1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions 6 // are met: 7 // 1. Redistributions of source code must retain the above copyright 8 // notice, this list of conditions and the following disclaimer. 9 // 2. Redistributions in binary form must reproduce the above copyright 10 // notice, this list of conditions and the following disclaimer in the 11 // documentation and/or other materials provided with the distribution. 12 // 13 // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 24 description("Test to ensure correct behaviour of Object.defineProperty"); 25 26 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty({}, 'foo', {value:1}), 'foo'))", 27 "JSON.stringify({value: 1, writable: false, enumerable: false, configurable: false})"); 28 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty({}, 'foo', {}), 'foo'))", 29 "JSON.stringify({writable: false, enumerable: false, configurable: false})"); 30 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty({}, 'foo', {get:undefined}), 'foo'))", 31 "JSON.stringify({enumerable: false, configurable: false})"); 32 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty({}, 'foo', {value:1, writable: false}), 'foo'))", 33 "JSON.stringify({value: 1, writable: false, enumerable: false, configurable: false})"); 34 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty({}, 'foo', {value:1, writable: true}), 'foo'))", 35 "JSON.stringify({value: 1, writable: true, enumerable: false, configurable: false})"); 36 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty({}, 'foo', {value:1, enumerable: false}), 'foo'))", 37 "JSON.stringify({value: 1, writable: false, enumerable: false, configurable: false})"); 38 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty({}, 'foo', {value:1, enumerable: true}), 'foo'))", 39 "JSON.stringify({value: 1, writable: false, enumerable: true, configurable: false})"); 40 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty({}, 'foo', {value:1, configurable: false}), 'foo'))", 41 "JSON.stringify({value: 1, writable: false, enumerable: false, configurable: false})"); 42 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty({}, 'foo', {value:1, configurable: true}), 'foo'))", 43 "JSON.stringify({value: 1, writable: false, enumerable: false, configurable: true})"); 44 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty([1,2,3], 'foo', {value:1, configurable: true}), 'foo'))", 45 "JSON.stringify({value: 1, writable: false, enumerable: false, configurable: true})"); 46 shouldBe("Object.getOwnPropertyDescriptor(Object.defineProperty([1,2,3], '1', {value:'foo', configurable: true}), '1').value", "'foo'"); 47 shouldBe("a=[1,2,3], Object.defineProperty(a, '1', {value:'foo', configurable: true}), a[1]", "'foo'"); 48 shouldBe("Object.getOwnPropertyDescriptor(Object.defineProperty([1,2,3], '1', {get:getter, configurable: true}), '1').get", "getter"); 49 shouldThrow("Object.defineProperty([1,2,3], '1', {get:getter, configurable: true})[1]", "'called getter'"); 50 51 shouldThrow("Object.defineProperty()"); 52 shouldThrow("Object.defineProperty(null)"); 53 shouldThrow("Object.defineProperty('foo')"); 54 shouldThrow("Object.defineProperty({})"); 55 shouldThrow("Object.defineProperty({}, 'foo')"); 56 shouldThrow("Object.defineProperty({}, 'foo', {get:undefined, value:true}).foo"); 57 shouldBeTrue("Object.defineProperty({get foo() { return true; } }, 'foo', {configurable:false}).foo"); 58 59 function createUnconfigurableProperty(o, prop, writable, enumerable) { 60 writable = writable || false; 61 enumerable = enumerable || false; 62 return Object.defineProperty(o, prop, {value:1, configurable:false, writable: writable, enumerable: enumerable}); 63 } 64 shouldThrow("Object.defineProperty(createUnconfigurableProperty({}, 'foo'), 'foo', {configurable: true})"); 65 shouldThrow("Object.defineProperty(createUnconfigurableProperty({}, 'foo'), 'foo', {writable: true})"); 66 shouldThrow("Object.defineProperty(createUnconfigurableProperty({}, 'foo'), 'foo', {enumerable: true})"); 67 shouldThrow("Object.defineProperty(createUnconfigurableProperty({}, 'foo', false, true), 'foo', {enumerable: false}), 'foo'"); 68 69 shouldBe("JSON.stringify(Object.getOwnPropertyDescriptor(Object.defineProperty(createUnconfigurableProperty({}, 'foo', true), 'foo', {writable: false}), 'foo'))", 70 "JSON.stringify({value: 1, writable: false, enumerable: false, configurable: false})"); 71 72 shouldThrow("Object.defineProperty({}, 'foo', {value:1, get: function(){}})"); 73 shouldThrow("Object.defineProperty({}, 'foo', {value:1, set: function(){}})"); 74 shouldThrow("Object.defineProperty({}, 'foo', {writable:true, get: function(){}})"); 75 shouldThrow("Object.defineProperty({}, 'foo', {writable:true, set: function(){}})"); 76 shouldThrow("Object.defineProperty({}, 'foo', {get: null})"); 77 shouldThrow("Object.defineProperty({}, 'foo', {set: null})"); 78 function getter(){ throw "called getter"; } 79 function getter1(){ throw "called getter1"; } 80 function setter(){ throw "called setter"; } 81 function setter1(){ throw "called setter1"; } 82 shouldThrow("Object.defineProperty({}, 'foo', {set: setter}).foo='test'", "'called setter'"); 83 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {set: setter}), 'foo', {set: setter1})"); 84 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {set: setter}), 'foo', {get: getter1})"); 85 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {set: setter}), 'foo', {value: 1})"); 86 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {set: setter, configurable: true}), 'foo', {set: setter1}).foo='test'", "'called setter1'"); 87 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {set: setter, configurable: true}), 'foo', {get: getter1}).foo", "'called getter1'"); 88 shouldBeTrue("Object.defineProperty(Object.defineProperty({}, 'foo', {set: setter, configurable: true}), 'foo', {value: true}).foo"); 89 shouldBeTrue("'foo' in Object.defineProperty(Object.defineProperty({}, 'foo', {set: setter, configurable: true}), 'foo', {writable: true})"); 90 shouldBeUndefined("Object.defineProperty(Object.defineProperty({}, 'foo', {set: setter, configurable: true}), 'foo', {writable: true}).foo"); 91 shouldThrow("Object.defineProperty({}, 'foo', {get: getter}).foo", "'called getter'"); 92 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {get: getter}), 'foo', {get: getter1})"); 93 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {get: getter}), 'foo', {set: setter1})"); 94 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {get: getter, configurable: true}), 'foo', {get: getter1}).foo", "'called getter1'"); 95 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {get: getter, configurable: true}), 'foo', {set: setter1}).foo='test'", "'called setter1'"); 96 shouldBeTrue("Object.defineProperty(Object.defineProperty({}, 'foo', {get: getter, configurable: true}), 'foo', {value: true}).foo"); 97 shouldBeUndefined("Object.defineProperty(Object.defineProperty({}, 'foo', {get: getter, configurable: true}), 'foo', {writable: true}).foo"); 98 shouldBeTrue("'foo' in Object.defineProperty(Object.defineProperty({}, 'foo', {get: getter, configurable: true}), 'foo', {writable: true})"); 99 100 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1}), 'foo', {set: setter1})"); 101 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1, configurable: true}), 'foo', {set: setter1}).foo='test'", "'called setter1'"); 102 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1}), 'foo', {get: getter1})"); 103 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1}), 'foo', {set: setter1})"); 104 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1, configurable: true}), 'foo', {get: getter1}).foo", "'called getter1'"); 105 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1, configurable: true}), 'foo', {set: setter1}).foo='test'", "'called setter1'"); 106 107 // Should be able to redefine an non-writable property, if it is configurable. 108 shouldBe("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1, configurable: true, writable: false}), 'foo', {value: 2, configurable: true, writable: true}).foo", "2"); 109 shouldBe("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1, configurable: true, writable: false}), 'foo', {value: 2, configurable: true, writable: false}).foo", "2"); 110 111 // Should be able to redefine an non-writable, non-configurable property, with the same value and attributes. 112 shouldBe("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1, configurable: false, writable: false}), 'foo', {value: 1, configurable: false, writable: false}).foo", "1"); 113 114 // Should be able to redefine a configurable accessor, with the same or with different attributes. 115 // Check the accessor function changed. 116 shouldBe("Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return 1; }, configurable: true, enumerable: true}), 'foo', {get: function() { return 2; }, configurable: true, enumerable: false}).foo", "2"); 117 shouldBe("Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return 1; }, configurable: true, enumerable: false}), 'foo', {get: function() { return 2; }, configurable: true, enumerable: false}).foo", "2"); 118 // Check the attributes changed. 119 shouldBeFalse("var result = false; var o = Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return 1; }, configurable: true, enumerable: true}), 'foo', {get: function() { return 2; }, configurable: true, enumerable: false}); for (x in o) result = true; result"); 120 shouldBeTrue("var result = false; var o = Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return 1; }, configurable: true, enumerable: false}), 'foo', {get: function() { return 2; }, configurable: true, enumerable: true}); for (x in o) result = true; result"); 121 122 // Should be able to define an non-configurable accessor. 123 shouldBeUndefined("var o = Object.defineProperty({}, 'foo', {get: function() { return 1; }, configurable: true}); delete o.foo; o.foo"); 124 shouldBe("var o = Object.defineProperty({}, 'foo', {get: function() { return 1; }, configurable: false}); delete o.foo; o.foo", '1'); 125 shouldBe("Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return 1; }, configurable: true}), 'foo', {value:2}).foo", "2"); 126 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return 1; }, configurable: false}), 'foo', {value:2}).foo"); 127 128 // Defining a data descriptor over an accessor should result in a read only property. 129 shouldBe("var o = Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return 1; }, configurable: true}), 'foo', {value:2}); o.foo = 3; o.foo", "2"); 130 131 // Trying to redefine a non-configurable property as configurable should throw. 132 shouldThrow("Object.defineProperty(Object.defineProperty({}, 'foo', {value: 1}), 'foo', {value:2, configurable: true})"); 133 shouldThrow("Object.defineProperty(Object.defineProperty([], 'foo', {value: 1}), 'foo', {value:2, configurable: true})"); 134 135 // Test an object with a getter setter. 136 // Either accessor may be omitted or replaced with undefined, or both may be replaced with undefined. 137 shouldBe("var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}); o.foo", '42') 138 shouldBe("var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}); o.foo = 42; o.result;", '42'); 139 shouldBe("var o = Object.defineProperty({}, 'foo', {get:undefined, set:function(x){this.result = x;}}); o.foo", 'undefined') 140 shouldBe("var o = Object.defineProperty({}, 'foo', {get:undefined, set:function(x){this.result = x;}}); o.foo = 42; o.result;", '42'); 141 shouldBe("var o = Object.defineProperty({}, 'foo', {set:function(x){this.result = x;}}); o.foo", 'undefined') 142 shouldBe("var o = Object.defineProperty({}, 'foo', {set:function(x){this.result = x;}}); o.foo = 42; o.result;", '42'); 143 shouldBe("var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}, set:undefined}); o.foo", '42') 144 shouldBe("var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}, set:undefined}); o.foo = 42; o.result;", 'undefined'); 145 shouldBe("var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}}); o.foo", '42') 146 shouldBe("var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}}); o.foo = 42; o.result;", 'undefined'); 147 shouldBe("var o = Object.defineProperty({}, 'foo', {get:undefined, set:undefined}); o.foo", 'undefined') 148 shouldBe("var o = Object.defineProperty({}, 'foo', {get:undefined, set:undefined}); o.foo = 42; o.result;", 'undefined'); 149 // Test replacing or removing either the getter or setter individually. 150 shouldBe("var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {get:function(){return 13;}}); o.foo", '13') 151 shouldBe("var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {get:function(){return 13;}}); o.foo = 42; o.result;", '42') 152 shouldBe("var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {get:undefined}); o.foo", 'undefined') 153 shouldBe("var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {get:undefined}); o.foo = 42; o.result;", '42') 154 shouldBe("var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {set:function(){this.result = 13;}}); o.foo", '42') 155 shouldBe("var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {set:function(){this.result = 13;}}); o.foo = 42; o.result;", '13') 156 shouldBe("var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {set:undefined}); o.foo", '42') 157 shouldBe("var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {set:undefined}); o.foo = 42; o.result;", 'undefined') 158 159 // Repeat of the above, in strict mode. 160 // Either accessor may be omitted or replaced with undefined, or both may be replaced with undefined. 161 shouldBe("'use strict'; var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}); o.foo", '42') 162 shouldBe("'use strict'; var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}); o.foo = 42; o.result;", '42'); 163 shouldBe("'use strict'; var o = Object.defineProperty({}, 'foo', {get:undefined, set:function(x){this.result = x;}}); o.foo", 'undefined') 164 shouldBe("'use strict'; var o = Object.defineProperty({}, 'foo', {get:undefined, set:function(x){this.result = x;}}); o.foo = 42; o.result;", '42'); 165 shouldBe("'use strict'; var o = Object.defineProperty({}, 'foo', {set:function(x){this.result = x;}}); o.foo", 'undefined') 166 shouldBe("'use strict'; var o = Object.defineProperty({}, 'foo', {set:function(x){this.result = x;}}); o.foo = 42; o.result;", '42'); 167 shouldBe("'use strict'; var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}, set:undefined}); o.foo", '42') 168 shouldThrow("'use strict'; var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}, set:undefined}); o.foo = 42; o.result;"); 169 shouldBe("'use strict'; var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}}); o.foo", '42') 170 shouldThrow("'use strict'; var o = Object.defineProperty({}, 'foo', {get:function(){return 42;}}); o.foo = 42; o.result;"); 171 shouldBe("'use strict'; var o = Object.defineProperty({}, 'foo', {get:undefined, set:undefined}); o.foo", 'undefined') 172 shouldThrow("'use strict'; var o = Object.defineProperty({}, 'foo', {get:undefined, set:undefined}); o.foo = 42; o.result;"); 173 // Test replacing or removing either the getter or setter individually. 174 shouldBe("'use strict'; var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {get:function(){return 13;}}); o.foo", '13') 175 shouldBe("'use strict'; var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {get:function(){return 13;}}); o.foo = 42; o.result;", '42') 176 shouldBe("'use strict'; var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {get:undefined}); o.foo", 'undefined') 177 shouldBe("'use strict'; var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {get:undefined}); o.foo = 42; o.result;", '42') 178 shouldBe("'use strict'; var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {set:function(){this.result = 13;}}); o.foo", '42') 179 shouldBe("'use strict'; var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {set:function(){this.result = 13;}}); o.foo = 42; o.result;", '13') 180 shouldBe("'use strict'; var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {set:undefined}); o.foo", '42') 181 shouldThrow("'use strict'; var o = Object.defineProperty(Object.defineProperty({foo:1}, 'foo', {get:function(){return 42;}, set:function(x){this.result = x;}}), 'foo', {set:undefined}); o.foo = 42; o.result;") 182 183 Object.defineProperty(Object.prototype, 0, {get:function(){ return false; }, configurable:true}) 184 shouldBeTrue("0 in Object.prototype"); 185 shouldBeTrue("'0' in Object.prototype"); 186 delete Object.prototype[0]; 187 188 Object.defineProperty(Object.prototype, 'readOnly', {value:true, configurable:true, writable:false}) 189 shouldBeTrue("var o = {}; o.readOnly = false; o.readOnly"); 190 shouldThrow("'use strict'; var o = {}; o.readOnly = false; o.readOnly"); 191 delete Object.prototype.readOnly; 192 193 // Check the writable attribute is set correctly when redefining an accessor as a data descriptor. 194 shouldBeFalse("Object.getOwnPropertyDescriptor(Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return false; }, configurable: true}), 'foo', {value:false}), 'foo').writable"); 195 shouldBeFalse("Object.getOwnPropertyDescriptor(Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return false; }, configurable: true}), 'foo', {value:false, writable: false}), 'foo').writable"); 196 shouldBeTrue("Object.getOwnPropertyDescriptor(Object.defineProperty(Object.defineProperty({}, 'foo', {get: function() { return false; }, configurable: true}), 'foo', {value:false, writable: true}), 'foo').writable"); 197 198 // If array length is read-only, [[Put]] should fail. 199 shouldBeFalse("var a = Object.defineProperty([], 'length', {writable: false}); a[0] = 42; 0 in a;"); 200 shouldThrow("'use strict'; var a = Object.defineProperty([], 'length', {writable: false}); a[0] = 42; 0 in a;"); 201 202 // If array property is read-only, [[Put]] should fail. 203 shouldBe("var a = Object.defineProperty([42], '0', {writable: false}); a[0] = false; a[0];", '42'); 204 shouldThrow("'use strict'; var a = Object.defineProperty([42], '0', {writable: false}); a[0] = false; a[0];"); 205 206 // If array property is an undefined setter, [[Put]] should fail. 207 shouldBeUndefined("var a = Object.defineProperty([], '0', {set: undefined}); a[0] = 42; a[0];"); 208 shouldThrow("'use strict'; var a = Object.defineProperty([], '0', {set: undefined}); a[0] = 42; a[0];"); 209 210 function testObject() 211 { 212 // Test case from https://bugs.webkit.org/show_bug.cgi?id=38636 213 Object.defineProperty(anObj, 'slot1', {value: 'foo', enumerable: true}); 214 Object.defineProperty(anObj, 'slot2', {value: 'bar', writable: true}); 215 Object.defineProperty(anObj, 'slot3', {value: 'baz', enumerable: false}); 216 Object.defineProperty(anObj, 'slot4', {value: 'goo', configurable: false}); 217 shouldBe("anObj.slot1", '"foo"'); 218 shouldBe("anObj.slot2", '"bar"'); 219 anObj.slot2 = 'bad value'; 220 shouldBeTrue("anObj.propertyIsEnumerable('slot1')"); 221 shouldBeFalse("anObj.propertyIsEnumerable('slot2')"); 222 delete anObj.slot4; 223 shouldBe("anObj.slot4", '"goo"'); 224 225 // Test case from https://bugs.webkit.org/show_bug.cgi?id=48911 226 Object.defineProperty(Object.getPrototypeOf(anObj), 'slot5', {get: function() { return this._Slot5; }, set: function(v) { this._Slot5 = v; }, configurable: false}); 227 anObj.slot5 = 123; 228 shouldBe("anObj.slot5", '123'); 229 shouldBe("anObj._Slot5", '123'); 230 shouldBeUndefined("Object.getOwnPropertyDescriptor(anObj, 'slot5')"); 231 Object.defineProperty(anObj, 'slot5', { value: 456 }); 232 shouldBe("anObj.slot5", '456'); 233 shouldBe("anObj._Slot5", '123'); 234 shouldBe("Object.getOwnPropertyDescriptor(anObj, 'slot5').value", '456'); 235 } 236 var anObj = {}; 237 testObject(); 238 var anObj = this; 239 testObject(); 240
