1 // Copyright 2010 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 function Hash() { 29 for (var i = 0; i < 100; i++) { 30 this['a' + i] = i; 31 } 32 33 delete this.a50; // Ensure it's a normal object. 34 } 35 36 Hash.prototype.m = function() { 37 return 1; 38 }; 39 40 var h = new Hash(); 41 42 for (var i = 1; i < 100; i++) { 43 if (i == 50) { 44 h.m = function() { 45 return 2; 46 }; 47 } else if (i == 70) { 48 delete h.m; 49 } 50 assertEquals(i < 50 || i >= 70 ? 1 : 2, h.m()); 51 } 52 53 54 var nonsymbol = 'wwwww '.split(' ')[0]; 55 Hash.prototype.wwwww = Hash.prototype.m; 56 57 for (var i = 1; i < 100; i++) { 58 if (i == 50) { 59 h[nonsymbol] = function() { 60 return 2; 61 }; 62 } else if (i == 70) { 63 delete h[nonsymbol]; 64 } 65 assertEquals(i < 50 || i >= 70 ? 1 : 2, h.wwwww()); 66 } 67
