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32 lines
775 B
JavaScript
32 lines
775 B
JavaScript
// 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: 23.4.1.1
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description: >
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If the iterable argument is empty, return new Weakset object.
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info: >
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23.4.1.1 WeakSet ( [ iterable ] )
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...
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9. Repeat
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a. Let next be IteratorStep(iter).
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b. ReturnIfAbrupt(next).
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c. If next is false, return set.
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...
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---*/
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var counter = 0;
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var add = WeakSet.prototype.add;
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WeakSet.prototype.add = function(value) {
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counter++;
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return add.call(this, value);
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};
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var set = new WeakSet([]);
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assert.sameValue(Object.getPrototypeOf(set), WeakSet.prototype);
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assert(set instanceof WeakSet);
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assert.sameValue(
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counter, 0,
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'empty iterable does not call WeakSet.prototype.add'
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);
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