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// Flags: --allow-natives-syntax --noalways-opt 32 33// Test that we throw an error if an object is not passed as argument. 34var non_objects = new Array(undefined, null, 1, -1, 0, 42.43); 35for (var key in non_objects) { 36 var exception = false; 37 try { 38 Object.seal(non_objects[key]); 39 } catch(e) { 40 exception = true; 41 assertTrue(/Object.seal called on non-object/.test(e)); 42 } 43 assertTrue(exception); 44} 45 46for (var key in non_objects) { 47 exception = false; 48 try { 49 Object.isSealed(non_objects[key]); 50 } catch(e) { 51 exception = true; 52 assertTrue(/Object.isSealed called on non-object/.test(e)); 53 } 54 assertTrue(exception); 55} 56 57// Test normal data properties. 58var obj = { x: 42, z: 'foobar' }; 59var desc = Object.getOwnPropertyDescriptor(obj, 'x'); 60assertTrue(desc.writable); 61assertTrue(desc.configurable); 62assertEquals(42, desc.value); 63 64desc = Object.getOwnPropertyDescriptor(obj, 'z'); 65assertTrue(desc.writable); 66assertTrue(desc.configurable); 67assertEquals('foobar', desc.value); 68 69assertTrue(Object.isExtensible(obj)); 70assertFalse(Object.isSealed(obj)); 71 72Object.seal(obj); 73 74// Make sure we are no longer extensible. 75assertFalse(Object.isExtensible(obj)); 76assertTrue(Object.isSealed(obj)); 77 78// We should not be frozen, since we are still able to 79// update values. 80assertFalse(Object.isFrozen(obj)); 81 82// We should not allow new properties to be added. 83obj.foo = 42; 84assertEquals(obj.foo, undefined); 85 86desc = Object.getOwnPropertyDescriptor(obj, 'x'); 87assertTrue(desc.writable); 88assertFalse(desc.configurable); 89assertEquals(42, desc.value); 90 91desc = Object.getOwnPropertyDescriptor(obj, 'z'); 92assertTrue(desc.writable); 93assertFalse(desc.configurable); 94assertEquals("foobar", desc.value); 95 96// Since writable is not affected by seal we should still be able to 97// update the values. 98obj.x = "43"; 99assertEquals("43", obj.x); 100 101// Test on accessors. 102var obj2 = {}; 103function get() { return 43; }; 104function set() {}; 105Object.defineProperty(obj2, 'x', { get: get, set: set, configurable: true }); 106 107desc = Object.getOwnPropertyDescriptor(obj2, 'x'); 108assertTrue(desc.configurable); 109assertEquals(undefined, desc.value); 110assertEquals(set, desc.set); 111assertEquals(get, desc.get); 112 113assertTrue(Object.isExtensible(obj2)); 114assertFalse(Object.isSealed(obj2)); 115Object.seal(obj2); 116 117// Since this is an accessor property the object is now effectively both 118// sealed and frozen (accessors has no writable attribute). 119assertTrue(Object.isFrozen(obj2)); 120assertFalse(Object.isExtensible(obj2)); 121assertTrue(Object.isSealed(obj2)); 122 123desc = Object.getOwnPropertyDescriptor(obj2, 'x'); 124assertFalse(desc.configurable); 125assertEquals(undefined, desc.value); 126assertEquals(set, desc.set); 127assertEquals(get, desc.get); 128 129obj2.foo = 42; 130assertEquals(obj2.foo, undefined); 131 132// Test seal on arrays. 133var arr = new Array(42,43); 134 135desc = Object.getOwnPropertyDescriptor(arr, '0'); 136assertTrue(desc.configurable); 137assertTrue(desc.writable); 138assertEquals(42, desc.value); 139 140desc = Object.getOwnPropertyDescriptor(arr, '1'); 141assertTrue(desc.configurable); 142assertTrue(desc.writable); 143assertEquals(43, desc.value); 144 145assertTrue(Object.isExtensible(arr)); 146assertFalse(Object.isSealed(arr)); 147Object.seal(arr); 148assertTrue(Object.isSealed(arr)); 149assertFalse(Object.isExtensible(arr)); 150// Since the values in the array is still writable this object 151// is not frozen. 152assertFalse(Object.isFrozen(arr)); 153 154desc = Object.getOwnPropertyDescriptor(arr, '0'); 155assertFalse(desc.configurable); 156assertTrue(desc.writable); 157assertEquals(42, desc.value); 158 159desc = Object.getOwnPropertyDescriptor(arr, '1'); 160assertFalse(desc.configurable); 161assertTrue(desc.writable); 162assertEquals(43, desc.value); 163 164arr[0] = 'foo'; 165 166// We should be able to overwrite the existing value. 167assertEquals('foo', arr[0]); 168 169 170// Test that isSealed returns the correct value even if configurable 171// has been set to false on all properties manually and the extensible 172// flag has also been set to false manually. 173var obj3 = { x: 42, y: 'foo' }; 174 175assertFalse(Object.isFrozen(obj3)); 176 177Object.defineProperty(obj3, 'x', {configurable: false, writable: true}); 178Object.defineProperty(obj3, 'y', {configurable: false, writable: false}); 179Object.preventExtensions(obj3); 180 181assertTrue(Object.isSealed(obj3)); 182 183 184// Make sure that an object that has a configurable property 185// is not classified as sealed. 186var obj4 = {}; 187Object.defineProperty(obj4, 'x', {configurable: true, writable: false}); 188Object.defineProperty(obj4, 'y', {configurable: false, writable: false}); 189Object.preventExtensions(obj4); 190 191assertFalse(Object.isSealed(obj4)); 192 193// Make sure that Object.seal returns the sealed object. 194var obj4 = {}; 195assertTrue(obj4 === Object.seal(obj4)); 196 197// 198// Test that built-in array functions can't modify a sealed array. 199// 200obj = [1, 2, 3]; 201var objControl = [4, 5, 6]; 202 203// Allow these functions to set up monomorphic calls, using custom built-ins. 204var push_call = function(a) { a.push(10); return a; } 205var pop_call = function(a) { return a.pop(); } 206for (var i = 0; i < 3; i++) { 207 push_call(obj); 208 pop_call(obj); 209} 210 211Object.seal(obj); 212assertThrows(function() { push_call(obj); }, TypeError); 213assertThrows(function() { pop_call(obj); }, TypeError); 214 215// But the control object is fine at these sites. 216assertDoesNotThrow(function() { push_call(objControl); }); 217assertDoesNotThrow(function() { pop_call(objControl); }); 218 219assertDoesNotThrow(function() { obj.push(); }); 220assertThrows(function() { obj.push(3); }, TypeError); 221assertThrows(function() { obj.pop(); }, TypeError); 222assertThrows(function() { obj.shift(3); }, TypeError); 223assertDoesNotThrow(function() { obj.unshift(); }); 224assertThrows(function() { obj.unshift(1); }, TypeError); 225assertThrows(function() { obj.splice(0, 0, 100, 101, 102); }, TypeError); 226assertDoesNotThrow(function() { obj.splice(0,0); }); 227 228assertDoesNotThrow(function() { objControl.push(3); }); 229assertDoesNotThrow(function() { objControl.pop(); }); 230assertDoesNotThrow(function() { objControl.shift(3); }); 231assertDoesNotThrow(function() { objControl.unshift(); }); 232assertDoesNotThrow(function() { objControl.splice(0, 0, 100, 101, 102); }); 233 234// Verify that crankshaft still does the right thing. 235obj = [1, 2, 3]; 236 237push_call = function(a) { a.push(1000); return a; } 238// Include a call site that doesn't have a custom built-in. 239var shift_call = function(a) { a.shift(1000); return a; } 240for (var i = 0; i < 3; i++) { 241 push_call(obj); 242 shift_call(obj); 243} 244 245%OptimizeFunctionOnNextCall(push_call); 246%OptimizeFunctionOnNextCall(shift_call); 247push_call(obj); 248shift_call(obj); 249assertOptimized(push_call); 250assertOptimized(shift_call); 251Object.seal(obj); 252assertThrows(function() { push_call(obj); }, TypeError); 253assertThrows(function() { shift_call(obj); }, TypeError); 254assertUnoptimized(push_call); 255assertUnoptimized(shift_call); 256assertDoesNotThrow(function() { push_call(objControl); }); 257assertDoesNotThrow(function() { shift_call(objControl); }); 258 259// Verify special behavior of splice on sealed objects. 260obj = [1,2,3]; 261Object.seal(obj); 262assertDoesNotThrow(function() { obj.splice(0,1,100); }); 263assertEquals(100, obj[0]); 264assertDoesNotThrow(function() { obj.splice(0,2,1,2); }); 265assertDoesNotThrow(function() { obj.splice(1,2,1,2); }); 266// Count of items to delete is clamped by length. 267assertDoesNotThrow(function() { obj.splice(1,2000,1,2); }); 268assertThrows(function() { obj.splice(0,0,1); }, TypeError); 269assertThrows(function() { obj.splice(1,2000,1,2,3); }, TypeError); 270