Fix the crash when hashing an async function

puleos · Dec 12, 2019 · c359c2d · c359c2d
1 parent 9b84910
commit c359c2d
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Showing 3 changed files with 15 additions and 1 deletion.
diff --git a/index.js b/index.js
@@ -214,7 +214,7 @@ function typeHasher(options, writeTo, context){
         return write(object);
       }
 
-      if(objType !== 'object' && objType !== 'function') {
+      if(objType !== 'object' && objType !== 'function' && objType !== 'asyncfunction') {
         if(this['_' + objType]) {
           this['_' + objType](object);
         } else if (options.ignoreUnknown) {

diff --git a/test/index.js b/test/index.js
@@ -219,6 +219,18 @@ describe('hash', function() {
     assert.notEqual(c,d, 'changing a property in the prototype changes the hash');
   });
 
+  it('distinguishes async functions based on their properties', function() {
+    var a, b;
+
+    async function Foo() {}
+    a = hash(Foo);
+
+    Foo.foo = 22;
+    b = hash(Foo);
+
+    assert.notEqual(a,b, 'adding a property changes the hash');
+  });
+
   it('Distinguish objects based on their type', function() {
 
     function Foo() {}

diff --git a/test/types.js b/test/types.js
@@ -8,11 +8,13 @@ var validSha1 = /^[0-9a-f]{40}$/i;
 describe('hash()ing different types', function() {
   it('hashes non-object types', function() {
     var func = function(a){ return a + 1; };
+    var asyncFunc = async function(a){ return a + 1; };
     assert.ok(validSha1.test(hash('Shazbot!')), 'hash string');
     assert.ok(validSha1.test(hash(42)), 'hash number');
     assert.ok(validSha1.test(hash(NaN)), 'hash bool');
     assert.ok(validSha1.test(hash(true)), 'hash bool');
     assert.ok(validSha1.test(hash(func)), 'hash function');
+    assert.ok(validSha1.test(hash(asyncFunc)), 'hash async function');
   });
 
   it('hashes special object types', function() {