mirror of https://github.com/tc39/test262.git
48 lines
1.5 KiB
JavaScript
48 lines
1.5 KiB
JavaScript
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// 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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esid: sec-promise.race
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description: Resolution ticks are set in a predictable sequence
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info: |
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PerformPromiseRace
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Repeat,
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Let next be IteratorStep(iteratorRecord).
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If next is an abrupt completion, set iteratorRecord.[[Done]] to true.
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ReturnIfAbrupt(next).
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If next is false, then
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Set iteratorRecord.[[Done]] to true.
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Return resultCapability.[[Promise]].
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Let nextValue be IteratorValue(next).
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If nextValue is an abrupt completion, set iteratorRecord.[[Done]] to true.
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ReturnIfAbrupt(nextValue).
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Let nextPromise be ? Call(promiseResolve, constructor, « nextValue »).
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Perform ? Invoke(nextPromise, "then", « resultCapability.[[Resolve]], resultCapability.[[Reject]] »).
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flags: [async]
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includes: [compareArray.js,promiseHelper.js]
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---*/
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let a = new Promise((_, reject) => reject('a'));
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let b = new Promise((_, reject) => reject('b'));
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let sequence = [1];
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Promise.all([
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a.catch(() => {
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sequence.push(3);
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return checkSequence(sequence, 'Expected to be called first.');
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}),
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Promise.race([a, b]).catch(() => {
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sequence.push(5);
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return checkSequence(sequence, 'Expected to be called third.');
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}),
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b.catch(() => {
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sequence.push(4);
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return checkSequence(sequence, 'Expected to be called second.');
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})
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]).then(result => {
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compareArray(result, [true, true, true]);
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}).then($DONE, $DONE);
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sequence.push(2);
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