29 lines
940 B
JavaScript
29 lines
940 B
JavaScript
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// Copyright 2016 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: --harmony-species
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// Overwriting the constructor of an instance updates the protector
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let x = [];
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assertEquals(Array, x.map(()=>{}).constructor);
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assertEquals(Array, x.filter(()=>{}).constructor);
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assertEquals(Array, x.slice().constructor);
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assertEquals(Array, x.splice().constructor);
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assertEquals(Array, x.concat([1]).constructor);
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assertEquals(1, x.concat([1])[0]);
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class MyArray extends Array { }
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Object.prototype[Symbol.species] = MyArray;
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delete Array[Symbol.species];
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assertEquals(MyArray, x.map(()=>{}).constructor);
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assertEquals(MyArray, x.filter(()=>{}).constructor);
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assertEquals(MyArray, x.slice().constructor);
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assertEquals(MyArray, x.splice().constructor);
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assertEquals(MyArray, x.concat([1]).constructor);
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assertEquals(1, x.concat([1])[0]);
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