40 lines
1.4 KiB
JavaScript
40 lines
1.4 KiB
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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// https://bugs.chromium.org/p/chromium/issues/detail?id=595319
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// Ensure exceptions are checked for by Array.prototype.concat from adding
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// an element, and that elements are added to array subclasses appropriately
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// If adding a property does throw, the exception is propagated
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class MyException extends Error { }
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class NoDefinePropertyArray extends Array {
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constructor(...args) {
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super(...args);
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return new Proxy(this, {
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defineProperty() { throw new MyException(); }
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});
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}
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}
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assertThrows(() => new NoDefinePropertyArray().concat([1]), MyException);
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// Ensure elements are added to the instance, rather than calling [[Set]].
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class ZeroGetterArray extends Array { get 0() {} };
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assertArrayEquals([1], new ZeroGetterArray().concat(1));
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// Frozen arrays lead to throwing
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class FrozenArray extends Array {
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constructor(...args) { super(...args); Object.freeze(this); }
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}
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assertThrows(() => new FrozenArray().concat([1]), TypeError);
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// Non-configurable non-writable zero leads to throwing
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class ZeroFrozenArray extends Array {
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constructor(...args) {
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super(...args);
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Object.defineProperty(this, 0, {value: 1});
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}
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}
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assertThrows(() => new ZeroFrozenArray().concat([1]), TypeError);
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