Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 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.defineProperty method - ES 15.2.3.6 |
| 29 | |
| 30 | // Flags: --allow-natives-syntax |
| 31 | |
| 32 | // Check that an exception is thrown when null is passed as object. |
| 33 | try { |
| 34 | Object.defineProperty(null, null, null); |
| 35 | assertTrue(false); |
| 36 | } catch (e) { |
| 37 | assertTrue(/called on non-object/.test(e)); |
| 38 | } |
| 39 | |
| 40 | // Check that an exception is thrown when undefined is passed as object. |
| 41 | try { |
| 42 | Object.defineProperty(undefined, undefined, undefined); |
| 43 | assertTrue(false); |
| 44 | } catch (e) { |
| 45 | assertTrue(/called on non-object/.test(e)); |
| 46 | } |
| 47 | |
| 48 | // Check that an exception is thrown when non-object is passed as object. |
| 49 | try { |
| 50 | Object.defineProperty(0, "foo", undefined); |
| 51 | assertTrue(false); |
| 52 | } catch (e) { |
| 53 | assertTrue(/called on non-object/.test(e)); |
| 54 | } |
| 55 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 56 | // Object. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 57 | var obj1 = {}; |
| 58 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 59 | // Values. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 60 | var val1 = 0; |
| 61 | var val2 = 0; |
| 62 | var val3 = 0; |
| 63 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 64 | function setter1() {val1++; } |
| 65 | function getter1() {return val1; } |
| 66 | |
| 67 | function setter2() {val2++; } |
| 68 | function getter2() {return val2; } |
| 69 | |
| 70 | function setter3() {val3++; } |
| 71 | function getter3() {return val3; } |
| 72 | |
| 73 | |
| 74 | // Descriptors. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 75 | var emptyDesc = {}; |
| 76 | |
| 77 | var accessorConfigurable = { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 78 | set: setter1, |
| 79 | get: getter1, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 80 | configurable: true |
| 81 | }; |
| 82 | |
| 83 | var accessorNoConfigurable = { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 84 | set: setter2, |
| 85 | get: getter2, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 86 | configurable: false |
| 87 | }; |
| 88 | |
| 89 | var accessorOnlySet = { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 90 | set: setter3, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 91 | configurable: true |
| 92 | }; |
| 93 | |
| 94 | var accessorOnlyGet = { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 95 | get: getter3, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 96 | configurable: true |
| 97 | }; |
| 98 | |
| 99 | var accessorDefault = {set: function(){} }; |
| 100 | |
| 101 | var dataConfigurable = { value: 1000, configurable: true }; |
| 102 | |
| 103 | var dataNoConfigurable = { value: 2000, configurable: false }; |
| 104 | |
| 105 | var dataWritable = { value: 3000, writable: true}; |
| 106 | |
| 107 | |
| 108 | // Check that we can't add property with undefined attributes. |
| 109 | try { |
| 110 | Object.defineProperty(obj1, "foo", undefined); |
| 111 | assertTrue(false); |
| 112 | } catch (e) { |
| 113 | assertTrue(/must be an object/.test(e)); |
| 114 | } |
| 115 | |
| 116 | // Make sure that we can add a property with an empty descriptor and |
| 117 | // that it has the default descriptor values. |
| 118 | Object.defineProperty(obj1, "foo", emptyDesc); |
| 119 | |
| 120 | // foo should be undefined as it has no get, set or value |
| 121 | assertEquals(undefined, obj1.foo); |
| 122 | |
| 123 | // We should, however, be able to retrieve the propertydescriptor which should |
| 124 | // have all default values (according to 8.6.1). |
| 125 | var desc = Object.getOwnPropertyDescriptor(obj1, "foo"); |
| 126 | assertFalse(desc.configurable); |
| 127 | assertFalse(desc.enumerable); |
| 128 | assertFalse(desc.writable); |
| 129 | assertEquals(desc.get, undefined); |
| 130 | assertEquals(desc.set, undefined); |
| 131 | assertEquals(desc.value, undefined); |
| 132 | |
| 133 | // Make sure that getOwnPropertyDescriptor does not return a descriptor |
| 134 | // with default values if called with non existing property (otherwise |
| 135 | // the test above is invalid). |
| 136 | desc = Object.getOwnPropertyDescriptor(obj1, "bar"); |
| 137 | assertEquals(desc, undefined); |
| 138 | |
| 139 | // Make sure that foo can't be reset (as configurable is false). |
| 140 | try { |
| 141 | Object.defineProperty(obj1, "foo", accessorConfigurable); |
| 142 | } catch (e) { |
| 143 | assertTrue(/Cannot redefine property/.test(e)); |
| 144 | } |
| 145 | |
| 146 | |
| 147 | // Accessor properties |
| 148 | |
| 149 | Object.defineProperty(obj1, "bar", accessorConfigurable); |
| 150 | desc = Object.getOwnPropertyDescriptor(obj1, "bar"); |
| 151 | assertTrue(desc.configurable); |
| 152 | assertFalse(desc.enumerable); |
| 153 | assertEquals(desc.writable, undefined); |
| 154 | assertEquals(desc.get, accessorConfigurable.get); |
| 155 | assertEquals(desc.set, accessorConfigurable.set); |
| 156 | assertEquals(desc.value, undefined); |
| 157 | assertEquals(1, obj1.bar = 1); |
| 158 | assertEquals(1, val1); |
| 159 | assertEquals(1, obj1.bar = 1); |
| 160 | assertEquals(2, val1); |
| 161 | assertEquals(2, obj1.bar); |
| 162 | |
| 163 | // Redefine bar with non configurable test |
| 164 | Object.defineProperty(obj1, "bar", accessorNoConfigurable); |
| 165 | desc = Object.getOwnPropertyDescriptor(obj1, "bar"); |
| 166 | assertFalse(desc.configurable); |
| 167 | assertFalse(desc.enumerable); |
| 168 | assertEquals(desc.writable, undefined); |
| 169 | assertEquals(desc.get, accessorNoConfigurable.get); |
| 170 | assertEquals(desc.set, accessorNoConfigurable.set); |
| 171 | assertEquals(desc.value, undefined); |
| 172 | assertEquals(1, obj1.bar = 1); |
| 173 | assertEquals(2, val1); |
| 174 | assertEquals(1, val2); |
| 175 | assertEquals(1, obj1.bar = 1) |
| 176 | assertEquals(2, val1); |
| 177 | assertEquals(2, val2); |
| 178 | assertEquals(2, obj1.bar); |
| 179 | |
| 180 | // Try to redefine bar again - should fail as configurable is false. |
| 181 | try { |
| 182 | Object.defineProperty(obj1, "bar", accessorConfigurable); |
| 183 | assertTrue(false); |
| 184 | } catch(e) { |
| 185 | assertTrue(/Cannot redefine property/.test(e)); |
| 186 | } |
| 187 | |
| 188 | // Try to redefine bar again using the data descriptor - should fail. |
| 189 | try { |
| 190 | Object.defineProperty(obj1, "bar", dataConfigurable); |
| 191 | assertTrue(false); |
| 192 | } catch(e) { |
| 193 | assertTrue(/Cannot redefine property/.test(e)); |
| 194 | } |
| 195 | |
| 196 | // Redefine using same descriptor - should succeed. |
| 197 | Object.defineProperty(obj1, "bar", accessorNoConfigurable); |
| 198 | desc = Object.getOwnPropertyDescriptor(obj1, "bar"); |
| 199 | assertFalse(desc.configurable); |
| 200 | assertFalse(desc.enumerable); |
| 201 | assertEquals(desc.writable, undefined); |
| 202 | assertEquals(desc.get, accessorNoConfigurable.get); |
| 203 | assertEquals(desc.set, accessorNoConfigurable.set); |
| 204 | assertEquals(desc.value, undefined); |
| 205 | assertEquals(1, obj1.bar = 1); |
| 206 | assertEquals(2, val1); |
| 207 | assertEquals(3, val2); |
| 208 | assertEquals(1, obj1.bar = 1) |
| 209 | assertEquals(2, val1); |
| 210 | assertEquals(4, val2); |
| 211 | assertEquals(4, obj1.bar); |
| 212 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 213 | // Define an accessor that has only a setter. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 214 | Object.defineProperty(obj1, "setOnly", accessorOnlySet); |
| 215 | desc = Object.getOwnPropertyDescriptor(obj1, "setOnly"); |
| 216 | assertTrue(desc.configurable); |
| 217 | assertFalse(desc.enumerable); |
| 218 | assertEquals(desc.set, accessorOnlySet.set); |
| 219 | assertEquals(desc.writable, undefined); |
| 220 | assertEquals(desc.value, undefined); |
| 221 | assertEquals(desc.get, undefined); |
| 222 | assertEquals(1, obj1.setOnly = 1); |
| 223 | assertEquals(1, val3); |
| 224 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 225 | // Add a getter - should not touch the setter. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 226 | Object.defineProperty(obj1, "setOnly", accessorOnlyGet); |
| 227 | desc = Object.getOwnPropertyDescriptor(obj1, "setOnly"); |
| 228 | assertTrue(desc.configurable); |
| 229 | assertFalse(desc.enumerable); |
| 230 | assertEquals(desc.get, accessorOnlyGet.get); |
| 231 | assertEquals(desc.set, accessorOnlySet.set); |
| 232 | assertEquals(desc.writable, undefined); |
| 233 | assertEquals(desc.value, undefined); |
| 234 | assertEquals(1, obj1.setOnly = 1); |
| 235 | assertEquals(2, val3); |
| 236 | |
| 237 | // The above should also work if redefining just a getter or setter on |
| 238 | // an existing property with both a getter and a setter. |
| 239 | Object.defineProperty(obj1, "both", accessorConfigurable); |
| 240 | |
| 241 | Object.defineProperty(obj1, "both", accessorOnlySet); |
| 242 | desc = Object.getOwnPropertyDescriptor(obj1, "both"); |
| 243 | assertTrue(desc.configurable); |
| 244 | assertFalse(desc.enumerable); |
| 245 | assertEquals(desc.set, accessorOnlySet.set); |
| 246 | assertEquals(desc.get, accessorConfigurable.get); |
| 247 | assertEquals(desc.writable, undefined); |
| 248 | assertEquals(desc.value, undefined); |
| 249 | assertEquals(1, obj1.both = 1); |
| 250 | assertEquals(3, val3); |
| 251 | |
| 252 | |
| 253 | // Data properties |
| 254 | |
| 255 | Object.defineProperty(obj1, "foobar", dataConfigurable); |
| 256 | desc = Object.getOwnPropertyDescriptor(obj1, "foobar"); |
| 257 | assertEquals(obj1.foobar, 1000); |
| 258 | assertEquals(desc.value, 1000); |
| 259 | assertTrue(desc.configurable); |
| 260 | assertFalse(desc.writable); |
| 261 | assertFalse(desc.enumerable); |
| 262 | assertEquals(desc.get, undefined); |
| 263 | assertEquals(desc.set, undefined); |
| 264 | //Try writing to non writable attribute - should remain 1000 |
| 265 | obj1.foobar = 1001; |
| 266 | assertEquals(obj1.foobar, 1000); |
| 267 | |
| 268 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 269 | // Redefine to writable descriptor - now writing to foobar should be allowed. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 270 | Object.defineProperty(obj1, "foobar", dataWritable); |
| 271 | desc = Object.getOwnPropertyDescriptor(obj1, "foobar"); |
| 272 | assertEquals(obj1.foobar, 3000); |
| 273 | assertEquals(desc.value, 3000); |
| 274 | // Note that since dataWritable does not define configurable the configurable |
| 275 | // setting from the redefined property (in this case true) is used. |
| 276 | assertTrue(desc.configurable); |
| 277 | assertTrue(desc.writable); |
| 278 | assertFalse(desc.enumerable); |
| 279 | assertEquals(desc.get, undefined); |
| 280 | assertEquals(desc.set, undefined); |
| 281 | // Writing to the property should now be allowed |
| 282 | obj1.foobar = 1001; |
| 283 | assertEquals(obj1.foobar, 1001); |
| 284 | |
| 285 | |
| 286 | // Redefine with non configurable data property. |
| 287 | Object.defineProperty(obj1, "foobar", dataNoConfigurable); |
| 288 | desc = Object.getOwnPropertyDescriptor(obj1, "foobar"); |
| 289 | assertEquals(obj1.foobar, 2000); |
| 290 | assertEquals(desc.value, 2000); |
| 291 | assertFalse(desc.configurable); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 292 | assertTrue(desc.writable); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 293 | assertFalse(desc.enumerable); |
| 294 | assertEquals(desc.get, undefined); |
| 295 | assertEquals(desc.set, undefined); |
| 296 | |
| 297 | // Try redefine again - shold fail because configurable is now false. |
| 298 | try { |
| 299 | Object.defineProperty(obj1, "foobar", dataConfigurable); |
| 300 | assertTrue(false); |
| 301 | } catch (e) { |
| 302 | assertTrue(/Cannot redefine property/.test(e)); |
| 303 | } |
| 304 | |
| 305 | // Try redefine again with accessor property - shold also fail. |
| 306 | try { |
| 307 | Object.defineProperty(obj1, "foobar", dataConfigurable); |
| 308 | assertTrue(false); |
| 309 | } catch (e) { |
| 310 | assertTrue(/Cannot redefine property/.test(e)); |
| 311 | } |
| 312 | |
| 313 | |
| 314 | // Redifine with the same descriptor - should succeed (step 6). |
| 315 | Object.defineProperty(obj1, "foobar", dataNoConfigurable); |
| 316 | desc = Object.getOwnPropertyDescriptor(obj1, "foobar"); |
| 317 | assertEquals(obj1.foobar, 2000); |
| 318 | assertEquals(desc.value, 2000); |
| 319 | assertFalse(desc.configurable); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 320 | assertTrue(desc.writable); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 321 | assertFalse(desc.enumerable); |
| 322 | assertEquals(desc.get, undefined); |
| 323 | assertEquals(desc.set, undefined); |
| 324 | |
| 325 | |
| 326 | // New object |
| 327 | var obj2 = {}; |
| 328 | |
| 329 | // Make accessor - redefine to data |
| 330 | Object.defineProperty(obj2, "foo", accessorConfigurable); |
| 331 | |
| 332 | // Redefine to data property |
| 333 | Object.defineProperty(obj2, "foo", dataConfigurable); |
| 334 | desc = Object.getOwnPropertyDescriptor(obj2, "foo"); |
| 335 | assertEquals(obj2.foo, 1000); |
| 336 | assertEquals(desc.value, 1000); |
| 337 | assertTrue(desc.configurable); |
| 338 | assertFalse(desc.writable); |
| 339 | assertFalse(desc.enumerable); |
| 340 | assertEquals(desc.get, undefined); |
| 341 | assertEquals(desc.set, undefined); |
| 342 | |
| 343 | |
| 344 | // Redefine back to accessor |
| 345 | Object.defineProperty(obj2, "foo", accessorConfigurable); |
| 346 | desc = Object.getOwnPropertyDescriptor(obj2, "foo"); |
| 347 | assertTrue(desc.configurable); |
| 348 | assertFalse(desc.enumerable); |
| 349 | assertEquals(desc.writable, undefined); |
| 350 | assertEquals(desc.get, accessorConfigurable.get); |
| 351 | assertEquals(desc.set, accessorConfigurable.set); |
| 352 | assertEquals(desc.value, undefined); |
| 353 | assertEquals(1, obj2.foo = 1); |
| 354 | assertEquals(3, val1); |
| 355 | assertEquals(4, val2); |
| 356 | assertEquals(3, obj2.foo); |
| 357 | |
| 358 | // Make data - redefine to accessor |
| 359 | Object.defineProperty(obj2, "bar", dataConfigurable) |
| 360 | |
| 361 | // Redefine to accessor property |
| 362 | Object.defineProperty(obj2, "bar", accessorConfigurable); |
| 363 | desc = Object.getOwnPropertyDescriptor(obj2, "bar"); |
| 364 | assertTrue(desc.configurable); |
| 365 | assertFalse(desc.enumerable); |
| 366 | assertEquals(desc.writable, undefined); |
| 367 | assertEquals(desc.get, accessorConfigurable.get); |
| 368 | assertEquals(desc.set, accessorConfigurable.set); |
| 369 | assertEquals(desc.value, undefined); |
| 370 | assertEquals(1, obj2.bar = 1); |
| 371 | assertEquals(4, val1); |
| 372 | assertEquals(4, val2); |
| 373 | assertEquals(4, obj2.foo); |
| 374 | |
| 375 | // Redefine back to data property |
| 376 | Object.defineProperty(obj2, "bar", dataConfigurable); |
| 377 | desc = Object.getOwnPropertyDescriptor(obj2, "bar"); |
| 378 | assertEquals(obj2.bar, 1000); |
| 379 | assertEquals(desc.value, 1000); |
| 380 | assertTrue(desc.configurable); |
| 381 | assertFalse(desc.writable); |
| 382 | assertFalse(desc.enumerable); |
| 383 | assertEquals(desc.get, undefined); |
| 384 | assertEquals(desc.set, undefined); |
| 385 | |
| 386 | |
| 387 | // Redefinition of an accessor defined using __defineGetter__ and |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 388 | // __defineSetter__. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 389 | function get(){return this.x} |
| 390 | function set(x){this.x=x}; |
| 391 | |
| 392 | var obj3 = {x:1000}; |
| 393 | obj3.__defineGetter__("foo", get); |
| 394 | obj3.__defineSetter__("foo", set); |
| 395 | |
| 396 | desc = Object.getOwnPropertyDescriptor(obj3, "foo"); |
| 397 | assertTrue(desc.configurable); |
| 398 | assertTrue(desc.enumerable); |
| 399 | assertEquals(desc.writable, undefined); |
| 400 | assertEquals(desc.get, get); |
| 401 | assertEquals(desc.set, set); |
| 402 | assertEquals(desc.value, undefined); |
| 403 | assertEquals(1, obj3.foo = 1); |
| 404 | assertEquals(1, obj3.x); |
| 405 | assertEquals(1, obj3.foo); |
| 406 | |
| 407 | // Redefine to accessor property (non configurable) - note that enumerable |
| 408 | // which we do not redefine should remain the same (true). |
| 409 | Object.defineProperty(obj3, "foo", accessorNoConfigurable); |
| 410 | desc = Object.getOwnPropertyDescriptor(obj3, "foo"); |
| 411 | assertFalse(desc.configurable); |
| 412 | assertTrue(desc.enumerable); |
| 413 | assertEquals(desc.writable, undefined); |
| 414 | assertEquals(desc.get, accessorNoConfigurable.get); |
| 415 | assertEquals(desc.set, accessorNoConfigurable.set); |
| 416 | assertEquals(desc.value, undefined); |
| 417 | assertEquals(1, obj3.foo = 1); |
| 418 | assertEquals(5, val2); |
| 419 | assertEquals(5, obj3.foo); |
| 420 | |
| 421 | |
| 422 | obj3.__defineGetter__("bar", get); |
| 423 | obj3.__defineSetter__("bar", set); |
| 424 | |
| 425 | |
| 426 | // Redefine back to data property |
| 427 | Object.defineProperty(obj3, "bar", dataConfigurable); |
| 428 | desc = Object.getOwnPropertyDescriptor(obj3, "bar"); |
| 429 | assertEquals(obj3.bar, 1000); |
| 430 | assertEquals(desc.value, 1000); |
| 431 | assertTrue(desc.configurable); |
| 432 | assertFalse(desc.writable); |
| 433 | assertTrue(desc.enumerable); |
| 434 | assertEquals(desc.get, undefined); |
| 435 | assertEquals(desc.set, undefined); |
| 436 | |
| 437 | |
| 438 | var obj4 = {}; |
| 439 | var func = function (){return 42;}; |
| 440 | obj4.bar = func; |
| 441 | assertEquals(42, obj4.bar()); |
| 442 | |
| 443 | Object.defineProperty(obj4, "bar", accessorConfigurable); |
| 444 | desc = Object.getOwnPropertyDescriptor(obj4, "bar"); |
| 445 | assertTrue(desc.configurable); |
| 446 | assertTrue(desc.enumerable); |
| 447 | assertEquals(desc.writable, undefined); |
| 448 | assertEquals(desc.get, accessorConfigurable.get); |
| 449 | assertEquals(desc.set, accessorConfigurable.set); |
| 450 | assertEquals(desc.value, undefined); |
| 451 | assertEquals(1, obj4.bar = 1); |
| 452 | assertEquals(5, val1); |
| 453 | assertEquals(5, obj4.bar); |
| 454 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 455 | // Make sure an error is thrown when trying to access to redefined function. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 456 | try { |
| 457 | obj4.bar(); |
| 458 | assertTrue(false); |
| 459 | } catch (e) { |
| 460 | assertTrue(/is not a function/.test(e)); |
| 461 | } |
| 462 | |
| 463 | |
| 464 | // Test runtime calls to DefineOrRedefineDataProperty and |
| 465 | // DefineOrRedefineAccessorProperty - make sure we don't |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 466 | // crash. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 467 | try { |
| 468 | %DefineOrRedefineAccessorProperty(0, 0, 0, 0, 0); |
| 469 | } catch (e) { |
| 470 | assertTrue(/illegal access/.test(e)); |
| 471 | } |
| 472 | |
| 473 | try { |
| 474 | %DefineOrRedefineDataProperty(0, 0, 0, 0); |
| 475 | } catch (e) { |
| 476 | assertTrue(/illegal access/.test(e)); |
| 477 | } |
| 478 | |
| 479 | try { |
| 480 | %DefineOrRedefineDataProperty(null, null, null, null); |
| 481 | } catch (e) { |
| 482 | assertTrue(/illegal access/.test(e)); |
| 483 | } |
| 484 | |
| 485 | try { |
| 486 | %DefineOrRedefineAccessorProperty(null, null, null, null, null); |
| 487 | } catch (e) { |
| 488 | assertTrue(/illegal access/.test(e)); |
| 489 | } |
| 490 | |
| 491 | try { |
| 492 | %DefineOrRedefineDataProperty({}, null, null, null); |
| 493 | } catch (e) { |
| 494 | assertTrue(/illegal access/.test(e)); |
| 495 | } |
| 496 | |
| 497 | // Defining properties null should fail even when we have |
| 498 | // other allowed values |
| 499 | try { |
| 500 | %DefineOrRedefineAccessorProperty(null, 'foo', 0, func, 0); |
| 501 | } catch (e) { |
| 502 | assertTrue(/illegal access/.test(e)); |
| 503 | } |
| 504 | |
| 505 | try { |
| 506 | %DefineOrRedefineDataProperty(null, 'foo', 0, 0); |
| 507 | } catch (e) { |
| 508 | assertTrue(/illegal access/.test(e)); |
| 509 | } |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame^] | 510 | |
| 511 | // Test that all possible differences in step 6 in DefineOwnProperty are |
| 512 | // exercised, i.e., any difference in the given property descriptor and the |
| 513 | // existing properties should not return true, but throw an error if the |
| 514 | // existing configurable property is false. |
| 515 | |
| 516 | var obj5 = {}; |
| 517 | // Enumerable will default to false. |
| 518 | Object.defineProperty(obj5, 'foo', accessorNoConfigurable); |
| 519 | desc = Object.getOwnPropertyDescriptor(obj5, 'foo'); |
| 520 | // First, test that we are actually allowed to set the accessor if all |
| 521 | // values are of the descriptor are the same as the existing one. |
| 522 | Object.defineProperty(obj5, 'foo', accessorNoConfigurable); |
| 523 | |
| 524 | // Different setter. |
| 525 | var descDifferent = { |
| 526 | configurable:false, |
| 527 | enumerable:false, |
| 528 | set: setter1, |
| 529 | get: getter2 |
| 530 | }; |
| 531 | |
| 532 | try { |
| 533 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 534 | assertTrue(false); |
| 535 | } catch (e) { |
| 536 | assertTrue(/Cannot redefine property/.test(e)); |
| 537 | } |
| 538 | |
| 539 | // Different getter. |
| 540 | descDifferent = { |
| 541 | configurable:false, |
| 542 | enumerable:false, |
| 543 | set: setter2, |
| 544 | get: getter1 |
| 545 | }; |
| 546 | |
| 547 | try { |
| 548 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 549 | assertTrue(false); |
| 550 | } catch (e) { |
| 551 | assertTrue(/Cannot redefine property/.test(e)); |
| 552 | } |
| 553 | |
| 554 | // Different enumerable. |
| 555 | descDifferent = { |
| 556 | configurable:false, |
| 557 | enumerable:true, |
| 558 | set: setter2, |
| 559 | get: getter2 |
| 560 | }; |
| 561 | |
| 562 | try { |
| 563 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 564 | assertTrue(false); |
| 565 | } catch (e) { |
| 566 | assertTrue(/Cannot redefine property/.test(e)); |
| 567 | } |
| 568 | |
| 569 | // Different configurable. |
| 570 | descDifferent = { |
| 571 | configurable:false, |
| 572 | enumerable:true, |
| 573 | set: setter2, |
| 574 | get: getter2 |
| 575 | }; |
| 576 | |
| 577 | try { |
| 578 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 579 | assertTrue(false); |
| 580 | } catch (e) { |
| 581 | assertTrue(/Cannot redefine property/.test(e)); |
| 582 | } |
| 583 | |
| 584 | // No difference. |
| 585 | descDifferent = { |
| 586 | configurable:false, |
| 587 | enumerable:false, |
| 588 | set: setter2, |
| 589 | get: getter2 |
| 590 | }; |
| 591 | // Make sure we can still redefine if all properties are the same. |
| 592 | Object.defineProperty(obj5, 'foo', descDifferent); |
| 593 | |
| 594 | // Make sure that obj5 still holds the original values. |
| 595 | desc = Object.getOwnPropertyDescriptor(obj5, 'foo'); |
| 596 | assertEquals(desc.get, getter2); |
| 597 | assertEquals(desc.set, setter2); |
| 598 | assertFalse(desc.enumerable); |
| 599 | assertFalse(desc.configurable); |
| 600 | |
| 601 | |
| 602 | // Also exercise step 6 on data property, writable and enumerable |
| 603 | // defaults to false. |
| 604 | Object.defineProperty(obj5, 'bar', dataNoConfigurable); |
| 605 | |
| 606 | // Test that redefinition with the same property descriptor is possible |
| 607 | Object.defineProperty(obj5, 'bar', dataNoConfigurable); |
| 608 | |
| 609 | // Different value. |
| 610 | descDifferent = { |
| 611 | configurable:false, |
| 612 | enumerable:false, |
| 613 | writable: false, |
| 614 | value: 1999 |
| 615 | }; |
| 616 | |
| 617 | try { |
| 618 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 619 | assertTrue(false); |
| 620 | } catch (e) { |
| 621 | assertTrue(/Cannot redefine property/.test(e)); |
| 622 | } |
| 623 | |
| 624 | // Different writable. |
| 625 | descDifferent = { |
| 626 | configurable:false, |
| 627 | enumerable:false, |
| 628 | writable: true, |
| 629 | value: 2000 |
| 630 | }; |
| 631 | |
| 632 | try { |
| 633 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 634 | assertTrue(false); |
| 635 | } catch (e) { |
| 636 | assertTrue(/Cannot redefine property/.test(e)); |
| 637 | } |
| 638 | |
| 639 | |
| 640 | // Different enumerable. |
| 641 | descDifferent = { |
| 642 | configurable:false, |
| 643 | enumerable:true , |
| 644 | writable:false, |
| 645 | value: 2000 |
| 646 | }; |
| 647 | |
| 648 | try { |
| 649 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 650 | assertTrue(false); |
| 651 | } catch (e) { |
| 652 | assertTrue(/Cannot redefine property/.test(e)); |
| 653 | } |
| 654 | |
| 655 | |
| 656 | // Different configurable. |
| 657 | descDifferent = { |
| 658 | configurable:true, |
| 659 | enumerable:false, |
| 660 | writable:false, |
| 661 | value: 2000 |
| 662 | }; |
| 663 | |
| 664 | try { |
| 665 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 666 | assertTrue(false); |
| 667 | } catch (e) { |
| 668 | assertTrue(/Cannot redefine property/.test(e)); |
| 669 | } |
| 670 | |
| 671 | // No difference. |
| 672 | descDifferent = { |
| 673 | configurable:false, |
| 674 | enumerable:false, |
| 675 | writable:false, |
| 676 | value:2000 |
| 677 | }; |
| 678 | // Make sure we can still redefine if all properties are the same. |
| 679 | Object.defineProperty(obj5, 'bar', descDifferent); |
| 680 | |
| 681 | // Make sure that obj5 still holds the original values. |
| 682 | desc = Object.getOwnPropertyDescriptor(obj5, 'bar'); |
| 683 | assertEquals(desc.value, 2000); |
| 684 | assertFalse(desc.writable); |
| 685 | assertFalse(desc.enumerable); |
| 686 | assertFalse(desc.configurable); |
| 687 | |
| 688 | |
| 689 | // Make sure that we can't overwrite +0 with -0 and vice versa. |
| 690 | var descMinusZero = {value: -0, configurable: false}; |
| 691 | var descPlusZero = {value: +0, configurable: false}; |
| 692 | |
| 693 | Object.defineProperty(obj5, 'minuszero', descMinusZero); |
| 694 | |
| 695 | // Make sure we can redefine with -0. |
| 696 | Object.defineProperty(obj5, 'minuszero', descMinusZero); |
| 697 | |
| 698 | try { |
| 699 | Object.defineProperty(obj5, 'minuszero', descPlusZero); |
| 700 | assertUnreachable(); |
| 701 | } catch (e) { |
| 702 | assertTrue(/Cannot redefine property/.test(e)); |
| 703 | } |
| 704 | |
| 705 | |
| 706 | Object.defineProperty(obj5, 'pluszero', descPlusZero); |
| 707 | |
| 708 | // Make sure we can redefine with +0. |
| 709 | Object.defineProperty(obj5, 'pluszero', descPlusZero); |
| 710 | |
| 711 | try { |
| 712 | Object.defineProperty(obj5, 'pluszero', descMinusZero); |
| 713 | assertUnreachable(); |
| 714 | } catch (e) { |
| 715 | assertTrue(/Cannot redefine property/.test(e)); |
| 716 | } |