mirror of
https://github.com/jerryscript-project/jerryscript.git
synced 2025-12-15 16:29:21 +00:00
e0d8c4ca10
Fully support @@species and SpeciesConstructor in Array and Promise builtins. Also added partial support to TypedArrays, but a rework is needed in %TypedArray%.prototype functions' typedarray constructor, which is out of this patch's scope. JerryScript-DCO-1.0-Signed-off-by: Daniel Balla dballa@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
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
// Copyright 2015 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// Test that Promises use @@species appropriately
|
|
|
|
// Another constructor with no species will not be instantiated
|
|
|
|
var test = new Promise(function(){});
|
|
var bogoCount = 0;
|
|
function bogusConstructor() { bogoCount++; }
|
|
test.constructor = bogusConstructor;
|
|
assert(Promise.resolve(test) instanceof Promise);
|
|
assert(!(Promise.resolve(test) instanceof bogusConstructor));
|
|
|
|
// If there is a species, it will be instantiated
|
|
// @@species will be read exactly once, and the constructor is called with a
|
|
// function
|
|
var count = 0;
|
|
var params;
|
|
|
|
class MyPromise extends Promise {
|
|
constructor(...args) {
|
|
super(...args);
|
|
params = args;
|
|
}
|
|
static get [Symbol.species]() {
|
|
count++
|
|
return this;
|
|
}
|
|
}
|
|
|
|
var myPromise = MyPromise.resolve().then();
|
|
assert(1 === count);
|
|
assert(1 === params.length);
|
|
assert('function' === typeof(params[0]));
|
|
assert(myPromise instanceof MyPromise);
|
|
assert(myPromise instanceof Promise);
|