Files
jerryscript/tests/jerry/promise-species.js
Szilagyi Adam 4924f9fd31 Remove ES_NEXT macro (#4915)
- remove all '#JERRY_ESNEXT' macro
- remove 5.1 build profile, update test runner accordingly (Note: all builtins are turn on by default)
- move tests from tests/jerry/esnext into tests/jerry, concatenate files with same names
- add skiplist to some snapshot tests that were supported only in 5.1
- fix doxygen issues that were hidden before (bc. of es.next macro)

Co-authored-by: Martin Negyokru negyokru@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
2022-01-31 16:46:00 +01:00

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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);