mirror of https://github.com/tc39/test262.git
47 lines
1.2 KiB
JavaScript
47 lines
1.2 KiB
JavaScript
// 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-iteratorclose
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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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IteratorClose ( 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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3. If func is either undefined or null, return undefined.
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4. If IsCallable(func) is false, throw a TypeError exception.
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features: [Symbol.iterator]
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---*/
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var iterable = {};
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var iterationCount = 0;
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iterable[Symbol.iterator] = 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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return: 'str',
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};
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};
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assert.throws(Test262Error, function() {
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for (var x of iterable) {
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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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assert.sameValue(iterationCount, 1, 'The loop body is evaluated');
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