1// Copyright 2010 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// Tests the Object.seal and Object.isSealed methods - ES 15.2.3.9 and 29// ES 15.2.3.12 30 31 32// Test that we throw an error if an object is not passed as argument. 33var non_objects = new Array(undefined, null, 1, -1, 0, 42.43); 34for (var key in non_objects) { 35 var exception = false; 36 try { 37 Object.seal(non_objects[key]); 38 } catch(e) { 39 exception = true; 40 assertTrue(/Object.seal called on non-object/.test(e)); 41 } 42 assertTrue(exception); 43} 44 45for (var key in non_objects) { 46 exception = false; 47 try { 48 Object.isSealed(non_objects[key]); 49 } catch(e) { 50 exception = true; 51 assertTrue(/Object.isSealed called on non-object/.test(e)); 52 } 53 assertTrue(exception); 54} 55 56// Test normal data properties. 57var obj = { x: 42, z: 'foobar' }; 58var desc = Object.getOwnPropertyDescriptor(obj, 'x'); 59assertTrue(desc.writable); 60assertTrue(desc.configurable); 61assertEquals(42, desc.value); 62 63desc = Object.getOwnPropertyDescriptor(obj, 'z'); 64assertTrue(desc.writable); 65assertTrue(desc.configurable); 66assertEquals('foobar', desc.value); 67 68assertTrue(Object.isExtensible(obj)); 69assertFalse(Object.isSealed(obj)); 70 71Object.seal(obj); 72 73// Make sure we are no longer extensible. 74assertFalse(Object.isExtensible(obj)); 75assertTrue(Object.isSealed(obj)); 76 77// We should not be frozen, since we are still able to 78// update values. 79assertFalse(Object.isFrozen(obj)); 80 81// We should not allow new properties to be added. 82obj.foo = 42; 83assertEquals(obj.foo, undefined); 84 85desc = Object.getOwnPropertyDescriptor(obj, 'x'); 86assertTrue(desc.writable); 87assertFalse(desc.configurable); 88assertEquals(42, desc.value); 89 90desc = Object.getOwnPropertyDescriptor(obj, 'z'); 91assertTrue(desc.writable); 92assertFalse(desc.configurable); 93assertEquals("foobar", desc.value); 94 95// Since writable is not affected by seal we should still be able to 96// update the values. 97obj.x = "43"; 98assertEquals("43", obj.x); 99 100// Test on accessors. 101var obj2 = {}; 102function get() { return 43; }; 103function set() {}; 104Object.defineProperty(obj2, 'x', { get: get, set: set, configurable: true }); 105 106desc = Object.getOwnPropertyDescriptor(obj2, 'x'); 107assertTrue(desc.configurable); 108assertEquals(undefined, desc.value); 109assertEquals(set, desc.set); 110assertEquals(get, desc.get); 111 112assertTrue(Object.isExtensible(obj2)); 113assertFalse(Object.isSealed(obj2)); 114Object.seal(obj2); 115 116// Since this is an accessor property the object is now effectively both 117// sealed and frozen (accessors has no writable attribute). 118assertTrue(Object.isFrozen(obj2)); 119assertFalse(Object.isExtensible(obj2)); 120assertTrue(Object.isSealed(obj2)); 121 122desc = Object.getOwnPropertyDescriptor(obj2, 'x'); 123assertFalse(desc.configurable); 124assertEquals(undefined, desc.value); 125assertEquals(set, desc.set); 126assertEquals(get, desc.get); 127 128obj2.foo = 42; 129assertEquals(obj2.foo, undefined); 130 131// Test seal on arrays. 132var arr = new Array(42,43); 133 134desc = Object.getOwnPropertyDescriptor(arr, '0'); 135assertTrue(desc.configurable); 136assertTrue(desc.writable); 137assertEquals(42, desc.value); 138 139desc = Object.getOwnPropertyDescriptor(arr, '1'); 140assertTrue(desc.configurable); 141assertTrue(desc.writable); 142assertEquals(43, desc.value); 143 144assertTrue(Object.isExtensible(arr)); 145assertFalse(Object.isSealed(arr)); 146Object.seal(arr); 147assertTrue(Object.isSealed(arr)); 148assertFalse(Object.isExtensible(arr)); 149// Since the values in the array is still writable this object 150// is not frozen. 151assertFalse(Object.isFrozen(arr)); 152 153desc = Object.getOwnPropertyDescriptor(arr, '0'); 154assertFalse(desc.configurable); 155assertTrue(desc.writable); 156assertEquals(42, desc.value); 157 158desc = Object.getOwnPropertyDescriptor(arr, '1'); 159assertFalse(desc.configurable); 160assertTrue(desc.writable); 161assertEquals(43, desc.value); 162 163arr[0] = 'foo'; 164 165// We should be able to overwrite the existing value. 166assertEquals('foo', arr[0]); 167 168 169// Test that isSealed returns the correct value even if configurable 170// has been set to false on all properties manually and the extensible 171// flag has also been set to false manually. 172var obj3 = { x: 42, y: 'foo' }; 173 174assertFalse(Object.isFrozen(obj3)); 175 176Object.defineProperty(obj3, 'x', {configurable: false, writable: true}); 177Object.defineProperty(obj3, 'y', {configurable: false, writable: false}); 178Object.preventExtensions(obj3); 179 180assertTrue(Object.isSealed(obj3)); 181 182 183// Make sure that an object that has a configurable property 184// is not classified as sealed. 185var obj4 = {}; 186Object.defineProperty(obj4, 'x', {configurable: true, writable: false}); 187Object.defineProperty(obj4, 'y', {configurable: false, writable: false}); 188Object.preventExtensions(obj4); 189 190assertFalse(Object.isSealed(obj4)); 191 192// Make sure that Object.seal returns the sealed object. 193var obj4 = {}; 194assertTrue(obj4 === Object.seal(obj4)); 195