31 lines
950 B
JavaScript
31 lines
950 B
JavaScript
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// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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const key1 = {};
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const key2 = {};
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const set = new Set([, 1]);
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assertEquals(set.has(undefined), true);
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assertEquals(set.has(1), true);
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const doubleSet = new Set([,1.234]);
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assertEquals(doubleSet.has(undefined), true);
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assertEquals(doubleSet.has(1.234), true);
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const map = new Map([[, key1], [key2, ]]);
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assertEquals(map.get(undefined), key1);
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assertEquals(map.get(key2), undefined);
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const doublesMap = new Map([[, 1.234]]);
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assertEquals(doublesMap.get(undefined), 1.234);
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const weakmap = new WeakMap([[key1, ]]);
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assertEquals(weakmap.get(key1), undefined);
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assertThrows(() => new WeakSet([, {}]));
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assertThrows(() => new WeakSet([, 1.234]));
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assertThrows(() => new Map([, [, key1]]));
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assertThrows(() => new WeakMap([[, key1]]));
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assertThrows(() => new WeakMap([, [, key1]]));
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