AsyncFunction-is-subclass.js (708B)
1 // Copyright 2016 Microsoft, Inc. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 author: Brian Terlson <brian.terlson@microsoft.com> 6 esid: sec-async-function-constructor 7 description: > 8 %AsyncFunction% is a subclass of Function 9 ---*/ 10 async function foo() {}; 11 var AsyncFunction = foo.constructor; 12 assert.sameValue(Object.getPrototypeOf(AsyncFunction), Function, "Prototype of constructor is Function"); 13 assert.sameValue(Object.getPrototypeOf(AsyncFunction.prototype), Function.prototype, "Prototype of constructor's prototype is Function.prototype"); 14 assert(foo instanceof Function, 'async function instance is instanceof Function'); 15 16 reportCompare(0, 0);