1 // Copyright 2012 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 // Regression test checking that the sequence of element access in built-in 29 // array functions is specification conform (i.e. [[HasProperty]] might return 30 // bogus result after [[Get]] has been called). 31 32 function CheckSequence(builtin, callback) { 33 var array = [1,2,3]; 34 var callback_count = 0; 35 var callback_wrapper = function() { 36 callback_count++; 37 return callback() 38 } 39 40 // Define getter that will delete itself upon first invocation. 41 Object.defineProperty(array, '1', { 42 get: function () { delete array[1]; }, 43 configurable: true 44 }); 45 46 assertTrue(array.hasOwnProperty('1')); 47 builtin.apply(array, [callback_wrapper, 'argument']); 48 assertFalse(array.hasOwnProperty('1')); 49 assertEquals(3, callback_count); 50 } 51 52 CheckSequence(Array.prototype.every, function() { return true; }); 53 CheckSequence(Array.prototype.filter, function() { return true; }); 54 CheckSequence(Array.prototype.forEach, function() { return 0; }); 55 CheckSequence(Array.prototype.map, function() { return 0; }); 56 CheckSequence(Array.prototype.reduce, function() { return 0; }); 57 CheckSequence(Array.prototype.reduceRight, function() { return 0; }); 58 CheckSequence(Array.prototype.some, function() { return false; }); 59
