'\u229E','boxtimes':'\u22A0','boxul':'\u2518','boxuL':'\u255B','boxUl':'\u255C','boxUL':'\u255D','boxur':'\u2514','boxuR':'\u2558','boxUr':'\u2559','boxUR':'\u255A','boxv':'\u2502','boxV':'\u2551','boxvh':'\u253C','boxvH':'\u256A','boxVh':'\u256B','boxVH':'\u256C','boxvl':'\u2524','boxvL':'\u2561','boxVl':'\u2562','boxVL':'\u2563','boxvr':'\u251C','boxvR':'\u255E','boxVr':'\u255F','boxVR':'\u2560','bprime':'\u2035','breve':'\u02D8','Breve':'\u02D8','brvbar':'\xA6','bscr':'\uD835\uDCB7','Bscr':'\u212C','bsemi':'\u204F','bsim':'\u223D','bsime':'\u22CD','bsol':'\\','bsolb':'\u29C5','bsolhsub':'\u27C8','bull':'\u2022','bullet':'\u2022','bump':'\u224E','bumpe':'\u224F','bumpE':'\u2AAE','bumpeq':'\u224F','Bumpeq':'\u224E','cacute':'\u0107','Cacute':'\u0106','cap':'\u2229','Cap':'\u22D2','capand':'\u2A44','capbrcup':'\u2A49','capcap':'\u2A4B','capcup':'\u2A47','capdot':'\u2A40','CapitalDifferentialD':'\u2145','caps':'\u2229\uFE00','caret':'\u2041','caron':'\u02C7','Cayleys':'\u212D','ccaps':'\u2A4D','ccaron':'\u010D','Ccaron':'\u010C','ccedil':'\xE7','Ccedil':'\xC7','ccirc':'\u0109','Ccirc':'\u0108','Cconint':'\u2230','ccups':'\u2A4C','ccupssm':'\u2A50','cdot':'\u010B','Cdot':'\u010A','cedil':'\xB8','Cedilla':'\xB8','cemptyv':'\u29B2','cent':'\xA2','centerdot':'\xB7','CenterDot':'\xB7','cfr':'\uD835\uDD20','Cfr':'\u212D','chcy':'\u0447','CHcy':'\u0427','check':'\u2713','checkmark':'\u2713','chi':'\u03C7','Chi':'\u03A7','cir':'\u25CB','circ':'\u02C6','circeq':'\u2257','circlearrowleft':'\u21BA','circlearrowright':'\u21BB','circledast':'\u229B','circledcirc':'\u229A','circleddash':'\u229D','CircleDot':'\u2299','circledR':'\xAE','circledS':'\u24C8','CircleMinus':'\u2296','CirclePlus':'\u2295','CircleTimes':'\u2297','cire':'\u2257','cirE':'\u29C3','cirfnint':'\u2A10','cirmid':'\u2AEF','cirscir':'\u29C2','ClockwiseContourIntegral':'\u2232','CloseCurlyDoubleQuote':'\u201D','CloseCurlyQuote':'\u2019','clubs':'\u2663','clubsuit':'\u2663','colon':':','Colon':'\u2237','colone':'\u2254','Colone':'\u2A74','coloneq':'\u2254','comma':',','commat':'@','comp':'\u2201','compfn':'\u2218','complement':'\u2201','complexes':'\u2102','cong':'\u2245','congdot':'\u2A6D','Congruent':'\u2261','conint':'\u222E','Conint':'\u222F','ContourIntegral':'\u222E','copf':'\uD835\uDD54','Copf':'\u2102','coprod':'\u2210','Coproduct':'\u2210','copy':'\xA9','COPY':'\xA9','copysr':'\u2117','CounterClockwiseContourIntegral':'\u2233','crarr':'\u21B5','cross':'\u2717','Cross':'\u2A2F','cscr':'\uD835\uDCB8','Cscr':'\uD835\uDC9E','csub':'\u2ACF','csube':'\u2AD1','csup':'\u2AD0','csupe':'\u2AD2','ctdot':'\u22EF','cudarrl':'\u2938','cudarrr':'\u2935','cuepr':'\u22DE','cuesc':'\u22DF','cularr':'\u21B6','cularrp':'\u293D','cup':'\u222A','Cup':'\u22D3','cupbrcap':'\u2A48','cupcap':'\u2A46','CupCap':'\u224D','cupcup':'\u2A4A','cupdot':'\u228D','cupor':'\u2A45','cups':'\u222A\uFE00','curarr':'\u21B7','curarrm':'\u293C','curlyeqprec':'\u22DE','curlyeqsucc':'\u22DF','curlyvee':'\u22CE','curlywedge':'\u22CF','curren':'\xA4','curvearrowleft':'\u21B6','curvearrowright':'\u21B7','cuvee':'\u22CE','cuwed':'\u22CF','cwconint':'\u2232','cwint':'\u2231','cylcty':'\u232D','dagger':'\u2020','Dagger':'\u2021','daleth':'\u2138','darr':'\u2193','dArr':'\u21D3','Darr':'\u21A1','dash':'\u2010','dashv':'\u22A3','Dashv':'\u2AE4','dbkarow':'\u290F','dblac':'\u02DD','dcaron':'\u010F','Dcaron':'\u010E','dcy':'\u0434','Dcy':'\u0414','dd':'\u2146','DD':'\u2145','ddagger':'\u2021','ddarr':'\u21CA','DDotrahd':'\u2911','ddotseq':'\u2A77','deg':'\xB0','Del':'\u2207','delta':'\u03B4','Delta':'\u0394','demptyv':'\u29B1','dfisht':'\u297F','dfr':'\uD835\uDD21','Dfr':'\uD835\uDD07','dHar':'\u2965','dharl':'\u21C3','dharr':'\u21C2','DiacriticalAcute':'\xB4','DiacriticalDot':'\u02D9','DiacriticalDoubleAcute':'\u02DD','DiacriticalGrave':'`','DiacriticalTilde':'\u02DC','diam':'\u22C4','diamond':'\u22C4','Diamond':'\u22C4','diamondsuit':'\u2666','diams':'\u2666','die':'\xA8','DifferentialD':'\u2146','digamma':'\u03DD','disin':'\u22F2','div':'\xF7','divide':'\xF7','divideontimes':'\u22C7','divonx':'\u22C7','djcy':'\u0452','DJcy':'\u0402','dlcorn':'\u231E','dlcrop':'\u230D','dollar':'$','dopf':'\uD835\uDD55','Dopf':'\uD835\uDD3B','dot':'\u02D9','Dot':'\xA8','DotDot':'\u20DC','doteq':'\u2250','doteqdot':'\u2251','DotEqual':'\u2250','dotminus':'\u2238','dotplus':'\u2214','dotsquare':'\u22A1','doublebarwedge':'\u2306','DoubleContourIntegral':'\u222F','DoubleDot':'\xA8','DoubleDownArrow':'\u21D3','DoubleLeftArrow':'\u21D0','DoubleLeftRightArrow':'\u21D4','DoubleLeftTee':'\u2AE4','DoubleLongLeftArrow':'\u27F8','DoubleLongLeftRightArrow':'\u27FA','DoubleLongRightArrow':'\u27F9','DoubleRightArrow':'\u21D2','DoubleRightTee':'\u22A8','DoubleUpArrow':'\u21D1','DoubleUpDownArrow':'\u21D5','DoubleVerticalBar':'\u2225','downarrow':'\u2193','Downarrow':'\u21D3','DownArrow':'\u2193','DownArrowBar':'\u2913','DownArrowUpArrow':'\u21F5','DownBreve':'\u0311','downdownarrows':'\u21CA','downharpoonleft':'\u21C3','downharpoonright':'\u21C2','DownLeftRightVector':'\u2950','DownLeftTeeVector':'\u295E','DownLeftVector':'\u21BD','DownLeftVectorBar':'\u2956','DownRightTeeVector':'\u295F','DownRightVector':'\u21C1','DownRightVectorBar':'\u2957','DownTee':'\u22A4','DownTeeArrow':'\u21A7','drbkarow':'\u2910','drcorn':'\u231F','drcrop':'\u230C','dscr':'\uD835\uDCB9','Dscr':'\uD835\uDC9F','dscy':'\u0455','DScy':'\u0405','dsol':'\u29F6','dstrok':'\u0111','Dstrok':'\u0110','dtdot':'\u22F1','dtri':'\u25BF','dtrif':'\u25BE','duarr':'\u21F5','duhar':'\u296F','dwangle':'\u29A6','dzcy':'\u045F','DZcy':'\u040F','dzigrarr':'\u27FF','eacute':'\xE9','Eacute':'\xC9','easter':'\u2A6E','ecaron':'\u011B','Ecaron':'\u011A','ecir':'\u2256','ecirc':'\xEA','Ecirc':'\xCA','ecolon':'\u2255','ecy':'\u044D','Ecy':'\u042D','eDDot':'\u2A77','edot':'\u0117','eDot':'\u2251','Edot':'\u0116','ee':'\u2147','efDot':'\u2252','efr':'\uD835\uDD22','Efr':'\uD835\uDD08','eg':'\u2A9A','egrave':'\xE8','Egrave':'\xC8','egs':'\u2A96','egsdot':'\u2A98','el':'\u2A99','Element':'\u2208','elinters':'\u23E7','ell':'\u2113','els':'\u2A95','elsdot':'\u2A97','emacr':'\u0113','Emacr':'\u0112','empty':'\u2205','emptyset':'\u2205','EmptySmallSquare':'\u25FB','emptyv':'\u2205','EmptyVerySmallSquare':'\u25AB','emsp':'\u2003','emsp13':'\u2004','emsp14':'\u2005','eng':'\u014B','ENG':'\u014A','ensp':'\u2002','eogon':'\u0119','Eogon':'\u0118','eopf':'\uD835\uDD56','Eopf':'\uD835\uDD3C','epar':'\u22D5','eparsl':'\u29E3','eplus':'\u2A71','epsi':'\u03B5','epsilon':'\u03B5','Epsilon':'\u0395','epsiv':'\u03F5','eqcirc':'\u2256','eqcolon':'\u2255','eqsim':'\u2242','eqslantgtr':'\u2A96','eqslantless':'\u2A95','Equal':'\u2A75','equals':'=','EqualTilde':'\u2242','equest':'\u225F','Equilibrium':'\u21CC','equiv':'\u2261','equivDD':'\u2A78','eqvparsl':'\u29E5','erarr':'\u2971','erDot':'\u2253','escr':'\u212F','Escr':'\u2130','esdot':'\u2250','esim':'\u2242','Esim':'\u2A73','eta':'\u03B7','Eta':'\u0397','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','euro':'\u20AC','excl':'!','exist':'\u2203','Exists':'\u2203','expectation':'\u2130','exponentiale':'\u2147','ExponentialE':'\u2147','fallingdotseq':'\u2252','fcy':'\u0444','Fcy':'\u0424','female':'\u2640','ffilig':'\uFB03','fflig':'\uFB00','ffllig':'\uFB04','ffr':'\uD835\uDD23','Ffr':'\uD835\uDD09','filig':'\uFB01','FilledSmallSquare':'\u25FC','FilledVerySmallSquare':'\u25AA','fjlig':'fj','flat':'\u266D','fllig':'\uFB02','fltns':'\u25B1','fnof':'\u0192','fopf':'\uD835\uDD57','Fopf':'\uD835\uDD3D','forall':'\u2200','ForAll':'\u2200','fork':'\u22D4','forkv':'\u2AD9','Fouriertrf':'\u2131','fpartint':'\u2A0D','frac12':'\xBD','frac13':'\u2153','frac14':'\xBC','frac15':'\u2155','frac16':'\u2159','frac18':'\u215B','frac23':'\u2154','frac25':'\u2156','frac34':'\xBE','frac35':'\u2157','frac38':'\u215C','frac45':'\u2158','frac56':'\u215A','frac58':'\u215D','frac78':'\u215E','frasl':'\u2044','frown':'\u2322','fscr':'\uD835\uDCBB','Fscr':'\u2131','gacute':'\u01F5','gamma':'\u03B3','Gamma':'\u0393','gammad':'\u03DD','Gammad':'\u03DC','gap':'\u2A86','gbreve':'\u011F','Gbreve':'\u011E','Gcedil':'\u0122','gcirc':'\u011D','Gcirc':'\u011C','gcy':'\u0433','Gcy':'\u0413','gdot':'\u0121','Gdot':'\u0120','ge':'\u2265','gE':'\u2267','gel':'\u22DB','gEl':'\u2A8C','geq':'\u2265','geqq':'\u2267','geqslant':'\u2A7E','ges':'\u2A7E','gescc':'\u2AA9','gesdot':'\u2A80','gesdoto':'\u2A82','gesdotol':'\u2A84','gesl':'\u22DB\uFE00','gesles':'\u2A94','gfr':'\uD835\uDD24','Gfr':'\uD835\uDD0A','gg':'\u226B','Gg':'\u22D9','ggg':'\u22D9','gimel':'\u2137','gjcy':'\u0453','GJcy':'\u0403','gl':'\u2277','gla':'\u2AA5','glE':'\u2A92','glj':'\u2AA4','gnap':'\u2A8A','gnapprox':'\u2A8A','gne':'\u2A88','gnE':'\u2269','gneq':'\u2A88','gneqq':'\u2269','gnsim':'\u22E7','gopf':'\uD835\uDD58','Gopf':'\uD835\uDD3E','grave':'`','GreaterEqual':'\u2265','GreaterEqualLess':'\u22DB','GreaterFullEqual':'\u2267','GreaterGreater':'\u2AA2','GreaterLess':'\u2277','GreaterSlantEqual':'\u2A7E','GreaterTilde':'\u2273','gscr':'\u210A','Gscr':'\uD835\uDCA2','gsim':'\u2273','gsime':'\u2A8E','gsiml':'\u2A90','gt':'>','Gt':'\u226B','GT':'>','gtcc':'\u2AA7','gtcir':'\u2A7A','gtdot':'\u22D7','gtlPar':'\u2995','gtquest':'\u2A7C','gtrapprox':'\u2A86','gtrarr':'\u2978','gtrdot':'\u22D7','gtreqless':'\u22DB','gtreqqless':'\u2A8C','gtrless':'\u2277','gtrsim':'\u2273','gvertneqq':'\u2269\uFE00','gvnE':'\u2269\uFE00','Hacek':'\u02C7','hairsp':'\u200A','half':'\xBD','hamilt':'\u210B','hardcy':'\u044A','HARDcy':'\u042A','harr':'\u2194','hArr':'\u21D4','harrcir':'\u2948','harrw':'\u21AD','Hat':'^','hbar':'\u210F','hcirc':'\u0125','Hcirc':'\u0124','hearts':'\u2665','heartsuit':'\u2665','hellip':'\u2026','hercon':'\u22B9','hfr':'\uD835\uDD25','Hfr':'\u210C','HilbertSpace':'\u210B','hksearow':'\u2925','hkswarow':'\u2926','hoarr':'\u21FF','homtht':'\u223B','hookleftarrow':'\u21A9','hookrightarrow':'\u21AA','hopf':'\uD835\uDD59','Hopf':'\u210D','horbar':'\u2015','HorizontalLine':'\u2500','hscr':'\uD835\uDCBD','Hscr':'\u210B','hslash':'\u210F','hstrok':'\u0127','Hstrok':'\u0126','HumpDownHump':'\u224E','HumpEqual':'\u224F','hybull':'\u2043','hyphen':'\u2010','iacute':'\xED','Iacute':'\xCD','ic':'\u2063','icirc':'\xEE','Icirc':'\xCE','icy':'\u0438','Icy':'\u0418','Idot':'\u0130','iecy':'\u0435','IEcy':'\u0415','iexcl':'\xA1','iff':'\u21D4','ifr':'\uD835\uDD26','Ifr':'\u2111','igrave':'\xEC','Igrave':'\xCC','ii':'\u2148','iiiint':'\u2A0C','iiint':'\u222D','iinfin':'\u29DC','iiota':'\u2129','ijlig':'\u0133','IJlig':'\u0132','Im':'\u2111','imacr':'\u012B','Imacr':'\u012A','image':'\u2111','ImaginaryI':'\u2148','imagline':'\u2110','imagpart':'\u2111','imath':'\u0131','imof':'\u22B7','imped':'\u01B5','Implies':'\u21D2','in':'\u2208','incare':'\u2105','infin':'\u221E','infintie':'\u29DD','inodot':'\u0131','int':'\u222B','Int':'\u222C','intcal':'\u22BA','integers':'\u2124','Integral':'\u222B','intercal':'\u22BA','Intersection':'\u22C2','intlarhk':'\u2A17','intprod':'\u2A3C','InvisibleComma':'\u2063','InvisibleTimes':'\u2062','iocy':'\u0451','IOcy':'\u0401','iogon':'\u012F','Iogon':'\u012E','iopf':'\uD835\uDD5A','Iopf':'\uD835\uDD40','iota':'\u03B9','Iota':'\u0399','iprod':'\u2A3C','iquest':'\xBF','iscr':'\uD835\uDCBE','Iscr':'\u2110','isin':'\u2208','isindot':'\u22F5','isinE':'\u22F9','isins':'\u22F4','isinsv':'\u22F3','isinv':'\u2208','it':'\u2062','itilde':'\u0129','Itilde':'\u0128','iukcy':'\u0456','Iukcy':'\u0406','iuml':'\xEF','Iuml':'\xCF','jcirc':'\u0135','Jcirc':'\u0134','jcy':'\u0439','Jcy':'\u0419','jfr':'\uD835\uDD27','Jfr':'\uD835\uDD0D','jmath':'\u0237','jopf':'\uD835\uDD5B','Jopf':'\uD835\uDD41','jscr':'\uD835\uDCBF','Jscr':'\uD835\uDCA5','jsercy':'\u0458','Jsercy':'\u0408','jukcy':'\u0454','Jukcy':'\u0404','kappa':'\u03BA','Kappa':'\u039A','kappav':'\u03F0','kcedil':'\u0137','Kcedil':'\u0136','kcy':'\u043A','Kcy':'\u041A','kfr':'\uD835\uDD28','Kfr':'\uD835\uDD0E','kgreen':'\u0138','khcy':'\u0445','KHcy':'\u0425','kjcy':'\u045C','KJcy':'\u040C','kopf':'\uD835\uDD5C','Kopf':'\uD835\uDD42','kscr':'\uD835\uDCC0','Kscr':'\uD835\uDCA6','lAarr':'\u21DA','lacute':'\u013A','Lacute':'\u0139','laemptyv':'\u29B4','lagran':'\u2112','lambda':'\u03BB','Lambda':'\u039B','lang':'\u27E8','Lang':'\u27EA','langd':'\u2991','langle':'\u27E8','lap':'\u2A85','Laplacetrf':'\u2112','laquo':'\xAB','larr':'\u2190','lArr':'\u21D0','Larr':'\u219E','larrb':'\u21E4','larrbfs':'\u291F','larrfs':'\u291D','larrhk':'\u21A9','larrlp':'\u21AB','larrpl':'\u2939','larrsim':'\u2973','larrtl':'\u21A2','lat':'\u2AAB','latail':'\u2919','lAtail':'\u291B','late':'\u2AAD','lates':'\u2AAD\uFE00','lbarr':'\u290C','lBarr':'\u290E','lbbrk':'\u2772','lbrace':'{','lbrack':'[','lbrke':'\u298B','lbrksld':'\u298F','lbrkslu':'\u298D','lcaron':'\u013E','Lcaron':'\u013D','lcedil':'\u013C','Lcedil':'\u013B','lceil':'\u2308','lcub':'{','lcy':'\u043B','Lcy':'\u041B','ldca':'\u2936','ldquo':'\u201C','ldquor':'\u201E','ldrdhar':'\u2967','ldrushar':'\u294B','ldsh':'\u21B2','le':'\u2264','lE':'\u2266','LeftAngleBracket':'\u27E8','leftarrow':'\u2190','Leftarrow':'\u21D0','LeftArrow':'\u2190','LeftArrowBar':'\u21E4','LeftArrowRightArrow':'\u21C6','leftarrowtail':'\u21A2','LeftCeiling':'\u2308','LeftDoubleBracket':'\u27E6','LeftDownTeeVector':'\u2961','LeftDownVector':'\u21C3','LeftDownVectorBar':'\u2959','LeftFloor':'\u230A','leftharpoondown':'\u21BD','leftharpoonup':'\u21BC','leftleftarrows':'\u21C7','leftrightarrow':'\u2194','Leftrightarrow':'\u21D4','LeftRightArrow':'\u2194','leftrightarrows':'\u21C6','leftrightharpoons':'\u21CB','leftrightsquigarrow':'\u21AD','LeftRightVector':'\u294E','LeftTee':'\u22A3','LeftTeeArrow':'\u21A4','LeftTeeVector':'\u295A','leftthreetimes':'\u22CB','LeftTriangle':'\u22B2','LeftTriangleBar':'\u29CF','LeftTriangleEqual':'\u22B4','LeftUpDownVector':'\u2951','LeftUpTeeVector':'\u2960','LeftUpVector':'\u21BF','LeftUpVectorBar':'\u2958','LeftVector':'\u21BC','LeftVectorBar':'\u2952','leg':'\u22DA','lEg':'\u2A8B','leq':'\u2264','leqq':'\u2266','leqslant':'\u2A7D','les':'\u2A7D','lescc':'\u2AA8','lesdot':'\u2A7F','lesdoto':'\u2A81','lesdotor':'\u2A83','lesg':'\u22DA\uFE00','lesges':'\u2A93','lessapprox':'\u2A85','lessdot':'\u22D6','lesseqgtr':'\u22DA','lesseqqgtr':'\u2A8B','LessEqualGreater':'\u22DA','LessFullEqual':'\u2266','LessGreater':'\u2276','lessgtr':'\u2276','LessLess':'\u2AA1','lesssim':'\u2272','LessSlantEqual':'\u2A7D','LessTilde':'\u2272','lfisht':'\u297C','lfloor':'\u230A','lfr':'\uD835\uDD29','Lfr':'\uD835\uDD0F','lg':'\u2276','lgE':'\u2A91','lHar':'\u2962','lhard':'\u21BD','lharu':'\u21BC','lharul':'\u296A','lhblk':'\u2584','ljcy':'\u0459','LJcy':'\u0409','ll':'\u226A','Ll':'\u22D8','llarr':'\u21C7','llcorner':'\u231E','Lleftarrow':'\u21DA','llhard':'\u296B','lltri':'\u25FA','lmidot':'\u0140','Lmidot':'\u013F','lmoust':'\u23B0','lmoustache':'\u23B0','lnap':'\u2A89','lnapprox':'\u2A89','lne':'\u2A87','lnE':'\u2268','lneq':'\u2A87','lneqq':'\u2268','lnsim':'\u22E6','loang':'\u27EC','loarr':'\u21FD','lobrk':'\u27E6','longleftarrow':'\u27F5','Longleftarrow':'\u27F8','LongLeftArrow':'\u27F5','longleftrightarrow':'\u27F7','Longleftrightarrow':'\u27FA','LongLeftRightArrow':'\u27F7','longmapsto':'\u27FC','longrightarrow':'\u27F6','Longrightarrow':'\u27F9','LongRightArrow':'\u27F6','looparrowleft':'\u21AB','looparrowright':'\u21AC','lopar':'\u2985','lopf':'\uD835\uDD5D','Lopf':'\uD835\uDD43','loplus':'\u2A2D','lotimes':'\u2A34','lowast':'\u2217','lowbar':'_','LowerLeftArrow':'\u2199','LowerRightArrow':'\u2198','loz':'\u25CA','lozenge':'\u25CA','lozf':'\u29EB','lpar':'(','lparlt':'\u2993','lrarr':'\u21C6','lrcorner':'\u231F','lrhar':'\u21CB','lrhard':'\u296D','lrm':'\u200E','lrtri':'\u22BF','lsaquo':'\u2039','lscr':'\uD835\uDCC1','Lscr':'\u2112','lsh':'\u21B0','Lsh':'\u21B0','lsim':'\u2272','lsime':'\u2A8D','lsimg':'\u2A8F','lsqb':'[','lsquo':'\u2018','lsquor':'\u201A','lstrok':'\u0142','Lstrok':'\u0141','lt':'<','Lt':'\u226A','LT':'<','ltcc':'\u2AA6','ltcir':'\u2A79','ltdot':'\u22D6','lthree':'\u22CB','ltimes':'\u22C9','ltlarr':'\u2976','ltquest':'\u2A7B','ltri':'\u25C3','ltrie':'\u22B4','ltrif':'\u25C2','ltrPar':'\u2996','lurdshar':'\u294A','luruhar':'\u2966','lvertneqq':'\u2268\uFE00','lvnE':'\u2268\uFE00','macr':'\xAF','male':'\u2642','malt':'\u2720','maltese':'\u2720','map':'\u21A6','Map':'\u2905','mapsto':'\u21A6','mapstodown':'\u21A7','mapstoleft':'\u21A4','mapstoup':'\u21A5','marker':'\u25AE','mcomma':'\u2A29','mcy':'\u043C','Mcy':'\u041C','mdash':'\u2014','mDDot':'\u223A','measuredangle':'\u2221','MediumSpace':'\u205F','Mellintrf':'\u2133','mfr':'\uD835\uDD2A','Mfr':'\uD835\uDD10','mho':'\u2127','micro':'\xB5','mid':'\u2223','midast':'*','midcir':'\u2AF0','middot':'\xB7','minus':'\u2212','minusb':'\u229F','minusd':'\u2238','minusdu':'\u2A2A','MinusPlus':'\u2213','mlcp':'\u2ADB','mldr':'\u2026','mnplus':'\u2213','models':'\u22A7','mopf':'\uD835\uDD5E','Mopf':'\uD835\uDD44','mp':'\u2213','mscr':'\uD835\uDCC2','Mscr':'\u2133','mstpos':'\u223E','mu':'\u03BC','Mu':'\u039C','multimap':'\u22B8','mumap':'\u22B8','nabla':'\u2207','nacute':'\u0144','Nacute':'\u0143','nang':'\u2220\u20D2','nap':'\u2249','napE':'\u2A70\u0338','napid':'\u224B\u0338','napos':'\u0149','napprox':'\u2249','natur':'\u266E','natural':'\u266E','naturals':'\u2115','nbsp':'\xA0','nbump':'\u224E\u0338','nbumpe':'\u224F\u0338','ncap':'\u2A43','ncaron':'\u0148','Ncaron':'\u0147','ncedil':'\u0146','Ncedil':'\u0145','ncong':'\u2247','ncongdot':'\u2A6D\u0338','ncup':'\u2A42','ncy':'\u043D','Ncy':'\u041D','ndash':'\u2013','ne':'\u2260','nearhk':'\u2924','nearr':'\u2197','neArr':'\u21D7','nearrow':'\u2197','nedot':'\u2250\u0338','NegativeMediumSpace':'\u200B','NegativeThickSpace':'\u200B','NegativeThinSpace':'\u200B','NegativeVeryThinSpace':'\u200B','nequiv':'\u2262','nesear':'\u2928','nesim':'\u2242\u0338','NestedGreaterGreater':'\u226B','NestedLessLess':'\u226A','NewLine':'\n','nexist':'\u2204','nexists':'\u2204','nfr':'\uD835\uDD2B','Nfr':'\uD835\uDD11','nge':'\u2271','ngE':'\u2267\u0338','ngeq':'\u2271','ngeqq':'\u2267\u0338','ngeqslant':'\u2A7E\u0338','nges':'\u2A7E\u0338','nGg':'\u22D9\u0338','ngsim':'\u2275','ngt':'\u226F','nGt':'\u226B\u20D2','ngtr':'\u226F','nGtv':'\u226B\u0338','nharr':'\u21AE','nhArr':'\u21CE','nhpar':'\u2AF2','ni':'\u220B','nis':'\u22FC','nisd':'\u22FA','niv':'\u220B','njcy':'\u045A','NJcy':'\u040A','nlarr':'\u219A','nlArr':'\u21CD','nldr':'\u2025','nle':'\u2270','nlE':'\u2266\u0338','nleftarrow':'\u219A','nLeftarrow':'\u21CD','nleftrightarrow':'\u21AE','nLeftrightarrow':'\u21CE','nleq':'\u2270','nleqq':'\u2266\u0338','nleqslant':'\u2A7D\u0338','nles':'\u2A7D\u0338','nless':'\u226E','nLl':'\u22D8\u0338','nlsim':'\u2274','nlt':'\u226E','nLt':'\u226A\u20D2','nltri':'\u22EA','nltrie':'\u22EC','nLtv':'\u226A\u0338','nmid':'\u2224','NoBreak':'\u2060','NonBreakingSpace':'\xA0','nopf':'\uD835\uDD5F','Nopf':'\u2115','not':'\xAC','Not':'\u2AEC','NotCongruent':'\u2262','NotCupCap':'\u226D','NotDoubleVerticalBar':'\u2226','NotElement':'\u2209','NotEqual':'\u2260','NotEqualTilde':'\u2242\u0338','NotExists':'\u2204','NotGreater':'\u226F','NotGreaterEqual':'\u2271','NotGreaterFullEqual':'\u2267\u0338','NotGreaterGreater':'\u226B\u0338','NotGreaterLess':'\u2279','NotGreaterSlantEqual':'\u2A7E\u0338','NotGreaterTilde':'\u2275','NotHumpDownHump':'\u224E\u0338','NotHumpEqual':'\u224F\u0338','notin':'\u2209','notindot':'\u22F5\u0338','notinE':'\u22F9\u0338','notinva':'\u2209','notinvb':'\u22F7','notinvc':'\u22F6','NotLeftTriangle':'\u22EA','NotLeftTriangleBar':'\u29CF\u0338','NotLeftTriangleEqual':'\u22EC','NotLess':'\u226E','NotLessEqual':'\u2270','NotLessGreater':'\u2278','NotLessLess':'\u226A\u0338','NotLessSlantEqual':'\u2A7D\u0338','NotLessTilde':'\u2274','NotNestedGreaterGreater':'\u2AA2\u0338','NotNestedLessLess':'\u2AA1\u0338','notni':'\u220C','notniva':'\u220C','notnivb':'\u22FE','notnivc':'\u22FD','NotPrecedes':'\u2280','NotPrecedesEqual':'\u2AAF\u0338','NotPrecedesSlantEqual':'\u22E0','NotReverseElement':'\u220C','NotRightTriangle':'\u22EB','NotRightTriangleBar':'\u29D0\u0338','NotRightTriangleEqual':'\u22ED','NotSquareSubset':'\u228F\u0338','NotSquareSubsetEqual':'\u22E2','NotSquareSuperset':'\u2290\u0338','NotSquareSupersetEqual':'\u22E3','NotSubset':'\u2282\u20D2','NotSubsetEqual':'\u2288','NotSucceeds':'\u2281','NotSucceedsEqual':'\u2AB0\u0338','NotSucceedsSlantEqual':'\u22E1','NotSucceedsTilde':'\u227F\u0338','NotSuperset':'\u2283\u20D2','NotSupersetEqual':'\u2289','NotTilde':'\u2241','NotTildeEqual':'\u2244','NotTildeFullEqual':'\u2247','NotTildeTilde':'\u2249','NotVerticalBar':'\u2224','npar':'\u2226','nparallel':'\u2226','nparsl':'\u2AFD\u20E5','npart':'\u2202\u0338','npolint':'\u2A14','npr':'\u2280','nprcue':'\u22E0','npre':'\u2AAF\u0338','nprec':'\u2280','npreceq':'\u2AAF\u0338','nrarr':'\u219B','nrArr':'\u21CF','nrarrc':'\u2933\u0338','nrarrw':'\u219D\u0338','nrightarrow':'\u219B','nRightarrow':'\u21CF','nrtri':'\u22EB','nrtrie':'\u22ED','nsc':'\u2281','nsccue':'\u22E1','nsce':'\u2AB0\u0338','nscr':'\uD835\uDCC3','Nscr':'\uD835\uDCA9','nshortmid':'\u2224','nshortparallel':'\u2226','nsim':'\u2241','nsime':'\u2244','nsimeq':'\u2244','nsmid':'\u2224','nspar':'\u2226','nsqsube':'\u22E2','nsqsupe':'\u22E3','nsub':'\u2284','nsube':'\u2288','nsubE':'\u2AC5\u0338','nsubset':'\u2282\u20D2','nsubseteq':'\u2288','nsubseteqq':'\u2AC5\u0338','nsucc':'\u2281','nsucceq':'\u2AB0\u0338','nsup':'\u2285','nsupe':'\u2289','nsupE':'\u2AC6\u0338','nsupset':'\u2283\u20D2','nsupseteq':'\u2289','nsupseteqq':'\u2AC6\u0338','ntgl':'\u2279','ntilde':'\xF1','Ntilde':'\xD1','ntlg':'\u2278','ntriangleleft':'\u22EA','ntrianglelefteq':'\u22EC','ntriangleright':'\u22EB','ntrianglerighteq':'\u22ED','nu':'\u03BD','Nu':'\u039D','num':'#','numero':'\u2116','numsp':'\u2007','nvap':'\u224D\u20D2','nvdash':'\u22AC','nvDash':'\u22AD','nVdash':'\u22AE','nVDash':'\u22AF','nvge':'\u2265\u20D2','nvgt':'>\u20D2','nvHarr':'\u2904','nvinfin':'\u29DE','nvlArr':'\u2902','nvle':'\u2264\u20D2','nvlt':'<\u20D2','nvltrie':'\u22B4\u20D2','nvrArr':'\u2903','nvrtrie':'\u22B5\u20D2','nvsim':'\u223C\u20D2','nwarhk':'\u2923','nwarr':'\u2196','nwArr':'\u21D6','nwarrow':'\u2196','nwnear':'\u2927','oacute':'\xF3','Oacute':'\xD3','oast':'\u229B','ocir':'\u229A','ocirc':'\xF4','Ocirc':'\xD4','ocy':'\u043E','Ocy':'\u041E','odash':'\u229D','odblac':'\u0151','Odblac':'\u0150','odiv':'\u2A38','odot':'\u2299','odsold':'\u29BC','oelig':'\u0153','OElig':'\u0152','ofcir':'\u29BF','ofr':'\uD835\uDD2C','Ofr':'\uD835\uDD12','ogon':'\u02DB','ograve':'\xF2','Ograve':'\xD2','ogt':'\u29C1','ohbar':'\u29B5','ohm':'\u03A9','oint':'\u222E','olarr':'\u21BA','olcir':'\u29BE','olcross':'\u29BB','oline':'\u203E','olt':'\u29C0','omacr':'\u014D','Omacr':'\u014C','omega':'\u03C9','Omega':'\u03A9','omicron':'\u03BF','Omicron':'\u039F','omid':'\u29B6','ominus':'\u2296','oopf':'\uD835\uDD60','Oopf':'\uD835\uDD46','opar':'\u29B7','OpenCurlyDoubleQuote':'\u201C','OpenCurlyQuote':'\u2018','operp':'\u29B9','oplus':'\u2295','or':'\u2228','Or':'\u2A54','orarr':'\u21BB','ord':'\u2A5D','order':'\u2134','orderof':'\u2134','ordf':'\xAA','ordm':'\xBA','origof':'\u22B6','oror':'\u2A56','orslope':'\u2A57','orv':'\u2A5B','oS':'\u24C8','oscr':'\u2134','Oscr':'\uD835\uDCAA','oslash':'\xF8','Oslash':'\xD8','osol':'\u2298','otilde':'\xF5','Otilde':'\xD5','otimes':'\u2297','Otimes':'\u2A37','otimesas':'\u2A36','ouml':'\xF6','Ouml':'\xD6','ovbar':'\u233D','OverBar':'\u203E','OverBrace':'\u23DE','OverBracket':'\u23B4','OverParenthesis':'\u23DC','par':'\u2225','para':'\xB6','parallel':'\u2225','parsim':'\u2AF3','parsl':'\u2AFD','part':'\u2202','PartialD':'\u2202','pcy':'\u043F','Pcy':'\u041F','percnt':'%','period':'.','permil':'\u2030','perp':'\u22A5','pertenk':'\u2031','pfr':'\uD835\uDD2D','Pfr':'\uD835\uDD13','phi':'\u03C6','Phi':'\u03A6','phiv':'\u03D5','phmmat':'\u2133','phone':'\u260E','pi':'\u03C0','Pi':'\u03A0','pitchfork':'\u22D4','piv':'\u03D6','planck':'\u210F','planckh':'\u210E','plankv':'\u210F','plus':'+','plusacir':'\u2A23','plusb':'\u229E','pluscir':'\u2A22','plusdo':'\u2214','plusdu':'\u2A25','pluse':'\u2A72','PlusMinus':'\xB1','plusmn':'\xB1','plussim':'\u2A26','plustwo':'\u2A27','pm':'\xB1','Poincareplane':'\u210C','pointint':'\u2A15','popf':'\uD835\uDD61','Popf':'\u2119','pound':'\xA3','pr':'\u227A','Pr':'\u2ABB','prap':'\u2AB7','prcue':'\u227C','pre':'\u2AAF','prE':'\u2AB3','prec':'\u227A','precapprox':'\u2AB7','preccurlyeq':'\u227C','Precedes':'\u227A','PrecedesEqual':'\u2AAF','PrecedesSlantEqual':'\u227C','PrecedesTilde':'\u227E','preceq':'\u2AAF','precnapprox':'\u2AB9','precneqq':'\u2AB5','precnsim':'\u22E8','precsim':'\u227E','prime':'\u2032','Prime':'\u2033','primes':'\u2119','prnap':'\u2AB9','prnE':'\u2AB5','prnsim':'\u22E8','prod':'\u220F','Product':'\u220F','profalar':'\u232E','profline':'\u2312','profsurf':'\u2313','prop':'\u221D','Proportion':'\u2237','Proportional':'\u221D','propto':'\u221D','prsim':'\u227E','prurel':'\u22B0','pscr':'\uD835\uDCC5','Pscr':'\uD835\uDCAB','psi':'\u03C8','Psi':'\u03A8','puncsp':'\u2008','qfr':'\uD835\uDD2E','Qfr':'\uD835\uDD14','qint':'\u2A0C','qopf':'\uD835\uDD62','Qopf':'\u211A','qprime':'\u2057','qscr':'\uD835\uDCC6','Qscr':'\uD835\uDCAC','quaternions':'\u210D','quatint':'\u2A16','quest':'?','questeq':'\u225F','quot':'"','QUOT':'"','rAarr':'\u21DB','race':'\u223D\u0331','racute':'\u0155','Racute':'\u0154','radic':'\u221A','raemptyv':'\u29B3','rang':'\u27E9','Rang':'\u27EB','rangd':'\u2992','range':'\u29A5','rangle':'\u27E9','raquo':'\xBB','rarr':'\u2192','rArr':'\u21D2','Rarr':'\u21A0','rarrap':'\u2975','rarrb':'\u21E5','rarrbfs':'\u2920','rarrc':'\u2933','rarrfs':'\u291E','rarrhk':'\u21AA','rarrlp':'\u21AC','rarrpl':'\u2945','rarrsim':'\u2974','rarrtl':'\u21A3','Rarrtl':'\u2916','rarrw':'\u219D','ratail':'\u291A','rAtail':'\u291C','ratio':'\u2236','rationals':'\u211A','rbarr':'\u290D','rBarr':'\u290F','RBarr':'\u2910','rbbrk':'\u2773','rbrace':'}','rbrack':']','rbrke':'\u298C','rbrksld':'\u298E','rbrkslu':'\u2990','rcaron':'\u0159','Rcaron':'\u0158','rcedil':'\u0157','Rcedil':'\u0156','rceil':'\u2309','rcub':'}','rcy':'\u0440','Rcy':'\u0420','rdca':'\u2937','rdldhar':'\u2969','rdquo':'\u201D','rdquor':'\u201D','rdsh':'\u21B3','Re':'\u211C','real':'\u211C','realine':'\u211B','realpart':'\u211C','reals':'\u211D','rect':'\u25AD','reg':'\xAE','REG':'\xAE','ReverseElement':'\u220B','ReverseEquilibrium':'\u21CB','ReverseUpEquilibrium':'\u296F','rfisht':'\u297D','rfloor':'\u230B','rfr':'\uD835\uDD2F','Rfr':'\u211C','rHar':'\u2964','rhard':'\u21C1','rharu':'\u21C0','rharul':'\u296C','rho':'\u03C1','Rho':'\u03A1','rhov':'\u03F1','RightAngleBracket':'\u27E9','rightarrow':'\u2192','Rightarrow':'\u21D2','RightArrow':'\u2192','RightArrowBar':'\u21E5','RightArrowLeftArrow':'\u21C4','rightarrowtail':'\u21A3','RightCeiling':'\u2309','RightDoubleBracket':'\u27E7','RightDownTeeVector':'\u295D','RightDownVector':'\u21C2','RightDownVectorBar':'\u2955','RightFloor':'\u230B','rightharpoondown':'\u21C1','rightharpoonup':'\u21C0','rightleftarrows':'\u21C4','rightleftharpoons':'\u21CC','rightrightarrows':'\u21C9','rightsquigarrow':'\u219D','RightTee':'\u22A2','RightTeeArrow':'\u21A6','RightTeeVector':'\u295B','rightthreetimes':'\u22CC','RightTriangle':'\u22B3','RightTriangleBar':'\u29D0','RightTriangleEqual':'\u22B5','RightUpDownVector':'\u294F','RightUpTeeVector':'\u295C','RightUpVector':'\u21BE','RightUpVectorBar':'\u2954','RightVector':'\u21C0','RightVectorBar':'\u2953','ring':'\u02DA','risingdotseq':'\u2253','rlarr':'\u21C4','rlhar':'\u21CC','rlm':'\u200F','rmoust':'\u23B1','rmoustache':'\u23B1','rnmid':'\u2AEE','roang':'\u27ED','roarr':'\u21FE','robrk':'\u27E7','ropar':'\u2986','ropf':'\uD835\uDD63','Ropf':'\u211D','roplus':'\u2A2E','rotimes':'\u2A35','RoundImplies':'\u2970','rpar':')','rpargt':'\u2994','rppolint':'\u2A12','rrarr':'\u21C9','Rrightarrow':'\u21DB','rsaquo':'\u203A','rscr':'\uD835\uDCC7','Rscr':'\u211B','rsh':'\u21B1','Rsh':'\u21B1','rsqb':']','rsquo':'\u2019','rsquor':'\u2019','rthree':'\u22CC','rtimes':'\u22CA','rtri':'\u25B9','rtrie':'\u22B5','rtrif':'\u25B8','rtriltri':'\u29CE','RuleDelayed':'\u29F4','ruluhar':'\u2968','rx':'\u211E','sacute':'\u015B','Sacute':'\u015A','sbquo':'\u201A','sc':'\u227B','Sc':'\u2ABC','scap':'\u2AB8','scaron':'\u0161','Scaron':'\u0160','sccue':'\u227D','sce':'\u2AB0','scE':'\u2AB4','scedil':'\u015F','Scedil':'\u015E','scirc':'\u015D','Scirc':'\u015C','scnap':'\u2ABA','scnE':'\u2AB6','scnsim':'\u22E9','scpolint':'\u2A13','scsim':'\u227F','scy':'\u0441','Scy':'\u0421','sdot':'\u22C5','sdotb':'\u22A1','sdote':'\u2A66','searhk':'\u2925','searr':'\u2198','seArr':'\u21D8','searrow':'\u2198','sect':'\xA7','semi':';','seswar':'\u2929','setminus':'\u2216','setmn':'\u2216','sext':'\u2736','sfr':'\uD835\uDD30','Sfr':'\uD835\uDD16','sfrown':'\u2322','sharp':'\u266F','shchcy':'\u0449','SHCHcy':'\u0429','shcy':'\u0448','SHcy':'\u0428','ShortDownArrow':'\u2193','ShortLeftArrow':'\u2190','shortmid':'\u2223','shortparallel':'\u2225','ShortRightArrow':'\u2192','ShortUpArrow':'\u2191','shy':'\xAD','sigma':'\u03C3','Sigma':'\u03A3','sigmaf':'\u03C2','sigmav':'\u03C2','sim':'\u223C','simdot':'\u2A6A','sime':'\u2243','simeq':'\u2243','simg':'\u2A9E','simgE':'\u2AA0','siml':'\u2A9D','simlE':'\u2A9F','simne':'\u2246','simplus':'\u2A24','simrarr':'\u2972','slarr':'\u2190','SmallCircle':'\u2218','smallsetminus':'\u2216','smashp':'\u2A33','smeparsl':'\u29E4','smid':'\u2223','smile':'\u2323','smt':'\u2AAA','smte':'\u2AAC','smtes':'\u2AAC\uFE00','softcy':'\u044C','SOFTcy':'\u042C','sol':'/','solb':'\u29C4','solbar':'\u233F','sopf':'\uD835\uDD64','Sopf':'\uD835\uDD4A','spades':'\u2660','spadesuit':'\u2660','spar':'\u2225','sqcap':'\u2293','sqcaps':'\u2293\uFE00','sqcup':'\u2294','sqcups':'\u2294\uFE00','Sqrt':'\u221A','sqsub':'\u228F','sqsube':'\u2291','sqsubset':'\u228F','sqsubseteq':'\u2291','sqsup':'\u2290','sqsupe':'\u2292','sqsupset':'\u2290','sqsupseteq':'\u2292','squ':'\u25A1','square':'\u25A1','Square':'\u25A1','SquareIntersection':'\u2293','SquareSubset':'\u228F','SquareSubsetEqual':'\u2291','SquareSuperset':'\u2290','SquareSupersetEqual':'\u2292','SquareUnion':'\u2294','squarf':'\u25AA','squf':'\u25AA','srarr':'\u2192','sscr':'\uD835\uDCC8','Sscr':'\uD835\uDCAE','ssetmn':'\u2216','ssmile':'\u2323','sstarf':'\u22C6','star':'\u2606','Star':'\u22C6','starf':'\u2605','straightepsilon':'\u03F5','straightphi':'\u03D5','strns':'\xAF','sub':'\u2282','Sub':'\u22D0','subdot':'\u2ABD','sube':'\u2286','subE':'\u2AC5','subedot':'\u2AC3','submult':'\u2AC1','subne':'\u228A','subnE':'\u2ACB','subplus':'\u2ABF','subrarr':'\u2979','subset':'\u2282','Subset':'\u22D0','subseteq':'\u2286','subseteqq':'\u2AC5','SubsetEqual':'\u2286','subsetneq':'\u228A','subsetneqq':'\u2ACB','subsim':'\u2AC7','subsub':'\u2AD5','subsup':'\u2AD3','succ':'\u227B','succapprox':'\u2AB8','succcurlyeq':'\u227D','Succeeds':'\u227B','SucceedsEqual':'\u2AB0','SucceedsSlantEqual':'\u227D','SucceedsTilde':'\u227F','succeq':'\u2AB0','succnapprox':'\u2ABA','succneqq':'\u2AB6','succnsim':'\u22E9','succsim':'\u227F','SuchThat':'\u220B','sum':'\u2211','Sum':'\u2211','sung':'\u266A','sup':'\u2283','Sup':'\u22D1','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','supdot':'\u2ABE','supdsub':'\u2AD8','supe':'\u2287','supE':'\u2AC6','supedot':'\u2AC4','Superset':'\u2283','SupersetEqual':'\u2287','suphsol':'\u27C9','suphsub':'\u2AD7','suplarr':'\u297B','supmult':'\u2AC2','supne':'\u228B','supnE':'\u2ACC','supplus':'\u2AC0','supset':'\u2283','Supset':'\u22D1','supseteq':'\u2287','supseteqq':'\u2AC6','supsetneq':'\u228B','supsetneqq':'\u2ACC','supsim':'\u2AC8','supsub':'\u2AD4','supsup':'\u2AD6','swarhk':'\u2926','swarr':'\u2199','swArr':'\u21D9','swarrow':'\u2199','swnwar':'\u292A','szlig':'\xDF','Tab':'\t','target':'\u2316','tau':'\u03C4','Tau':'\u03A4','tbrk':'\u23B4','tcaron':'\u0165','Tcaron':'\u0164','tcedil':'\u0163','Tcedil':'\u0162','tcy':'\u0442','Tcy':'\u0422','tdot':'\u20DB','telrec':'\u2315','tfr':'\uD835\uDD31','Tfr':'\uD835\uDD17','there4':'\u2234','therefore':'\u2234','Therefore':'\u2234','theta':'\u03B8','Theta':'\u0398','thetasym':'\u03D1','thetav':'\u03D1','thickapprox':'\u2248','thicksim':'\u223C','ThickSpace':'\u205F\u200A','thinsp':'\u2009','ThinSpace':'\u2009','thkap':'\u2248','thksim':'\u223C','thorn':'\xFE','THORN':'\xDE','tilde':'\u02DC','Tilde':'\u223C','TildeEqual':'\u2243','TildeFullEqual':'\u2245','TildeTilde':'\u2248','times':'\xD7','timesb':'\u22A0','timesbar':'\u2A31','timesd':'\u2A30','tint':'\u222D','toea':'\u2928','top':'\u22A4','topbot':'\u2336','topcir':'\u2AF1','topf':'\uD835\uDD65','Topf':'\uD835\uDD4B','topfork':'\u2ADA','tosa':'\u2929','tprime':'\u2034','trade':'\u2122','TRADE':'\u2122','triangle':'\u25B5','triangledown':'\u25BF','triangleleft':'\u25C3','trianglelefteq':'\u22B4','triangleq':'\u225C','triangleright':'\u25B9','trianglerighteq':'\u22B5','tridot':'\u25EC','trie':'\u225C','triminus':'\u2A3A','TripleDot':'\u20DB','triplus':'\u2A39','trisb':'\u29CD','tritime':'\u2A3B','trpezium':'\u23E2','tscr':'\uD835\uDCC9','Tscr':'\uD835\uDCAF','tscy':'\u0446','TScy':'\u0426','tshcy':'\u045B','TSHcy':'\u040B','tstrok':'\u0167','Tstrok':'\u0166','twixt':'\u226C','twoheadleftarrow':'\u219E','twoheadrightarrow':'\u21A0','uacute':'\xFA','Uacute':'\xDA','uarr':'\u2191','uArr':'\u21D1','Uarr':'\u219F','Uarrocir':'\u2949','ubrcy':'\u045E','Ubrcy':'\u040E','ubreve':'\u016D','Ubreve':'\u016C','ucirc':'\xFB','Ucirc':'\xDB','ucy':'\u0443','Ucy':'\u0423','udarr':'\u21C5','udblac':'\u0171','Udblac':'\u0170','udhar':'\u296E','ufisht':'\u297E','ufr':'\uD835\uDD32','Ufr':'\uD835\uDD18','ugrave':'\xF9','Ugrave':'\xD9','uHar':'\u2963','uharl':'\u21BF','uharr':'\u21BE','uhblk':'\u2580','ulcorn':'\u231C','ulcorner':'\u231C','ulcrop':'\u230F','ultri':'\u25F8','umacr':'\u016B','Umacr':'\u016A','uml':'\xA8','UnderBar':'_','UnderBrace':'\u23DF','UnderBracket':'\u23B5','UnderParenthesis':'\u23DD','Union':'\u22C3','UnionPlus':'\u228E','uogon':'\u0173','Uogon':'\u0172','uopf':'\uD835\uDD66','Uopf':'\uD835\uDD4C','uparrow':'\u2191','Uparrow':'\u21D1','UpArrow':'\u2191','UpArrowBar':'\u2912','UpArrowDownArrow':'\u21C5','updownarrow':'\u2195','Updownarrow':'\u21D5','UpDownArrow':'\u2195','UpEquilibrium':'\u296E','upharpoonleft':'\u21BF','upharpoonright':'\u21BE','uplus':'\u228E','UpperLeftArrow':'\u2196','UpperRightArrow':'\u2197','upsi':'\u03C5','Upsi':'\u03D2','upsih':'\u03D2','upsilon':'\u03C5','Upsilon':'\u03A5','UpTee':'\u22A5','UpTeeArrow':'\u21A5','upuparrows':'\u21C8','urcorn':'\u231D','urcorner':'\u231D','urcrop':'\u230E','uring':'\u016F','Uring':'\u016E','urtri':'\u25F9','uscr':'\uD835\uDCCA','Uscr':'\uD835\uDCB0','utdot':'\u22F0','utilde':'\u0169','Utilde':'\u0168','utri':'\u25B5','utrif':'\u25B4','uuarr':'\u21C8','uuml':'\xFC','Uuml':'\xDC','uwangle':'\u29A7','vangrt':'\u299C','varepsilon':'\u03F5','varkappa':'\u03F0','varnothing':'\u2205','varphi':'\u03D5','varpi':'\u03D6','varpropto':'\u221D','varr':'\u2195','vArr':'\u21D5','varrho':'\u03F1','varsigma':'\u03C2','varsubsetneq':'\u228A\uFE00','varsubsetneqq':'\u2ACB\uFE00','varsupsetneq':'\u228B\uFE00','varsupsetneqq':'\u2ACC\uFE00','vartheta':'\u03D1','vartriangleleft':'\u22B2','vartriangleright':'\u22B3','vBar':'\u2AE8','Vbar':'\u2AEB','vBarv':'\u2AE9','vcy':'\u0432','Vcy':'\u0412','vdash':'\u22A2','vDash':'\u22A8','Vdash':'\u22A9','VDash':'\u22AB','Vdashl':'\u2AE6','vee':'\u2228','Vee':'\u22C1','veebar':'\u22BB','veeeq':'\u225A','vellip':'\u22EE','verbar':'|','Verbar':'\u2016','vert':'|','Vert':'\u2016','VerticalBar':'\u2223','VerticalLine':'|','VerticalSeparator':'\u2758','VerticalTilde':'\u2240','VeryThinSpace':'\u200A','vfr':'\uD835\uDD33','Vfr':'\uD835\uDD19','vltri':'\u22B2','vnsub':'\u2282\u20D2','vnsup':'\u2283\u20D2','vopf':'\uD835\uDD67','Vopf':'\uD835\uDD4D','vprop':'\u221D','vrtri':'\u22B3','vscr':'\uD835\uDCCB','Vscr':'\uD835\uDCB1','vsubne':'\u228A\uFE00','vsubnE':'\u2ACB\uFE00','vsupne':'\u228B\uFE00','vsupnE':'\u2ACC\uFE00','Vvdash':'\u22AA','vzigzag':'\u299A','wcirc':'\u0175','Wcirc':'\u0174','wedbar':'\u2A5F','wedge':'\u2227','Wedge':'\u22C0','wedgeq':'\u2259','weierp':'\u2118','wfr':'\uD835\uDD34','Wfr':'\uD835\uDD1A','wopf':'\uD835\uDD68','Wopf':'\uD835\uDD4E','wp':'\u2118','wr':'\u2240','wreath':'\u2240','wscr':'\uD835\uDCCC','Wscr':'\uD835\uDCB2','xcap':'\u22C2','xcirc':'\u25EF','xcup':'\u22C3','xdtri':'\u25BD','xfr':'\uD835\uDD35','Xfr':'\uD835\uDD1B','xharr':'\u27F7','xhArr':'\u27FA','xi':'\u03BE','Xi':'\u039E','xlarr':'\u27F5','xlArr':'\u27F8','xmap':'\u27FC','xnis':'\u22FB','xodot':'\u2A00','xopf':'\uD835\uDD69','Xopf':'\uD835\uDD4F','xoplus':'\u2A01','xotime':'\u2A02','xrarr':'\u27F6','xrArr':'\u27F9','xscr':'\uD835\uDCCD','Xscr':'\uD835\uDCB3','xsqcup':'\u2A06','xuplus':'\u2A04','xutri':'\u25B3','xvee':'\u22C1','xwedge':'\u22C0','yacute':'\xFD','Yacute':'\xDD','yacy':'\u044F','YAcy':'\u042F','ycirc':'\u0177','Ycirc':'\u0176','ycy':'\u044B','Ycy':'\u042B','yen':'\xA5','yfr':'\uD835\uDD36','Yfr':'\uD835\uDD1C','yicy':'\u0457','YIcy':'\u0407','yopf':'\uD835\uDD6A','Yopf':'\uD835\uDD50','yscr':'\uD835\uDCCE','Yscr':'\uD835\uDCB4','yucy':'\u044E','YUcy':'\u042E','yuml':'\xFF','Yuml':'\u0178','zacute':'\u017A','Zacute':'\u0179','zcaron':'\u017E','Zcaron':'\u017D','zcy':'\u0437','Zcy':'\u0417','zdot':'\u017C','Zdot':'\u017B','zeetrf':'\u2128','ZeroWidthSpace':'\u200B','zeta':'\u03B6','Zeta':'\u0396','zfr':'\uD835\uDD37','Zfr':'\u2128','zhcy':'\u0436','ZHcy':'\u0416','zigrarr':'\u21DD','zopf':'\uD835\uDD6B','Zopf':'\u2124','zscr':'\uD835\uDCCF','Zscr':'\uD835\uDCB5','zwj':'\u200D','zwnj':'\u200C'};
+	var decodeMapLegacy = {'aacute':'\xE1','Aacute':'\xC1','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','aelig':'\xE6','AElig':'\xC6','agrave':'\xE0','Agrave':'\xC0','amp':'&','AMP':'&','aring':'\xE5','Aring':'\xC5','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','brvbar':'\xA6','ccedil':'\xE7','Ccedil':'\xC7','cedil':'\xB8','cent':'\xA2','copy':'\xA9','COPY':'\xA9','curren':'\xA4','deg':'\xB0','divide':'\xF7','eacute':'\xE9','Eacute':'\xC9','ecirc':'\xEA','Ecirc':'\xCA','egrave':'\xE8','Egrave':'\xC8','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','frac12':'\xBD','frac14':'\xBC','frac34':'\xBE','gt':'>','GT':'>','iacute':'\xED','Iacute':'\xCD','icirc':'\xEE','Icirc':'\xCE','iexcl':'\xA1','igrave':'\xEC','Igrave':'\xCC','iquest':'\xBF','iuml':'\xEF','Iuml':'\xCF','laquo':'\xAB','lt':'<','LT':'<','macr':'\xAF','micro':'\xB5','middot':'\xB7','nbsp':'\xA0','not':'\xAC','ntilde':'\xF1','Ntilde':'\xD1','oacute':'\xF3','Oacute':'\xD3','ocirc':'\xF4','Ocirc':'\xD4','ograve':'\xF2','Ograve':'\xD2','ordf':'\xAA','ordm':'\xBA','oslash':'\xF8','Oslash':'\xD8','otilde':'\xF5','Otilde':'\xD5','ouml':'\xF6','Ouml':'\xD6','para':'\xB6','plusmn':'\xB1','pound':'\xA3','quot':'"','QUOT':'"','raquo':'\xBB','reg':'\xAE','REG':'\xAE','sect':'\xA7','shy':'\xAD','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','szlig':'\xDF','thorn':'\xFE','THORN':'\xDE','times':'\xD7','uacute':'\xFA','Uacute':'\xDA','ucirc':'\xFB','Ucirc':'\xDB','ugrave':'\xF9','Ugrave':'\xD9','uml':'\xA8','uuml':'\xFC','Uuml':'\xDC','yacute':'\xFD','Yacute':'\xDD','yen':'\xA5','yuml':'\xFF'};
+	var decodeMapNumeric = {'0':'\uFFFD','128':'\u20AC','130':'\u201A','131':'\u0192','132':'\u201E','133':'\u2026','134':'\u2020','135':'\u2021','136':'\u02C6','137':'\u2030','138':'\u0160','139':'\u2039','140':'\u0152','142':'\u017D','145':'\u2018','146':'\u2019','147':'\u201C','148':'\u201D','149':'\u2022','150':'\u2013','151':'\u2014','152':'\u02DC','153':'\u2122','154':'\u0161','155':'\u203A','156':'\u0153','158':'\u017E','159':'\u0178'};
+	var invalidReferenceCodePoints = [1,2,3,4,5,6,7,8,11,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,64976,64977,64978,64979,64980,64981,64982,64983,64984,64985,64986,64987,64988,64989,64990,64991,64992,64993,64994,64995,64996,64997,64998,64999,65000,65001,65002,65003,65004,65005,65006,65007,65534,65535,131070,131071,196606,196607,262142,262143,327678,327679,393214,393215,458750,458751,524286,524287,589822,589823,655358,655359,720894,720895,786430,786431,851966,851967,917502,917503,983038,983039,1048574,1048575,1114110,1114111];
+
+	/*--------------------------------------------------------------------------*/
+
+	var stringFromCharCode = String.fromCharCode;
+
+	var object = {};
+	var hasOwnProperty = object.hasOwnProperty;
+	var has = function(object, propertyName) {
+		return hasOwnProperty.call(object, propertyName);
+	};
+
+	var contains = function(array, value) {
+		var index = -1;
+		var length = array.length;
+		while (++index < length) {
+			if (array[index] == value) {
+				return true;
+			}
+		}
+		return false;
+	};
+
+	var merge = function(options, defaults) {
+		if (!options) {
+			return defaults;
+		}
+		var result = {};
+		var key;
+		for (key in defaults) {
+			// A `hasOwnProperty` check is not needed here, since only recognized
+			// option names are used anyway. Any others are ignored.
+			result[key] = has(options, key) ? options[key] : defaults[key];
+		}
+		return result;
+	};
+
+	// Modified version of `ucs2encode`; see https://mths.be/punycode.
+	var codePointToSymbol = function(codePoint, strict) {
+		var output = '';
+		if ((codePoint >= 0xD800 && codePoint <= 0xDFFF) || codePoint > 0x10FFFF) {
+			// See issue #4:
+			// “Otherwise, if the number is in the range 0xD800 to 0xDFFF or is
+			// greater than 0x10FFFF, then this is a parse error. Return a U+FFFD
+			// REPLACEMENT CHARACTER.”
+			if (strict) {
+				parseError('character reference outside the permissible Unicode range');
+			}
+			return '\uFFFD';
+		}
+		if (has(decodeMapNumeric, codePoint)) {
+			if (strict) {
+				parseError('disallowed character reference');
+			}
+			return decodeMapNumeric[codePoint];
+		}
+		if (strict && contains(invalidReferenceCodePoints, codePoint)) {
+			parseError('disallowed character reference');
+		}
+		if (codePoint > 0xFFFF) {
+			codePoint -= 0x10000;
+			output += stringFromCharCode(codePoint >>> 10 & 0x3FF | 0xD800);
+			codePoint = 0xDC00 | codePoint & 0x3FF;
+		}
+		output += stringFromCharCode(codePoint);
+		return output;
+	};
+
+	var hexEscape = function(codePoint) {
+		return '&#x' + codePoint.toString(16).toUpperCase() + ';';
+	};
+
+	var decEscape = function(codePoint) {
+		return '&#' + codePoint + ';';
+	};
+
+	var parseError = function(message) {
+		throw Error('Parse error: ' + message);
+	};
+
+	/*--------------------------------------------------------------------------*/
+
+	var encode = function(string, options) {
+		options = merge(options, encode.options);
+		var strict = options.strict;
+		if (strict && regexInvalidRawCodePoint.test(string)) {
+			parseError('forbidden code point');
+		}
+		var encodeEverything = options.encodeEverything;
+		var useNamedReferences = options.useNamedReferences;
+		var allowUnsafeSymbols = options.allowUnsafeSymbols;
+		var escapeCodePoint = options.decimal ? decEscape : hexEscape;
+
+		var escapeBmpSymbol = function(symbol) {
+			return escapeCodePoint(symbol.charCodeAt(0));
+		};
+
+		if (encodeEverything) {
+			// Encode ASCII symbols.
+			string = string.replace(regexAsciiWhitelist, function(symbol) {
+				// Use named references if requested & possible.
+				if (useNamedReferences && has(encodeMap, symbol)) {
+					return '&' + encodeMap[symbol] + ';';
+				}
+				return escapeBmpSymbol(symbol);
+			});
+			// Shorten a few escapes that represent two symbols, of which at least one
+			// is within the ASCII range.
+			if (useNamedReferences) {
+				string = string
+					.replace(/&gt;\u20D2/g, '&nvgt;')
+					.replace(/&lt;\u20D2/g, '&nvlt;')
+					.replace(/&#x66;&#x6A;/g, '&fjlig;');
+			}
+			// Encode non-ASCII symbols.
+			if (useNamedReferences) {
+				// Encode non-ASCII symbols that can be replaced with a named reference.
+				string = string.replace(regexEncodeNonAscii, function(string) {
+					// Note: there is no need to check `has(encodeMap, string)` here.
+					return '&' + encodeMap[string] + ';';
+				});
+			}
+			// Note: any remaining non-ASCII symbols are handled outside of the `if`.
+		} else if (useNamedReferences) {
+			// Apply named character references.
+			// Encode `<>"'&` using named character references.
+			if (!allowUnsafeSymbols) {
+				string = string.replace(regexEscape, function(string) {
+					return '&' + encodeMap[string] + ';'; // no need to check `has()` here
+				});
+			}
+			// Shorten escapes that represent two symbols, of which at least one is
+			// `<>"'&`.
+			string = string
+				.replace(/&gt;\u20D2/g, '&nvgt;')
+				.replace(/&lt;\u20D2/g, '&nvlt;');
+			// Encode non-ASCII symbols that can be replaced with a named reference.
+			string = string.replace(regexEncodeNonAscii, function(string) {
+				// Note: there is no need to check `has(encodeMap, string)` here.
+				return '&' + encodeMap[string] + ';';
+			});
+		} else if (!allowUnsafeSymbols) {
+			// Encode `<>"'&` using hexadecimal escapes, now that they’re not handled
+			// using named character references.
+			string = string.replace(regexEscape, escapeBmpSymbol);
+		}
+		return string
+			// Encode astral symbols.
+			.replace(regexAstralSymbols, function($0) {
+				// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
+				var high = $0.charCodeAt(0);
+				var low = $0.charCodeAt(1);
+				var codePoint = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;
+				return escapeCodePoint(codePoint);
+			})
+			// Encode any remaining BMP symbols that are not printable ASCII symbols
+			// using a hexadecimal escape.
+			.replace(regexBmpWhitelist, escapeBmpSymbol);
+	};
+	// Expose default options (so they can be overridden globally).
+	encode.options = {
+		'allowUnsafeSymbols': false,
+		'encodeEverything': false,
+		'strict': false,
+		'useNamedReferences': false,
+		'decimal' : false
+	};
+
+	var decode = function(html, options) {
+		options = merge(options, decode.options);
+		var strict = options.strict;
+		if (strict && regexInvalidEntity.test(html)) {
+			parseError('malformed character reference');
+		}
+		return html.replace(regexDecode, function($0, $1, $2, $3, $4, $5, $6, $7, $8) {
+			var codePoint;
+			var semicolon;
+			var decDigits;
+			var hexDigits;
+			var reference;
+			var next;
+
+			if ($1) {
+				reference = $1;
+				// Note: there is no need to check `has(decodeMap, reference)`.
+				return decodeMap[reference];
+			}
+
+			if ($2) {
+				// Decode named character references without trailing `;`, e.g. `&amp`.
+				// This is only a parse error if it gets converted to `&`, or if it is
+				// followed by `=` in an attribute context.
+				reference = $2;
+				next = $3;
+				if (next && options.isAttributeValue) {
+					if (strict && next == '=') {
+						parseError('`&` did not start a character reference');
+					}
+					return $0;
+				} else {
+					if (strict) {
+						parseError(
+							'named character reference was not terminated by a semicolon'
+						);
+					}
+					// Note: there is no need to check `has(decodeMapLegacy, reference)`.
+					return decodeMapLegacy[reference] + (next || '');
+				}
+			}
+
+			if ($4) {
+				// Decode decimal escapes, e.g. `&#119558;`.
+				decDigits = $4;
+				semicolon = $5;
+				if (strict && !semicolon) {
+					parseError('character reference was not terminated by a semicolon');
+				}
+				codePoint = parseInt(decDigits, 10);
+				return codePointToSymbol(codePoint, strict);
+			}
+
+			if ($6) {
+				// Decode hexadecimal escapes, e.g. `&#x1D306;`.
+				hexDigits = $6;
+				semicolon = $7;
+				if (strict && !semicolon) {
+					parseError('character reference was not terminated by a semicolon');
+				}
+				codePoint = parseInt(hexDigits, 16);
+				return codePointToSymbol(codePoint, strict);
+			}
+
+			// If we’re still here, `if ($7)` is implied; it’s an ambiguous
+			// ampersand for sure. https://mths.be/notes/ambiguous-ampersands
+			if (strict) {
+				parseError(
+					'named character reference was not terminated by a semicolon'
+				);
+			}
+			return $0;
+		});
+	};
+	// Expose default options (so they can be overridden globally).
+	decode.options = {
+		'isAttributeValue': false,
+		'strict': false
+	};
+
+	var escape = function(string) {
+		return string.replace(regexEscape, function($0) {
+			// Note: there is no need to check `has(escapeMap, $0)` here.
+			return escapeMap[$0];
+		});
+	};
+
+	/*--------------------------------------------------------------------------*/
+
+	var he = {
+		'version': '1.2.0',
+		'encode': encode,
+		'decode': decode,
+		'escape': escape,
+		'unescape': decode
+	};
+
+	// Some AMD build optimizers, like r.js, check for specific condition patterns
+	// like the following:
+	if (
+		false
+	) {
+		define(function() {
+			return he;
+		});
+	}	else if (freeExports && !freeExports.nodeType) {
+		if (freeModule) { // in Node.js, io.js, or RingoJS v0.8.0+
+			freeModule.exports = he;
+		} else { // in Narwhal or RingoJS v0.7.0-
+			for (var key in he) {
+				has(he, key) && (freeExports[key] = he[key]);
+			}
+		}
+	} else { // in Rhino or a web browser
+		root.he = he;
+	}
+
+}(this));
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{}],55:[function(require,module,exports){
+exports.read = function (buffer, offset, isLE, mLen, nBytes) {
+  var e, m
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var nBits = -7
+  var i = isLE ? (nBytes - 1) : 0
+  var d = isLE ? -1 : 1
+  var s = buffer[offset + i]
+
+  i += d
+
+  e = s & ((1 << (-nBits)) - 1)
+  s >>= (-nBits)
+  nBits += eLen
+  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+
+  m = e & ((1 << (-nBits)) - 1)
+  e >>= (-nBits)
+  nBits += mLen
+  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+
+  if (e === 0) {
+    e = 1 - eBias
+  } else if (e === eMax) {
+    return m ? NaN : ((s ? -1 : 1) * Infinity)
+  } else {
+    m = m + Math.pow(2, mLen)
+    e = e - eBias
+  }
+  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
+}
+
+exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+  var e, m, c
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
+  var i = isLE ? 0 : (nBytes - 1)
+  var d = isLE ? 1 : -1
+  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
+
+  value = Math.abs(value)
+
+  if (isNaN(value) || value === Infinity) {
+    m = isNaN(value) ? 1 : 0
+    e = eMax
+  } else {
+    e = Math.floor(Math.log(value) / Math.LN2)
+    if (value * (c = Math.pow(2, -e)) < 1) {
+      e--
+      c *= 2
+    }
+    if (e + eBias >= 1) {
+      value += rt / c
+    } else {
+      value += rt * Math.pow(2, 1 - eBias)
+    }
+    if (value * c >= 2) {
+      e++
+      c /= 2
+    }
+
+    if (e + eBias >= eMax) {
+      m = 0
+      e = eMax
+    } else if (e + eBias >= 1) {
+      m = ((value * c) - 1) * Math.pow(2, mLen)
+      e = e + eBias
+    } else {
+      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
+      e = 0
+    }
+  }
+
+  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+
+  e = (e << mLen) | m
+  eLen += mLen
+  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+
+  buffer[offset + i - d] |= s * 128
+}
+
+},{}],56:[function(require,module,exports){
+if (typeof Object.create === 'function') {
+  // implementation from standard node.js 'util' module
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor
+    ctor.prototype = Object.create(superCtor.prototype, {
+      constructor: {
+        value: ctor,
+        enumerable: false,
+        writable: true,
+        configurable: true
+      }
+    });
+  };
+} else {
+  // old school shim for old browsers
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor
+    var TempCtor = function () {}
+    TempCtor.prototype = superCtor.prototype
+    ctor.prototype = new TempCtor()
+    ctor.prototype.constructor = ctor
+  }
+}
+
+},{}],57:[function(require,module,exports){
+/*!
+ * Determine if an object is a Buffer
+ *
+ * @author   Feross Aboukhadijeh <https://feross.org>
+ * @license  MIT
+ */
+
+// The _isBuffer check is for Safari 5-7 support, because it's missing
+// Object.prototype.constructor. Remove this eventually
+module.exports = function (obj) {
+  return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
+}
+
+function isBuffer (obj) {
+  return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
+}
+
+// For Node v0.10 support. Remove this eventually.
+function isSlowBuffer (obj) {
+  return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
+}
+
+},{}],58:[function(require,module,exports){
+var toString = {}.toString;
+
+module.exports = Array.isArray || function (arr) {
+  return toString.call(arr) == '[object Array]';
+};
+
+},{}],59:[function(require,module,exports){
+(function (process){
+var path = require('path');
+var fs = require('fs');
+var _0777 = parseInt('0777', 8);
+
+module.exports = mkdirP.mkdirp = mkdirP.mkdirP = mkdirP;
+
+function mkdirP (p, opts, f, made) {
+    if (typeof opts === 'function') {
+        f = opts;
+        opts = {};
+    }
+    else if (!opts || typeof opts !== 'object') {
+        opts = { mode: opts };
+    }
+    
+    var mode = opts.mode;
+    var xfs = opts.fs || fs;
+    
+    if (mode === undefined) {
+        mode = _0777 & (~process.umask());
+    }
+    if (!made) made = null;
+    
+    var cb = f || function () {};
+    p = path.resolve(p);
+    
+    xfs.mkdir(p, mode, function (er) {
+        if (!er) {
+            made = made || p;
+            return cb(null, made);
+        }
+        switch (er.code) {
+            case 'ENOENT':
+                mkdirP(path.dirname(p), opts, function (er, made) {
+                    if (er) cb(er, made);
+                    else mkdirP(p, opts, cb, made);
+                });
+                break;
+
+            // In the case of any other error, just see if there's a dir
+            // there already.  If so, then hooray!  If not, then something
+            // is borked.
+            default:
+                xfs.stat(p, function (er2, stat) {
+                    // if the stat fails, then that's super weird.
+                    // let the original error be the failure reason.
+                    if (er2 || !stat.isDirectory()) cb(er, made)
+                    else cb(null, made);
+                });
+                break;
+        }
+    });
+}
+
+mkdirP.sync = function sync (p, opts, made) {
+    if (!opts || typeof opts !== 'object') {
+        opts = { mode: opts };
+    }
+    
+    var mode = opts.mode;
+    var xfs = opts.fs || fs;
+    
+    if (mode === undefined) {
+        mode = _0777 & (~process.umask());
+    }
+    if (!made) made = null;
+
+    p = path.resolve(p);
+
+    try {
+        xfs.mkdirSync(p, mode);
+        made = made || p;
+    }
+    catch (err0) {
+        switch (err0.code) {
+            case 'ENOENT' :
+                made = sync(path.dirname(p), opts, made);
+                sync(p, opts, made);
+                break;
+
+            // In the case of any other error, just see if there's a dir
+            // there already.  If so, then hooray!  If not, then something
+            // is borked.
+            default:
+                var stat;
+                try {
+                    stat = xfs.statSync(p);
+                }
+                catch (err1) {
+                    throw err0;
+                }
+                if (!stat.isDirectory()) throw err0;
+                break;
+        }
+    }
+
+    return made;
+};
+
+}).call(this,require('_process'))
+},{"_process":68,"fs":42,"path":42}],60:[function(require,module,exports){
+/**
+ * Helpers.
+ */
+
+var s = 1000;
+var m = s * 60;
+var h = m * 60;
+var d = h * 24;
+var w = d * 7;
+var y = d * 365.25;
+
+/**
+ * Parse or format the given `val`.
+ *
+ * Options:
+ *
+ *  - `long` verbose formatting [false]
+ *
+ * @param {String|Number} val
+ * @param {Object} [options]
+ * @throws {Error} throw an error if val is not a non-empty string or a number
+ * @return {String|Number}
+ * @api public
+ */
+
+module.exports = function(val, options) {
+  options = options || {};
+  var type = typeof val;
+  if (type === 'string' && val.length > 0) {
+    return parse(val);
+  } else if (type === 'number' && isNaN(val) === false) {
+    return options.long ? fmtLong(val) : fmtShort(val);
+  }
+  throw new Error(
+    'val is not a non-empty string or a valid number. val=' +
+      JSON.stringify(val)
+  );
+};
+
+/**
+ * Parse the given `str` and return milliseconds.
+ *
+ * @param {String} str
+ * @return {Number}
+ * @api private
+ */
+
+function parse(str) {
+  str = String(str);
+  if (str.length > 100) {
+    return;
+  }
+  var match = /^((?:\d+)?\-?\d?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(
+    str
+  );
+  if (!match) {
+    return;
+  }
+  var n = parseFloat(match[1]);
+  var type = (match[2] || 'ms').toLowerCase();
+  switch (type) {
+    case 'years':
+    case 'year':
+    case 'yrs':
+    case 'yr':
+    case 'y':
+      return n * y;
+    case 'weeks':
+    case 'week':
+    case 'w':
+      return n * w;
+    case 'days':
+    case 'day':
+    case 'd':
+      return n * d;
+    case 'hours':
+    case 'hour':
+    case 'hrs':
+    case 'hr':
+    case 'h':
+      return n * h;
+    case 'minutes':
+    case 'minute':
+    case 'mins':
+    case 'min':
+    case 'm':
+      return n * m;
+    case 'seconds':
+    case 'second':
+    case 'secs':
+    case 'sec':
+    case 's':
+      return n * s;
+    case 'milliseconds':
+    case 'millisecond':
+    case 'msecs':
+    case 'msec':
+    case 'ms':
+      return n;
+    default:
+      return undefined;
+  }
+}
+
+/**
+ * Short format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function fmtShort(ms) {
+  var msAbs = Math.abs(ms);
+  if (msAbs >= d) {
+    return Math.round(ms / d) + 'd';
+  }
+  if (msAbs >= h) {
+    return Math.round(ms / h) + 'h';
+  }
+  if (msAbs >= m) {
+    return Math.round(ms / m) + 'm';
+  }
+  if (msAbs >= s) {
+    return Math.round(ms / s) + 's';
+  }
+  return ms + 'ms';
+}
+
+/**
+ * Long format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function fmtLong(ms) {
+  var msAbs = Math.abs(ms);
+  if (msAbs >= d) {
+    return plural(ms, msAbs, d, 'day');
+  }
+  if (msAbs >= h) {
+    return plural(ms, msAbs, h, 'hour');
+  }
+  if (msAbs >= m) {
+    return plural(ms, msAbs, m, 'minute');
+  }
+  if (msAbs >= s) {
+    return plural(ms, msAbs, s, 'second');
+  }
+  return ms + ' ms';
+}
+
+/**
+ * Pluralization helper.
+ */
+
+function plural(ms, msAbs, n, name) {
+  var isPlural = msAbs >= n * 1.5;
+  return Math.round(ms / n) + ' ' + name + (isPlural ? 's' : '');
+}
+
+},{}],61:[function(require,module,exports){
+'use strict';
+
+// modified from https://github.com/es-shims/es5-shim
+var has = Object.prototype.hasOwnProperty;
+var toStr = Object.prototype.toString;
+var slice = Array.prototype.slice;
+var isArgs = require('./isArguments');
+var isEnumerable = Object.prototype.propertyIsEnumerable;
+var hasDontEnumBug = !isEnumerable.call({ toString: null }, 'toString');
+var hasProtoEnumBug = isEnumerable.call(function () {}, 'prototype');
+var dontEnums = [
+	'toString',
+	'toLocaleString',
+	'valueOf',
+	'hasOwnProperty',
+	'isPrototypeOf',
+	'propertyIsEnumerable',
+	'constructor'
+];
+var equalsConstructorPrototype = function (o) {
+	var ctor = o.constructor;
+	return ctor && ctor.prototype === o;
+};
+var excludedKeys = {
+	$applicationCache: true,
+	$console: true,
+	$external: true,
+	$frame: true,
+	$frameElement: true,
+	$frames: true,
+	$innerHeight: true,
+	$innerWidth: true,
+	$outerHeight: true,
+	$outerWidth: true,
+	$pageXOffset: true,
+	$pageYOffset: true,
+	$parent: true,
+	$scrollLeft: true,
+	$scrollTop: true,
+	$scrollX: true,
+	$scrollY: true,
+	$self: true,
+	$webkitIndexedDB: true,
+	$webkitStorageInfo: true,
+	$window: true
+};
+var hasAutomationEqualityBug = (function () {
+	/* global window */
+	if (typeof window === 'undefined') { return false; }
+	for (var k in window) {
+		try {
+			if (!excludedKeys['$' + k] && has.call(window, k) && window[k] !== null && typeof window[k] === 'object') {
+				try {
+					equalsConstructorPrototype(window[k]);
+				} catch (e) {
+					return true;
+				}
+			}
+		} catch (e) {
+			return true;
+		}
+	}
+	return false;
+}());
+var equalsConstructorPrototypeIfNotBuggy = function (o) {
+	/* global window */
+	if (typeof window === 'undefined' || !hasAutomationEqualityBug) {
+		return equalsConstructorPrototype(o);
+	}
+	try {
+		return equalsConstructorPrototype(o);
+	} catch (e) {
+		return false;
+	}
+};
+
+var keysShim = function keys(object) {
+	var isObject = object !== null && typeof object === 'object';
+	var isFunction = toStr.call(object) === '[object Function]';
+	var isArguments = isArgs(object);
+	var isString = isObject && toStr.call(object) === '[object String]';
+	var theKeys = [];
+
+	if (!isObject && !isFunction && !isArguments) {
+		throw new TypeError('Object.keys called on a non-object');
+	}
+
+	var skipProto = hasProtoEnumBug && isFunction;
+	if (isString && object.length > 0 && !has.call(object, 0)) {
+		for (var i = 0; i < object.length; ++i) {
+			theKeys.push(String(i));
+		}
+	}
+
+	if (isArguments && object.length > 0) {
+		for (var j = 0; j < object.length; ++j) {
+			theKeys.push(String(j));
+		}
+	} else {
+		for (var name in object) {
+			if (!(skipProto && name === 'prototype') && has.call(object, name)) {
+				theKeys.push(String(name));
+			}
+		}
+	}
+
+	if (hasDontEnumBug) {
+		var skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);
+
+		for (var k = 0; k < dontEnums.length; ++k) {
+			if (!(skipConstructor && dontEnums[k] === 'constructor') && has.call(object, dontEnums[k])) {
+				theKeys.push(dontEnums[k]);
+			}
+		}
+	}
+	return theKeys;
+};
+
+keysShim.shim = function shimObjectKeys() {
+	if (Object.keys) {
+		var keysWorksWithArguments = (function () {
+			// Safari 5.0 bug
+			return (Object.keys(arguments) || '').length === 2;
+		}(1, 2));
+		if (!keysWorksWithArguments) {
+			var originalKeys = Object.keys;
+			Object.keys = function keys(object) { // eslint-disable-line func-name-matching
+				if (isArgs(object)) {
+					return originalKeys(slice.call(object));
+				} else {
+					return originalKeys(object);
+				}
+			};
+		}
+	} else {
+		Object.keys = keysShim;
+	}
+	return Object.keys || keysShim;
+};
+
+module.exports = keysShim;
+
+},{"./isArguments":62}],62:[function(require,module,exports){
+'use strict';
+
+var toStr = Object.prototype.toString;
+
+module.exports = function isArguments(value) {
+	var str = toStr.call(value);
+	var isArgs = str === '[object Arguments]';
+	if (!isArgs) {
+		isArgs = str !== '[object Array]' &&
+			value !== null &&
+			typeof value === 'object' &&
+			typeof value.length === 'number' &&
+			value.length >= 0 &&
+			toStr.call(value.callee) === '[object Function]';
+	}
+	return isArgs;
+};
+
+},{}],63:[function(require,module,exports){
+'use strict';
+
+// modified from https://github.com/es-shims/es6-shim
+var keys = require('object-keys');
+var bind = require('function-bind');
+var canBeObject = function (obj) {
+	return typeof obj !== 'undefined' && obj !== null;
+};
+var hasSymbols = require('has-symbols/shams')();
+var toObject = Object;
+var push = bind.call(Function.call, Array.prototype.push);
+var propIsEnumerable = bind.call(Function.call, Object.prototype.propertyIsEnumerable);
+var originalGetSymbols = hasSymbols ? Object.getOwnPropertySymbols : null;
+
+module.exports = function assign(target, source1) {
+	if (!canBeObject(target)) { throw new TypeError('target must be an object'); }
+	var objTarget = toObject(target);
+	var s, source, i, props, syms, value, key;
+	for (s = 1; s < arguments.length; ++s) {
+		source = toObject(arguments[s]);
+		props = keys(source);
+		var getSymbols = hasSymbols && (Object.getOwnPropertySymbols || originalGetSymbols);
+		if (getSymbols) {
+			syms = getSymbols(source);
+			for (i = 0; i < syms.length; ++i) {
+				key = syms[i];
+				if (propIsEnumerable(source, key)) {
+					push(props, key);
+				}
+			}
+		}
+		for (i = 0; i < props.length; ++i) {
+			key = props[i];
+			value = source[key];
+			if (propIsEnumerable(source, key)) {
+				objTarget[key] = value;
+			}
+		}
+	}
+	return objTarget;
+};
+
+},{"function-bind":52,"has-symbols/shams":53,"object-keys":61}],64:[function(require,module,exports){
+'use strict';
+
+var defineProperties = require('define-properties');
+
+var implementation = require('./implementation');
+var getPolyfill = require('./polyfill');
+var shim = require('./shim');
+
+var polyfill = getPolyfill();
+
+defineProperties(polyfill, {
+	getPolyfill: getPolyfill,
+	implementation: implementation,
+	shim: shim
+});
+
+module.exports = polyfill;
+
+},{"./implementation":63,"./polyfill":65,"./shim":66,"define-properties":47}],65:[function(require,module,exports){
+'use strict';
+
+var implementation = require('./implementation');
+
+var lacksProperEnumerationOrder = function () {
+	if (!Object.assign) {
+		return false;
+	}
+	// v8, specifically in node 4.x, has a bug with incorrect property enumeration order
+	// note: this does not detect the bug unless there's 20 characters
+	var str = 'abcdefghijklmnopqrst';
+	var letters = str.split('');
+	var map = {};
+	for (var i = 0; i < letters.length; ++i) {
+		map[letters[i]] = letters[i];
+	}
+	var obj = Object.assign({}, map);
+	var actual = '';
+	for (var k in obj) {
+		actual += k;
+	}
+	return str !== actual;
+};
+
+var assignHasPendingExceptions = function () {
+	if (!Object.assign || !Object.preventExtensions) {
+		return false;
+	}
+	// Firefox 37 still has "pending exception" logic in its Object.assign implementation,
+	// which is 72% slower than our shim, and Firefox 40's native implementation.
+	var thrower = Object.preventExtensions({ 1: 2 });
+	try {
+		Object.assign(thrower, 'xy');
+	} catch (e) {
+		return thrower[1] === 'y';
+	}
+	return false;
+};
+
+module.exports = function getPolyfill() {
+	if (!Object.assign) {
+		return implementation;
+	}
+	if (lacksProperEnumerationOrder()) {
+		return implementation;
+	}
+	if (assignHasPendingExceptions()) {
+		return implementation;
+	}
+	return Object.assign;
+};
+
+},{"./implementation":63}],66:[function(require,module,exports){
+'use strict';
+
+var define = require('define-properties');
+var getPolyfill = require('./polyfill');
+
+module.exports = function shimAssign() {
+	var polyfill = getPolyfill();
+	define(
+		Object,
+		{ assign: polyfill },
+		{ assign: function () { return Object.assign !== polyfill; } }
+	);
+	return polyfill;
+};
+
+},{"./polyfill":65,"define-properties":47}],67:[function(require,module,exports){
+(function (process){
+'use strict';
+
+if (!process.version ||
+    process.version.indexOf('v0.') === 0 ||
+    process.version.indexOf('v1.') === 0 && process.version.indexOf('v1.8.') !== 0) {
+  module.exports = { nextTick: nextTick };
+} else {
+  module.exports = process
+}
+
+function nextTick(fn, arg1, arg2, arg3) {
+  if (typeof fn !== 'function') {
+    throw new TypeError('"callback" argument must be a function');
+  }
+  var len = arguments.length;
+  var args, i;
+  switch (len) {
+  case 0:
+  case 1:
+    return process.nextTick(fn);
+  case 2:
+    return process.nextTick(function afterTickOne() {
+      fn.call(null, arg1);
+    });
+  case 3:
+    return process.nextTick(function afterTickTwo() {
+      fn.call(null, arg1, arg2);
+    });
+  case 4:
+    return process.nextTick(function afterTickThree() {
+      fn.call(null, arg1, arg2, arg3);
+    });
+  default:
+    args = new Array(len - 1);
+    i = 0;
+    while (i < args.length) {
+      args[i++] = arguments[i];
+    }
+    return process.nextTick(function afterTick() {
+      fn.apply(null, args);
+    });
+  }
+}
+
+
+}).call(this,require('_process'))
+},{"_process":68}],68:[function(require,module,exports){
+// shim for using process in browser
+var process = module.exports = {};
+
+// cached from whatever global is present so that test runners that stub it
+// don't break things.  But we need to wrap it in a try catch in case it is
+// wrapped in strict mode code which doesn't define any globals.  It's inside a
+// function because try/catches deoptimize in certain engines.
+
+var cachedSetTimeout;
+var cachedClearTimeout;
+
+function defaultSetTimout() {
+    throw new Error('setTimeout has not been defined');
+}
+function defaultClearTimeout () {
+    throw new Error('clearTimeout has not been defined');
+}
+(function () {
+    try {
+        if (typeof setTimeout === 'function') {
+            cachedSetTimeout = setTimeout;
+        } else {
+            cachedSetTimeout = defaultSetTimout;
+        }
+    } catch (e) {
+        cachedSetTimeout = defaultSetTimout;
+    }
+    try {
+        if (typeof clearTimeout === 'function') {
+            cachedClearTimeout = clearTimeout;
+        } else {
+            cachedClearTimeout = defaultClearTimeout;
+        }
+    } catch (e) {
+        cachedClearTimeout = defaultClearTimeout;
+    }
+} ())
+function runTimeout(fun) {
+    if (cachedSetTimeout === setTimeout) {
+        //normal enviroments in sane situations
+        return setTimeout(fun, 0);
+    }
+    // if setTimeout wasn't available but was latter defined
+    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
+        cachedSetTimeout = setTimeout;
+        return setTimeout(fun, 0);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedSetTimeout(fun, 0);
+    } catch(e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
+            return cachedSetTimeout.call(null, fun, 0);
+        } catch(e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
+            return cachedSetTimeout.call(this, fun, 0);
+        }
+    }
+
+
+}
+function runClearTimeout(marker) {
+    if (cachedClearTimeout === clearTimeout) {
+        //normal enviroments in sane situations
+        return clearTimeout(marker);
+    }
+    // if clearTimeout wasn't available but was latter defined
+    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
+        cachedClearTimeout = clearTimeout;
+        return clearTimeout(marker);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedClearTimeout(marker);
+    } catch (e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
+            return cachedClearTimeout.call(null, marker);
+        } catch (e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
+            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
+            return cachedClearTimeout.call(this, marker);
+        }
+    }
+
+
+
+}
+var queue = [];
+var draining = false;
+var currentQueue;
+var queueIndex = -1;
+
+function cleanUpNextTick() {
+    if (!draining || !currentQueue) {
+        return;
+    }
+    draining = false;
+    if (currentQueue.length) {
+        queue = currentQueue.concat(queue);
+    } else {
+        queueIndex = -1;
+    }
+    if (queue.length) {
+        drainQueue();
+    }
+}
+
+function drainQueue() {
+    if (draining) {
+        return;
+    }
+    var timeout = runTimeout(cleanUpNextTick);
+    draining = true;
+
+    var len = queue.length;
+    while(len) {
+        currentQueue = queue;
+        queue = [];
+        while (++queueIndex < len) {
+            if (currentQueue) {
+                currentQueue[queueIndex].run();
+            }
+        }
+        queueIndex = -1;
+        len = queue.length;
+    }
+    currentQueue = null;
+    draining = false;
+    runClearTimeout(timeout);
+}
+
+process.nextTick = function (fun) {
+    var args = new Array(arguments.length - 1);
+    if (arguments.length > 1) {
+        for (var i = 1; i < arguments.length; i++) {
+            args[i - 1] = arguments[i];
+        }
+    }
+    queue.push(new Item(fun, args));
+    if (queue.length === 1 && !draining) {
+        runTimeout(drainQueue);
+    }
+};
+
+// v8 likes predictible objects
+function Item(fun, array) {
+    this.fun = fun;
+    this.array = array;
+}
+Item.prototype.run = function () {
+    this.fun.apply(null, this.array);
+};
+process.title = 'browser';
+process.browser = true;
+process.env = {};
+process.argv = [];
+process.version = ''; // empty string to avoid regexp issues
+process.versions = {};
+
+function noop() {}
+
+process.on = noop;
+process.addListener = noop;
+process.once = noop;
+process.off = noop;
+process.removeListener = noop;
+process.removeAllListeners = noop;
+process.emit = noop;
+process.prependListener = noop;
+process.prependOnceListener = noop;
+
+process.listeners = function (name) { return [] }
+
+process.binding = function (name) {
+    throw new Error('process.binding is not supported');
+};
+
+process.cwd = function () { return '/' };
+process.chdir = function (dir) {
+    throw new Error('process.chdir is not supported');
+};
+process.umask = function() { return 0; };
+
+},{}],69:[function(require,module,exports){
+module.exports = require('./lib/_stream_duplex.js');
+
+},{"./lib/_stream_duplex.js":70}],70:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a duplex stream is just a stream that is both readable and writable.
+// Since JS doesn't have multiple prototypal inheritance, this class
+// prototypally inherits from Readable, and then parasitically from
+// Writable.
+
+'use strict';
+
+/*<replacement>*/
+
+var pna = require('process-nextick-args');
+/*</replacement>*/
+
+/*<replacement>*/
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) {
+    keys.push(key);
+  }return keys;
+};
+/*</replacement>*/
+
+module.exports = Duplex;
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+var Readable = require('./_stream_readable');
+var Writable = require('./_stream_writable');
+
+util.inherits(Duplex, Readable);
+
+{
+  // avoid scope creep, the keys array can then be collected
+  var keys = objectKeys(Writable.prototype);
+  for (var v = 0; v < keys.length; v++) {
+    var method = keys[v];
+    if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
+  }
+}
+
+function Duplex(options) {
+  if (!(this instanceof Duplex)) return new Duplex(options);
+
+  Readable.call(this, options);
+  Writable.call(this, options);
+
+  if (options && options.readable === false) this.readable = false;
+
+  if (options && options.writable === false) this.writable = false;
+
+  this.allowHalfOpen = true;
+  if (options && options.allowHalfOpen === false) this.allowHalfOpen = false;
+
+  this.once('end', onend);
+}
+
+Object.defineProperty(Duplex.prototype, 'writableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function () {
+    return this._writableState.highWaterMark;
+  }
+});
+
+// the no-half-open enforcer
+function onend() {
+  // if we allow half-open state, or if the writable side ended,
+  // then we're ok.
+  if (this.allowHalfOpen || this._writableState.ended) return;
+
+  // no more data can be written.
+  // But allow more writes to happen in this tick.
+  pna.nextTick(onEndNT, this);
+}
+
+function onEndNT(self) {
+  self.end();
+}
+
+Object.defineProperty(Duplex.prototype, 'destroyed', {
+  get: function () {
+    if (this._readableState === undefined || this._writableState === undefined) {
+      return false;
+    }
+    return this._readableState.destroyed && this._writableState.destroyed;
+  },
+  set: function (value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (this._readableState === undefined || this._writableState === undefined) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._readableState.destroyed = value;
+    this._writableState.destroyed = value;
+  }
+});
+
+Duplex.prototype._destroy = function (err, cb) {
+  this.push(null);
+  this.end();
+
+  pna.nextTick(cb, err);
+};
+},{"./_stream_readable":72,"./_stream_writable":74,"core-util-is":44,"inherits":56,"process-nextick-args":67}],71:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a passthrough stream.
+// basically just the most minimal sort of Transform stream.
+// Every written chunk gets output as-is.
+
+'use strict';
+
+module.exports = PassThrough;
+
+var Transform = require('./_stream_transform');
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+util.inherits(PassThrough, Transform);
+
+function PassThrough(options) {
+  if (!(this instanceof PassThrough)) return new PassThrough(options);
+
+  Transform.call(this, options);
+}
+
+PassThrough.prototype._transform = function (chunk, encoding, cb) {
+  cb(null, chunk);
+};
+},{"./_stream_transform":73,"core-util-is":44,"inherits":56}],72:[function(require,module,exports){
+(function (process,global){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+
+/*<replacement>*/
+
+var pna = require('process-nextick-args');
+/*</replacement>*/
+
+module.exports = Readable;
+
+/*<replacement>*/
+var isArray = require('isarray');
+/*</replacement>*/
+
+/*<replacement>*/
+var Duplex;
+/*</replacement>*/
+
+Readable.ReadableState = ReadableState;
+
+/*<replacement>*/
+var EE = require('events').EventEmitter;
+
+var EElistenerCount = function (emitter, type) {
+  return emitter.listeners(type).length;
+};
+/*</replacement>*/
+
+/*<replacement>*/
+var Stream = require('./internal/streams/stream');
+/*</replacement>*/
+
+/*<replacement>*/
+
+var Buffer = require('safe-buffer').Buffer;
+var OurUint8Array = global.Uint8Array || function () {};
+function _uint8ArrayToBuffer(chunk) {
+  return Buffer.from(chunk);
+}
+function _isUint8Array(obj) {
+  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
+}
+
+/*</replacement>*/
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+/*<replacement>*/
+var debugUtil = require('util');
+var debug = void 0;
+if (debugUtil && debugUtil.debuglog) {
+  debug = debugUtil.debuglog('stream');
+} else {
+  debug = function () {};
+}
+/*</replacement>*/
+
+var BufferList = require('./internal/streams/BufferList');
+var destroyImpl = require('./internal/streams/destroy');
+var StringDecoder;
+
+util.inherits(Readable, Stream);
+
+var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];
+
+function prependListener(emitter, event, fn) {
+  // Sadly this is not cacheable as some libraries bundle their own
+  // event emitter implementation with them.
+  if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn);
+
+  // This is a hack to make sure that our error handler is attached before any
+  // userland ones.  NEVER DO THIS. This is here only because this code needs
+  // to continue to work with older versions of Node.js that do not include
+  // the prependListener() method. The goal is to eventually remove this hack.
+  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
+}
+
+function ReadableState(options, stream) {
+  Duplex = Duplex || require('./_stream_duplex');
+
+  options = options || {};
+
+  // Duplex streams are both readable and writable, but share
+  // the same options object.
+  // However, some cases require setting options to different
+  // values for the readable and the writable sides of the duplex stream.
+  // These options can be provided separately as readableXXX and writableXXX.
+  var isDuplex = stream instanceof Duplex;
+
+  // object stream flag. Used to make read(n) ignore n and to
+  // make all the buffer merging and length checks go away
+  this.objectMode = !!options.objectMode;
+
+  if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode;
+
+  // the point at which it stops calling _read() to fill the buffer
+  // Note: 0 is a valid value, means "don't call _read preemptively ever"
+  var hwm = options.highWaterMark;
+  var readableHwm = options.readableHighWaterMark;
+  var defaultHwm = this.objectMode ? 16 : 16 * 1024;
+
+  if (hwm || hwm === 0) this.highWaterMark = hwm;else if (isDuplex && (readableHwm || readableHwm === 0)) this.highWaterMark = readableHwm;else this.highWaterMark = defaultHwm;
+
+  // cast to ints.
+  this.highWaterMark = Math.floor(this.highWaterMark);
+
+  // A linked list is used to store data chunks instead of an array because the
+  // linked list can remove elements from the beginning faster than
+  // array.shift()
+  this.buffer = new BufferList();
+  this.length = 0;
+  this.pipes = null;
+  this.pipesCount = 0;
+  this.flowing = null;
+  this.ended = false;
+  this.endEmitted = false;
+  this.reading = false;
+
+  // a flag to be able to tell if the event 'readable'/'data' is emitted
+  // immediately, or on a later tick.  We set this to true at first, because
+  // any actions that shouldn't happen until "later" should generally also
+  // not happen before the first read call.
+  this.sync = true;
+
+  // whenever we return null, then we set a flag to say
+  // that we're awaiting a 'readable' event emission.
+  this.needReadable = false;
+  this.emittedReadable = false;
+  this.readableListening = false;
+  this.resumeScheduled = false;
+
+  // has it been destroyed
+  this.destroyed = false;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // the number of writers that are awaiting a drain event in .pipe()s
+  this.awaitDrain = 0;
+
+  // if true, a maybeReadMore has been scheduled
+  this.readingMore = false;
+
+  this.decoder = null;
+  this.encoding = null;
+  if (options.encoding) {
+    if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
+    this.decoder = new StringDecoder(options.encoding);
+    this.encoding = options.encoding;
+  }
+}
+
+function Readable(options) {
+  Duplex = Duplex || require('./_stream_duplex');
+
+  if (!(this instanceof Readable)) return new Readable(options);
+
+  this._readableState = new ReadableState(options, this);
+
+  // legacy
+  this.readable = true;
+
+  if (options) {
+    if (typeof options.read === 'function') this._read = options.read;
+
+    if (typeof options.destroy === 'function') this._destroy = options.destroy;
+  }
+
+  Stream.call(this);
+}
+
+Object.defineProperty(Readable.prototype, 'destroyed', {
+  get: function () {
+    if (this._readableState === undefined) {
+      return false;
+    }
+    return this._readableState.destroyed;
+  },
+  set: function (value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (!this._readableState) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._readableState.destroyed = value;
+  }
+});
+
+Readable.prototype.destroy = destroyImpl.destroy;
+Readable.prototype._undestroy = destroyImpl.undestroy;
+Readable.prototype._destroy = function (err, cb) {
+  this.push(null);
+  cb(err);
+};
+
+// Manually shove something into the read() buffer.
+// This returns true if the highWaterMark has not been hit yet,
+// similar to how Writable.write() returns true if you should
+// write() some more.
+Readable.prototype.push = function (chunk, encoding) {
+  var state = this._readableState;
+  var skipChunkCheck;
+
+  if (!state.objectMode) {
+    if (typeof chunk === 'string') {
+      encoding = encoding || state.defaultEncoding;
+      if (encoding !== state.encoding) {
+        chunk = Buffer.from(chunk, encoding);
+        encoding = '';
+      }
+      skipChunkCheck = true;
+    }
+  } else {
+    skipChunkCheck = true;
+  }
+
+  return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);
+};
+
+// Unshift should *always* be something directly out of read()
+Readable.prototype.unshift = function (chunk) {
+  return readableAddChunk(this, chunk, null, true, false);
+};
+
+function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {
+  var state = stream._readableState;
+  if (chunk === null) {
+    state.reading = false;
+    onEofChunk(stream, state);
+  } else {
+    var er;
+    if (!skipChunkCheck) er = chunkInvalid(state, chunk);
+    if (er) {
+      stream.emit('error', er);
+    } else if (state.objectMode || chunk && chunk.length > 0) {
+      if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {
+        chunk = _uint8ArrayToBuffer(chunk);
+      }
+
+      if (addToFront) {
+        if (state.endEmitted) stream.emit('error', new Error('stream.unshift() after end event'));else addChunk(stream, state, chunk, true);
+      } else if (state.ended) {
+        stream.emit('error', new Error('stream.push() after EOF'));
+      } else {
+        state.reading = false;
+        if (state.decoder && !encoding) {
+          chunk = state.decoder.write(chunk);
+          if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);
+        } else {
+          addChunk(stream, state, chunk, false);
+        }
+      }
+    } else if (!addToFront) {
+      state.reading = false;
+    }
+  }
+
+  return needMoreData(state);
+}
+
+function addChunk(stream, state, chunk, addToFront) {
+  if (state.flowing && state.length === 0 && !state.sync) {
+    stream.emit('data', chunk);
+    stream.read(0);
+  } else {
+    // update the buffer info.
+    state.length += state.objectMode ? 1 : chunk.length;
+    if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);
+
+    if (state.needReadable) emitReadable(stream);
+  }
+  maybeReadMore(stream, state);
+}
+
+function chunkInvalid(state, chunk) {
+  var er;
+  if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
+    er = new TypeError('Invalid non-string/buffer chunk');
+  }
+  return er;
+}
+
+// if it's past the high water mark, we can push in some more.
+// Also, if we have no data yet, we can stand some
+// more bytes.  This is to work around cases where hwm=0,
+// such as the repl.  Also, if the push() triggered a
+// readable event, and the user called read(largeNumber) such that
+// needReadable was set, then we ought to push more, so that another
+// 'readable' event will be triggered.
+function needMoreData(state) {
+  return !state.ended && (state.needReadable || state.length < state.highWaterMark || state.length === 0);
+}
+
+Readable.prototype.isPaused = function () {
+  return this._readableState.flowing === false;
+};
+
+// backwards compatibility.
+Readable.prototype.setEncoding = function (enc) {
+  if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
+  this._readableState.decoder = new StringDecoder(enc);
+  this._readableState.encoding = enc;
+  return this;
+};
+
+// Don't raise the hwm > 8MB
+var MAX_HWM = 0x800000;
+function computeNewHighWaterMark(n) {
+  if (n >= MAX_HWM) {
+    n = MAX_HWM;
+  } else {
+    // Get the next highest power of 2 to prevent increasing hwm excessively in
+    // tiny amounts
+    n--;
+    n |= n >>> 1;
+    n |= n >>> 2;
+    n |= n >>> 4;
+    n |= n >>> 8;
+    n |= n >>> 16;
+    n++;
+  }
+  return n;
+}
+
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function howMuchToRead(n, state) {
+  if (n <= 0 || state.length === 0 && state.ended) return 0;
+  if (state.objectMode) return 1;
+  if (n !== n) {
+    // Only flow one buffer at a time
+    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
+  }
+  // If we're asking for more than the current hwm, then raise the hwm.
+  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
+  if (n <= state.length) return n;
+  // Don't have enough
+  if (!state.ended) {
+    state.needReadable = true;
+    return 0;
+  }
+  return state.length;
+}
+
+// you can override either this method, or the async _read(n) below.
+Readable.prototype.read = function (n) {
+  debug('read', n);
+  n = parseInt(n, 10);
+  var state = this._readableState;
+  var nOrig = n;
+
+  if (n !== 0) state.emittedReadable = false;
+
+  // if we're doing read(0) to trigger a readable event, but we
+  // already have a bunch of data in the buffer, then just trigger
+  // the 'readable' event and move on.
+  if (n === 0 && state.needReadable && (state.length >= state.highWaterMark || state.ended)) {
+    debug('read: emitReadable', state.length, state.ended);
+    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);
+    return null;
+  }
+
+  n = howMuchToRead(n, state);
+
+  // if we've ended, and we're now clear, then finish it up.
+  if (n === 0 && state.ended) {
+    if (state.length === 0) endReadable(this);
+    return null;
+  }
+
+  // All the actual chunk generation logic needs to be
+  // *below* the call to _read.  The reason is that in certain
+  // synthetic stream cases, such as passthrough streams, _read
+  // may be a completely synchronous operation which may change
+  // the state of the read buffer, providing enough data when
+  // before there was *not* enough.
+  //
+  // So, the steps are:
+  // 1. Figure out what the state of things will be after we do
+  // a read from the buffer.
+  //
+  // 2. If that resulting state will trigger a _read, then call _read.
+  // Note that this may be asynchronous, or synchronous.  Yes, it is
+  // deeply ugly to write APIs this way, but that still doesn't mean
+  // that the Readable class should behave improperly, as streams are
+  // designed to be sync/async agnostic.
+  // Take note if the _read call is sync or async (ie, if the read call
+  // has returned yet), so that we know whether or not it's safe to emit
+  // 'readable' etc.
+  //
+  // 3. Actually pull the requested chunks out of the buffer and return.
+
+  // if we need a readable event, then we need to do some reading.
+  var doRead = state.needReadable;
+  debug('need readable', doRead);
+
+  // if we currently have less than the highWaterMark, then also read some
+  if (state.length === 0 || state.length - n < state.highWaterMark) {
+    doRead = true;
+    debug('length less than watermark', doRead);
+  }
+
+  // however, if we've ended, then there's no point, and if we're already
+  // reading, then it's unnecessary.
+  if (state.ended || state.reading) {
+    doRead = false;
+    debug('reading or ended', doRead);
+  } else if (doRead) {
+    debug('do read');
+    state.reading = true;
+    state.sync = true;
+    // if the length is currently zero, then we *need* a readable event.
+    if (state.length === 0) state.needReadable = true;
+    // call internal read method
+    this._read(state.highWaterMark);
+    state.sync = false;
+    // If _read pushed data synchronously, then `reading` will be false,
+    // and we need to re-evaluate how much data we can return to the user.
+    if (!state.reading) n = howMuchToRead(nOrig, state);
+  }
+
+  var ret;
+  if (n > 0) ret = fromList(n, state);else ret = null;
+
+  if (ret === null) {
+    state.needReadable = true;
+    n = 0;
+  } else {
+    state.length -= n;
+  }
+
+  if (state.length === 0) {
+    // If we have nothing in the buffer, then we want to know
+    // as soon as we *do* get something into the buffer.
+    if (!state.ended) state.needReadable = true;
+
+    // If we tried to read() past the EOF, then emit end on the next tick.
+    if (nOrig !== n && state.ended) endReadable(this);
+  }
+
+  if (ret !== null) this.emit('data', ret);
+
+  return ret;
+};
+
+function onEofChunk(stream, state) {
+  if (state.ended) return;
+  if (state.decoder) {
+    var chunk = state.decoder.end();
+    if (chunk && chunk.length) {
+      state.buffer.push(chunk);
+      state.length += state.objectMode ? 1 : chunk.length;
+    }
+  }
+  state.ended = true;
+
+  // emit 'readable' now to make sure it gets picked up.
+  emitReadable(stream);
+}
+
+// Don't emit readable right away in sync mode, because this can trigger
+// another read() call => stack overflow.  This way, it might trigger
+// a nextTick recursion warning, but that's not so bad.
+function emitReadable(stream) {
+  var state = stream._readableState;
+  state.needReadable = false;
+  if (!state.emittedReadable) {
+    debug('emitReadable', state.flowing);
+    state.emittedReadable = true;
+    if (state.sync) pna.nextTick(emitReadable_, stream);else emitReadable_(stream);
+  }
+}
+
+function emitReadable_(stream) {
+  debug('emit readable');
+  stream.emit('readable');
+  flow(stream);
+}
+
+// at this point, the user has presumably seen the 'readable' event,
+// and called read() to consume some data.  that may have triggered
+// in turn another _read(n) call, in which case reading = true if
+// it's in progress.
+// However, if we're not ended, or reading, and the length < hwm,
+// then go ahead and try to read some more preemptively.
+function maybeReadMore(stream, state) {
+  if (!state.readingMore) {
+    state.readingMore = true;
+    pna.nextTick(maybeReadMore_, stream, state);
+  }
+}
+
+function maybeReadMore_(stream, state) {
+  var len = state.length;
+  while (!state.reading && !state.flowing && !state.ended && state.length < state.highWaterMark) {
+    debug('maybeReadMore read 0');
+    stream.read(0);
+    if (len === state.length)
+      // didn't get any data, stop spinning.
+      break;else len = state.length;
+  }
+  state.readingMore = false;
+}
+
+// abstract method.  to be overridden in specific implementation classes.
+// call cb(er, data) where data is <= n in length.
+// for virtual (non-string, non-buffer) streams, "length" is somewhat
+// arbitrary, and perhaps not very meaningful.
+Readable.prototype._read = function (n) {
+  this.emit('error', new Error('_read() is not implemented'));
+};
+
+Readable.prototype.pipe = function (dest, pipeOpts) {
+  var src = this;
+  var state = this._readableState;
+
+  switch (state.pipesCount) {
+    case 0:
+      state.pipes = dest;
+      break;
+    case 1:
+      state.pipes = [state.pipes, dest];
+      break;
+    default:
+      state.pipes.push(dest);
+      break;
+  }
+  state.pipesCount += 1;
+  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
+
+  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;
+
+  var endFn = doEnd ? onend : unpipe;
+  if (state.endEmitted) pna.nextTick(endFn);else src.once('end', endFn);
+
+  dest.on('unpipe', onunpipe);
+  function onunpipe(readable, unpipeInfo) {
+    debug('onunpipe');
+    if (readable === src) {
+      if (unpipeInfo && unpipeInfo.hasUnpiped === false) {
+        unpipeInfo.hasUnpiped = true;
+        cleanup();
+      }
+    }
+  }
+
+  function onend() {
+    debug('onend');
+    dest.end();
+  }
+
+  // when the dest drains, it reduces the awaitDrain counter
+  // on the source.  This would be more elegant with a .once()
+  // handler in flow(), but adding and removing repeatedly is
+  // too slow.
+  var ondrain = pipeOnDrain(src);
+  dest.on('drain', ondrain);
+
+  var cleanedUp = false;
+  function cleanup() {
+    debug('cleanup');
+    // cleanup event handlers once the pipe is broken
+    dest.removeListener('close', onclose);
+    dest.removeListener('finish', onfinish);
+    dest.removeListener('drain', ondrain);
+    dest.removeListener('error', onerror);
+    dest.removeListener('unpipe', onunpipe);
+    src.removeListener('end', onend);
+    src.removeListener('end', unpipe);
+    src.removeListener('data', ondata);
+
+    cleanedUp = true;
+
+    // if the reader is waiting for a drain event from this
+    // specific writer, then it would cause it to never start
+    // flowing again.
+    // So, if this is awaiting a drain, then we just call it now.
+    // If we don't know, then assume that we are waiting for one.
+    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
+  }
+
+  // If the user pushes more data while we're writing to dest then we'll end up
+  // in ondata again. However, we only want to increase awaitDrain once because
+  // dest will only emit one 'drain' event for the multiple writes.
+  // => Introduce a guard on increasing awaitDrain.
+  var increasedAwaitDrain = false;
+  src.on('data', ondata);
+  function ondata(chunk) {
+    debug('ondata');
+    increasedAwaitDrain = false;
+    var ret = dest.write(chunk);
+    if (false === ret && !increasedAwaitDrain) {
+      // If the user unpiped during `dest.write()`, it is possible
+      // to get stuck in a permanently paused state if that write
+      // also returned false.
+      // => Check whether `dest` is still a piping destination.
+      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
+        debug('false write response, pause', src._readableState.awaitDrain);
+        src._readableState.awaitDrain++;
+        increasedAwaitDrain = true;
+      }
+      src.pause();
+    }
+  }
+
+  // if the dest has an error, then stop piping into it.
+  // however, don't suppress the throwing behavior for this.
+  function onerror(er) {
+    debug('onerror', er);
+    unpipe();
+    dest.removeListener('error', onerror);
+    if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er);
+  }
+
+  // Make sure our error handler is attached before userland ones.
+  prependListener(dest, 'error', onerror);
+
+  // Both close and finish should trigger unpipe, but only once.
+  function onclose() {
+    dest.removeListener('finish', onfinish);
+    unpipe();
+  }
+  dest.once('close', onclose);
+  function onfinish() {
+    debug('onfinish');
+    dest.removeListener('close', onclose);
+    unpipe();
+  }
+  dest.once('finish', onfinish);
+
+  function unpipe() {
+    debug('unpipe');
+    src.unpipe(dest);
+  }
+
+  // tell the dest that it's being piped to
+  dest.emit('pipe', src);
+
+  // start the flow if it hasn't been started already.
+  if (!state.flowing) {
+    debug('pipe resume');
+    src.resume();
+  }
+
+  return dest;
+};
+
+function pipeOnDrain(src) {
+  return function () {
+    var state = src._readableState;
+    debug('pipeOnDrain', state.awaitDrain);
+    if (state.awaitDrain) state.awaitDrain--;
+    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {
+      state.flowing = true;
+      flow(src);
+    }
+  };
+}
+
+Readable.prototype.unpipe = function (dest) {
+  var state = this._readableState;
+  var unpipeInfo = { hasUnpiped: false };
+
+  // if we're not piping anywhere, then do nothing.
+  if (state.pipesCount === 0) return this;
+
+  // just one destination.  most common case.
+  if (state.pipesCount === 1) {
+    // passed in one, but it's not the right one.
+    if (dest && dest !== state.pipes) return this;
+
+    if (!dest) dest = state.pipes;
+
+    // got a match.
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+    if (dest) dest.emit('unpipe', this, unpipeInfo);
+    return this;
+  }
+
+  // slow case. multiple pipe destinations.
+
+  if (!dest) {
+    // remove all.
+    var dests = state.pipes;
+    var len = state.pipesCount;
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+
+    for (var i = 0; i < len; i++) {
+      dests[i].emit('unpipe', this, unpipeInfo);
+    }return this;
+  }
+
+  // try to find the right one.
+  var index = indexOf(state.pipes, dest);
+  if (index === -1) return this;
+
+  state.pipes.splice(index, 1);
+  state.pipesCount -= 1;
+  if (state.pipesCount === 1) state.pipes = state.pipes[0];
+
+  dest.emit('unpipe', this, unpipeInfo);
+
+  return this;
+};
+
+// set up data events if they are asked for
+// Ensure readable listeners eventually get something
+Readable.prototype.on = function (ev, fn) {
+  var res = Stream.prototype.on.call(this, ev, fn);
+
+  if (ev === 'data') {
+    // Start flowing on next tick if stream isn't explicitly paused
+    if (this._readableState.flowing !== false) this.resume();
+  } else if (ev === 'readable') {
+    var state = this._readableState;
+    if (!state.endEmitted && !state.readableListening) {
+      state.readableListening = state.needReadable = true;
+      state.emittedReadable = false;
+      if (!state.reading) {
+        pna.nextTick(nReadingNextTick, this);
+      } else if (state.length) {
+        emitReadable(this);
+      }
+    }
+  }
+
+  return res;
+};
+Readable.prototype.addListener = Readable.prototype.on;
+
+function nReadingNextTick(self) {
+  debug('readable nexttick read 0');
+  self.read(0);
+}
+
+// pause() and resume() are remnants of the legacy readable stream API
+// If the user uses them, then switch into old mode.
+Readable.prototype.resume = function () {
+  var state = this._readableState;
+  if (!state.flowing) {
+    debug('resume');
+    state.flowing = true;
+    resume(this, state);
+  }
+  return this;
+};
+
+function resume(stream, state) {
+  if (!state.resumeScheduled) {
+    state.resumeScheduled = true;
+    pna.nextTick(resume_, stream, state);
+  }
+}
+
+function resume_(stream, state) {
+  if (!state.reading) {
+    debug('resume read 0');
+    stream.read(0);
+  }
+
+  state.resumeScheduled = false;
+  state.awaitDrain = 0;
+  stream.emit('resume');
+  flow(stream);
+  if (state.flowing && !state.reading) stream.read(0);
+}
+
+Readable.prototype.pause = function () {
+  debug('call pause flowing=%j', this._readableState.flowing);
+  if (false !== this._readableState.flowing) {
+    debug('pause');
+    this._readableState.flowing = false;
+    this.emit('pause');
+  }
+  return this;
+};
+
+function flow(stream) {
+  var state = stream._readableState;
+  debug('flow', state.flowing);
+  while (state.flowing && stream.read() !== null) {}
+}
+
+// wrap an old-style stream as the async data source.
+// This is *not* part of the readable stream interface.
+// It is an ugly unfortunate mess of history.
+Readable.prototype.wrap = function (stream) {
+  var _this = this;
+
+  var state = this._readableState;
+  var paused = false;
+
+  stream.on('end', function () {
+    debug('wrapped end');
+    if (state.decoder && !state.ended) {
+      var chunk = state.decoder.end();
+      if (chunk && chunk.length) _this.push(chunk);
+    }
+
+    _this.push(null);
+  });
+
+  stream.on('data', function (chunk) {
+    debug('wrapped data');
+    if (state.decoder) chunk = state.decoder.write(chunk);
+
+    // don't skip over falsy values in objectMode
+    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;
+
+    var ret = _this.push(chunk);
+    if (!ret) {
+      paused = true;
+      stream.pause();
+    }
+  });
+
+  // proxy all the other methods.
+  // important when wrapping filters and duplexes.
+  for (var i in stream) {
+    if (this[i] === undefined && typeof stream[i] === 'function') {
+      this[i] = function (method) {
+        return function () {
+          return stream[method].apply(stream, arguments);
+        };
+      }(i);
+    }
+  }
+
+  // proxy certain important events.
+  for (var n = 0; n < kProxyEvents.length; n++) {
+    stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));
+  }
+
+  // when we try to consume some more bytes, simply unpause the
+  // underlying stream.
+  this._read = function (n) {
+    debug('wrapped _read', n);
+    if (paused) {
+      paused = false;
+      stream.resume();
+    }
+  };
+
+  return this;
+};
+
+Object.defineProperty(Readable.prototype, 'readableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function () {
+    return this._readableState.highWaterMark;
+  }
+});
+
+// exposed for testing purposes only.
+Readable._fromList = fromList;
+
+// Pluck off n bytes from an array of buffers.
+// Length is the combined lengths of all the buffers in the list.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function fromList(n, state) {
+  // nothing buffered
+  if (state.length === 0) return null;
+
+  var ret;
+  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
+    // read it all, truncate the list
+    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length);
+    state.buffer.clear();
+  } else {
+    // read part of list
+    ret = fromListPartial(n, state.buffer, state.decoder);
+  }
+
+  return ret;
+}
+
+// Extracts only enough buffered data to satisfy the amount requested.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function fromListPartial(n, list, hasStrings) {
+  var ret;
+  if (n < list.head.data.length) {
+    // slice is the same for buffers and strings
+    ret = list.head.data.slice(0, n);
+    list.head.data = list.head.data.slice(n);
+  } else if (n === list.head.data.length) {
+    // first chunk is a perfect match
+    ret = list.shift();
+  } else {
+    // result spans more than one buffer
+    ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list);
+  }
+  return ret;
+}
+
+// Copies a specified amount of characters from the list of buffered data
+// chunks.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function copyFromBufferString(n, list) {
+  var p = list.head;
+  var c = 1;
+  var ret = p.data;
+  n -= ret.length;
+  while (p = p.next) {
+    var str = p.data;
+    var nb = n > str.length ? str.length : n;
+    if (nb === str.length) ret += str;else ret += str.slice(0, n);
+    n -= nb;
+    if (n === 0) {
+      if (nb === str.length) {
+        ++c;
+        if (p.next) list.head = p.next;else list.head = list.tail = null;
+      } else {
+        list.head = p;
+        p.data = str.slice(nb);
+      }
+      break;
+    }
+    ++c;
+  }
+  list.length -= c;
+  return ret;
+}
+
+// Copies a specified amount of bytes from the list of buffered data chunks.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function copyFromBuffer(n, list) {
+  var ret = Buffer.allocUnsafe(n);
+  var p = list.head;
+  var c = 1;
+  p.data.copy(ret);
+  n -= p.data.length;
+  while (p = p.next) {
+    var buf = p.data;
+    var nb = n > buf.length ? buf.length : n;
+    buf.copy(ret, ret.length - n, 0, nb);
+    n -= nb;
+    if (n === 0) {
+      if (nb === buf.length) {
+        ++c;
+        if (p.next) list.head = p.next;else list.head = list.tail = null;
+      } else {
+        list.head = p;
+        p.data = buf.slice(nb);
+      }
+      break;
+    }
+    ++c;
+  }
+  list.length -= c;
+  return ret;
+}
+
+function endReadable(stream) {
+  var state = stream._readableState;
+
+  // If we get here before consuming all the bytes, then that is a
+  // bug in node.  Should never happen.
+  if (state.length > 0) throw new Error('"endReadable()" called on non-empty stream');
+
+  if (!state.endEmitted) {
+    state.ended = true;
+    pna.nextTick(endReadableNT, state, stream);
+  }
+}
+
+function endReadableNT(state, stream) {
+  // Check that we didn't get one last unshift.
+  if (!state.endEmitted && state.length === 0) {
+    state.endEmitted = true;
+    stream.readable = false;
+    stream.emit('end');
+  }
+}
+
+function indexOf(xs, x) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    if (xs[i] === x) return i;
+  }
+  return -1;
+}
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./_stream_duplex":70,"./internal/streams/BufferList":75,"./internal/streams/destroy":76,"./internal/streams/stream":77,"_process":68,"core-util-is":44,"events":50,"inherits":56,"isarray":58,"process-nextick-args":67,"safe-buffer":82,"string_decoder/":84,"util":40}],73:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a transform stream is a readable/writable stream where you do
+// something with the data.  Sometimes it's called a "filter",
+// but that's not a great name for it, since that implies a thing where
+// some bits pass through, and others are simply ignored.  (That would
+// be a valid example of a transform, of course.)
+//
+// While the output is causally related to the input, it's not a
+// necessarily symmetric or synchronous transformation.  For example,
+// a zlib stream might take multiple plain-text writes(), and then
+// emit a single compressed chunk some time in the future.
+//
+// Here's how this works:
+//
+// The Transform stream has all the aspects of the readable and writable
+// stream classes.  When you write(chunk), that calls _write(chunk,cb)
+// internally, and returns false if there's a lot of pending writes
+// buffered up.  When you call read(), that calls _read(n) until
+// there's enough pending readable data buffered up.
+//
+// In a transform stream, the written data is placed in a buffer.  When
+// _read(n) is called, it transforms the queued up data, calling the
+// buffered _write cb's as it consumes chunks.  If consuming a single
+// written chunk would result in multiple output chunks, then the first
+// outputted bit calls the readcb, and subsequent chunks just go into
+// the read buffer, and will cause it to emit 'readable' if necessary.
+//
+// This way, back-pressure is actually determined by the reading side,
+// since _read has to be called to start processing a new chunk.  However,
+// a pathological inflate type of transform can cause excessive buffering
+// here.  For example, imagine a stream where every byte of input is
+// interpreted as an integer from 0-255, and then results in that many
+// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
+// 1kb of data being output.  In this case, you could write a very small
+// amount of input, and end up with a very large amount of output.  In
+// such a pathological inflating mechanism, there'd be no way to tell
+// the system to stop doing the transform.  A single 4MB write could
+// cause the system to run out of memory.
+//
+// However, even in such a pathological case, only a single written chunk
+// would be consumed, and then the rest would wait (un-transformed) until
+// the results of the previous transformed chunk were consumed.
+
+'use strict';
+
+module.exports = Transform;
+
+var Duplex = require('./_stream_duplex');
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+util.inherits(Transform, Duplex);
+
+function afterTransform(er, data) {
+  var ts = this._transformState;
+  ts.transforming = false;
+
+  var cb = ts.writecb;
+
+  if (!cb) {
+    return this.emit('error', new Error('write callback called multiple times'));
+  }
+
+  ts.writechunk = null;
+  ts.writecb = null;
+
+  if (data != null) // single equals check for both `null` and `undefined`
+    this.push(data);
+
+  cb(er);
+
+  var rs = this._readableState;
+  rs.reading = false;
+  if (rs.needReadable || rs.length < rs.highWaterMark) {
+    this._read(rs.highWaterMark);
+  }
+}
+
+function Transform(options) {
+  if (!(this instanceof Transform)) return new Transform(options);
+
+  Duplex.call(this, options);
+
+  this._transformState = {
+    afterTransform: afterTransform.bind(this),
+    needTransform: false,
+    transforming: false,
+    writecb: null,
+    writechunk: null,
+    writeencoding: null
+  };
+
+  // start out asking for a readable event once data is transformed.
+  this._readableState.needReadable = true;
+
+  // we have implemented the _read method, and done the other things
+  // that Readable wants before the first _read call, so unset the
+  // sync guard flag.
+  this._readableState.sync = false;
+
+  if (options) {
+    if (typeof options.transform === 'function') this._transform = options.transform;
+
+    if (typeof options.flush === 'function') this._flush = options.flush;
+  }
+
+  // When the writable side finishes, then flush out anything remaining.
+  this.on('prefinish', prefinish);
+}
+
+function prefinish() {
+  var _this = this;
+
+  if (typeof this._flush === 'function') {
+    this._flush(function (er, data) {
+      done(_this, er, data);
+    });
+  } else {
+    done(this, null, null);
+  }
+}
+
+Transform.prototype.push = function (chunk, encoding) {
+  this._transformState.needTransform = false;
+  return Duplex.prototype.push.call(this, chunk, encoding);
+};
+
+// This is the part where you do stuff!
+// override this function in implementation classes.
+// 'chunk' is an input chunk.
+//
+// Call `push(newChunk)` to pass along transformed output
+// to the readable side.  You may call 'push' zero or more times.
+//
+// Call `cb(err)` when you are done with this chunk.  If you pass
+// an error, then that'll put the hurt on the whole operation.  If you
+// never call cb(), then you'll never get another chunk.
+Transform.prototype._transform = function (chunk, encoding, cb) {
+  throw new Error('_transform() is not implemented');
+};
+
+Transform.prototype._write = function (chunk, encoding, cb) {
+  var ts = this._transformState;
+  ts.writecb = cb;
+  ts.writechunk = chunk;
+  ts.writeencoding = encoding;
+  if (!ts.transforming) {
+    var rs = this._readableState;
+    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
+  }
+};
+
+// Doesn't matter what the args are here.
+// _transform does all the work.
+// That we got here means that the readable side wants more data.
+Transform.prototype._read = function (n) {
+  var ts = this._transformState;
+
+  if (ts.writechunk !== null && ts.writecb && !ts.transforming) {
+    ts.transforming = true;
+    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
+  } else {
+    // mark that we need a transform, so that any data that comes in
+    // will get processed, now that we've asked for it.
+    ts.needTransform = true;
+  }
+};
+
+Transform.prototype._destroy = function (err, cb) {
+  var _this2 = this;
+
+  Duplex.prototype._destroy.call(this, err, function (err2) {
+    cb(err2);
+    _this2.emit('close');
+  });
+};
+
+function done(stream, er, data) {
+  if (er) return stream.emit('error', er);
+
+  if (data != null) // single equals check for both `null` and `undefined`
+    stream.push(data);
+
+  // if there's nothing in the write buffer, then that means
+  // that nothing more will ever be provided
+  if (stream._writableState.length) throw new Error('Calling transform done when ws.length != 0');
+
+  if (stream._transformState.transforming) throw new Error('Calling transform done when still transforming');
+
+  return stream.push(null);
+}
+},{"./_stream_duplex":70,"core-util-is":44,"inherits":56}],74:[function(require,module,exports){
+(function (process,global){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// A bit simpler than readable streams.
+// Implement an async ._write(chunk, encoding, cb), and it'll handle all
+// the drain event emission and buffering.
+
+'use strict';
+
+/*<replacement>*/
+
+var pna = require('process-nextick-args');
+/*</replacement>*/
+
+module.exports = Writable;
+
+/* <replacement> */
+function WriteReq(chunk, encoding, cb) {
+  this.chunk = chunk;
+  this.encoding = encoding;
+  this.callback = cb;
+  this.next = null;
+}
+
+// It seems a linked list but it is not
+// there will be only 2 of these for each stream
+function CorkedRequest(state) {
+  var _this = this;
+
+  this.next = null;
+  this.entry = null;
+  this.finish = function () {
+    onCorkedFinish(_this, state);
+  };
+}
+/* </replacement> */
+
+/*<replacement>*/
+var asyncWrite = !process.browser && ['v0.10', 'v0.9.'].indexOf(process.version.slice(0, 5)) > -1 ? setImmediate : pna.nextTick;
+/*</replacement>*/
+
+/*<replacement>*/
+var Duplex;
+/*</replacement>*/
+
+Writable.WritableState = WritableState;
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+/*<replacement>*/
+var internalUtil = {
+  deprecate: require('util-deprecate')
+};
+/*</replacement>*/
+
+/*<replacement>*/
+var Stream = require('./internal/streams/stream');
+/*</replacement>*/
+
+/*<replacement>*/
+
+var Buffer = require('safe-buffer').Buffer;
+var OurUint8Array = global.Uint8Array || function () {};
+function _uint8ArrayToBuffer(chunk) {
+  return Buffer.from(chunk);
+}
+function _isUint8Array(obj) {
+  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
+}
+
+/*</replacement>*/
+
+var destroyImpl = require('./internal/streams/destroy');
+
+util.inherits(Writable, Stream);
+
+function nop() {}
+
+function WritableState(options, stream) {
+  Duplex = Duplex || require('./_stream_duplex');
+
+  options = options || {};
+
+  // Duplex streams are both readable and writable, but share
+  // the same options object.
+  // However, some cases require setting options to different
+  // values for the readable and the writable sides of the duplex stream.
+  // These options can be provided separately as readableXXX and writableXXX.
+  var isDuplex = stream instanceof Duplex;
+
+  // object stream flag to indicate whether or not this stream
+  // contains buffers or objects.
+  this.objectMode = !!options.objectMode;
+
+  if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode;
+
+  // the point at which write() starts returning false
+  // Note: 0 is a valid value, means that we always return false if
+  // the entire buffer is not flushed immediately on write()
+  var hwm = options.highWaterMark;
+  var writableHwm = options.writableHighWaterMark;
+  var defaultHwm = this.objectMode ? 16 : 16 * 1024;
+
+  if (hwm || hwm === 0) this.highWaterMark = hwm;else if (isDuplex && (writableHwm || writableHwm === 0)) this.highWaterMark = writableHwm;else this.highWaterMark = defaultHwm;
+
+  // cast to ints.
+  this.highWaterMark = Math.floor(this.highWaterMark);
+
+  // if _final has been called
+  this.finalCalled = false;
+
+  // drain event flag.
+  this.needDrain = false;
+  // at the start of calling end()
+  this.ending = false;
+  // when end() has been called, and returned
+  this.ended = false;
+  // when 'finish' is emitted
+  this.finished = false;
+
+  // has it been destroyed
+  this.destroyed = false;
+
+  // should we decode strings into buffers before passing to _write?
+  // this is here so that some node-core streams can optimize string
+  // handling at a lower level.
+  var noDecode = options.decodeStrings === false;
+  this.decodeStrings = !noDecode;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // not an actual buffer we keep track of, but a measurement
+  // of how much we're waiting to get pushed to some underlying
+  // socket or file.
+  this.length = 0;
+
+  // a flag to see when we're in the middle of a write.
+  this.writing = false;
+
+  // when true all writes will be buffered until .uncork() call
+  this.corked = 0;
+
+  // a flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true;
+
+  // a flag to know if we're processing previously buffered items, which
+  // may call the _write() callback in the same tick, so that we don't
+  // end up in an overlapped onwrite situation.
+  this.bufferProcessing = false;
+
+  // the callback that's passed to _write(chunk,cb)
+  this.onwrite = function (er) {
+    onwrite(stream, er);
+  };
+
+  // the callback that the user supplies to write(chunk,encoding,cb)
+  this.writecb = null;
+
+  // the amount that is being written when _write is called.
+  this.writelen = 0;
+
+  this.bufferedRequest = null;
+  this.lastBufferedRequest = null;
+
+  // number of pending user-supplied write callbacks
+  // this must be 0 before 'finish' can be emitted
+  this.pendingcb = 0;
+
+  // emit prefinish if the only thing we're waiting for is _write cbs
+  // This is relevant for synchronous Transform streams
+  this.prefinished = false;
+
+  // True if the error was already emitted and should not be thrown again
+  this.errorEmitted = false;
+
+  // count buffered requests
+  this.bufferedRequestCount = 0;
+
+  // allocate the first CorkedRequest, there is always
+  // one allocated and free to use, and we maintain at most two
+  this.corkedRequestsFree = new CorkedRequest(this);
+}
+
+WritableState.prototype.getBuffer = function getBuffer() {
+  var current = this.bufferedRequest;
+  var out = [];
+  while (current) {
+    out.push(current);
+    current = current.next;
+  }
+  return out;
+};
+
+(function () {
+  try {
+    Object.defineProperty(WritableState.prototype, 'buffer', {
+      get: internalUtil.deprecate(function () {
+        return this.getBuffer();
+      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')
+    });
+  } catch (_) {}
+})();
+
+// Test _writableState for inheritance to account for Duplex streams,
+// whose prototype chain only points to Readable.
+var realHasInstance;
+if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {
+  realHasInstance = Function.prototype[Symbol.hasInstance];
+  Object.defineProperty(Writable, Symbol.hasInstance, {
+    value: function (object) {
+      if (realHasInstance.call(this, object)) return true;
+      if (this !== Writable) return false;
+
+      return object && object._writableState instanceof WritableState;
+    }
+  });
+} else {
+  realHasInstance = function (object) {
+    return object instanceof this;
+  };
+}
+
+function Writable(options) {
+  Duplex = Duplex || require('./_stream_duplex');
+
+  // Writable ctor is applied to Duplexes, too.
+  // `realHasInstance` is necessary because using plain `instanceof`
+  // would return false, as no `_writableState` property is attached.
+
+  // Trying to use the custom `instanceof` for Writable here will also break the
+  // Node.js LazyTransform implementation, which has a non-trivial getter for
+  // `_writableState` that would lead to infinite recursion.
+  if (!realHasInstance.call(Writable, this) && !(this instanceof Duplex)) {
+    return new Writable(options);
+  }
+
+  this._writableState = new WritableState(options, this);
+
+  // legacy.
+  this.writable = true;
+
+  if (options) {
+    if (typeof options.write === 'function') this._write = options.write;
+
+    if (typeof options.writev === 'function') this._writev = options.writev;
+
+    if (typeof options.destroy === 'function') this._destroy = options.destroy;
+
+    if (typeof options.final === 'function') this._final = options.final;
+  }
+
+  Stream.call(this);
+}
+
+// Otherwise people can pipe Writable streams, which is just wrong.
+Writable.prototype.pipe = function () {
+  this.emit('error', new Error('Cannot pipe, not readable'));
+};
+
+function writeAfterEnd(stream, cb) {
+  var er = new Error('write after end');
+  // TODO: defer error events consistently everywhere, not just the cb
+  stream.emit('error', er);
+  pna.nextTick(cb, er);
+}
+
+// Checks that a user-supplied chunk is valid, especially for the particular
+// mode the stream is in. Currently this means that `null` is never accepted
+// and undefined/non-string values are only allowed in object mode.
+function validChunk(stream, state, chunk, cb) {
+  var valid = true;
+  var er = false;
+
+  if (chunk === null) {
+    er = new TypeError('May not write null values to stream');
+  } else if (typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
+    er = new TypeError('Invalid non-string/buffer chunk');
+  }
+  if (er) {
+    stream.emit('error', er);
+    pna.nextTick(cb, er);
+    valid = false;
+  }
+  return valid;
+}
+
+Writable.prototype.write = function (chunk, encoding, cb) {
+  var state = this._writableState;
+  var ret = false;
+  var isBuf = !state.objectMode && _isUint8Array(chunk);
+
+  if (isBuf && !Buffer.isBuffer(chunk)) {
+    chunk = _uint8ArrayToBuffer(chunk);
+  }
+
+  if (typeof encoding === 'function') {
+    cb = encoding;
+    encoding = null;
+  }
+
+  if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
+
+  if (typeof cb !== 'function') cb = nop;
+
+  if (state.ended) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {
+    state.pendingcb++;
+    ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);
+  }
+
+  return ret;
+};
+
+Writable.prototype.cork = function () {
+  var state = this._writableState;
+
+  state.corked++;
+};
+
+Writable.prototype.uncork = function () {
+  var state = this._writableState;
+
+  if (state.corked) {
+    state.corked--;
+
+    if (!state.writing && !state.corked && !state.finished && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);
+  }
+};
+
+Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
+  // node::ParseEncoding() requires lower case.
+  if (typeof encoding === 'string') encoding = encoding.toLowerCase();
+  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new TypeError('Unknown encoding: ' + encoding);
+  this._writableState.defaultEncoding = encoding;
+  return this;
+};
+
+function decodeChunk(state, chunk, encoding) {
+  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {
+    chunk = Buffer.from(chunk, encoding);
+  }
+  return chunk;
+}
+
+Object.defineProperty(Writable.prototype, 'writableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function () {
+    return this._writableState.highWaterMark;
+  }
+});
+
+// if we're already writing something, then just put this
+// in the queue, and wait our turn.  Otherwise, call _write
+// If we return false, then we need a drain event, so set that flag.
+function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {
+  if (!isBuf) {
+    var newChunk = decodeChunk(state, chunk, encoding);
+    if (chunk !== newChunk) {
+      isBuf = true;
+      encoding = 'buffer';
+      chunk = newChunk;
+    }
+  }
+  var len = state.objectMode ? 1 : chunk.length;
+
+  state.length += len;
+
+  var ret = state.length < state.highWaterMark;
+  // we must ensure that previous needDrain will not be reset to false.
+  if (!ret) state.needDrain = true;
+
+  if (state.writing || state.corked) {
+    var last = state.lastBufferedRequest;
+    state.lastBufferedRequest = {
+      chunk: chunk,
+      encoding: encoding,
+      isBuf: isBuf,
+      callback: cb,
+      next: null
+    };
+    if (last) {
+      last.next = state.lastBufferedRequest;
+    } else {
+      state.bufferedRequest = state.lastBufferedRequest;
+    }
+    state.bufferedRequestCount += 1;
+  } else {
+    doWrite(stream, state, false, len, chunk, encoding, cb);
+  }
+
+  return ret;
+}
+
+function doWrite(stream, state, writev, len, chunk, encoding, cb) {
+  state.writelen = len;
+  state.writecb = cb;
+  state.writing = true;
+  state.sync = true;
+  if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);
+  state.sync = false;
+}
+
+function onwriteError(stream, state, sync, er, cb) {
+  --state.pendingcb;
+
+  if (sync) {
+    // defer the callback if we are being called synchronously
+    // to avoid piling up things on the stack
+    pna.nextTick(cb, er);
+    // this can emit finish, and it will always happen
+    // after error
+    pna.nextTick(finishMaybe, stream, state);
+    stream._writableState.errorEmitted = true;
+    stream.emit('error', er);
+  } else {
+    // the caller expect this to happen before if
+    // it is async
+    cb(er);
+    stream._writableState.errorEmitted = true;
+    stream.emit('error', er);
+    // this can emit finish, but finish must
+    // always follow error
+    finishMaybe(stream, state);
+  }
+}
+
+function onwriteStateUpdate(state) {
+  state.writing = false;
+  state.writecb = null;
+  state.length -= state.writelen;
+  state.writelen = 0;
+}
+
+function onwrite(stream, er) {
+  var state = stream._writableState;
+  var sync = state.sync;
+  var cb = state.writecb;
+
+  onwriteStateUpdate(state);
+
+  if (er) onwriteError(stream, state, sync, er, cb);else {
+    // Check if we're actually ready to finish, but don't emit yet
+    var finished = needFinish(state);
+
+    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
+      clearBuffer(stream, state);
+    }
+
+    if (sync) {
+      /*<replacement>*/
+      asyncWrite(afterWrite, stream, state, finished, cb);
+      /*</replacement>*/
+    } else {
+      afterWrite(stream, state, finished, cb);
+    }
+  }
+}
+
+function afterWrite(stream, state, finished, cb) {
+  if (!finished) onwriteDrain(stream, state);
+  state.pendingcb--;
+  cb();
+  finishMaybe(stream, state);
+}
+
+// Must force callback to be called on nextTick, so that we don't
+// emit 'drain' before the write() consumer gets the 'false' return
+// value, and has a chance to attach a 'drain' listener.
+function onwriteDrain(stream, state) {
+  if (state.length === 0 && state.needDrain) {
+    state.needDrain = false;
+    stream.emit('drain');
+  }
+}
+
+// if there's something in the buffer waiting, then process it
+function clearBuffer(stream, state) {
+  state.bufferProcessing = true;
+  var entry = state.bufferedRequest;
+
+  if (stream._writev && entry && entry.next) {
+    // Fast case, write everything using _writev()
+    var l = state.bufferedRequestCount;
+    var buffer = new Array(l);
+    var holder = state.corkedRequestsFree;
+    holder.entry = entry;
+
+    var count = 0;
+    var allBuffers = true;
+    while (entry) {
+      buffer[count] = entry;
+      if (!entry.isBuf) allBuffers = false;
+      entry = entry.next;
+      count += 1;
+    }
+    buffer.allBuffers = allBuffers;
+
+    doWrite(stream, state, true, state.length, buffer, '', holder.finish);
+
+    // doWrite is almost always async, defer these to save a bit of time
+    // as the hot path ends with doWrite
+    state.pendingcb++;
+    state.lastBufferedRequest = null;
+    if (holder.next) {
+      state.corkedRequestsFree = holder.next;
+      holder.next = null;
+    } else {
+      state.corkedRequestsFree = new CorkedRequest(state);
+    }
+    state.bufferedRequestCount = 0;
+  } else {
+    // Slow case, write chunks one-by-one
+    while (entry) {
+      var chunk = entry.chunk;
+      var encoding = entry.encoding;
+      var cb = entry.callback;
+      var len = state.objectMode ? 1 : chunk.length;
+
+      doWrite(stream, state, false, len, chunk, encoding, cb);
+      entry = entry.next;
+      state.bufferedRequestCount--;
+      // if we didn't call the onwrite immediately, then
+      // it means that we need to wait until it does.
+      // also, that means that the chunk and cb are currently
+      // being processed, so move the buffer counter past them.
+      if (state.writing) {
+        break;
+      }
+    }
+
+    if (entry === null) state.lastBufferedRequest = null;
+  }
+
+  state.bufferedRequest = entry;
+  state.bufferProcessing = false;
+}
+
+Writable.prototype._write = function (chunk, encoding, cb) {
+  cb(new Error('_write() is not implemented'));
+};
+
+Writable.prototype._writev = null;
+
+Writable.prototype.end = function (chunk, encoding, cb) {
+  var state = this._writableState;
+
+  if (typeof chunk === 'function') {
+    cb = chunk;
+    chunk = null;
+    encoding = null;
+  } else if (typeof encoding === 'function') {
+    cb = encoding;
+    encoding = null;
+  }
+
+  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding);
+
+  // .end() fully uncorks
+  if (state.corked) {
+    state.corked = 1;
+    this.uncork();
+  }
+
+  // ignore unnecessary end() calls.
+  if (!state.ending && !state.finished) endWritable(this, state, cb);
+};
+
+function needFinish(state) {
+  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
+}
+function callFinal(stream, state) {
+  stream._final(function (err) {
+    state.pendingcb--;
+    if (err) {
+      stream.emit('error', err);
+    }
+    state.prefinished = true;
+    stream.emit('prefinish');
+    finishMaybe(stream, state);
+  });
+}
+function prefinish(stream, state) {
+  if (!state.prefinished && !state.finalCalled) {
+    if (typeof stream._final === 'function') {
+      state.pendingcb++;
+      state.finalCalled = true;
+      pna.nextTick(callFinal, stream, state);
+    } else {
+      state.prefinished = true;
+      stream.emit('prefinish');
+    }
+  }
+}
+
+function finishMaybe(stream, state) {
+  var need = needFinish(state);
+  if (need) {
+    prefinish(stream, state);
+    if (state.pendingcb === 0) {
+      state.finished = true;
+      stream.emit('finish');
+    }
+  }
+  return need;
+}
+
+function endWritable(stream, state, cb) {
+  state.ending = true;
+  finishMaybe(stream, state);
+  if (cb) {
+    if (state.finished) pna.nextTick(cb);else stream.once('finish', cb);
+  }
+  state.ended = true;
+  stream.writable = false;
+}
+
+function onCorkedFinish(corkReq, state, err) {
+  var entry = corkReq.entry;
+  corkReq.entry = null;
+  while (entry) {
+    var cb = entry.callback;
+    state.pendingcb--;
+    cb(err);
+    entry = entry.next;
+  }
+  if (state.corkedRequestsFree) {
+    state.corkedRequestsFree.next = corkReq;
+  } else {
+    state.corkedRequestsFree = corkReq;
+  }
+}
+
+Object.defineProperty(Writable.prototype, 'destroyed', {
+  get: function () {
+    if (this._writableState === undefined) {
+      return false;
+    }
+    return this._writableState.destroyed;
+  },
+  set: function (value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (!this._writableState) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._writableState.destroyed = value;
+  }
+});
+
+Writable.prototype.destroy = destroyImpl.destroy;
+Writable.prototype._undestroy = destroyImpl.undestroy;
+Writable.prototype._destroy = function (err, cb) {
+  this.end();
+  cb(err);
+};
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./_stream_duplex":70,"./internal/streams/destroy":76,"./internal/streams/stream":77,"_process":68,"core-util-is":44,"inherits":56,"process-nextick-args":67,"safe-buffer":82,"util-deprecate":85}],75:[function(require,module,exports){
+'use strict';
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+var Buffer = require('safe-buffer').Buffer;
+var util = require('util');
+
+function copyBuffer(src, target, offset) {
+  src.copy(target, offset);
+}
+
+module.exports = function () {
+  function BufferList() {
+    _classCallCheck(this, BufferList);
+
+    this.head = null;
+    this.tail = null;
+    this.length = 0;
+  }
+
+  BufferList.prototype.push = function push(v) {
+    var entry = { data: v, next: null };
+    if (this.length > 0) this.tail.next = entry;else this.head = entry;
+    this.tail = entry;
+    ++this.length;
+  };
+
+  BufferList.prototype.unshift = function unshift(v) {
+    var entry = { data: v, next: this.head };
+    if (this.length === 0) this.tail = entry;
+    this.head = entry;
+    ++this.length;
+  };
+
+  BufferList.prototype.shift = function shift() {
+    if (this.length === 0) return;
+    var ret = this.head.data;
+    if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
+    --this.length;
+    return ret;
+  };
+
+  BufferList.prototype.clear = function clear() {
+    this.head = this.tail = null;
+    this.length = 0;
+  };
+
+  BufferList.prototype.join = function join(s) {
+    if (this.length === 0) return '';
+    var p = this.head;
+    var ret = '' + p.data;
+    while (p = p.next) {
+      ret += s + p.data;
+    }return ret;
+  };
+
+  BufferList.prototype.concat = function concat(n) {
+    if (this.length === 0) return Buffer.alloc(0);
+    if (this.length === 1) return this.head.data;
+    var ret = Buffer.allocUnsafe(n >>> 0);
+    var p = this.head;
+    var i = 0;
+    while (p) {
+      copyBuffer(p.data, ret, i);
+      i += p.data.length;
+      p = p.next;
+    }
+    return ret;
+  };
+
+  return BufferList;
+}();
+
+if (util && util.inspect && util.inspect.custom) {
+  module.exports.prototype[util.inspect.custom] = function () {
+    var obj = util.inspect({ length: this.length });
+    return this.constructor.name + ' ' + obj;
+  };
+}
+},{"safe-buffer":82,"util":40}],76:[function(require,module,exports){
+'use strict';
+
+/*<replacement>*/
+
+var pna = require('process-nextick-args');
+/*</replacement>*/
+
+// undocumented cb() API, needed for core, not for public API
+function destroy(err, cb) {
+  var _this = this;
+
+  var readableDestroyed = this._readableState && this._readableState.destroyed;
+  var writableDestroyed = this._writableState && this._writableState.destroyed;
+
+  if (readableDestroyed || writableDestroyed) {
+    if (cb) {
+      cb(err);
+    } else if (err && (!this._writableState || !this._writableState.errorEmitted)) {
+      pna.nextTick(emitErrorNT, this, err);
+    }
+    return this;
+  }
+
+  // we set destroyed to true before firing error callbacks in order
+  // to make it re-entrance safe in case destroy() is called within callbacks
+
+  if (this._readableState) {
+    this._readableState.destroyed = true;
+  }
+
+  // if this is a duplex stream mark the writable part as destroyed as well
+  if (this._writableState) {
+    this._writableState.destroyed = true;
+  }
+
+  this._destroy(err || null, function (err) {
+    if (!cb && err) {
+      pna.nextTick(emitErrorNT, _this, err);
+      if (_this._writableState) {
+        _this._writableState.errorEmitted = true;
+      }
+    } else if (cb) {
+      cb(err);
+    }
+  });
+
+  return this;
+}
+
+function undestroy() {
+  if (this._readableState) {
+    this._readableState.destroyed = false;
+    this._readableState.reading = false;
+    this._readableState.ended = false;
+    this._readableState.endEmitted = false;
+  }
+
+  if (this._writableState) {
+    this._writableState.destroyed = false;
+    this._writableState.ended = false;
+    this._writableState.ending = false;
+    this._writableState.finished = false;
+    this._writableState.errorEmitted = false;
+  }
+}
+
+function emitErrorNT(self, err) {
+  self.emit('error', err);
+}
+
+module.exports = {
+  destroy: destroy,
+  undestroy: undestroy
+};
+},{"process-nextick-args":67}],77:[function(require,module,exports){
+module.exports = require('events').EventEmitter;
+
+},{"events":50}],78:[function(require,module,exports){
+module.exports = require('./readable').PassThrough
+
+},{"./readable":79}],79:[function(require,module,exports){
+exports = module.exports = require('./lib/_stream_readable.js');
+exports.Stream = exports;
+exports.Readable = exports;
+exports.Writable = require('./lib/_stream_writable.js');
+exports.Duplex = require('./lib/_stream_duplex.js');
+exports.Transform = require('./lib/_stream_transform.js');
+exports.PassThrough = require('./lib/_stream_passthrough.js');
+
+},{"./lib/_stream_duplex.js":70,"./lib/_stream_passthrough.js":71,"./lib/_stream_readable.js":72,"./lib/_stream_transform.js":73,"./lib/_stream_writable.js":74}],80:[function(require,module,exports){
+module.exports = require('./readable').Transform
+
+},{"./readable":79}],81:[function(require,module,exports){
+module.exports = require('./lib/_stream_writable.js');
+
+},{"./lib/_stream_writable.js":74}],82:[function(require,module,exports){
+/* eslint-disable node/no-deprecated-api */
+var buffer = require('buffer')
+var Buffer = buffer.Buffer
+
+// alternative to using Object.keys for old browsers
+function copyProps (src, dst) {
+  for (var key in src) {
+    dst[key] = src[key]
+  }
+}
+if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
+  module.exports = buffer
+} else {
+  // Copy properties from require('buffer')
+  copyProps(buffer, exports)
+  exports.Buffer = SafeBuffer
+}
+
+function SafeBuffer (arg, encodingOrOffset, length) {
+  return Buffer(arg, encodingOrOffset, length)
+}
+
+// Copy static methods from Buffer
+copyProps(Buffer, SafeBuffer)
+
+SafeBuffer.from = function (arg, encodingOrOffset, length) {
+  if (typeof arg === 'number') {
+    throw new TypeError('Argument must not be a number')
+  }
+  return Buffer(arg, encodingOrOffset, length)
+}
+
+SafeBuffer.alloc = function (size, fill, encoding) {
+  if (typeof size !== 'number') {
+    throw new TypeError('Argument must be a number')
+  }
+  var buf = Buffer(size)
+  if (fill !== undefined) {
+    if (typeof encoding === 'string') {
+      buf.fill(fill, encoding)
+    } else {
+      buf.fill(fill)
+    }
+  } else {
+    buf.fill(0)
+  }
+  return buf
+}
+
+SafeBuffer.allocUnsafe = function (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('Argument must be a number')
+  }
+  return Buffer(size)
+}
+
+SafeBuffer.allocUnsafeSlow = function (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('Argument must be a number')
+  }
+  return buffer.SlowBuffer(size)
+}
+
+},{"buffer":43}],83:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+module.exports = Stream;
+
+var EE = require('events').EventEmitter;
+var inherits = require('inherits');
+
+inherits(Stream, EE);
+Stream.Readable = require('readable-stream/readable.js');
+Stream.Writable = require('readable-stream/writable.js');
+Stream.Duplex = require('readable-stream/duplex.js');
+Stream.Transform = require('readable-stream/transform.js');
+Stream.PassThrough = require('readable-stream/passthrough.js');
+
+// Backwards-compat with node 0.4.x
+Stream.Stream = Stream;
+
+
+
+// old-style streams.  Note that the pipe method (the only relevant
+// part of this class) is overridden in the Readable class.
+
+function Stream() {
+  EE.call(this);
+}
+
+Stream.prototype.pipe = function(dest, options) {
+  var source = this;
+
+  function ondata(chunk) {
+    if (dest.writable) {
+      if (false === dest.write(chunk) && source.pause) {
+        source.pause();
+      }
+    }
+  }
+
+  source.on('data', ondata);
+
+  function ondrain() {
+    if (source.readable && source.resume) {
+      source.resume();
+    }
+  }
+
+  dest.on('drain', ondrain);
+
+  // If the 'end' option is not supplied, dest.end() will be called when
+  // source gets the 'end' or 'close' events.  Only dest.end() once.
+  if (!dest._isStdio && (!options || options.end !== false)) {
+    source.on('end', onend);
+    source.on('close', onclose);
+  }
+
+  var didOnEnd = false;
+  function onend() {
+    if (didOnEnd) return;
+    didOnEnd = true;
+
+    dest.end();
+  }
+
+
+  function onclose() {
+    if (didOnEnd) return;
+    didOnEnd = true;
+
+    if (typeof dest.destroy === 'function') dest.destroy();
+  }
+
+  // don't leave dangling pipes when there are errors.
+  function onerror(er) {
+    cleanup();
+    if (EE.listenerCount(this, 'error') === 0) {
+      throw er; // Unhandled stream error in pipe.
+    }
+  }
+
+  source.on('error', onerror);
+  dest.on('error', onerror);
+
+  // remove all the event listeners that were added.
+  function cleanup() {
+    source.removeListener('data', ondata);
+    dest.removeListener('drain', ondrain);
+
+    source.removeListener('end', onend);
+    source.removeListener('close', onclose);
+
+    source.removeListener('error', onerror);
+    dest.removeListener('error', onerror);
+
+    source.removeListener('end', cleanup);
+    source.removeListener('close', cleanup);
+
+    dest.removeListener('close', cleanup);
+  }
+
+  source.on('end', cleanup);
+  source.on('close', cleanup);
+
+  dest.on('close', cleanup);
+
+  dest.emit('pipe', source);
+
+  // Allow for unix-like usage: A.pipe(B).pipe(C)
+  return dest;
+};
+
+},{"events":50,"inherits":56,"readable-stream/duplex.js":69,"readable-stream/passthrough.js":78,"readable-stream/readable.js":79,"readable-stream/transform.js":80,"readable-stream/writable.js":81}],84:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+
+/*<replacement>*/
+
+var Buffer = require('safe-buffer').Buffer;
+/*</replacement>*/
+
+var isEncoding = Buffer.isEncoding || function (encoding) {
+  encoding = '' + encoding;
+  switch (encoding && encoding.toLowerCase()) {
+    case 'hex':case 'utf8':case 'utf-8':case 'ascii':case 'binary':case 'base64':case 'ucs2':case 'ucs-2':case 'utf16le':case 'utf-16le':case 'raw':
+      return true;
+    default:
+      return false;
+  }
+};
+
+function _normalizeEncoding(enc) {
+  if (!enc) return 'utf8';
+  var retried;
+  while (true) {
+    switch (enc) {
+      case 'utf8':
+      case 'utf-8':
+        return 'utf8';
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return 'utf16le';
+      case 'latin1':
+      case 'binary':
+        return 'latin1';
+      case 'base64':
+      case 'ascii':
+      case 'hex':
+        return enc;
+      default:
+        if (retried) return; // undefined
+        enc = ('' + enc).toLowerCase();
+        retried = true;
+    }
+  }
+};
+
+// Do not cache `Buffer.isEncoding` when checking encoding names as some
+// modules monkey-patch it to support additional encodings
+function normalizeEncoding(enc) {
+  var nenc = _normalizeEncoding(enc);
+  if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc);
+  return nenc || enc;
+}
+
+// StringDecoder provides an interface for efficiently splitting a series of
+// buffers into a series of JS strings without breaking apart multi-byte
+// characters.
+exports.StringDecoder = StringDecoder;
+function StringDecoder(encoding) {
+  this.encoding = normalizeEncoding(encoding);
+  var nb;
+  switch (this.encoding) {
+    case 'utf16le':
+      this.text = utf16Text;
+      this.end = utf16End;
+      nb = 4;
+      break;
+    case 'utf8':
+      this.fillLast = utf8FillLast;
+      nb = 4;
+      break;
+    case 'base64':
+      this.text = base64Text;
+      this.end = base64End;
+      nb = 3;
+      break;
+    default:
+      this.write = simpleWrite;
+      this.end = simpleEnd;
+      return;
+  }
+  this.lastNeed = 0;
+  this.lastTotal = 0;
+  this.lastChar = Buffer.allocUnsafe(nb);
+}
+
+StringDecoder.prototype.write = function (buf) {
+  if (buf.length === 0) return '';
+  var r;
+  var i;
+  if (this.lastNeed) {
+    r = this.fillLast(buf);
+    if (r === undefined) return '';
+    i = this.lastNeed;
+    this.lastNeed = 0;
+  } else {
+    i = 0;
+  }
+  if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);
+  return r || '';
+};
+
+StringDecoder.prototype.end = utf8End;
+
+// Returns only complete characters in a Buffer
+StringDecoder.prototype.text = utf8Text;
+
+// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer
+StringDecoder.prototype.fillLast = function (buf) {
+  if (this.lastNeed <= buf.length) {
+    buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);
+    return this.lastChar.toString(this.encoding, 0, this.lastTotal);
+  }
+  buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);
+  this.lastNeed -= buf.length;
+};
+
+// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a
+// continuation byte. If an invalid byte is detected, -2 is returned.
+function utf8CheckByte(byte) {
+  if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4;
+  return byte >> 6 === 0x02 ? -1 : -2;
+}
+
+// Checks at most 3 bytes at the end of a Buffer in order to detect an
+// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4)
+// needed to complete the UTF-8 character (if applicable) are returned.
+function utf8CheckIncomplete(self, buf, i) {
+  var j = buf.length - 1;
+  if (j < i) return 0;
+  var nb = utf8CheckByte(buf[j]);
+  if (nb >= 0) {
+    if (nb > 0) self.lastNeed = nb - 1;
+    return nb;
+  }
+  if (--j < i || nb === -2) return 0;
+  nb = utf8CheckByte(buf[j]);
+  if (nb >= 0) {
+    if (nb > 0) self.lastNeed = nb - 2;
+    return nb;
+  }
+  if (--j < i || nb === -2) return 0;
+  nb = utf8CheckByte(buf[j]);
+  if (nb >= 0) {
+    if (nb > 0) {
+      if (nb === 2) nb = 0;else self.lastNeed = nb - 3;
+    }
+    return nb;
+  }
+  return 0;
+}
+
+// Validates as many continuation bytes for a multi-byte UTF-8 character as
+// needed or are available. If we see a non-continuation byte where we expect
+// one, we "replace" the validated continuation bytes we've seen so far with
+// a single UTF-8 replacement character ('\ufffd'), to match v8's UTF-8 decoding
+// behavior. The continuation byte check is included three times in the case
+// where all of the continuation bytes for a character exist in the same buffer.
+// It is also done this way as a slight performance increase instead of using a
+// loop.
+function utf8CheckExtraBytes(self, buf, p) {
+  if ((buf[0] & 0xC0) !== 0x80) {
+    self.lastNeed = 0;
+    return '\ufffd';
+  }
+  if (self.lastNeed > 1 && buf.length > 1) {
+    if ((buf[1] & 0xC0) !== 0x80) {
+      self.lastNeed = 1;
+      return '\ufffd';
+    }
+    if (self.lastNeed > 2 && buf.length > 2) {
+      if ((buf[2] & 0xC0) !== 0x80) {
+        self.lastNeed = 2;
+        return '\ufffd';
+      }
+    }
+  }
+}
+
+// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer.
+function utf8FillLast(buf) {
+  var p = this.lastTotal - this.lastNeed;
+  var r = utf8CheckExtraBytes(this, buf, p);
+  if (r !== undefined) return r;
+  if (this.lastNeed <= buf.length) {
+    buf.copy(this.lastChar, p, 0, this.lastNeed);
+    return this.lastChar.toString(this.encoding, 0, this.lastTotal);
+  }
+  buf.copy(this.lastChar, p, 0, buf.length);
+  this.lastNeed -= buf.length;
+}
+
+// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a
+// partial character, the character's bytes are buffered until the required
+// number of bytes are available.
+function utf8Text(buf, i) {
+  var total = utf8CheckIncomplete(this, buf, i);
+  if (!this.lastNeed) return buf.toString('utf8', i);
+  this.lastTotal = total;
+  var end = buf.length - (total - this.lastNeed);
+  buf.copy(this.lastChar, 0, end);
+  return buf.toString('utf8', i, end);
+}
+
+// For UTF-8, a replacement character is added when ending on a partial
+// character.
+function utf8End(buf) {
+  var r = buf && buf.length ? this.write(buf) : '';
+  if (this.lastNeed) return r + '\ufffd';
+  return r;
+}
+
+// UTF-16LE typically needs two bytes per character, but even if we have an even
+// number of bytes available, we need to check if we end on a leading/high
+// surrogate. In that case, we need to wait for the next two bytes in order to
+// decode the last character properly.
+function utf16Text(buf, i) {
+  if ((buf.length - i) % 2 === 0) {
+    var r = buf.toString('utf16le', i);
+    if (r) {
+      var c = r.charCodeAt(r.length - 1);
+      if (c >= 0xD800 && c <= 0xDBFF) {
+        this.lastNeed = 2;
+        this.lastTotal = 4;
+        this.lastChar[0] = buf[buf.length - 2];
+        this.lastChar[1] = buf[buf.length - 1];
+        return r.slice(0, -1);
+      }
+    }
+    return r;
+  }
+  this.lastNeed = 1;
+  this.lastTotal = 2;
+  this.lastChar[0] = buf[buf.length - 1];
+  return buf.toString('utf16le', i, buf.length - 1);
+}
+
+// For UTF-16LE we do not explicitly append special replacement characters if we
+// end on a partial character, we simply let v8 handle that.
+function utf16End(buf) {
+  var r = buf && buf.length ? this.write(buf) : '';
+  if (this.lastNeed) {
+    var end = this.lastTotal - this.lastNeed;
+    return r + this.lastChar.toString('utf16le', 0, end);
+  }
+  return r;
+}
+
+function base64Text(buf, i) {
+  var n = (buf.length - i) % 3;
+  if (n === 0) return buf.toString('base64', i);
+  this.lastNeed = 3 - n;
+  this.lastTotal = 3;
+  if (n === 1) {
+    this.lastChar[0] = buf[buf.length - 1];
+  } else {
+    this.lastChar[0] = buf[buf.length - 2];
+    this.lastChar[1] = buf[buf.length - 1];
+  }
+  return buf.toString('base64', i, buf.length - n);
+}
+
+function base64End(buf) {
+  var r = buf && buf.length ? this.write(buf) : '';
+  if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed);
+  return r;
+}
+
+// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex)
+function simpleWrite(buf) {
+  return buf.toString(this.encoding);
+}
+
+function simpleEnd(buf) {
+  return buf && buf.length ? this.write(buf) : '';
+}
+},{"safe-buffer":82}],85:[function(require,module,exports){
+(function (global){
+
+/**
+ * Module exports.
+ */
+
+module.exports = deprecate;
+
+/**
+ * Mark that a method should not be used.
+ * Returns a modified function which warns once by default.
+ *
+ * If `localStorage.noDeprecation = true` is set, then it is a no-op.
+ *
+ * If `localStorage.throwDeprecation = true` is set, then deprecated functions
+ * will throw an Error when invoked.
+ *
+ * If `localStorage.traceDeprecation = true` is set, then deprecated functions
+ * will invoke `console.trace()` instead of `console.error()`.
+ *
+ * @param {Function} fn - the function to deprecate
+ * @param {String} msg - the string to print to the console when `fn` is invoked
+ * @returns {Function} a new "deprecated" version of `fn`
+ * @api public
+ */
+
+function deprecate (fn, msg) {
+  if (config('noDeprecation')) {
+    return fn;
+  }
+
+  var warned = false;
+  function deprecated() {
+    if (!warned) {
+      if (config('throwDeprecation')) {
+        throw new Error(msg);
+      } else if (config('traceDeprecation')) {
+        console.trace(msg);
+      } else {
+        console.warn(msg);
+      }
+      warned = true;
+    }
+    return fn.apply(this, arguments);
+  }
+
+  return deprecated;
+}
+
+/**
+ * Checks `localStorage` for boolean values for the given `name`.
+ *
+ * @param {String} name
+ * @returns {Boolean}
+ * @api private
+ */
+
+function config (name) {
+  // accessing global.localStorage can trigger a DOMException in sandboxed iframes
+  try {
+    if (!global.localStorage) return false;
+  } catch (_) {
+    return false;
+  }
+  var val = global.localStorage[name];
+  if (null == val) return false;
+  return String(val).toLowerCase() === 'true';
+}
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{}],86:[function(require,module,exports){
+arguments[4][56][0].apply(exports,arguments)
+},{"dup":56}],87:[function(require,module,exports){
+module.exports = function isBuffer(arg) {
+  return arg && typeof arg === 'object'
+    && typeof arg.copy === 'function'
+    && typeof arg.fill === 'function'
+    && typeof arg.readUInt8 === 'function';
+}
+},{}],88:[function(require,module,exports){
+(function (process,global){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var formatRegExp = /%[sdj%]/g;
+exports.format = function(f) {
+  if (!isString(f)) {
+    var objects = [];
+    for (var i = 0; i < arguments.length; i++) {
+      objects.push(inspect(arguments[i]));
+    }
+    return objects.join(' ');
+  }
+
+  var i = 1;
+  var args = arguments;
+  var len = args.length;
+  var str = String(f).replace(formatRegExp, function(x) {
+    if (x === '%%') return '%';
+    if (i >= len) return x;
+    switch (x) {
+      case '%s': return String(args[i++]);
+      case '%d': return Number(args[i++]);
+      case '%j':
+        try {
+          return JSON.stringify(args[i++]);
+        } catch (_) {
+          return '[Circular]';
+        }
+      default:
+        return x;
+    }
+  });
+  for (var x = args[i]; i < len; x = args[++i]) {
+    if (isNull(x) || !isObject(x)) {
+      str += ' ' + x;
+    } else {
+      str += ' ' + inspect(x);
+    }
+  }
+  return str;
+};
+
+
+// Mark that a method should not be used.
+// Returns a modified function which warns once by default.
+// If --no-deprecation is set, then it is a no-op.
+exports.deprecate = function(fn, msg) {
+  // Allow for deprecating things in the process of starting up.
+  if (isUndefined(global.process)) {
+    return function() {
+      return exports.deprecate(fn, msg).apply(this, arguments);
+    };
+  }
+
+  if (process.noDeprecation === true) {
+    return fn;
+  }
+
+  var warned = false;
+  function deprecated() {
+    if (!warned) {
+      if (process.throwDeprecation) {
+        throw new Error(msg);
+      } else if (process.traceDeprecation) {
+        console.trace(msg);
+      } else {
+        console.error(msg);
+      }
+      warned = true;
+    }
+    return fn.apply(this, arguments);
+  }
+
+  return deprecated;
+};
+
+
+var debugs = {};
+var debugEnviron;
+exports.debuglog = function(set) {
+  if (isUndefined(debugEnviron))
+    debugEnviron = process.env.NODE_DEBUG || '';
+  set = set.toUpperCase();
+  if (!debugs[set]) {
+    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
+      var pid = process.pid;
+      debugs[set] = function() {
+        var msg = exports.format.apply(exports, arguments);
+        console.error('%s %d: %s', set, pid, msg);
+      };
+    } else {
+      debugs[set] = function() {};
+    }
+  }
+  return debugs[set];
+};
+
+
+/**
+ * Echos the value of a value. Trys to print the value out
+ * in the best way possible given the different types.
+ *
+ * @param {Object} obj The object to print out.
+ * @param {Object} opts Optional options object that alters the output.
+ */
+/* legacy: obj, showHidden, depth, colors*/
+function inspect(obj, opts) {
+  // default options
+  var ctx = {
+    seen: [],
+    stylize: stylizeNoColor
+  };
+  // legacy...
+  if (arguments.length >= 3) ctx.depth = arguments[2];
+  if (arguments.length >= 4) ctx.colors = arguments[3];
+  if (isBoolean(opts)) {
+    // legacy...
+    ctx.showHidden = opts;
+  } else if (opts) {
+    // got an "options" object
+    exports._extend(ctx, opts);
+  }
+  // set default options
+  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
+  if (isUndefined(ctx.depth)) ctx.depth = 2;
+  if (isUndefined(ctx.colors)) ctx.colors = false;
+  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
+  if (ctx.colors) ctx.stylize = stylizeWithColor;
+  return formatValue(ctx, obj, ctx.depth);
+}
+exports.inspect = inspect;
+
+
+// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
+inspect.colors = {
+  'bold' : [1, 22],
+  'italic' : [3, 23],
+  'underline' : [4, 24],
+  'inverse' : [7, 27],
+  'white' : [37, 39],
+  'grey' : [90, 39],
+  'black' : [30, 39],
+  'blue' : [34, 39],
+  'cyan' : [36, 39],
+  'green' : [32, 39],
+  'magenta' : [35, 39],
+  'red' : [31, 39],
+  'yellow' : [33, 39]
+};
+
+// Don't use 'blue' not visible on cmd.exe
+inspect.styles = {
+  'special': 'cyan',
+  'number': 'yellow',
+  'boolean': 'yellow',
+  'undefined': 'grey',
+  'null': 'bold',
+  'string': 'green',
+  'date': 'magenta',
+  // "name": intentionally not styling
+  'regexp': 'red'
+};
+
+
+function stylizeWithColor(str, styleType) {
+  var style = inspect.styles[styleType];
+
+  if (style) {
+    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
+           '\u001b[' + inspect.colors[style][1] + 'm';
+  } else {
+    return str;
+  }
+}
+
+
+function stylizeNoColor(str, styleType) {
+  return str;
+}
+
+
+function arrayToHash(array) {
+  var hash = {};
+
+  array.forEach(function(val, idx) {
+    hash[val] = true;
+  });
+
+  return hash;
+}
+
+
+function formatValue(ctx, value, recurseTimes) {
+  // Provide a hook for user-specified inspect functions.
+  // Check that value is an object with an inspect function on it
+  if (ctx.customInspect &&
+      value &&
+      isFunction(value.inspect) &&
+      // Filter out the util module, it's inspect function is special
+      value.inspect !== exports.inspect &&
+      // Also filter out any prototype objects using the circular check.
+      !(value.constructor && value.constructor.prototype === value)) {
+    var ret = value.inspect(recurseTimes, ctx);
+    if (!isString(ret)) {
+      ret = formatValue(ctx, ret, recurseTimes);
+    }
+    return ret;
+  }
+
+  // Primitive types cannot have properties
+  var primitive = formatPrimitive(ctx, value);
+  if (primitive) {
+    return primitive;
+  }
+
+  // Look up the keys of the object.
+  var keys = Object.keys(value);
+  var visibleKeys = arrayToHash(keys);
+
+  if (ctx.showHidden) {
+    keys = Object.getOwnPropertyNames(value);
+  }
+
+  // IE doesn't make error fields non-enumerable
+  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
+  if (isError(value)
+      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
+    return formatError(value);
+  }
+
+  // Some type of object without properties can be shortcutted.
+  if (keys.length === 0) {
+    if (isFunction(value)) {
+      var name = value.name ? ': ' + value.name : '';
+      return ctx.stylize('[Function' + name + ']', 'special');
+    }
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    }
+    if (isDate(value)) {
+      return ctx.stylize(Date.prototype.toString.call(value), 'date');
+    }
+    if (isError(value)) {
+      return formatError(value);
+    }
+  }
+
+  var base = '', array = false, braces = ['{', '}'];
+
+  // Make Array say that they are Array
+  if (isArray(value)) {
+    array = true;
+    braces = ['[', ']'];
+  }
+
+  // Make functions say that they are functions
+  if (isFunction(value)) {
+    var n = value.name ? ': ' + value.name : '';
+    base = ' [Function' + n + ']';
+  }
+
+  // Make RegExps say that they are RegExps
+  if (isRegExp(value)) {
+    base = ' ' + RegExp.prototype.toString.call(value);
+  }
+
+  // Make dates with properties first say the date
+  if (isDate(value)) {
+    base = ' ' + Date.prototype.toUTCString.call(value);
+  }
+
+  // Make error with message first say the error
+  if (isError(value)) {
+    base = ' ' + formatError(value);
+  }
+
+  if (keys.length === 0 && (!array || value.length == 0)) {
+    return braces[0] + base + braces[1];
+  }
+
+  if (recurseTimes < 0) {
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    } else {
+      return ctx.stylize('[Object]', 'special');
+    }
+  }
+
+  ctx.seen.push(value);
+
+  var output;
+  if (array) {
+    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
+  } else {
+    output = keys.map(function(key) {
+      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
+    });
+  }
+
+  ctx.seen.pop();
+
+  return reduceToSingleString(output, base, braces);
+}
+
+
+function formatPrimitive(ctx, value) {
+  if (isUndefined(value))
+    return ctx.stylize('undefined', 'undefined');
+  if (isString(value)) {
+    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
+                                             .replace(/'/g, "\\'")
+                                             .replace(/\\"/g, '"') + '\'';
+    return ctx.stylize(simple, 'string');
+  }
+  if (isNumber(value))
+    return ctx.stylize('' + value, 'number');
+  if (isBoolean(value))
+    return ctx.stylize('' + value, 'boolean');
+  // For some reason typeof null is "object", so special case here.
+  if (isNull(value))
+    return ctx.stylize('null', 'null');
+}
+
+
+function formatError(value) {
+  return '[' + Error.prototype.toString.call(value) + ']';
+}
+
+
+function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
+  var output = [];
+  for (var i = 0, l = value.length; i < l; ++i) {
+    if (hasOwnProperty(value, String(i))) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          String(i), true));
+    } else {
+      output.push('');
+    }
+  }
+  keys.forEach(function(key) {
+    if (!key.match(/^\d+$/)) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          key, true));
+    }
+  });
+  return output;
+}
+
+
+function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
+  var name, str, desc;
+  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
+  if (desc.get) {
+    if (desc.set) {
+      str = ctx.stylize('[Getter/Setter]', 'special');
+    } else {
+      str = ctx.stylize('[Getter]', 'special');
+    }
+  } else {
+    if (desc.set) {
+      str = ctx.stylize('[Setter]', 'special');
+    }
+  }
+  if (!hasOwnProperty(visibleKeys, key)) {
+    name = '[' + key + ']';
+  }
+  if (!str) {
+    if (ctx.seen.indexOf(desc.value) < 0) {
+      if (isNull(recurseTimes)) {
+        str = formatValue(ctx, desc.value, null);
+      } else {
+        str = formatValue(ctx, desc.value, recurseTimes - 1);
+      }
+      if (str.indexOf('\n') > -1) {
+        if (array) {
+          str = str.split('\n').map(function(line) {
+            return '  ' + line;
+          }).join('\n').substr(2);
+        } else {
+          str = '\n' + str.split('\n').map(function(line) {
+            return '   ' + line;
+          }).join('\n');
+        }
+      }
+    } else {
+      str = ctx.stylize('[Circular]', 'special');
+    }
+  }
+  if (isUndefined(name)) {
+    if (array && key.match(/^\d+$/)) {
+      return str;
+    }
+    name = JSON.stringify('' + key);
+    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
+      name = name.substr(1, name.length - 2);
+      name = ctx.stylize(name, 'name');
+    } else {
+      name = name.replace(/'/g, "\\'")
+                 .replace(/\\"/g, '"')
+                 .replace(/(^"|"$)/g, "'");
+      name = ctx.stylize(name, 'string');
+    }
+  }
+
+  return name + ': ' + str;
+}
+
+
+function reduceToSingleString(output, base, braces) {
+  var numLinesEst = 0;
+  var length = output.reduce(function(prev, cur) {
+    numLinesEst++;
+    if (cur.indexOf('\n') >= 0) numLinesEst++;
+    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
+  }, 0);
+
+  if (length > 60) {
+    return braces[0] +
+           (base === '' ? '' : base + '\n ') +
+           ' ' +
+           output.join(',\n  ') +
+           ' ' +
+           braces[1];
+  }
+
+  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
+}
+
+
+// NOTE: These type checking functions intentionally don't use `instanceof`
+// because it is fragile and can be easily faked with `Object.create()`.
+function isArray(ar) {
+  return Array.isArray(ar);
+}
+exports.isArray = isArray;
+
+function isBoolean(arg) {
+  return typeof arg === 'boolean';
+}
+exports.isBoolean = isBoolean;
+
+function isNull(arg) {
+  return arg === null;
+}
+exports.isNull = isNull;
+
+function isNullOrUndefined(arg) {
+  return arg == null;
+}
+exports.isNullOrUndefined = isNullOrUndefined;
+
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+exports.isNumber = isNumber;
+
+function isString(arg) {
+  return typeof arg === 'string';
+}
+exports.isString = isString;
+
+function isSymbol(arg) {
+  return typeof arg === 'symbol';
+}
+exports.isSymbol = isSymbol;
+
+function isUndefined(arg) {
+  return arg === void 0;
+}
+exports.isUndefined = isUndefined;
+
+function isRegExp(re) {
+  return isObject(re) && objectToString(re) === '[object RegExp]';
+}
+exports.isRegExp = isRegExp;
+
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
+}
+exports.isObject = isObject;
+
+function isDate(d) {
+  return isObject(d) && objectToString(d) === '[object Date]';
+}
+exports.isDate = isDate;
+
+function isError(e) {
+  return isObject(e) &&
+      (objectToString(e) === '[object Error]' || e instanceof Error);
+}
+exports.isError = isError;
+
+function isFunction(arg) {
+  return typeof arg === 'function';
+}
+exports.isFunction = isFunction;
+
+function isPrimitive(arg) {
+  return arg === null ||
+         typeof arg === 'boolean' ||
+         typeof arg === 'number' ||
+         typeof arg === 'string' ||
+         typeof arg === 'symbol' ||  // ES6 symbol
+         typeof arg === 'undefined';
+}
+exports.isPrimitive = isPrimitive;
+
+exports.isBuffer = require('./support/isBuffer');
+
+function objectToString(o) {
+  return Object.prototype.toString.call(o);
+}
+
+
+function pad(n) {
+  return n < 10 ? '0' + n.toString(10) : n.toString(10);
+}
+
+
+var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
+              'Oct', 'Nov', 'Dec'];
+
+// 26 Feb 16:19:34
+function timestamp() {
+  var d = new Date();
+  var time = [pad(d.getHours()),
+              pad(d.getMinutes()),
+              pad(d.getSeconds())].join(':');
+  return [d.getDate(), months[d.getMonth()], time].join(' ');
+}
+
+
+// log is just a thin wrapper to console.log that prepends a timestamp
+exports.log = function() {
+  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
+};
+
+
+/**
+ * Inherit the prototype methods from one constructor into another.
+ *
+ * The Function.prototype.inherits from lang.js rewritten as a standalone
+ * function (not on Function.prototype). NOTE: If this file is to be loaded
+ * during bootstrapping this function needs to be rewritten using some native
+ * functions as prototype setup using normal JavaScript does not work as
+ * expected during bootstrapping (see mirror.js in r114903).
+ *
+ * @param {function} ctor Constructor function which needs to inherit the
+ *     prototype.
+ * @param {function} superCtor Constructor function to inherit prototype from.
+ */
+exports.inherits = require('inherits');
+
+exports._extend = function(origin, add) {
+  // Don't do anything if add isn't an object
+  if (!add || !isObject(add)) return origin;
+
+  var keys = Object.keys(add);
+  var i = keys.length;
+  while (i--) {
+    origin[keys[i]] = add[keys[i]];
+  }
+  return origin;
+};
+
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./support/isBuffer":87,"_process":68,"inherits":86}],89:[function(require,module,exports){
+module.exports={
+  "name": "mocha",
+  "version": "6.0.1",
+  "homepage": "https://mochajs.org/",
+  "notifyLogo": "https://ibin.co/4QuRuGjXvl36.png"
+}
+},{}]},{},[1]);
diff --git a/src/popup.html b/src/popup.html
index e108cf4..3de06de 100644
--- a/src/popup.html
+++ b/src/popup.html
@@ -1,7 +1,8 @@
 <!DOCTYPE html>
 <html>
 	<body>
-		<button id="reset">reset</button>
+		<button id="reset">reload</button>
+		<button id="test">tests</button>
 		<script src="popup.js"></script>
 	</body>
 </html>
diff --git a/src/popup.js b/src/popup.js
index 9f181bc..a03d7e9 100644
--- a/src/popup.js
+++ b/src/popup.js
@@ -1,4 +1,9 @@
 
+import browser from './browser.js'
+
 document.getElementById('reset').onclick = function(el) {
-  chrome.runtime.reload();
+  browser.runtime.reload()
+}
+document.getElementById('test').onclick = function(el) {
+  window.open(browser.extension.getURL("test.html"), '_blank')
 }
diff --git a/src/state.js b/src/state.js
index ffd9eb2..82392fd 100644
--- a/src/state.js
+++ b/src/state.js
@@ -1,5 +1,7 @@
-'use strict';
 
+/*
+ * data store
+ */
 const data = {
   fibSeq: [],
   tabs: {}
@@ -27,21 +29,28 @@ const calcNextVal = () => {
   return next;
 }
 
-exports.getVal = (id) => {
+const getVal = (id) => {
   return data.tabs[id];
 }
 
-exports.unset = (id) => {
-  delete data.tabs[id];
-}
-
-exports.nextVal = (id) => {
+const nextVal = (id) => {
   const val = calcNextVal();
   setVal(val, id);
   return val;
 }
 
-exports.reset = () => {
+const unset = (id) => {
+  delete data.tabs[id];
+}
+
+const reset = () => {
   data.fibSeq = [];
   data.tabs = {};
 }
+
+export default {
+  getVal,
+  nextVal,
+  unset,
+  reset
+}
diff --git a/src/state.test.js b/src/state.test.js
new file mode 100644
index 0000000..21de275
--- /dev/null
+++ b/src/state.test.js
@@ -0,0 +1,61 @@
+console.log('testing state lib')
+import chai from './chai.js'
+import state from './state.js'
+
+const expect = chai.expect
+
+const populate = (length) => {
+  for (let i = 0; i <= length; i++) {
+    state.nextVal(i)
+  }
+}
+
+
+describe('state lib', () => {
+
+  beforeEach(() => {
+    return state.reset()
+  })
+
+  it('add values to the fibonacci sequence and return them', () => {
+    state.nextVal(0) // 0
+    expect(state.getVal(0)).to.equal(0)
+    state.nextVal(0) // 1
+    expect(state.getVal(0)).to.equal(1)
+    state.nextVal(0) // 1
+    expect(state.getVal(0)).to.equal(1)
+    state.nextVal(0) // 2
+    expect(state.getVal(0)).to.equal(2)
+    state.nextVal(0) // 3
+    expect(state.getVal(0)).to.equal(3)
+    state.nextVal(0) // 5
+    expect(state.getVal(0)).to.equal(5)
+    state.nextVal(0) // 8
+    expect(state.getVal(0)).to.equal(8)
+  })
+
+  it('return saved value given an id', () => {
+    state.nextVal(1) // 0
+    state.nextVal(2) // 1
+    state.nextVal(3) // 1
+    state.nextVal(4) // 2
+    state.nextVal(5) // 3
+    state.nextVal(6) // 5
+    state.nextVal(7) // 8
+    expect(state.getVal(1)).to.equal(0)
+    expect(state.getVal(2)).to.equal(1)
+    expect(state.getVal(3)).to.equal(1)
+    expect(state.getVal(4)).to.equal(2)
+    expect(state.getVal(5)).to.equal(3)
+    expect(state.getVal(6)).to.equal(5)
+    expect(state.getVal(7)).to.equal(8)
+  })
+
+  it('can unset a given id', () => {
+    populate(10)
+    expect(state.getVal(10)).to.equal(55)
+    state.unset(10)
+    expect(typeof state.getVal(10)).to.equal('undefined')
+  })
+
+})
diff --git a/src/test.html b/src/test.html
new file mode 100644
index 0000000..95b6d33
--- /dev/null
+++ b/src/test.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>Mocha Tests</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="stylesheet" href="./mocha.css" />
+    <script src="./mocha.js"></script>
+    <script src="./browser-polyfill.js"></script>
+  </head>
+  <body>
+    <div id="mocha"></div>
+    <script type="module" src="./testsetup.js"></script>
+    <script type="module" src="./testrun.js"></script>
+  </body>
+</html>
diff --git a/src/testrun.js b/src/testrun.js
new file mode 100644
index 0000000..dcb3fce
--- /dev/null
+++ b/src/testrun.js
@@ -0,0 +1,4 @@
+console.log('loading testrun')
+import './state.test.js'
+import './background.test.js'
+mocha.run();
diff --git a/src/testsetup.js b/src/testsetup.js
new file mode 100644
index 0000000..233c912
--- /dev/null
+++ b/src/testsetup.js
@@ -0,0 +1,5 @@
+console.log('loading testsetup');
+//import chai from './chai.js'
+import mocha from './mocha.js'
+mocha.setup('bdd')
+mocha.growl() // Enables web notifications
diff --git a/test/background.js b/test/background.js
deleted file mode 100644
index 0b43821..0000000
--- a/test/background.js
+++ /dev/null
@@ -1,12 +0,0 @@
-const chrome = require('sinon-chrome/extensions');
-global.chrome = chrome;
-
-const winbo = require('../src/background')(chrome),
-      {describe, it} = require('mocha'),
-      assert = require('assert');
-
-describe('background worker', function () {
-  it('can determine truth', () => {
-    assert.equal(true, Boolean('truth'));
-  });
-});
diff --git a/test/state.js b/test/state.js
deleted file mode 100644
index dccb864..0000000
--- a/test/state.js
+++ /dev/null
@@ -1,59 +0,0 @@
-const state = require('../src/state');
-
-const {describe, it} = require('mocha'),
-      assert = require('assert');
-
-const populate = (length) => {
-  for (let i = 0; i <= length; i++) {
-    state.nextVal(i);
-  }
-};
-
-describe('state lib', () => {
-
-  beforeEach(() => {
-    return state.reset();
-  });
-
-  it('add values to the fibonacci sequence and return them', () => {
-    state.nextVal(0); // 0
-    assert.equal(state.getVal(0), 0);
-    state.nextVal(0); // 1
-    assert.equal(state.getVal(0), 1);
-    state.nextVal(0); // 1
-    assert.equal(state.getVal(0), 1);
-    state.nextVal(0); // 2
-    assert.equal(state.getVal(0), 2);
-    state.nextVal(0); // 3
-    assert.equal(state.getVal(0), 3);
-    state.nextVal(0); // 5
-    assert.equal(state.getVal(0), 5);
-    state.nextVal(0); // 8
-    assert.equal(state.getVal(0), 8);
-  });
-
-  it('return saved value given an id', () => {
-    state.nextVal(1); // 0
-    state.nextVal(2); // 1
-    state.nextVal(3); // 1
-    state.nextVal(4); // 2
-    state.nextVal(5); // 3
-    state.nextVal(6); // 5
-    state.nextVal(7); // 8
-    assert.equal(state.getVal(1), 0);
-    assert.equal(state.getVal(2), 1);
-    assert.equal(state.getVal(3), 1);
-    assert.equal(state.getVal(4), 2);
-    assert.equal(state.getVal(5), 3);
-    assert.equal(state.getVal(6), 5);
-    assert.equal(state.getVal(7), 8);
-  });
-
-  it('can unset a given id', () => {
-    populate(10);
-    assert.equal(state.getVal(10), 55);
-    state.unset(10);
-    assert(typeof state.getVal(10) === 'undefined');
-  });
-
-});