23 lines
773 B
JavaScript
23 lines
773 B
JavaScript
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// Copyright 2018 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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// Flags: --allow-natives-syntax --no-stress-opt
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var map = new Map([[1,2], [2,3], [3,4]]);
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assertTrue(%MapIteratorProtector());
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assertTrue(%SetIteratorProtector());
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// This changes %MapIteratorPrototype%. No more tests should be run after this
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// in the same instance.
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var iterator = map[Symbol.iterator]();
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iterator.__proto__.next = () => ({done: true});
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assertFalse(%MapIteratorProtector());
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assertTrue(%SetIteratorProtector());
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assertEquals([], [...map]);
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assertEquals([], [...map.entries()]);
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assertEquals([], [...map.keys()]);
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assertEquals([], [...map.values()]);
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assertEquals([], [...iterator]);
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