mirror of https://github.com/tc39/test262.git
44 lines
1.2 KiB
JavaScript
44 lines
1.2 KiB
JavaScript
// Copyright (C) 2020 Rick Waldron. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: >
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Invocation of the constructor's `resolve` method for iterable with promise values
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esid: sec-promise.all
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info: |
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Let result be PerformPromiseAll(iteratorRecord, C, promiseCapability).
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Runtime Semantics: PerformPromiseAll
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Repeat
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...
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Let nextPromise be ? Call(promiseResolve, constructor, « nextValue »).
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flags: [async]
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features: [class, arrow-function]
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---*/
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class Custom extends Promise {}
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let values = [1, 1, 1];
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let cresolveCallCount = 0;
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let presolveCallCount = 0;
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let boundCustomResolve = Custom.resolve.bind(Custom);
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let boundPromiseResolve = Promise.resolve.bind(Promise);
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Custom.resolve = function(...args) {
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cresolveCallCount += 1;
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return boundCustomResolve(...args);
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};
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Promise.resolve = function(...args) {
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presolveCallCount += 1;
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return boundPromiseResolve(...args);
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};
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Promise.all.call(Custom, values)
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.then(() => {
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assert.sameValue(presolveCallCount, 0, '`Promise.resolve` is never invoked');
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assert.sameValue(cresolveCallCount, 3, '`Custom.resolve` invoked once for every iterated promise');
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}).then($DONE, $DONE);
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