1 // Copyright 2008 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 // This file contains a number of tests of array functions and their 29 // interaction with properties in the prototype chain. 30 // 31 // The behavior of SpiderMonkey is slightly different for arrays (see 32 // below). Our behavior is consistent and matches the bahavior of 33 // KJS. 34 35 var proto = { length:3, 0:'zero', 1:'one', 2:'two' } 36 function constructor() {}; 37 constructor.prototype = proto; 38 39 // Set elements on the array prototype. 40 Array.prototype[0] = 'zero'; 41 Array.prototype[1] = 'one'; 42 Array.prototype[2] = 'two'; 43 44 // ---------------------------------------------------------------------- 45 // Helper functions. 46 // ---------------------------------------------------------------------- 47 function assertHasOwnProperties(object, limit) { 48 for (var i = 0; i < limit; i++) { 49 assertTrue(object.hasOwnProperty(i)); 50 } 51 } 52 53 54 // ---------------------------------------------------------------------- 55 // shift. 56 // ---------------------------------------------------------------------- 57 58 function runTest1() { 59 var nonArray = new constructor(); 60 var array = ['zero', , 'two']; 61 // Shift away the zero. 62 assertEquals('zero', array.shift()); 63 assertEquals('zero', Array.prototype.shift.call(nonArray)); 64 // Check that the local object has properties 0 and 1 with the right 65 // values. 66 assertEquals(2, array.length); 67 assertEquals(2, nonArray.length); 68 assertHasOwnProperties(array, 2); 69 assertHasOwnProperties(nonArray, 2); 70 // Note: Spidermonkey is inconsistent here. It treats arrays 71 // differently from non-arrays. It only consults the prototype for 72 // non-arrays. Therefore, array[0] is undefined in Spidermonkey and 73 // 'one' in V8 and KJS. 74 assertEquals('one', array[0]); 75 assertEquals('one', nonArray[0]); 76 assertEquals('two', array[1]); 77 assertEquals('two', nonArray[1]); 78 // Get index 2 from the prototype. 79 assertEquals('two', array[2]); 80 assertEquals('two', nonArray[2]); 81 } 82 83 runTest1(); 84 85 // ---------------------------------------------------------------------- 86 // unshift. 87 // ---------------------------------------------------------------------- 88 89 runTest2 = function() { 90 var nonArray = new constructor(); 91 var array = ['zero', , 'two']; 92 // Unshift a new 'zero'. 93 assertEquals(4, array.unshift('zero')); 94 assertEquals(4, Array.prototype.unshift.call(nonArray, 'zero')); 95 // Check that the local object has properties 0 through 3 with the 96 // right values. 97 assertEquals(4, array.length); 98 assertEquals(4, nonArray.length); 99 assertHasOwnProperties(array, 4); 100 assertHasOwnProperties(nonArray, 4); 101 assertEquals('zero', array[0]); 102 assertEquals('zero', nonArray[0]); 103 assertEquals('zero', array[1]); 104 assertEquals('zero', nonArray[1]); 105 // Again Spidermonkey is inconsistent. array[2] is undefined 106 // instead of 'one'. 107 assertEquals('one', array[2]); 108 assertEquals('one', nonArray[2]); 109 assertEquals('two', array[3]); 110 assertEquals('two', nonArray[3]); 111 } 112 113 runTest2(); 114 115 116 // ---------------------------------------------------------------------- 117 // splice 118 // ---------------------------------------------------------------------- 119 120 runTest3 = function() { 121 var nonArray = new constructor(); 122 var array = ['zero', , 'two']; 123 // Delete the first element by splicing in nothing. 124 assertArrayEquals(['zero'], array.splice(0, 1)); 125 assertArrayEquals(['zero'], Array.prototype.splice.call(nonArray, 0, 1)); 126 // Check that the local object has properties 0 and 1 with the right 127 // values. 128 assertEquals(2, array.length); 129 assertEquals(2, nonArray.length); 130 assertHasOwnProperties(array, 2); 131 assertHasOwnProperties(nonArray, 2); 132 // Again Spidermonkey is inconsistent. array[0] is undefined 133 // instead of 'one'. 134 assertEquals('one', array[0]); 135 assertEquals('one', nonArray[0]); 136 assertEquals('two', array[1]); 137 assertEquals('two', nonArray[1]); 138 // Get index 2 from the prototype. 139 assertEquals('two', array[2]); 140 assertEquals('two', nonArray[2]); 141 }; 142 143 runTest3(); 144 145 146 // ---------------------------------------------------------------------- 147 // slice 148 // ---------------------------------------------------------------------- 149 150 runTest4 = function() { 151 var nonArray = new constructor(); 152 var array = ['zero', , 'two']; 153 // Again Spidermonkey is inconsistent. (array.slice(0, 3))[1] is 154 // undefined instead of 'one'. 155 assertArrayEquals(['zero', 'one', 'two'], array.slice(0, 3)); 156 assertArrayEquals(['zero', 'one', 'two'], Array.prototype.slice.call(nonArray, 0, 3)); 157 }; 158 159 runTest4(); 160
