JezK
Edit File: regress-619.js
// Copyright 2010 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Tests that Object.defineProperty works correctly on array indices. // Please see http://code.google.com/p/v8/issues/detail?id=619 for details. var obj = {}; obj[1] = 42; assertEquals(42, obj[1]); Object.defineProperty(obj, '1', {value:10, writable:false}); assertEquals(10, obj[1]); // We should not be able to override obj[1]. obj[1] = 5; assertEquals(10, obj[1]); // Try on a range of numbers. for(var i = 0; i < 1024; i++) { obj[i] = 42; } for(var i = 0; i < 1024; i++) { Object.defineProperty(obj, i, {value: i, writable:false}); } for(var i = 0; i < 1024; i++) { assertEquals(i, obj[i]); } for(var i = 0; i < 1024; i++) { obj[1] = 5; } for(var i = 0; i < 1024; i++) { assertEquals(i, obj[i]); }