Add instrumentation to netlify build

.github/workflows/test-build.yml

@@ -36,10 +36,10 @@ jobs:
           runTests: false
           install-command: npm ci
 
-      - name: Use new netlify.toml
+      - name: Use tests specific netlify.toml  
         run: |
           rm -f netlify.toml
-          mv github-netlify.toml netlify.toml
+          mv tests-netlify.toml netlify.toml
         working-directory: site/gatsby-site
 
       - name: Install Netlify CLI
@@ -49,6 +49,7 @@ jobs:
         run: netlify build --context deploy-preview
         working-directory: site/gatsby-site
         env:
+          INSTRUMENT: true
           NETLIFY_SITE_ID: ${{ vars.NETLIFY_SITE_ID }}
           NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

site/gatsby-site/babel.config.js

@@ -0,0 +1,38 @@
+module.exports = function (api) {
+    api.cache(true);
+
+    const config = {
+        plugins: [
+            [
+                "@babel/plugin-proposal-decorators",
+                {
+                    legacy: true
+                }
+            ],
+        ],
+        presets: [
+            [
+                "babel-preset-gatsby",
+                {
+                    targets: {
+                        browsers: [">0.25%", "not dead"]
+                    }
+                }
+            ],
+        ],
+    };
+
+    if (process.env.INSTRUMENT) {
+
+        config.plugins.push([
+            "babel-plugin-istanbul",
+            {
+                "include": [
+                    "src/**/*.js"
+                ]
+            }
+        ]);
+    }
+
+    return config;
+};

site/gatsby-site/cypress.config.js

@@ -14,7 +14,11 @@ module.exports = defineConfig({
     // We've imported your old cypress plugins here.
     // You may want to clean this up later by importing these.
     setupNodeEvents(on, config) {
-      return require('./cypress/plugins/index.js')(on, config);
+      require('@cypress/code-coverage/task')(on, config);
+
+      require('./cypress/plugins/index.js')(on, config);
+
+      return config;
     },
     baseUrl: 'http://localhost:8000/',
   },

site/gatsby-site/cypress/support/e2e.js

@@ -13,6 +13,8 @@
 // https://on.cypress.io/configuration
 // ***********************************************************
 
+import '@cypress/code-coverage/support';
+
 // Import commands.js using ES2015 syntax:
 import './commands';
 

site/gatsby-site/gatsby-node.js

@@ -110,12 +110,6 @@ exports.onCreateWebpackConfig = ({ actions }) => {
   });
 };
 
-exports.onCreateBabelConfig = ({ actions }) => {
-  actions.setBabelPlugin({
-    name: '@babel/plugin-proposal-export-default-from',
-  });
-};
-
 exports.onCreateNode = async ({ node, getNode, actions }) => {
   const { createNodeField } = actions;