mirror of https://github.com/tc39/test262.git
52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
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// Copyright (C) 2020 Alexey Shvayka. 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-asynciteratorclose
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description: >
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If retrieving an iterator's `return` method generates an error while
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closing the iterator with throw completion, this error should be suppressed.
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info: |
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AsyncIteratorClose ( iteratorRecord, completion )
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[...]
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4. Let innerResult be GetMethod(iterator, "return").
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5. If innerResult.[[Type]] is normal,
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[...]
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6. If completion.[[Type]] is throw, return Completion(completion).
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7. If innerResult.[[Type]] is throw, return Completion(innerResult).
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GetMethod ( V, P )
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[...]
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2. Let func be ? GetV(V, P).
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features: [async-iteration]
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flags: [async]
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---*/
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const asyncIterable = {};
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asyncIterable[Symbol.asyncIterator] = function() {
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return {
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next: function() {
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return { done: false, value: null };
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},
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get return() {
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throw { name: "inner error" };
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},
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};
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};
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let iterationCount = 0;
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const promise = (async function() {
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for await (const x of asyncIterable) {
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iterationCount += 1;
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throw new Test262Error("should not be overriden");
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}
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})();
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promise.then(function(value) {
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throw new Test262Error("Promise should be rejected, got: " + value);
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}, function(error) {
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assert.sameValue(error.constructor, Test262Error);
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assert.sameValue(iterationCount, 1, "The loop body is evaluated");
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}).then($DONE, $DONE);
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