37 lines
1.2 KiB
JavaScript
37 lines
1.2 KiB
JavaScript
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// Copyright 2015 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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// ArrayBuffer.prototype.slice makes subclass and checks length
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class MyArrayBuffer extends ArrayBuffer { }
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assertEquals(MyArrayBuffer, new MyArrayBuffer(0).slice().constructor);
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class MyShortArrayBuffer extends ArrayBuffer {
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constructor(length) { super(length - 1); }
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}
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assertThrows(() => new MyShortArrayBuffer(5).slice(0, 4), TypeError);
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class SingletonArrayBuffer extends ArrayBuffer {
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constructor(...args) {
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if (SingletonArrayBuffer.cached) return SingletonArrayBuffer.cached;
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super(...args);
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SingletonArrayBuffer.cached = this;
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}
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}
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assertThrows(() => new SingletonArrayBuffer(5).slice(0, 4), TypeError);
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class NonArrayBuffer extends ArrayBuffer {
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constructor() {
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return {};
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}
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}
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assertThrows(() => new NonArrayBuffer(5).slice(0, 4), TypeError);
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// Species fallback is ArrayBuffer
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class UndefinedArrayBuffer extends ArrayBuffer { }
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UndefinedArrayBuffer.prototype.constructor = undefined;
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assertEquals(ArrayBuffer, new UndefinedArrayBuffer(0).slice().constructor);
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