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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --harmony-species
// ArrayBuffer.prototype.slice makes subclass and checks length
class MyArrayBuffer extends ArrayBuffer { }
assertEquals(MyArrayBuffer, new MyArrayBuffer(0).slice().constructor);
class MyShortArrayBuffer extends ArrayBuffer {
constructor(length) { super(length - 1); }
}
assertThrows(() => new MyShortArrayBuffer(5).slice(0, 4), TypeError);
class SingletonArrayBuffer extends ArrayBuffer {
constructor(...args) {
if (SingletonArrayBuffer.cached) return SingletonArrayBuffer.cached;
super(...args);
SingletonArrayBuffer.cached = this;
}
}
assertThrows(() => new SingletonArrayBuffer(5).slice(0, 4), TypeError);
class NonArrayBuffer extends ArrayBuffer {
constructor() {
return {};
}
}
assertThrows(() => new NonArrayBuffer(5).slice(0, 4), TypeError);
// Species fallback is ArrayBuffer
class UndefinedArrayBuffer extends ArrayBuffer { }
UndefinedArrayBuffer.prototype.constructor = undefined;
assertEquals(ArrayBuffer, new UndefinedArrayBuffer(0).slice().constructor);
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