mirror of https://github.com/tc39/test262.git
40 lines
947 B
JavaScript
40 lines
947 B
JavaScript
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// Copyright (C) 2018 Kevin Gibbons. 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: Closes iterators when they return entries which are null.
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esid: sec-object.fromentries
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features: [Symbol.iterator, Object.fromEntries]
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---*/
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var returned = false;
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var iterable = {
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[Symbol.iterator]: function() {
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var advanced = false;
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return {
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next: function() {
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if (advanced) {
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throw new Test262Error('should only advance once');
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}
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advanced = true;
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return {
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done: false,
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value: 'null',
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};
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},
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return: function() {
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if (returned) {
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throw new Test262Error('should only return once');
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}
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returned = true;
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},
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};
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},
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};
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assert.throws(TypeError, function() {
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Object.fromEntries(iterable);
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});
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assert(returned, 'iterator should be closed when entry is null');
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