1 // Copyright 2016 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // https://bugs.chromium.org/p/chromium/issues/detail?id=595319 6 // Ensure exceptions are checked for by Array.prototype.concat from adding 7 // an element, and that elements are added to array subclasses appropriately 8 9 // If adding a property does throw, the exception is propagated 10 class MyException extends Error { } 11 class NoDefinePropertyArray extends Array { 12 constructor(...args) { 13 super(...args); 14 return new Proxy(this, { 15 defineProperty() { throw new MyException(); } 16 }); 17 } 18 } 19 assertThrows(() => new NoDefinePropertyArray().concat([1]), MyException); 20 21 // Ensure elements are added to the instance, rather than calling [[Set]]. 22 class ZeroGetterArray extends Array { get 0() {} }; 23 assertArrayEquals([1], new ZeroGetterArray().concat(1)); 24 25 // Frozen arrays lead to throwing 26 27 class FrozenArray extends Array { 28 constructor(...args) { super(...args); Object.freeze(this); } 29 } 30 assertThrows(() => new FrozenArray().concat([1]), TypeError); 31 32 // Non-configurable non-writable zero leads to throwing 33 class ZeroFrozenArray extends Array { 34 constructor(...args) { 35 super(...args); 36 Object.defineProperty(this, 0, {value: 1}); 37 } 38 } 39 assertThrows(() => new ZeroFrozenArray().concat([1]), TypeError); 40
