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PR-URL: https://github.com/nodejs/node/pull/19989 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Matheus Marchini <matheus@sthima.com> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Myles Borins <myles.borins@gmail.com>
29 lines
965 B
JavaScript
29 lines
965 B
JavaScript
// 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: --allow-natives-syntax
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// Overwriting Array[Symbol.species] 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.defineProperty(Array, Symbol.species, {value: MyArray});
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assertFalse(%ArraySpeciesProtector());
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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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