mirror of https://github.com/tc39/test262.git
34 lines
1014 B
JavaScript
34 lines
1014 B
JavaScript
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// Copyright (C) 2022 Igalia, S.L. 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-weakset-iterable
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description: >
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Returns the new WeakSet adding Symbol values from the iterable parameter.
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info: |
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WeakSet ( [ _iterable_ ] )
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8. Repeat,
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d. Let _status_ be Completion(Call(_adder_, _set_, « _nextValue_ »)).
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WeakSet.prototype.add ( _value_ ):
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6. Append _value_ as the last element of _entries_.
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features: [Symbol, WeakSet, symbols-as-weakmap-keys]
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---*/
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var first = Symbol('a description');
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var second = Symbol('a description');
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var added = [];
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var realAdd = WeakSet.prototype.add;
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WeakSet.prototype.add = function(value) {
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added.push(value);
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return realAdd.call(this, value);
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};
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var s = new WeakSet([first, second, Symbol.hasInstance]);
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assert.compareArray(
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added,
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[first, second, Symbol.hasInstance],
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"add() was called 3 times, on the two unregistered and one well-known symbols in order"
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);
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WeakSet.prototype.add = realAdd;
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