mirror of https://github.com/tc39/test262.git
49 lines
1.1 KiB
JavaScript
49 lines
1.1 KiB
JavaScript
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// Copyright (C) 2015 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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es6id: 13.6.4.13
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description: >
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Iterators should be closed via their `return` method when iteration is
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interrupted via a `throw` statement.
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features: [Symbol.iterator]
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---*/
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var startedCount = 0;
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var returnCount = 0;
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var iterationCount = 0;
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var iterable = {};
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iterable[Symbol.iterator] = function() {
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return {
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next: function() {
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startedCount += 1;
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return { done: false, value: null };
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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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try {
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for (var x of iterable) {
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assert.sameValue(
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startedCount, 1, 'Value is retrieved'
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);
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assert.sameValue(
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returnCount, 0, 'Iterator is not closed'
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);
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iterationCount += 1;
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throw 0;
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}
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} catch (err) {}
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assert.sameValue(
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startedCount, 1, 'Iterator does not restart following interruption'
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);
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assert.sameValue(iterationCount, 1, 'A single iteration occurs');
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assert.sameValue(
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returnCount, 1, 'Iterator is closed after `throw` statement'
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);
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