mirror of https://github.com/tc39/test262.git
50 lines
1.3 KiB
JavaScript
50 lines
1.3 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. 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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Error thrown when accessing the instance's `then` method (closing iterator)
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esid: sec-promise.race
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es6id: 25.4.4.3
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info: |
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11. Let result be PerformPromiseRace(iteratorRecord, C, promiseCapability).
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12. If result is an abrupt completion,
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a. If iteratorRecord.[[done]] is false, let result be
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IteratorClose(iterator, result).
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b. IfAbruptRejectPromise(result, promiseCapability).
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[...]
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25.4.4.3.1 Runtime Semantics: PerformPromiseRace
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1. Repeat
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[...]
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j. Let result be Invoke(nextPromise, "then",
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«promiseCapability.[[Resolve]], promiseCapability.[[Reject]]»).
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k. ReturnIfAbrupt(result).
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features: [Symbol.iterator]
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---*/
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var promise = new Promise(function() {});
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var iter = {};
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var returnCount = 0;
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iter[Symbol.iterator] = function() {
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return {
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next: function() {
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return { done: false, value: promise };
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},
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return: function() {
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returnCount += 1;
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return {};
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}
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};
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};
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Object.defineProperty(promise, 'then', {
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get: function() {
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throw new Test262Error();
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}
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});
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Promise.race(iter);
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assert.sameValue(returnCount, 1);
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