erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 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.defineProperty method - ES 15.2.3.6 |
| 29 | |
svenpanne@chromium.org | 619781a | 2012-07-05 08:22:44 +0000 | [diff] [blame^] | 30 | // Flags: --allow-natives-syntax --es5-readonly |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 31 | |
| 32 | // Check that an exception is thrown when null is passed as object. |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 33 | var exception = false; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 34 | try { |
| 35 | Object.defineProperty(null, null, null); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 36 | } catch (e) { |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 37 | exception = true; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 38 | assertTrue(/called on non-object/.test(e)); |
| 39 | } |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 40 | assertTrue(exception); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 41 | |
| 42 | // Check that an exception is thrown when undefined is passed as object. |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 43 | exception = false; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 44 | try { |
| 45 | Object.defineProperty(undefined, undefined, undefined); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 46 | } catch (e) { |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 47 | exception = true; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 48 | assertTrue(/called on non-object/.test(e)); |
| 49 | } |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 50 | assertTrue(exception); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 51 | |
| 52 | // Check that an exception is thrown when non-object is passed as object. |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 53 | exception = false; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 54 | try { |
| 55 | Object.defineProperty(0, "foo", undefined); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 56 | } catch (e) { |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 57 | exception = true; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 58 | assertTrue(/called on non-object/.test(e)); |
| 59 | } |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 60 | assertTrue(exception); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 61 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 62 | // Object. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 63 | var obj1 = {}; |
| 64 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 65 | // Values. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 66 | var val1 = 0; |
| 67 | var val2 = 0; |
| 68 | var val3 = 0; |
| 69 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 70 | function setter1() {val1++; } |
| 71 | function getter1() {return val1; } |
| 72 | |
| 73 | function setter2() {val2++; } |
| 74 | function getter2() {return val2; } |
| 75 | |
| 76 | function setter3() {val3++; } |
| 77 | function getter3() {return val3; } |
| 78 | |
| 79 | |
| 80 | // Descriptors. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 81 | var emptyDesc = {}; |
| 82 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 83 | var accessorConfigurable = { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 84 | set: setter1, |
| 85 | get: getter1, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 86 | configurable: true |
| 87 | }; |
| 88 | |
| 89 | var accessorNoConfigurable = { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 90 | set: setter2, |
| 91 | get: getter2, |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 92 | configurable: false |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 93 | }; |
| 94 | |
| 95 | var accessorOnlySet = { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 96 | set: setter3, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 97 | configurable: true |
| 98 | }; |
| 99 | |
| 100 | var accessorOnlyGet = { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 101 | get: getter3, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 102 | configurable: true |
| 103 | }; |
| 104 | |
| 105 | var accessorDefault = {set: function(){} }; |
| 106 | |
| 107 | var dataConfigurable = { value: 1000, configurable: true }; |
| 108 | |
| 109 | var dataNoConfigurable = { value: 2000, configurable: false }; |
| 110 | |
| 111 | var dataWritable = { value: 3000, writable: true}; |
| 112 | |
| 113 | |
| 114 | // Check that we can't add property with undefined attributes. |
| 115 | try { |
| 116 | Object.defineProperty(obj1, "foo", undefined); |
| 117 | assertTrue(false); |
| 118 | } catch (e) { |
| 119 | assertTrue(/must be an object/.test(e)); |
| 120 | } |
| 121 | |
| 122 | // Make sure that we can add a property with an empty descriptor and |
| 123 | // that it has the default descriptor values. |
| 124 | Object.defineProperty(obj1, "foo", emptyDesc); |
| 125 | |
| 126 | // foo should be undefined as it has no get, set or value |
| 127 | assertEquals(undefined, obj1.foo); |
| 128 | |
| 129 | // We should, however, be able to retrieve the propertydescriptor which should |
| 130 | // have all default values (according to 8.6.1). |
| 131 | var desc = Object.getOwnPropertyDescriptor(obj1, "foo"); |
| 132 | assertFalse(desc.configurable); |
| 133 | assertFalse(desc.enumerable); |
| 134 | assertFalse(desc.writable); |
| 135 | assertEquals(desc.get, undefined); |
| 136 | assertEquals(desc.set, undefined); |
| 137 | assertEquals(desc.value, undefined); |
| 138 | |
| 139 | // Make sure that getOwnPropertyDescriptor does not return a descriptor |
| 140 | // with default values if called with non existing property (otherwise |
| 141 | // the test above is invalid). |
| 142 | desc = Object.getOwnPropertyDescriptor(obj1, "bar"); |
| 143 | assertEquals(desc, undefined); |
| 144 | |
| 145 | // Make sure that foo can't be reset (as configurable is false). |
| 146 | try { |
| 147 | Object.defineProperty(obj1, "foo", accessorConfigurable); |
| 148 | } catch (e) { |
| 149 | assertTrue(/Cannot redefine property/.test(e)); |
| 150 | } |
| 151 | |
| 152 | |
| 153 | // Accessor properties |
| 154 | |
| 155 | Object.defineProperty(obj1, "bar", accessorConfigurable); |
| 156 | desc = Object.getOwnPropertyDescriptor(obj1, "bar"); |
| 157 | assertTrue(desc.configurable); |
| 158 | assertFalse(desc.enumerable); |
| 159 | assertEquals(desc.writable, undefined); |
| 160 | assertEquals(desc.get, accessorConfigurable.get); |
| 161 | assertEquals(desc.set, accessorConfigurable.set); |
| 162 | assertEquals(desc.value, undefined); |
| 163 | assertEquals(1, obj1.bar = 1); |
| 164 | assertEquals(1, val1); |
| 165 | assertEquals(1, obj1.bar = 1); |
| 166 | assertEquals(2, val1); |
| 167 | assertEquals(2, obj1.bar); |
| 168 | |
| 169 | // Redefine bar with non configurable test |
| 170 | Object.defineProperty(obj1, "bar", accessorNoConfigurable); |
| 171 | desc = Object.getOwnPropertyDescriptor(obj1, "bar"); |
| 172 | assertFalse(desc.configurable); |
| 173 | assertFalse(desc.enumerable); |
| 174 | assertEquals(desc.writable, undefined); |
| 175 | assertEquals(desc.get, accessorNoConfigurable.get); |
| 176 | assertEquals(desc.set, accessorNoConfigurable.set); |
| 177 | assertEquals(desc.value, undefined); |
| 178 | assertEquals(1, obj1.bar = 1); |
| 179 | assertEquals(2, val1); |
| 180 | assertEquals(1, val2); |
| 181 | assertEquals(1, obj1.bar = 1) |
| 182 | assertEquals(2, val1); |
| 183 | assertEquals(2, val2); |
| 184 | assertEquals(2, obj1.bar); |
| 185 | |
| 186 | // Try to redefine bar again - should fail as configurable is false. |
| 187 | try { |
| 188 | Object.defineProperty(obj1, "bar", accessorConfigurable); |
| 189 | assertTrue(false); |
| 190 | } catch(e) { |
| 191 | assertTrue(/Cannot redefine property/.test(e)); |
| 192 | } |
| 193 | |
| 194 | // Try to redefine bar again using the data descriptor - should fail. |
| 195 | try { |
| 196 | Object.defineProperty(obj1, "bar", dataConfigurable); |
| 197 | assertTrue(false); |
| 198 | } catch(e) { |
| 199 | assertTrue(/Cannot redefine property/.test(e)); |
| 200 | } |
| 201 | |
| 202 | // Redefine using same descriptor - should succeed. |
| 203 | Object.defineProperty(obj1, "bar", accessorNoConfigurable); |
| 204 | desc = Object.getOwnPropertyDescriptor(obj1, "bar"); |
| 205 | assertFalse(desc.configurable); |
| 206 | assertFalse(desc.enumerable); |
| 207 | assertEquals(desc.writable, undefined); |
| 208 | assertEquals(desc.get, accessorNoConfigurable.get); |
| 209 | assertEquals(desc.set, accessorNoConfigurable.set); |
| 210 | assertEquals(desc.value, undefined); |
| 211 | assertEquals(1, obj1.bar = 1); |
| 212 | assertEquals(2, val1); |
| 213 | assertEquals(3, val2); |
| 214 | assertEquals(1, obj1.bar = 1) |
| 215 | assertEquals(2, val1); |
| 216 | assertEquals(4, val2); |
| 217 | assertEquals(4, obj1.bar); |
| 218 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 219 | // Define an accessor that has only a setter. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 220 | Object.defineProperty(obj1, "setOnly", accessorOnlySet); |
| 221 | desc = Object.getOwnPropertyDescriptor(obj1, "setOnly"); |
| 222 | assertTrue(desc.configurable); |
| 223 | assertFalse(desc.enumerable); |
| 224 | assertEquals(desc.set, accessorOnlySet.set); |
| 225 | assertEquals(desc.writable, undefined); |
| 226 | assertEquals(desc.value, undefined); |
| 227 | assertEquals(desc.get, undefined); |
| 228 | assertEquals(1, obj1.setOnly = 1); |
| 229 | assertEquals(1, val3); |
| 230 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 231 | // Add a getter - should not touch the setter. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 232 | Object.defineProperty(obj1, "setOnly", accessorOnlyGet); |
| 233 | desc = Object.getOwnPropertyDescriptor(obj1, "setOnly"); |
| 234 | assertTrue(desc.configurable); |
| 235 | assertFalse(desc.enumerable); |
| 236 | assertEquals(desc.get, accessorOnlyGet.get); |
| 237 | assertEquals(desc.set, accessorOnlySet.set); |
| 238 | assertEquals(desc.writable, undefined); |
| 239 | assertEquals(desc.value, undefined); |
| 240 | assertEquals(1, obj1.setOnly = 1); |
| 241 | assertEquals(2, val3); |
| 242 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 243 | // The above should also work if redefining just a getter or setter on |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 244 | // an existing property with both a getter and a setter. |
| 245 | Object.defineProperty(obj1, "both", accessorConfigurable); |
| 246 | |
| 247 | Object.defineProperty(obj1, "both", accessorOnlySet); |
| 248 | desc = Object.getOwnPropertyDescriptor(obj1, "both"); |
| 249 | assertTrue(desc.configurable); |
| 250 | assertFalse(desc.enumerable); |
| 251 | assertEquals(desc.set, accessorOnlySet.set); |
| 252 | assertEquals(desc.get, accessorConfigurable.get); |
| 253 | assertEquals(desc.writable, undefined); |
| 254 | assertEquals(desc.value, undefined); |
| 255 | assertEquals(1, obj1.both = 1); |
| 256 | assertEquals(3, val3); |
| 257 | |
| 258 | |
| 259 | // Data properties |
| 260 | |
| 261 | Object.defineProperty(obj1, "foobar", dataConfigurable); |
| 262 | desc = Object.getOwnPropertyDescriptor(obj1, "foobar"); |
| 263 | assertEquals(obj1.foobar, 1000); |
| 264 | assertEquals(desc.value, 1000); |
| 265 | assertTrue(desc.configurable); |
| 266 | assertFalse(desc.writable); |
| 267 | assertFalse(desc.enumerable); |
| 268 | assertEquals(desc.get, undefined); |
| 269 | assertEquals(desc.set, undefined); |
| 270 | //Try writing to non writable attribute - should remain 1000 |
| 271 | obj1.foobar = 1001; |
| 272 | assertEquals(obj1.foobar, 1000); |
| 273 | |
| 274 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 275 | // Redefine to writable descriptor - now writing to foobar should be allowed. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 276 | Object.defineProperty(obj1, "foobar", dataWritable); |
| 277 | desc = Object.getOwnPropertyDescriptor(obj1, "foobar"); |
| 278 | assertEquals(obj1.foobar, 3000); |
| 279 | assertEquals(desc.value, 3000); |
| 280 | // Note that since dataWritable does not define configurable the configurable |
| 281 | // setting from the redefined property (in this case true) is used. |
| 282 | assertTrue(desc.configurable); |
| 283 | assertTrue(desc.writable); |
| 284 | assertFalse(desc.enumerable); |
| 285 | assertEquals(desc.get, undefined); |
| 286 | assertEquals(desc.set, undefined); |
| 287 | // Writing to the property should now be allowed |
| 288 | obj1.foobar = 1001; |
| 289 | assertEquals(obj1.foobar, 1001); |
| 290 | |
| 291 | |
| 292 | // Redefine with non configurable data property. |
| 293 | Object.defineProperty(obj1, "foobar", dataNoConfigurable); |
| 294 | desc = Object.getOwnPropertyDescriptor(obj1, "foobar"); |
| 295 | assertEquals(obj1.foobar, 2000); |
| 296 | assertEquals(desc.value, 2000); |
| 297 | assertFalse(desc.configurable); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 298 | assertTrue(desc.writable); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 299 | assertFalse(desc.enumerable); |
| 300 | assertEquals(desc.get, undefined); |
| 301 | assertEquals(desc.set, undefined); |
| 302 | |
| 303 | // Try redefine again - shold fail because configurable is now false. |
| 304 | try { |
| 305 | Object.defineProperty(obj1, "foobar", dataConfigurable); |
| 306 | assertTrue(false); |
| 307 | } catch (e) { |
| 308 | assertTrue(/Cannot redefine property/.test(e)); |
| 309 | } |
| 310 | |
| 311 | // Try redefine again with accessor property - shold also fail. |
| 312 | try { |
| 313 | Object.defineProperty(obj1, "foobar", dataConfigurable); |
| 314 | assertTrue(false); |
| 315 | } catch (e) { |
| 316 | assertTrue(/Cannot redefine property/.test(e)); |
| 317 | } |
| 318 | |
| 319 | |
| 320 | // Redifine with the same descriptor - should succeed (step 6). |
| 321 | Object.defineProperty(obj1, "foobar", dataNoConfigurable); |
| 322 | desc = Object.getOwnPropertyDescriptor(obj1, "foobar"); |
| 323 | assertEquals(obj1.foobar, 2000); |
| 324 | assertEquals(desc.value, 2000); |
| 325 | assertFalse(desc.configurable); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 326 | assertTrue(desc.writable); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 327 | assertFalse(desc.enumerable); |
| 328 | assertEquals(desc.get, undefined); |
| 329 | assertEquals(desc.set, undefined); |
| 330 | |
| 331 | |
| 332 | // New object |
| 333 | var obj2 = {}; |
| 334 | |
| 335 | // Make accessor - redefine to data |
| 336 | Object.defineProperty(obj2, "foo", accessorConfigurable); |
| 337 | |
| 338 | // Redefine to data property |
| 339 | Object.defineProperty(obj2, "foo", dataConfigurable); |
| 340 | desc = Object.getOwnPropertyDescriptor(obj2, "foo"); |
| 341 | assertEquals(obj2.foo, 1000); |
| 342 | assertEquals(desc.value, 1000); |
| 343 | assertTrue(desc.configurable); |
| 344 | assertFalse(desc.writable); |
| 345 | assertFalse(desc.enumerable); |
| 346 | assertEquals(desc.get, undefined); |
| 347 | assertEquals(desc.set, undefined); |
| 348 | |
| 349 | |
| 350 | // Redefine back to accessor |
| 351 | Object.defineProperty(obj2, "foo", accessorConfigurable); |
| 352 | desc = Object.getOwnPropertyDescriptor(obj2, "foo"); |
| 353 | assertTrue(desc.configurable); |
| 354 | assertFalse(desc.enumerable); |
| 355 | assertEquals(desc.writable, undefined); |
| 356 | assertEquals(desc.get, accessorConfigurable.get); |
| 357 | assertEquals(desc.set, accessorConfigurable.set); |
| 358 | assertEquals(desc.value, undefined); |
| 359 | assertEquals(1, obj2.foo = 1); |
| 360 | assertEquals(3, val1); |
| 361 | assertEquals(4, val2); |
| 362 | assertEquals(3, obj2.foo); |
| 363 | |
| 364 | // Make data - redefine to accessor |
| 365 | Object.defineProperty(obj2, "bar", dataConfigurable) |
| 366 | |
| 367 | // Redefine to accessor property |
| 368 | Object.defineProperty(obj2, "bar", accessorConfigurable); |
| 369 | desc = Object.getOwnPropertyDescriptor(obj2, "bar"); |
| 370 | assertTrue(desc.configurable); |
| 371 | assertFalse(desc.enumerable); |
| 372 | assertEquals(desc.writable, undefined); |
| 373 | assertEquals(desc.get, accessorConfigurable.get); |
| 374 | assertEquals(desc.set, accessorConfigurable.set); |
| 375 | assertEquals(desc.value, undefined); |
| 376 | assertEquals(1, obj2.bar = 1); |
| 377 | assertEquals(4, val1); |
| 378 | assertEquals(4, val2); |
| 379 | assertEquals(4, obj2.foo); |
| 380 | |
| 381 | // Redefine back to data property |
| 382 | Object.defineProperty(obj2, "bar", dataConfigurable); |
| 383 | desc = Object.getOwnPropertyDescriptor(obj2, "bar"); |
| 384 | assertEquals(obj2.bar, 1000); |
| 385 | assertEquals(desc.value, 1000); |
| 386 | assertTrue(desc.configurable); |
| 387 | assertFalse(desc.writable); |
| 388 | assertFalse(desc.enumerable); |
| 389 | assertEquals(desc.get, undefined); |
| 390 | assertEquals(desc.set, undefined); |
| 391 | |
| 392 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 393 | // Redefinition of an accessor defined using __defineGetter__ and |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 394 | // __defineSetter__. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 395 | function get(){return this.x} |
| 396 | function set(x){this.x=x}; |
| 397 | |
| 398 | var obj3 = {x:1000}; |
| 399 | obj3.__defineGetter__("foo", get); |
| 400 | obj3.__defineSetter__("foo", set); |
| 401 | |
| 402 | desc = Object.getOwnPropertyDescriptor(obj3, "foo"); |
| 403 | assertTrue(desc.configurable); |
| 404 | assertTrue(desc.enumerable); |
| 405 | assertEquals(desc.writable, undefined); |
| 406 | assertEquals(desc.get, get); |
| 407 | assertEquals(desc.set, set); |
| 408 | assertEquals(desc.value, undefined); |
| 409 | assertEquals(1, obj3.foo = 1); |
| 410 | assertEquals(1, obj3.x); |
| 411 | assertEquals(1, obj3.foo); |
| 412 | |
| 413 | // Redefine to accessor property (non configurable) - note that enumerable |
| 414 | // which we do not redefine should remain the same (true). |
| 415 | Object.defineProperty(obj3, "foo", accessorNoConfigurable); |
| 416 | desc = Object.getOwnPropertyDescriptor(obj3, "foo"); |
| 417 | assertFalse(desc.configurable); |
| 418 | assertTrue(desc.enumerable); |
| 419 | assertEquals(desc.writable, undefined); |
| 420 | assertEquals(desc.get, accessorNoConfigurable.get); |
| 421 | assertEquals(desc.set, accessorNoConfigurable.set); |
| 422 | assertEquals(desc.value, undefined); |
| 423 | assertEquals(1, obj3.foo = 1); |
| 424 | assertEquals(5, val2); |
| 425 | assertEquals(5, obj3.foo); |
| 426 | |
| 427 | |
| 428 | obj3.__defineGetter__("bar", get); |
| 429 | obj3.__defineSetter__("bar", set); |
| 430 | |
| 431 | |
| 432 | // Redefine back to data property |
| 433 | Object.defineProperty(obj3, "bar", dataConfigurable); |
| 434 | desc = Object.getOwnPropertyDescriptor(obj3, "bar"); |
| 435 | assertEquals(obj3.bar, 1000); |
| 436 | assertEquals(desc.value, 1000); |
| 437 | assertTrue(desc.configurable); |
| 438 | assertFalse(desc.writable); |
| 439 | assertTrue(desc.enumerable); |
| 440 | assertEquals(desc.get, undefined); |
| 441 | assertEquals(desc.set, undefined); |
| 442 | |
| 443 | |
| 444 | var obj4 = {}; |
| 445 | var func = function (){return 42;}; |
| 446 | obj4.bar = func; |
| 447 | assertEquals(42, obj4.bar()); |
| 448 | |
| 449 | Object.defineProperty(obj4, "bar", accessorConfigurable); |
| 450 | desc = Object.getOwnPropertyDescriptor(obj4, "bar"); |
| 451 | assertTrue(desc.configurable); |
| 452 | assertTrue(desc.enumerable); |
| 453 | assertEquals(desc.writable, undefined); |
| 454 | assertEquals(desc.get, accessorConfigurable.get); |
| 455 | assertEquals(desc.set, accessorConfigurable.set); |
| 456 | assertEquals(desc.value, undefined); |
| 457 | assertEquals(1, obj4.bar = 1); |
| 458 | assertEquals(5, val1); |
| 459 | assertEquals(5, obj4.bar); |
| 460 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 461 | // Make sure an error is thrown when trying to access to redefined function. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 462 | try { |
| 463 | obj4.bar(); |
| 464 | assertTrue(false); |
| 465 | } catch (e) { |
| 466 | assertTrue(/is not a function/.test(e)); |
| 467 | } |
| 468 | |
| 469 | |
| 470 | // Test runtime calls to DefineOrRedefineDataProperty and |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 471 | // DefineOrRedefineAccessorProperty - make sure we don't |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 472 | // crash. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 473 | try { |
| 474 | %DefineOrRedefineAccessorProperty(0, 0, 0, 0, 0); |
| 475 | } catch (e) { |
| 476 | assertTrue(/illegal access/.test(e)); |
| 477 | } |
| 478 | |
| 479 | try { |
| 480 | %DefineOrRedefineDataProperty(0, 0, 0, 0); |
| 481 | } catch (e) { |
| 482 | assertTrue(/illegal access/.test(e)); |
| 483 | } |
| 484 | |
| 485 | try { |
| 486 | %DefineOrRedefineDataProperty(null, null, null, null); |
| 487 | } catch (e) { |
| 488 | assertTrue(/illegal access/.test(e)); |
| 489 | } |
| 490 | |
| 491 | try { |
| 492 | %DefineOrRedefineAccessorProperty(null, null, null, null, null); |
| 493 | } catch (e) { |
| 494 | assertTrue(/illegal access/.test(e)); |
| 495 | } |
| 496 | |
| 497 | try { |
| 498 | %DefineOrRedefineDataProperty({}, null, null, null); |
| 499 | } catch (e) { |
| 500 | assertTrue(/illegal access/.test(e)); |
| 501 | } |
| 502 | |
| 503 | // Defining properties null should fail even when we have |
| 504 | // other allowed values |
| 505 | try { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 506 | %DefineOrRedefineAccessorProperty(null, 'foo', func, null, 0); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 507 | } catch (e) { |
| 508 | assertTrue(/illegal access/.test(e)); |
| 509 | } |
| 510 | |
| 511 | try { |
| 512 | %DefineOrRedefineDataProperty(null, 'foo', 0, 0); |
| 513 | } catch (e) { |
| 514 | assertTrue(/illegal access/.test(e)); |
| 515 | } |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 516 | |
| 517 | // Test that all possible differences in step 6 in DefineOwnProperty are |
| 518 | // exercised, i.e., any difference in the given property descriptor and the |
| 519 | // existing properties should not return true, but throw an error if the |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 520 | // existing configurable property is false. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 521 | |
| 522 | var obj5 = {}; |
| 523 | // Enumerable will default to false. |
| 524 | Object.defineProperty(obj5, 'foo', accessorNoConfigurable); |
| 525 | desc = Object.getOwnPropertyDescriptor(obj5, 'foo'); |
| 526 | // First, test that we are actually allowed to set the accessor if all |
| 527 | // values are of the descriptor are the same as the existing one. |
| 528 | Object.defineProperty(obj5, 'foo', accessorNoConfigurable); |
| 529 | |
| 530 | // Different setter. |
| 531 | var descDifferent = { |
| 532 | configurable:false, |
| 533 | enumerable:false, |
| 534 | set: setter1, |
| 535 | get: getter2 |
| 536 | }; |
| 537 | |
| 538 | try { |
| 539 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 540 | assertTrue(false); |
| 541 | } catch (e) { |
| 542 | assertTrue(/Cannot redefine property/.test(e)); |
| 543 | } |
| 544 | |
| 545 | // Different getter. |
| 546 | descDifferent = { |
| 547 | configurable:false, |
| 548 | enumerable:false, |
| 549 | set: setter2, |
| 550 | get: getter1 |
| 551 | }; |
| 552 | |
| 553 | try { |
| 554 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 555 | assertTrue(false); |
| 556 | } catch (e) { |
| 557 | assertTrue(/Cannot redefine property/.test(e)); |
| 558 | } |
| 559 | |
| 560 | // Different enumerable. |
| 561 | descDifferent = { |
| 562 | configurable:false, |
| 563 | enumerable:true, |
| 564 | set: setter2, |
| 565 | get: getter2 |
| 566 | }; |
| 567 | |
| 568 | try { |
| 569 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 570 | assertTrue(false); |
| 571 | } catch (e) { |
| 572 | assertTrue(/Cannot redefine property/.test(e)); |
| 573 | } |
| 574 | |
| 575 | // Different configurable. |
| 576 | descDifferent = { |
| 577 | configurable:false, |
| 578 | enumerable:true, |
| 579 | set: setter2, |
| 580 | get: getter2 |
| 581 | }; |
| 582 | |
| 583 | try { |
| 584 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 585 | assertTrue(false); |
| 586 | } catch (e) { |
| 587 | assertTrue(/Cannot redefine property/.test(e)); |
| 588 | } |
| 589 | |
| 590 | // No difference. |
| 591 | descDifferent = { |
| 592 | configurable:false, |
| 593 | enumerable:false, |
| 594 | set: setter2, |
| 595 | get: getter2 |
| 596 | }; |
| 597 | // Make sure we can still redefine if all properties are the same. |
| 598 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 599 | |
| 600 | // Make sure that obj5 still holds the original values. |
| 601 | desc = Object.getOwnPropertyDescriptor(obj5, 'foo'); |
| 602 | assertEquals(desc.get, getter2); |
| 603 | assertEquals(desc.set, setter2); |
| 604 | assertFalse(desc.enumerable); |
| 605 | assertFalse(desc.configurable); |
| 606 | |
| 607 | |
| 608 | // Also exercise step 6 on data property, writable and enumerable |
| 609 | // defaults to false. |
| 610 | Object.defineProperty(obj5, 'bar', dataNoConfigurable); |
| 611 | |
| 612 | // Test that redefinition with the same property descriptor is possible |
| 613 | Object.defineProperty(obj5, 'bar', dataNoConfigurable); |
| 614 | |
| 615 | // Different value. |
| 616 | descDifferent = { |
| 617 | configurable:false, |
| 618 | enumerable:false, |
| 619 | writable: false, |
| 620 | value: 1999 |
| 621 | }; |
| 622 | |
| 623 | try { |
| 624 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 625 | assertTrue(false); |
| 626 | } catch (e) { |
| 627 | assertTrue(/Cannot redefine property/.test(e)); |
| 628 | } |
| 629 | |
| 630 | // Different writable. |
| 631 | descDifferent = { |
| 632 | configurable:false, |
| 633 | enumerable:false, |
| 634 | writable: true, |
| 635 | value: 2000 |
| 636 | }; |
| 637 | |
| 638 | try { |
| 639 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 640 | assertTrue(false); |
| 641 | } catch (e) { |
| 642 | assertTrue(/Cannot redefine property/.test(e)); |
| 643 | } |
| 644 | |
| 645 | |
| 646 | // Different enumerable. |
| 647 | descDifferent = { |
| 648 | configurable:false, |
| 649 | enumerable:true , |
| 650 | writable:false, |
| 651 | value: 2000 |
| 652 | }; |
| 653 | |
| 654 | try { |
| 655 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 656 | assertTrue(false); |
| 657 | } catch (e) { |
| 658 | assertTrue(/Cannot redefine property/.test(e)); |
| 659 | } |
| 660 | |
| 661 | |
| 662 | // Different configurable. |
| 663 | descDifferent = { |
| 664 | configurable:true, |
| 665 | enumerable:false, |
| 666 | writable:false, |
| 667 | value: 2000 |
| 668 | }; |
| 669 | |
| 670 | try { |
| 671 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 672 | assertTrue(false); |
| 673 | } catch (e) { |
| 674 | assertTrue(/Cannot redefine property/.test(e)); |
| 675 | } |
| 676 | |
| 677 | // No difference. |
| 678 | descDifferent = { |
| 679 | configurable:false, |
| 680 | enumerable:false, |
| 681 | writable:false, |
| 682 | value:2000 |
| 683 | }; |
| 684 | // Make sure we can still redefine if all properties are the same. |
| 685 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 686 | |
| 687 | // Make sure that obj5 still holds the original values. |
| 688 | desc = Object.getOwnPropertyDescriptor(obj5, 'bar'); |
| 689 | assertEquals(desc.value, 2000); |
| 690 | assertFalse(desc.writable); |
| 691 | assertFalse(desc.enumerable); |
| 692 | assertFalse(desc.configurable); |
| 693 | |
| 694 | |
| 695 | // Make sure that we can't overwrite +0 with -0 and vice versa. |
| 696 | var descMinusZero = {value: -0, configurable: false}; |
| 697 | var descPlusZero = {value: +0, configurable: false}; |
| 698 | |
| 699 | Object.defineProperty(obj5, 'minuszero', descMinusZero); |
| 700 | |
| 701 | // Make sure we can redefine with -0. |
| 702 | Object.defineProperty(obj5, 'minuszero', descMinusZero); |
| 703 | |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 704 | exception = false; |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 705 | try { |
| 706 | Object.defineProperty(obj5, 'minuszero', descPlusZero); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 707 | } catch (e) { |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 708 | exception = true; |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 709 | assertTrue(/Cannot redefine property/.test(e)); |
| 710 | } |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 711 | assertTrue(exception); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 712 | |
| 713 | |
| 714 | Object.defineProperty(obj5, 'pluszero', descPlusZero); |
| 715 | |
| 716 | // Make sure we can redefine with +0. |
| 717 | Object.defineProperty(obj5, 'pluszero', descPlusZero); |
| 718 | |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 719 | exception = false; |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 720 | try { |
| 721 | Object.defineProperty(obj5, 'pluszero', descMinusZero); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 722 | } catch (e) { |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 723 | exception = true; |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 724 | assertTrue(/Cannot redefine property/.test(e)); |
| 725 | } |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 726 | assertTrue(exception); |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 727 | |
| 728 | |
| 729 | var obj6 = {}; |
| 730 | obj6[1] = 'foo'; |
| 731 | obj6[2] = 'bar'; |
| 732 | obj6[3] = '42'; |
| 733 | obj6[4] = '43'; |
| 734 | obj6[5] = '44'; |
| 735 | |
| 736 | var descElement = { value: 'foobar' }; |
| 737 | var descElementNonConfigurable = { value: 'barfoo', configurable: false }; |
| 738 | var descElementNonWritable = { value: 'foofoo', writable: false }; |
| 739 | var descElementNonEnumerable = { value: 'barbar', enumerable: false }; |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 740 | var descElementAllFalse = { value: 'foofalse', |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 741 | configurable: false, |
| 742 | writable: false, |
| 743 | enumerable: false }; |
| 744 | |
| 745 | |
| 746 | // Redefine existing property. |
| 747 | Object.defineProperty(obj6, '1', descElement); |
| 748 | desc = Object.getOwnPropertyDescriptor(obj6, '1'); |
| 749 | assertEquals(desc.value, 'foobar'); |
| 750 | assertTrue(desc.writable); |
| 751 | assertTrue(desc.enumerable); |
| 752 | assertTrue(desc.configurable); |
| 753 | |
| 754 | // Redefine existing property with configurable: false. |
| 755 | Object.defineProperty(obj6, '2', descElementNonConfigurable); |
| 756 | desc = Object.getOwnPropertyDescriptor(obj6, '2'); |
| 757 | assertEquals(desc.value, 'barfoo'); |
| 758 | assertTrue(desc.writable); |
| 759 | assertTrue(desc.enumerable); |
| 760 | assertFalse(desc.configurable); |
| 761 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 762 | // Can use defineProperty to change the value of a non |
| 763 | // configurable property. |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 764 | try { |
| 765 | Object.defineProperty(obj6, '2', descElement); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 766 | desc = Object.getOwnPropertyDescriptor(obj6, '2'); |
| 767 | assertEquals(desc.value, 'foobar'); |
| 768 | } catch (e) { |
| 769 | assertUnreachable(); |
| 770 | } |
| 771 | |
| 772 | // Ensure that we can't change the descriptor of a |
| 773 | // non configurable property. |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 774 | exception = false; |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 775 | try { |
| 776 | var descAccessor = { get: function() { return 0; } }; |
| 777 | Object.defineProperty(obj6, '2', descAccessor); |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 778 | } catch (e) { |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 779 | exception = true; |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 780 | assertTrue(/Cannot redefine property/.test(e)); |
| 781 | } |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 782 | assertTrue(exception); |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 783 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 784 | Object.defineProperty(obj6, '2', descElementNonWritable); |
| 785 | desc = Object.getOwnPropertyDescriptor(obj6, '2'); |
| 786 | assertEquals(desc.value, 'foofoo'); |
| 787 | assertFalse(desc.writable); |
| 788 | assertTrue(desc.enumerable); |
| 789 | assertFalse(desc.configurable); |
| 790 | |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 791 | Object.defineProperty(obj6, '3', descElementNonWritable); |
| 792 | desc = Object.getOwnPropertyDescriptor(obj6, '3'); |
| 793 | assertEquals(desc.value, 'foofoo'); |
| 794 | assertFalse(desc.writable); |
| 795 | assertTrue(desc.enumerable); |
| 796 | assertTrue(desc.configurable); |
| 797 | |
| 798 | // Redefine existing property with configurable: false. |
| 799 | Object.defineProperty(obj6, '4', descElementNonEnumerable); |
| 800 | desc = Object.getOwnPropertyDescriptor(obj6, '4'); |
| 801 | assertEquals(desc.value, 'barbar'); |
| 802 | assertTrue(desc.writable); |
| 803 | assertFalse(desc.enumerable); |
| 804 | assertTrue(desc.configurable); |
| 805 | |
| 806 | // Redefine existing property with configurable: false. |
| 807 | Object.defineProperty(obj6, '5', descElementAllFalse); |
| 808 | desc = Object.getOwnPropertyDescriptor(obj6, '5'); |
| 809 | assertEquals(desc.value, 'foofalse'); |
| 810 | assertFalse(desc.writable); |
| 811 | assertFalse(desc.enumerable); |
| 812 | assertFalse(desc.configurable); |
| 813 | |
| 814 | // Define non existing property - all attributes should default to false. |
| 815 | Object.defineProperty(obj6, '15', descElement); |
| 816 | desc = Object.getOwnPropertyDescriptor(obj6, '15'); |
| 817 | assertEquals(desc.value, 'foobar'); |
| 818 | assertFalse(desc.writable); |
| 819 | assertFalse(desc.enumerable); |
| 820 | assertFalse(desc.configurable); |
| 821 | |
| 822 | // Make sure that we can't redefine using direct access. |
| 823 | obj6[15] ='overwrite'; |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 824 | assertEquals(obj6[15],'foobar'); |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 825 | |
| 826 | |
| 827 | // Repeat the above tests on an array. |
| 828 | var arr = new Array(); |
| 829 | arr[1] = 'foo'; |
| 830 | arr[2] = 'bar'; |
| 831 | arr[3] = '42'; |
| 832 | arr[4] = '43'; |
| 833 | arr[5] = '44'; |
| 834 | |
| 835 | var descElement = { value: 'foobar' }; |
| 836 | var descElementNonConfigurable = { value: 'barfoo', configurable: false }; |
| 837 | var descElementNonWritable = { value: 'foofoo', writable: false }; |
| 838 | var descElementNonEnumerable = { value: 'barbar', enumerable: false }; |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 839 | var descElementAllFalse = { value: 'foofalse', |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 840 | configurable: false, |
| 841 | writable: false, |
| 842 | enumerable: false }; |
| 843 | |
| 844 | |
| 845 | // Redefine existing property. |
| 846 | Object.defineProperty(arr, '1', descElement); |
| 847 | desc = Object.getOwnPropertyDescriptor(arr, '1'); |
| 848 | assertEquals(desc.value, 'foobar'); |
| 849 | assertTrue(desc.writable); |
| 850 | assertTrue(desc.enumerable); |
| 851 | assertTrue(desc.configurable); |
| 852 | |
| 853 | // Redefine existing property with configurable: false. |
| 854 | Object.defineProperty(arr, '2', descElementNonConfigurable); |
| 855 | desc = Object.getOwnPropertyDescriptor(arr, '2'); |
| 856 | assertEquals(desc.value, 'barfoo'); |
| 857 | assertTrue(desc.writable); |
| 858 | assertTrue(desc.enumerable); |
| 859 | assertFalse(desc.configurable); |
| 860 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 861 | // Can use defineProperty to change the value of a non |
| 862 | // configurable property of an array. |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 863 | try { |
| 864 | Object.defineProperty(arr, '2', descElement); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 865 | desc = Object.getOwnPropertyDescriptor(arr, '2'); |
| 866 | assertEquals(desc.value, 'foobar'); |
| 867 | } catch (e) { |
| 868 | assertUnreachable(); |
| 869 | } |
| 870 | |
| 871 | // Ensure that we can't change the descriptor of a |
| 872 | // non configurable property. |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 873 | exception = false; |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 874 | try { |
| 875 | var descAccessor = { get: function() { return 0; } }; |
| 876 | Object.defineProperty(arr, '2', descAccessor); |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 877 | } catch (e) { |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 878 | exception = true; |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 879 | assertTrue(/Cannot redefine property/.test(e)); |
| 880 | } |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 881 | assertTrue(exception); |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 882 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 883 | Object.defineProperty(arr, '2', descElementNonWritable); |
| 884 | desc = Object.getOwnPropertyDescriptor(arr, '2'); |
| 885 | assertEquals(desc.value, 'foofoo'); |
| 886 | assertFalse(desc.writable); |
| 887 | assertTrue(desc.enumerable); |
| 888 | assertFalse(desc.configurable); |
| 889 | |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 890 | Object.defineProperty(arr, '3', descElementNonWritable); |
| 891 | desc = Object.getOwnPropertyDescriptor(arr, '3'); |
| 892 | assertEquals(desc.value, 'foofoo'); |
| 893 | assertFalse(desc.writable); |
| 894 | assertTrue(desc.enumerable); |
| 895 | assertTrue(desc.configurable); |
| 896 | |
| 897 | // Redefine existing property with configurable: false. |
| 898 | Object.defineProperty(arr, '4', descElementNonEnumerable); |
| 899 | desc = Object.getOwnPropertyDescriptor(arr, '4'); |
| 900 | assertEquals(desc.value, 'barbar'); |
| 901 | assertTrue(desc.writable); |
| 902 | assertFalse(desc.enumerable); |
| 903 | assertTrue(desc.configurable); |
| 904 | |
| 905 | // Redefine existing property with configurable: false. |
| 906 | Object.defineProperty(arr, '5', descElementAllFalse); |
| 907 | desc = Object.getOwnPropertyDescriptor(arr, '5'); |
| 908 | assertEquals(desc.value, 'foofalse'); |
| 909 | assertFalse(desc.writable); |
| 910 | assertFalse(desc.enumerable); |
| 911 | assertFalse(desc.configurable); |
| 912 | |
| 913 | // Define non existing property - all attributes should default to false. |
| 914 | Object.defineProperty(arr, '15', descElement); |
| 915 | desc = Object.getOwnPropertyDescriptor(arr, '15'); |
| 916 | assertEquals(desc.value, 'foobar'); |
| 917 | assertFalse(desc.writable); |
| 918 | assertFalse(desc.enumerable); |
| 919 | assertFalse(desc.configurable); |
| 920 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 921 | // See issue 968: http://code.google.com/p/v8/issues/detail?id=968 |
| 922 | var o = { x : 42 }; |
| 923 | Object.defineProperty(o, "x", { writable: false }); |
| 924 | assertEquals(42, o.x); |
| 925 | o.x = 37; |
| 926 | assertEquals(42, o.x); |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 927 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 928 | o = { x : 42 }; |
| 929 | Object.defineProperty(o, "x", {}); |
| 930 | assertEquals(42, o.x); |
| 931 | o.x = 37; |
| 932 | // Writability is preserved. |
| 933 | assertEquals(37, o.x); |
| 934 | |
| 935 | var o = { }; |
| 936 | Object.defineProperty(o, "x", { writable: false }); |
| 937 | assertEquals(undefined, o.x); |
| 938 | o.x = 37; |
| 939 | assertEquals(undefined, o.x); |
| 940 | |
| 941 | o = { get x() { return 87; } }; |
| 942 | Object.defineProperty(o, "x", { writable: false }); |
| 943 | assertEquals(undefined, o.x); |
| 944 | o.x = 37; |
| 945 | assertEquals(undefined, o.x); |
| 946 | |
| 947 | // Ignore inherited properties. |
| 948 | o = { __proto__ : { x : 87 } }; |
| 949 | Object.defineProperty(o, "x", { writable: false }); |
| 950 | assertEquals(undefined, o.x); |
| 951 | o.x = 37; |
| 952 | assertEquals(undefined, o.x); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 953 | |
| 954 | function testDefineProperty(obj, propertyName, desc, resultDesc) { |
| 955 | Object.defineProperty(obj, propertyName, desc); |
| 956 | var actualDesc = Object.getOwnPropertyDescriptor(obj, propertyName); |
| 957 | assertEquals(resultDesc.enumerable, actualDesc.enumerable); |
| 958 | assertEquals(resultDesc.configurable, actualDesc.configurable); |
| 959 | if (resultDesc.hasOwnProperty('value')) { |
| 960 | assertEquals(resultDesc.value, actualDesc.value); |
| 961 | assertEquals(resultDesc.writable, actualDesc.writable); |
| 962 | assertFalse(resultDesc.hasOwnProperty('get')); |
| 963 | assertFalse(resultDesc.hasOwnProperty('set')); |
| 964 | } else { |
| 965 | assertEquals(resultDesc.get, actualDesc.get); |
| 966 | assertEquals(resultDesc.set, actualDesc.set); |
| 967 | assertFalse(resultDesc.hasOwnProperty('value')); |
| 968 | assertFalse(resultDesc.hasOwnProperty('writable')); |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | // tests redefining existing property with a generic descriptor |
| 973 | o = { p : 42 }; |
| 974 | testDefineProperty(o, 'p', |
| 975 | { }, |
| 976 | { value : 42, writable : true, enumerable : true, configurable : true }); |
| 977 | |
| 978 | o = { p : 42 }; |
| 979 | testDefineProperty(o, 'p', |
| 980 | { enumerable : true }, |
| 981 | { value : 42, writable : true, enumerable : true, configurable : true }); |
| 982 | |
| 983 | o = { p : 42 }; |
| 984 | testDefineProperty(o, 'p', |
| 985 | { configurable : true }, |
| 986 | { value : 42, writable : true, enumerable : true, configurable : true }); |
| 987 | |
| 988 | o = { p : 42 }; |
| 989 | testDefineProperty(o, 'p', |
| 990 | { enumerable : false }, |
| 991 | { value : 42, writable : true, enumerable : false, configurable : true }); |
| 992 | |
| 993 | o = { p : 42 }; |
| 994 | testDefineProperty(o, 'p', |
| 995 | { configurable : false }, |
| 996 | { value : 42, writable : true, enumerable : true, configurable : false }); |
| 997 | |
| 998 | o = { p : 42 }; |
| 999 | testDefineProperty(o, 'p', |
| 1000 | { enumerable : true, configurable : true }, |
| 1001 | { value : 42, writable : true, enumerable : true, configurable : true }); |
| 1002 | |
| 1003 | o = { p : 42 }; |
| 1004 | testDefineProperty(o, 'p', |
| 1005 | { enumerable : false, configurable : true }, |
| 1006 | { value : 42, writable : true, enumerable : false, configurable : true }); |
| 1007 | |
| 1008 | o = { p : 42 }; |
| 1009 | testDefineProperty(o, 'p', |
| 1010 | { enumerable : true, configurable : false }, |
| 1011 | { value : 42, writable : true, enumerable : true, configurable : false }); |
| 1012 | |
| 1013 | o = { p : 42 }; |
| 1014 | testDefineProperty(o, 'p', |
| 1015 | { enumerable : false, configurable : false }, |
| 1016 | { value : 42, writable : true, enumerable : false, configurable : false }); |
| 1017 | |
| 1018 | // can make a writable, non-configurable field non-writable |
| 1019 | o = { p : 42 }; |
| 1020 | Object.defineProperty(o, 'p', { configurable: false }); |
| 1021 | testDefineProperty(o, 'p', |
| 1022 | { writable: false }, |
| 1023 | { value : 42, writable : false, enumerable : true, configurable : false }); |
| 1024 | |
| 1025 | // redefine of get only property with generic descriptor |
| 1026 | o = {}; |
| 1027 | Object.defineProperty(o, 'p', |
| 1028 | { get : getter1, enumerable: true, configurable: true }); |
| 1029 | testDefineProperty(o, 'p', |
| 1030 | { enumerable : false, configurable : false }, |
| 1031 | { get: getter1, set: undefined, enumerable : false, configurable : false }); |
| 1032 | |
| 1033 | // redefine of get/set only property with generic descriptor |
| 1034 | o = {}; |
| 1035 | Object.defineProperty(o, 'p', |
| 1036 | { get: getter1, set: setter1, enumerable: true, configurable: true }); |
| 1037 | testDefineProperty(o, 'p', |
| 1038 | { enumerable : false, configurable : false }, |
| 1039 | { get: getter1, set: setter1, enumerable : false, configurable : false }); |
| 1040 | |
| 1041 | // redefine of set only property with generic descriptor |
| 1042 | o = {}; |
| 1043 | Object.defineProperty(o, 'p', |
| 1044 | { set : setter1, enumerable: true, configurable: true }); |
| 1045 | testDefineProperty(o, 'p', |
| 1046 | { enumerable : false, configurable : false }, |
| 1047 | { get: undefined, set: setter1, enumerable : false, configurable : false }); |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1048 | |
| 1049 | |
| 1050 | // Regression test: Ensure that growing dictionaries are not ignored. |
| 1051 | o = {}; |
| 1052 | for (var i = 0; i < 1000; i++) { |
| 1053 | // Non-enumerable property forces dictionary mode. |
| 1054 | Object.defineProperty(o, i, {value: i, enumerable: false}); |
| 1055 | } |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 1056 | assertEquals(999, o[999]); |
| 1057 | |
| 1058 | |
| 1059 | // Regression test: Bizzare behavior on non-strict arguments object. |
| 1060 | (function test(arg0) { |
| 1061 | // Here arguments[0] is a fast alias on arg0. |
| 1062 | Object.defineProperty(arguments, "0", { |
| 1063 | value:1, |
| 1064 | enumerable:false |
| 1065 | }); |
| 1066 | // Here arguments[0] is a slow alias on arg0. |
| 1067 | Object.defineProperty(arguments, "0", { |
| 1068 | value:2, |
| 1069 | writable:false |
| 1070 | }); |
| 1071 | // Here arguments[0] is no alias at all. |
| 1072 | Object.defineProperty(arguments, "0", { |
| 1073 | value:3 |
| 1074 | }); |
| 1075 | assertEquals(2, arg0); |
| 1076 | assertEquals(3, arguments[0]); |
| 1077 | })(0); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1078 | |
| 1079 | |
| 1080 | // Regression test: We should never observe the hole value. |
| 1081 | var objectWithGetter = {}; |
| 1082 | objectWithGetter.__defineGetter__('foo', function() {}); |
| 1083 | assertEquals(undefined, objectWithGetter.__lookupSetter__('foo')); |
| 1084 | |
| 1085 | var objectWithSetter = {}; |
| 1086 | objectWithSetter.__defineSetter__('foo', function(x) {}); |
| 1087 | assertEquals(undefined, objectWithSetter.__lookupGetter__('foo')); |
svenpanne@chromium.org | 619781a | 2012-07-05 08:22:44 +0000 | [diff] [blame^] | 1088 | |
| 1089 | // An object with a getter on the prototype chain. |
| 1090 | function getter() { return 111; } |
| 1091 | function anotherGetter() { return 222; } |
| 1092 | |
| 1093 | function testGetterOnProto(expected, o) { |
| 1094 | assertEquals(expected, o.quebec); |
| 1095 | } |
| 1096 | |
| 1097 | obj1 = {}; |
| 1098 | Object.defineProperty(obj1, "quebec", { get: getter, configurable: true }); |
| 1099 | obj2 = Object.create(obj1); |
| 1100 | obj3 = Object.create(obj2); |
| 1101 | |
| 1102 | testGetterOnProto(111, obj3); |
| 1103 | testGetterOnProto(111, obj3); |
| 1104 | %OptimizeFunctionOnNextCall(testGetterOnProto); |
| 1105 | testGetterOnProto(111, obj3); |
| 1106 | testGetterOnProto(111, obj3); |
| 1107 | |
| 1108 | Object.defineProperty(obj1, "quebec", { get: anotherGetter }); |
| 1109 | |
| 1110 | testGetterOnProto(222, obj3); |
| 1111 | testGetterOnProto(222, obj3); |
| 1112 | %OptimizeFunctionOnNextCall(testGetterOnProto); |
| 1113 | testGetterOnProto(222, obj3); |
| 1114 | testGetterOnProto(222, obj3); |
| 1115 | |
| 1116 | // An object with a setter on the prototype chain. |
| 1117 | var modifyMe; |
| 1118 | function setter(x) { modifyMe = x+1; } |
| 1119 | function anotherSetter(x) { modifyMe = x+2; } |
| 1120 | |
| 1121 | function testSetterOnProto(expected, o) { |
| 1122 | modifyMe = 333; |
| 1123 | o.romeo = 444; |
| 1124 | assertEquals(expected, modifyMe); |
| 1125 | } |
| 1126 | |
| 1127 | obj1 = {}; |
| 1128 | Object.defineProperty(obj1, "romeo", { set: setter, configurable: true }); |
| 1129 | obj2 = Object.create(obj1); |
| 1130 | obj3 = Object.create(obj2); |
| 1131 | |
| 1132 | testSetterOnProto(445, obj3); |
| 1133 | testSetterOnProto(445, obj3); |
| 1134 | %OptimizeFunctionOnNextCall(testSetterOnProto); |
| 1135 | testSetterOnProto(445, obj3); |
| 1136 | testSetterOnProto(445, obj3); |
| 1137 | |
| 1138 | Object.defineProperty(obj1, "romeo", { set: anotherSetter }); |
| 1139 | |
| 1140 | testSetterOnProto(446, obj3); |
| 1141 | testSetterOnProto(446, obj3); |
| 1142 | %OptimizeFunctionOnNextCall(testSetterOnProto); |
| 1143 | testSetterOnProto(446, obj3); |
| 1144 | testSetterOnProto(446, obj3); |
| 1145 | |
| 1146 | // Removing a setter on the prototype chain. |
| 1147 | function testSetterOnProtoStrict(o) { |
| 1148 | "use strict"; |
| 1149 | o.sierra = 12345; |
| 1150 | } |
| 1151 | |
| 1152 | obj1 = {}; |
| 1153 | Object.defineProperty(obj1, "sierra", |
| 1154 | { get: getter, set: setter, configurable: true }); |
| 1155 | obj2 = Object.create(obj1); |
| 1156 | obj3 = Object.create(obj2); |
| 1157 | |
| 1158 | testSetterOnProtoStrict(obj3); |
| 1159 | testSetterOnProtoStrict(obj3); |
| 1160 | %OptimizeFunctionOnNextCall(testSetterOnProtoStrict); |
| 1161 | testSetterOnProtoStrict(obj3); |
| 1162 | testSetterOnProtoStrict(obj3); |
| 1163 | |
| 1164 | Object.defineProperty(obj1, "sierra", |
| 1165 | { get: getter, set: undefined, configurable: true }); |
| 1166 | |
| 1167 | exception = false; |
| 1168 | try { |
| 1169 | testSetterOnProtoStrict(obj3); |
| 1170 | } catch (e) { |
| 1171 | exception = true; |
| 1172 | assertTrue(/which has only a getter/.test(e)); |
| 1173 | } |
| 1174 | assertTrue(exception); |