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32 lines
786 B
JavaScript
32 lines
786 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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esid: sec-weakmap-iterable
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description: >
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If the iterable argument is empty, return new WeakMap object.
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info: |
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23.3.1.1 WeakMap ( [ 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 map.
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...
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---*/
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var counter = 0;
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var set = WeakMap.prototype.set;
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WeakMap.prototype.set = function(value) {
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counter++;
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return set.call(this, value);
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};
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var map = new WeakMap([]);
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assert.sameValue(Object.getPrototypeOf(map), WeakMap.prototype);
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assert(map instanceof WeakMap);
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assert.sameValue(
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counter, 0,
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'empty iterable does not call WeakMap.prototype.set'
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);
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