Dániel Bátyai
fde0d556ac
A list of changes: - 'es2015-subset' profile is deprecated, and an 'es.next' profile is added. - The default profile is changed to 'es.next' - Renamed the JERRY_ES2015 guard to JERRY_ESNEXT - Renamed JERRY_ES2015_BUILTIN_* guards to JERRY_BUILTIN_* - Moved es2015 specific tests to a new 'es.next' subdirectory - Updated docs, targets, and test runners to reflect these changes Resolves #3737. JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu
54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Test that Promises use @@species appropriately
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// Another constructor with no species will not be instantiated
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var test = new Promise(function(){});
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var bogoCount = 0;
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function bogusConstructor() { bogoCount++; }
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test.constructor = bogusConstructor;
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assert(Promise.resolve(test) instanceof Promise);
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assert(!(Promise.resolve(test) instanceof bogusConstructor));
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// If there is a species, it will be instantiated
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// @@species will be read exactly once, and the constructor is called with a
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// function
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var count = 0;
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var params;
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class MyPromise extends Promise {
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constructor(...args) {
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super(...args);
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params = args;
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}
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static get [Symbol.species]() {
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count++
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return this;
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}
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}
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var myPromise = MyPromise.resolve().then();
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assert(1 === count);
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assert(1 === params.length);
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assert('function' === typeof(params[0]));
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assert(myPromise instanceof MyPromise);
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assert(myPromise instanceof Promise);
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