1 // Copyright 2009 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 // Test that getters can be defined and called with an index as a parameter. 29 30 var o = {}; 31 o.x = 42; 32 o.__defineGetter__('0', function() { return o.x; }); 33 assertEquals(o.x, o[0]); 34 assertEquals(o.x, o.__lookupGetter__('0')()); 35 36 o.__defineSetter__('0', function(y) { o.x = y; }); 37 assertEquals(o.x, o[0]); 38 assertEquals(o.x, o.__lookupGetter__('0')()); 39 o[0] = 21; 40 assertEquals(21, o.x); 41 o.__lookupSetter__(0)(7); 42 assertEquals(7, o.x); 43 44 function Pair(x, y) { 45 this.x = x; 46 this.y = y; 47 }; 48 Pair.prototype.__defineGetter__('0', function() { return this.x; }); 49 Pair.prototype.__defineGetter__('1', function() { return this.y; }); 50 Pair.prototype.__defineSetter__('0', function(x) { this.x = x; }); 51 Pair.prototype.__defineSetter__('1', function(y) { this.y = y; }); 52 53 var p = new Pair(2, 3); 54 assertEquals(2, p[0]); 55 assertEquals(3, p[1]); 56 p.x = 7; 57 p[1] = 8; 58 assertEquals(7, p[0]); 59 assertEquals(7, p.x); 60 assertEquals(8, p[1]); 61 assertEquals(8, p.y); 62 63 64 // Testing that a defined getter doesn't get lost due to inline caching. 65 var expected = {}; 66 var actual = {}; 67 for (var i = 0; i < 10; i++) { 68 expected[i] = actual[i] = i; 69 } 70 function testArray() { 71 for (var i = 0; i < 10; i++) { 72 assertEquals(expected[i], actual[i]); 73 } 74 } 75 actual[1000000] = -1; 76 testArray(); 77 testArray(); 78 actual.__defineGetter__('0', function() { return expected[0]; }); 79 expected[0] = 42; 80 testArray(); 81 expected[0] = 111; 82 testArray(); 83 84 // The functionality is not implemented for arrays due to performance issues. 85 var a = [ 1 ]; 86 a.__defineGetter__('2', function() { return 7; }); 87 assertEquals(undefined, a[2]); 88 assertEquals(1, a.length); 89 var b = 0; 90 a.__defineSetter__('5', function(y) { b = y; }); 91 assertEquals(1, a.length); 92 a[5] = 42; 93 assertEquals(0, b); 94 assertEquals(42, a[5]); 95 assertEquals(6, a.length); 96 97 // Using a setter where only a getter is defined throws an exception. 98 var q = {}; 99 q.__defineGetter__('0', function() { return 42; }); 100 assertThrows('q[0] = 7'); 101 102 // Using a getter where only a setter is defined returns undefined. 103 var q1 = {}; 104 q1.__defineSetter__('0', function() {q1.b = 17;}); 105 assertEquals(q1[0], undefined); 106 // Setter works 107 q1[0] = 3; 108 assertEquals(q1[0], undefined); 109 assertEquals(q1.b, 17); 110 111 // Complex case of using an undefined getter. 112 // From http://code.google.com/p/v8/issues/detail?id=298 113 // Reported by nth10sd. 114 115 a = function() {}; 116 __defineSetter__("0", function() {}); 117 if (a |= '') {}; 118 assertThrows('this[a].__parent__'); 119 assertEquals(a, 0); 120 assertEquals(this[a], undefined); 121
