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| 1 // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // Flags: --harmony-unscopables |
| 6 // Flags: --harmony-collections |
| 7 |
| 8 var global = this; |
| 9 var globalProto = Object.getPrototypeOf(global); |
| 10 |
| 11 // Number of objects being tested. There is an assert ensuring this is correct. |
| 12 var objectCount = 21; |
| 13 |
| 14 |
| 15 function runTest(f) { |
| 16 function restore(object, oldProto) { |
| 17 delete object[Symbol.unscopables]; |
| 18 delete object.x; |
| 19 delete object.x_; |
| 20 delete object.y; |
| 21 delete object.z; |
| 22 Object.setPrototypeOf(object, oldProto); |
| 23 } |
| 24 |
| 25 function getObject(i) { |
| 26 var objects = [ |
| 27 {}, |
| 28 [], |
| 29 function() {}, |
| 30 function() { |
| 31 return arguments; |
| 32 }(), |
| 33 function() { |
| 34 'use strict'; |
| 35 return arguments; |
| 36 }(), |
| 37 Object(1), |
| 38 Object(true), |
| 39 Object('bla'), |
| 40 new Date, |
| 41 new RegExp, |
| 42 new Set, |
| 43 new Map, |
| 44 new WeakMap, |
| 45 new WeakSet, |
| 46 new ArrayBuffer(10), |
| 47 new Int32Array(5), |
| 48 Object, |
| 49 Function, |
| 50 Date, |
| 51 RegExp, |
| 52 global |
| 53 ]; |
| 54 |
| 55 assertEquals(objectCount, objects.length); |
| 56 return objects[i]; |
| 57 } |
| 58 |
| 59 if (f.length === 1) { |
| 60 for (var i = 0; i < objectCount; i++) { |
| 61 var object = getObject(i); |
| 62 var oldObjectProto = Object.getPrototypeOf(object); |
| 63 f(object); |
| 64 restore(object, oldObjectProto); |
| 65 } |
| 66 } else { |
| 67 for (var i = 0; i < objectCount; i++) { |
| 68 for (var j = 0; j < objectCount; j++) { |
| 69 var object = getObject(i); |
| 70 var proto = getObject(j); |
| 71 if (object === proto) { |
| 72 continue; |
| 73 } |
| 74 var oldObjectProto = Object.getPrototypeOf(object); |
| 75 var oldProtoProto = Object.getPrototypeOf(proto); |
| 76 f(object, proto); |
| 77 restore(object, oldObjectProto); |
| 78 restore(proto, oldProtoProto); |
| 79 } |
| 80 } |
| 81 } |
| 82 } |
| 83 |
| 84 |
| 85 function TestBasics(object) { |
| 86 var x = 1; |
| 87 var y = 2; |
| 88 var z = 3; |
| 89 object.x = 4; |
| 90 object.y = 5; |
| 91 |
| 92 with (object) { |
| 93 assertEquals(4, x); |
| 94 assertEquals(5, y); |
| 95 assertEquals(3, z); |
| 96 } |
| 97 |
| 98 object[Symbol.unscopables] = {x: true}; |
| 99 with (object) { |
| 100 assertEquals(1, x); |
| 101 assertEquals(5, y); |
| 102 assertEquals(3, z); |
| 103 } |
| 104 |
| 105 object[Symbol.unscopables] = {x: 0, y: true}; |
| 106 with (object) { |
| 107 assertEquals(1, x); |
| 108 assertEquals(2, y); |
| 109 assertEquals(3, z); |
| 110 } |
| 111 } |
| 112 runTest(TestBasics); |
| 113 |
| 114 |
| 115 function TestUnscopableChain(object) { |
| 116 var x = 1; |
| 117 object.x = 2; |
| 118 |
| 119 with (object) { |
| 120 assertEquals(2, x); |
| 121 } |
| 122 |
| 123 object[Symbol.unscopables] = { |
| 124 __proto__: {x: true} |
| 125 }; |
| 126 with (object) { |
| 127 assertEquals(1, x); |
| 128 } |
| 129 } |
| 130 runTest(TestUnscopableChain); |
| 131 |
| 132 |
| 133 function TestBasicsSet(object) { |
| 134 var x = 1; |
| 135 object.x = 2; |
| 136 |
| 137 with (object) { |
| 138 assertEquals(2, x); |
| 139 } |
| 140 |
| 141 object[Symbol.unscopables] = {x: true}; |
| 142 with (object) { |
| 143 assertEquals(1, x); |
| 144 x = 3; |
| 145 assertEquals(3, x); |
| 146 } |
| 147 |
| 148 assertEquals(3, x); |
| 149 assertEquals(2, object.x); |
| 150 } |
| 151 runTest(TestBasicsSet); |
| 152 |
| 153 |
| 154 function TestOnProto(object, proto) { |
| 155 var x = 1; |
| 156 var y = 2; |
| 157 var z = 3; |
| 158 proto.x = 4; |
| 159 |
| 160 Object.setPrototypeOf(object, proto); |
| 161 object.y = 5; |
| 162 |
| 163 with (object) { |
| 164 assertEquals(4, x); |
| 165 assertEquals(5, y); |
| 166 assertEquals(3, z); |
| 167 } |
| 168 |
| 169 proto[Symbol.unscopables] = {x: true}; |
| 170 with (object) { |
| 171 assertEquals(1, x); |
| 172 assertEquals(5, y); |
| 173 assertEquals(3, z); |
| 174 } |
| 175 |
| 176 object[Symbol.unscopables] = {y: true}; |
| 177 with (object) { |
| 178 assertEquals(4, x); |
| 179 assertEquals(2, y); |
| 180 assertEquals(3, z); |
| 181 } |
| 182 |
| 183 proto[Symbol.unscopables] = {y: true}; |
| 184 object[Symbol.unscopables] = {x: true}; |
| 185 with (object) { |
| 186 assertEquals(1, x); |
| 187 assertEquals(5, y); |
| 188 assertEquals(3, z); |
| 189 } |
| 190 } |
| 191 runTest(TestOnProto); |
| 192 |
| 193 |
| 194 function TestSetBlockedOnProto(object, proto) { |
| 195 var x = 1; |
| 196 object.x = 2; |
| 197 |
| 198 with (object) { |
| 199 assertEquals(2, x); |
| 200 } |
| 201 |
| 202 Object.setPrototypeOf(object, proto); |
| 203 proto[Symbol.unscopables] = {x: true}; |
| 204 with (object) { |
| 205 assertEquals(1, x); |
| 206 x = 3; |
| 207 assertEquals(3, x); |
| 208 } |
| 209 |
| 210 assertEquals(3, x); |
| 211 assertEquals(2, object.x); |
| 212 } |
| 213 runTest(TestSetBlockedOnProto); |
| 214 |
| 215 |
| 216 function TestNonObject(object) { |
| 217 var x = 1; |
| 218 var y = 2; |
| 219 object.x = 3; |
| 220 object.y = 4; |
| 221 |
| 222 object[Symbol.unscopables] = 'xy'; |
| 223 with (object) { |
| 224 assertEquals(3, x); |
| 225 assertEquals(4, y); |
| 226 } |
| 227 |
| 228 object[Symbol.unscopables] = null; |
| 229 with (object) { |
| 230 assertEquals(3, x); |
| 231 assertEquals(4, y); |
| 232 } |
| 233 } |
| 234 runTest(TestNonObject); |
| 235 |
| 236 |
| 237 function TestChangeDuringWith(object) { |
| 238 var x = 1; |
| 239 var y = 2; |
| 240 object.x = 3; |
| 241 object.y = 4; |
| 242 |
| 243 with (object) { |
| 244 assertEquals(3, x); |
| 245 assertEquals(4, y); |
| 246 object[Symbol.unscopables] = {x: true}; |
| 247 assertEquals(1, x); |
| 248 assertEquals(4, y); |
| 249 } |
| 250 } |
| 251 runTest(TestChangeDuringWith); |
| 252 |
| 253 |
| 254 function TestChangeDuringWithWithPossibleOptimization(object) { |
| 255 var x = 1; |
| 256 object.x = 2; |
| 257 with (object) { |
| 258 for (var i = 0; i < 1000; i++) { |
| 259 if (i === 500) object[Symbol.unscopables] = {x: true}; |
| 260 assertEquals(i < 500 ? 2: 1, x); |
| 261 } |
| 262 } |
| 263 } |
| 264 TestChangeDuringWithWithPossibleOptimization({}); |
| 265 |
| 266 |
| 267 function TestChangeDuringWithWithPossibleOptimization2(object) { |
| 268 var x = 1; |
| 269 object.x = 2; |
| 270 object[Symbol.unscopables] = {x: true}; |
| 271 with (object) { |
| 272 for (var i = 0; i < 1000; i++) { |
| 273 if (i === 500) delete object[Symbol.unscopables]; |
| 274 assertEquals(i < 500 ? 1 : 2, x); |
| 275 } |
| 276 } |
| 277 } |
| 278 TestChangeDuringWithWithPossibleOptimization2({}); |
| 279 |
| 280 |
| 281 function TestChangeDuringWithWithPossibleOptimization3(object) { |
| 282 var x = 1; |
| 283 object.x = 2; |
| 284 object[Symbol.unscopables] = {}; |
| 285 with (object) { |
| 286 for (var i = 0; i < 1000; i++) { |
| 287 if (i === 500) object[Symbol.unscopables].x = true; |
| 288 assertEquals(i < 500 ? 2 : 1, x); |
| 289 } |
| 290 } |
| 291 } |
| 292 TestChangeDuringWithWithPossibleOptimization3({}); |
| 293 |
| 294 |
| 295 function TestChangeDuringWithWithPossibleOptimization4(object) { |
| 296 var x = 1; |
| 297 object.x = 2; |
| 298 object[Symbol.unscopables] = {x: true}; |
| 299 with (object) { |
| 300 for (var i = 0; i < 1000; i++) { |
| 301 if (i === 500) delete object[Symbol.unscopables].x; |
| 302 assertEquals(i < 500 ? 1 : 2, x); |
| 303 } |
| 304 } |
| 305 } |
| 306 TestChangeDuringWithWithPossibleOptimization4({}); |
| 307 |
| 308 |
| 309 function TestAccessorReceiver(object, proto) { |
| 310 var x = 'local'; |
| 311 |
| 312 Object.defineProperty(proto, 'x', { |
| 313 get: function() { |
| 314 assertEquals(object, this); |
| 315 return this.x_; |
| 316 }, |
| 317 configurable: true |
| 318 }); |
| 319 proto.x_ = 'proto'; |
| 320 |
| 321 Object.setPrototypeOf(object, proto); |
| 322 proto.x_ = 'object'; |
| 323 |
| 324 with (object) { |
| 325 assertEquals('object', x); |
| 326 } |
| 327 } |
| 328 runTest(TestAccessorReceiver); |
| 329 |
| 330 |
| 331 function TestUnscopablesGetter(object) { |
| 332 // This test gets really messy when object is the global since the assert |
| 333 // functions are properties on the global object and the call count gets |
| 334 // completely different. |
| 335 if (object === global) return; |
| 336 |
| 337 var x = 'local'; |
| 338 object.x = 'object'; |
| 339 |
| 340 var callCount = 0; |
| 341 Object.defineProperty(object, Symbol.unscopables, { |
| 342 get: function() { |
| 343 callCount++; |
| 344 return {}; |
| 345 }, |
| 346 configurable: true |
| 347 }); |
| 348 with (object) { |
| 349 assertEquals('object', x); |
| 350 } |
| 351 // Once for HasBinding |
| 352 assertEquals(1, callCount); |
| 353 |
| 354 callCount = 0; |
| 355 Object.defineProperty(object, Symbol.unscopables, { |
| 356 get: function() { |
| 357 callCount++; |
| 358 return {x: true}; |
| 359 }, |
| 360 configurable: true |
| 361 }); |
| 362 with (object) { |
| 363 assertEquals('local', x); |
| 364 } |
| 365 // Once for HasBinding |
| 366 assertEquals(1, callCount); |
| 367 |
| 368 callCount = 0; |
| 369 Object.defineProperty(object, Symbol.unscopables, { |
| 370 get: function() { |
| 371 callCount++; |
| 372 return callCount == 1 ? {} : {x: true}; |
| 373 }, |
| 374 configurable: true |
| 375 }); |
| 376 with (object) { |
| 377 x = 1; |
| 378 } |
| 379 // Once for HasBinding |
| 380 assertEquals(1, callCount); |
| 381 assertEquals(1, object.x); |
| 382 assertEquals('local', x); |
| 383 with (object) { |
| 384 x = 2; |
| 385 } |
| 386 // One more HasBinding. |
| 387 assertEquals(2, callCount); |
| 388 assertEquals(1, object.x); |
| 389 assertEquals(2, x); |
| 390 } |
| 391 runTest(TestUnscopablesGetter); |
| 392 |
| 393 |
| 394 var global = this; |
| 395 function TestUnscopablesGetter2() { |
| 396 var x = 'local'; |
| 397 |
| 398 var globalProto = Object.getPrototypeOf(global); |
| 399 var protos = [{}, [], function() {}, global]; |
| 400 var objects = [{}, [], function() {}]; |
| 401 |
| 402 protos.forEach(function(proto) { |
| 403 objects.forEach(function(object) { |
| 404 Object.defineProperty(proto, 'x', { |
| 405 get: function() { |
| 406 assertEquals(object, this); |
| 407 return 'proto'; |
| 408 }, |
| 409 configurable: true |
| 410 }); |
| 411 |
| 412 object.__proto__ = proto; |
| 413 Object.defineProperty(object, 'x', { |
| 414 get: function() { |
| 415 assertEquals(object, this); |
| 416 return 'object'; |
| 417 }, |
| 418 configurable: true |
| 419 }); |
| 420 |
| 421 with (object) { |
| 422 assertEquals('object', x); |
| 423 } |
| 424 |
| 425 object[Symbol.unscopables] = {x: true}; |
| 426 with (object) { |
| 427 assertEquals('local', x); |
| 428 } |
| 429 |
| 430 delete proto[Symbol.unscopables]; |
| 431 delete object[Symbol.unscopables]; |
| 432 }); |
| 433 }); |
| 434 |
| 435 delete global.x; |
| 436 Object.setPrototypeOf(global, globalProto); |
| 437 } |
| 438 TestUnscopablesGetter2(); |
| 439 |
| 440 |
| 441 function TestSetterOnBlacklisted(object, proto) { |
| 442 var x = 'local'; |
| 443 Object.defineProperty(proto, 'x', { |
| 444 set: function(x) { |
| 445 assertUnreachable(); |
| 446 }, |
| 447 get: function() { |
| 448 return 'proto'; |
| 449 }, |
| 450 configurable: true |
| 451 }); |
| 452 Object.setPrototypeOf(object, proto); |
| 453 Object.defineProperty(object, 'x', { |
| 454 get: function() { |
| 455 return this.x_; |
| 456 }, |
| 457 set: function(x) { |
| 458 this.x_ = x; |
| 459 }, |
| 460 configurable: true |
| 461 }); |
| 462 object.x_ = 1; |
| 463 |
| 464 with (object) { |
| 465 x = 2; |
| 466 assertEquals(2, x); |
| 467 } |
| 468 |
| 469 assertEquals(2, object.x); |
| 470 |
| 471 object[Symbol.unscopables] = {x: true}; |
| 472 |
| 473 with (object) { |
| 474 x = 3; |
| 475 assertEquals(3, x); |
| 476 } |
| 477 |
| 478 assertEquals(2, object.x); |
| 479 } |
| 480 runTest(TestSetterOnBlacklisted); |
| 481 |
| 482 |
| 483 function TestObjectsAsUnscopables(object, unscopables) { |
| 484 var x = 1; |
| 485 object.x = 2; |
| 486 |
| 487 with (object) { |
| 488 assertEquals(2, x); |
| 489 object[Symbol.unscopables] = unscopables; |
| 490 assertEquals(2, x); |
| 491 } |
| 492 } |
| 493 runTest(TestObjectsAsUnscopables); |
| 494 |
| 495 |
| 496 function TestAccessorOnUnscopables(object) { |
| 497 var x = 1; |
| 498 object.x = 2; |
| 499 |
| 500 var unscopables = { |
| 501 get x() { |
| 502 assertUnreachable(); |
| 503 } |
| 504 }; |
| 505 |
| 506 with (object) { |
| 507 assertEquals(2, x); |
| 508 object[Symbol.unscopables] = unscopables; |
| 509 assertEquals(1, x); |
| 510 } |
| 511 } |
| 512 runTest(TestAccessorOnUnscopables); |
| 513 |
| 514 |
| 515 function TestLengthUnscopables(object, proto) { |
| 516 var length = 2; |
| 517 with (object) { |
| 518 assertEquals(1, length); |
| 519 object[Symbol.unscopables] = {length: true}; |
| 520 assertEquals(2, length); |
| 521 delete object[Symbol.unscopables]; |
| 522 assertEquals(1, length); |
| 523 } |
| 524 } |
| 525 TestLengthUnscopables([1], Array.prototype); |
| 526 TestLengthUnscopables(function(x) {}, Function.prototype); |
| 527 TestLengthUnscopables(new String('x'), String.prototype); |
| 528 |
| 529 |
| 530 function TestFunctionNameUnscopables(object) { |
| 531 var name = 'local'; |
| 532 with (object) { |
| 533 assertEquals('f', name); |
| 534 object[Symbol.unscopables] = {name: true}; |
| 535 assertEquals('local', name); |
| 536 delete object[Symbol.unscopables]; |
| 537 assertEquals('f', name); |
| 538 } |
| 539 } |
| 540 TestFunctionNameUnscopables(function f() {}); |
| 541 |
| 542 |
| 543 function TestFunctionPrototypeUnscopables() { |
| 544 var prototype = 'local'; |
| 545 var f = function() {}; |
| 546 var g = function() {}; |
| 547 Object.setPrototypeOf(f, g); |
| 548 var fp = f.prototype; |
| 549 var gp = g.prototype; |
| 550 with (f) { |
| 551 assertEquals(fp, prototype); |
| 552 f[Symbol.unscopables] = {prototype: true}; |
| 553 assertEquals('local', prototype); |
| 554 delete f[Symbol.unscopables]; |
| 555 assertEquals(fp, prototype); |
| 556 } |
| 557 } |
| 558 TestFunctionPrototypeUnscopables(function() {}); |
| 559 |
| 560 |
| 561 function TestFunctionArgumentsUnscopables() { |
| 562 var func = function() { |
| 563 var arguments = 'local'; |
| 564 var args = func.arguments; |
| 565 with (func) { |
| 566 assertEquals(args, arguments); |
| 567 func[Symbol.unscopables] = {arguments: true}; |
| 568 assertEquals('local', arguments); |
| 569 delete func[Symbol.unscopables]; |
| 570 assertEquals(args, arguments); |
| 571 } |
| 572 } |
| 573 func(1); |
| 574 } |
| 575 TestFunctionArgumentsUnscopables(); |
| 576 |
| 577 |
| 578 function TestArgumentsLengthUnscopables() { |
| 579 var func = function() { |
| 580 var length = 'local'; |
| 581 with (arguments) { |
| 582 assertEquals(1, length); |
| 583 arguments[Symbol.unscopables] = {length: true}; |
| 584 assertEquals('local', length); |
| 585 } |
| 586 } |
| 587 func(1); |
| 588 } |
| 589 TestArgumentsLengthUnscopables(); |
| 590 |
| 591 |
| 592 function TestFunctionCallerUnscopables() { |
| 593 var func = function() { |
| 594 var caller = 'local'; |
| 595 with (func) { |
| 596 assertEquals(TestFunctionCallerUnscopables, caller); |
| 597 func[Symbol.unscopables] = {caller: true}; |
| 598 assertEquals('local', caller); |
| 599 delete func[Symbol.unscopables]; |
| 600 assertEquals(TestFunctionCallerUnscopables, caller); |
| 601 } |
| 602 } |
| 603 func(1); |
| 604 } |
| 605 TestFunctionCallerUnscopables(); |
| 606 |
| 607 |
| 608 function TestGetUnscopablesGetterThrows() { |
| 609 var object = { |
| 610 get x() { |
| 611 assertUnreachable(); |
| 612 } |
| 613 }; |
| 614 function CustomError() {} |
| 615 Object.defineProperty(object, Symbol.unscopables, { |
| 616 get: function() { |
| 617 throw new CustomError(); |
| 618 } |
| 619 }); |
| 620 assertThrows(function() { |
| 621 with (object) { |
| 622 x; |
| 623 } |
| 624 }, CustomError); |
| 625 } |
| 626 TestGetUnscopablesGetterThrows(); |
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