18defd9ff6930b4e24729971a61cf7469daf119beSteve Block// Copyright 2010 the V8 project authors. All rights reserved. 28defd9ff6930b4e24729971a61cf7469daf119beSteve Block// Redistribution and use in source and binary forms, with or without 38defd9ff6930b4e24729971a61cf7469daf119beSteve Block// modification, are permitted provided that the following conditions are 48defd9ff6930b4e24729971a61cf7469daf119beSteve Block// met: 58defd9ff6930b4e24729971a61cf7469daf119beSteve Block// 68defd9ff6930b4e24729971a61cf7469daf119beSteve Block// * Redistributions of source code must retain the above copyright 78defd9ff6930b4e24729971a61cf7469daf119beSteve Block// notice, this list of conditions and the following disclaimer. 88defd9ff6930b4e24729971a61cf7469daf119beSteve Block// * Redistributions in binary form must reproduce the above 98defd9ff6930b4e24729971a61cf7469daf119beSteve Block// copyright notice, this list of conditions and the following 108defd9ff6930b4e24729971a61cf7469daf119beSteve Block// disclaimer in the documentation and/or other materials provided 118defd9ff6930b4e24729971a61cf7469daf119beSteve Block// with the distribution. 128defd9ff6930b4e24729971a61cf7469daf119beSteve Block// * Neither the name of Google Inc. nor the names of its 138defd9ff6930b4e24729971a61cf7469daf119beSteve Block// contributors may be used to endorse or promote products derived 148defd9ff6930b4e24729971a61cf7469daf119beSteve Block// from this software without specific prior written permission. 158defd9ff6930b4e24729971a61cf7469daf119beSteve Block// 168defd9ff6930b4e24729971a61cf7469daf119beSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 178defd9ff6930b4e24729971a61cf7469daf119beSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 188defd9ff6930b4e24729971a61cf7469daf119beSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 198defd9ff6930b4e24729971a61cf7469daf119beSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 208defd9ff6930b4e24729971a61cf7469daf119beSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 218defd9ff6930b4e24729971a61cf7469daf119beSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 228defd9ff6930b4e24729971a61cf7469daf119beSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 238defd9ff6930b4e24729971a61cf7469daf119beSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 248defd9ff6930b4e24729971a61cf7469daf119beSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 258defd9ff6930b4e24729971a61cf7469daf119beSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 268defd9ff6930b4e24729971a61cf7469daf119beSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 278defd9ff6930b4e24729971a61cf7469daf119beSteve Block 288defd9ff6930b4e24729971a61cf7469daf119beSteve Blockfunction Hash() { 298defd9ff6930b4e24729971a61cf7469daf119beSteve Block for (var i = 0; i < 100; i++) { 308defd9ff6930b4e24729971a61cf7469daf119beSteve Block this['a' + i] = i; 318defd9ff6930b4e24729971a61cf7469daf119beSteve Block } 328defd9ff6930b4e24729971a61cf7469daf119beSteve Block 338defd9ff6930b4e24729971a61cf7469daf119beSteve Block delete this.a50; // Ensure it's a normal object. 348defd9ff6930b4e24729971a61cf7469daf119beSteve Block} 358defd9ff6930b4e24729971a61cf7469daf119beSteve Block 368defd9ff6930b4e24729971a61cf7469daf119beSteve BlockHash.prototype.m = function() { 378defd9ff6930b4e24729971a61cf7469daf119beSteve Block return 1; 388defd9ff6930b4e24729971a61cf7469daf119beSteve Block}; 398defd9ff6930b4e24729971a61cf7469daf119beSteve Block 408defd9ff6930b4e24729971a61cf7469daf119beSteve Blockvar h = new Hash(); 418defd9ff6930b4e24729971a61cf7469daf119beSteve Block 428defd9ff6930b4e24729971a61cf7469daf119beSteve Blockfor (var i = 1; i < 100; i++) { 438defd9ff6930b4e24729971a61cf7469daf119beSteve Block if (i == 50) { 448defd9ff6930b4e24729971a61cf7469daf119beSteve Block h.m = function() { 458defd9ff6930b4e24729971a61cf7469daf119beSteve Block return 2; 468defd9ff6930b4e24729971a61cf7469daf119beSteve Block }; 478defd9ff6930b4e24729971a61cf7469daf119beSteve Block } else if (i == 70) { 488defd9ff6930b4e24729971a61cf7469daf119beSteve Block delete h.m; 498defd9ff6930b4e24729971a61cf7469daf119beSteve Block } 508defd9ff6930b4e24729971a61cf7469daf119beSteve Block assertEquals(i < 50 || i >= 70 ? 1 : 2, h.m()); 518defd9ff6930b4e24729971a61cf7469daf119beSteve Block} 523bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch 533bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch 543bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdochvar nonsymbol = 'wwwww '.split(' ')[0]; 553bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben MurdochHash.prototype.wwwww = Hash.prototype.m; 563bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch 573bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdochfor (var i = 1; i < 100; i++) { 583bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch if (i == 50) { 593bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch h[nonsymbol] = function() { 603bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch return 2; 613bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch }; 623bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch } else if (i == 70) { 633bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch delete h[nonsymbol]; 643bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch } 653bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch assertEquals(i < 50 || i >= 70 ? 1 : 2, h.wwwww()); 663bec4d28b1f388dbc06a9c4276e1a03e86c52b04Ben Murdoch} 67