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| 1 // Copyright 2016 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-async-iteration --allow-natives-syntax |
| 6 |
| 7 let testFailed = false; |
| 8 let testFailure; |
| 9 (async function() { |
| 10 const kNext = 1; |
| 11 const kThrow = 2; |
| 12 const kReturn = 4; |
| 13 |
| 14 function async(iterable, features = kNext, log = []) { |
| 15 // Helper to turn a synchronous iterable into an asynchronous iterable, |
| 16 // without using the [Async-from-Sync Iterator]. |
| 17 let it = iterable[Symbol.iterator](); |
| 18 let methods = { |
| 19 next(sentValue) { |
| 20 return new Promise(function(resolve, reject) { |
| 21 let {value, done} = it.next(sentValue); |
| 22 Promise.resolve(value).then(function(value) { |
| 23 log.push(".next() -> resolved " + value); |
| 24 resolve({value, done}); |
| 25 }, function(value) { |
| 26 log.push(".next() -> rejected " + value); |
| 27 reject(value); |
| 28 }); |
| 29 }); |
| 30 }, |
| 31 |
| 32 throw(sentValue) { |
| 33 return new Promise(function(resolve, reject) { |
| 34 let throwMethod = it.throw; |
| 35 if (typeof throwMethod !== "function") { |
| 36 log.push(".throw(" + sentValue + ")"); |
| 37 return reject(sentValue); |
| 38 } |
| 39 |
| 40 let {value, done} = throwMethod.call(it, sentValue); |
| 41 Promise.resolve(value).then(function(value) { |
| 42 log.push(".throw() -> resolved " + value); |
| 43 resolve({ value, done }); |
| 44 }, function(value) { |
| 45 log.push(".throw() -> rejected " + value); |
| 46 reject(value); |
| 47 }); |
| 48 }); |
| 49 }, |
| 50 |
| 51 return(sentValue) { |
| 52 return new Promise(function(resolve, reject) { |
| 53 let returnMethod = it.return; |
| 54 if (typeof returnMethod !== "function") { |
| 55 log.push(".return(" + sentValue + ")"); |
| 56 return resolve({value: sentValue, done: true}); |
| 57 } |
| 58 |
| 59 let {value, done} = returnMethod.call(it, sentValue); |
| 60 Promise.resolve(value).then(function(value) { |
| 61 log.push(".return() -> resolved " + value); |
| 62 resolve({ value, done }); |
| 63 }, function(value) { |
| 64 log.push(".return() -> rejected " + value); |
| 65 reject(value); |
| 66 }); |
| 67 }); |
| 68 } |
| 69 }; |
| 70 |
| 71 |
| 72 return { |
| 73 [Symbol.asyncIterator]() { |
| 74 log.push("[Symbol.asyncIterator]()") |
| 75 return this; |
| 76 }, |
| 77 |
| 78 next: (features & kNext) ? methods.next : undefined, |
| 79 throw: (features & kThrow) ? methods.throw : undefined, |
| 80 return: (features & kReturn) ? methods.return : undefined |
| 81 }; |
| 82 } |
| 83 |
| 84 let testDone; |
| 85 let test; |
| 86 async function testBindingIdentifierVarDeclarationStatement() { |
| 87 let sum = 0; |
| 88 testDone = false; |
| 89 for await(var value of async([100, 200, 300, 400, 500])) sum += value; |
| 90 testDone = true; |
| 91 return sum; |
| 92 } |
| 93 |
| 94 test = testBindingIdentifierVarDeclarationStatement(); |
| 95 assertFalse(testDone); |
| 96 assertEquals(1500, await test); |
| 97 assertTrue(testDone); |
| 98 |
| 99 async function testBindingIdentifierVarDeclarationBlockStatement() { |
| 100 let sum = 0; |
| 101 testDone = false; |
| 102 for await(var value of async([100, 200, 300, 400, 500])) { |
| 103 'use strict'; |
| 104 let strict = (function() { return this === undefined; })(); |
| 105 assertFalse(strict); |
| 106 sum += value; |
| 107 } |
| 108 testDone = true; |
| 109 return sum; |
| 110 } |
| 111 |
| 112 test = testBindingIdentifierVarDeclarationBlockStatement(); |
| 113 assertFalse(testDone); |
| 114 assertEquals(1500, await test); |
| 115 assertTrue(testDone); |
| 116 |
| 117 async function testObjectBindingPatternVarDeclarationStatement() { |
| 118 let sum = 0, keys = []; |
| 119 let collection = [ |
| 120 {key: 'first', value: 10}, {key: undefined, value: 20}, {value: 30}, |
| 121 {key: 'last', value: 40} |
| 122 ]; |
| 123 testDone = false; |
| 124 for await(var {key = 'unknown', value} of async(collection)) |
| 125 keys.push(key), sum += value; |
| 126 testDone = true; |
| 127 return {keys, sum}; |
| 128 } |
| 129 |
| 130 test = testObjectBindingPatternVarDeclarationStatement(); |
| 131 assertFalse(testDone); |
| 132 assertEquals( |
| 133 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 134 assertTrue(testDone); |
| 135 |
| 136 async function testObjectBindingPatternVarDeclarationBlockStatement() { |
| 137 let sum = 0, keys = []; |
| 138 let collection = [ |
| 139 {key: 'first', value: 10}, {key: undefined, value: 20}, {value: 30}, |
| 140 {key: 'last', value: 40} |
| 141 ]; |
| 142 testDone = false; |
| 143 for await(var {key = 'unknown', value} of async(collection)) { |
| 144 'use strict'; |
| 145 let strict = (function() { return this === undefined; })(); |
| 146 assertFalse(strict); |
| 147 keys.push(key); |
| 148 sum += value; |
| 149 } |
| 150 testDone = true; |
| 151 return {keys, sum}; |
| 152 } |
| 153 |
| 154 test = testObjectBindingPatternVarDeclarationBlockStatement(); |
| 155 assertFalse(testDone); |
| 156 assertEquals( |
| 157 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 158 assertTrue(testDone); |
| 159 |
| 160 async function testArrayBindingPatternVarDeclarationStatement() { |
| 161 let sum = 0, keys = []; |
| 162 let collection = [['first', 10], [undefined, 20], [, 30], ['last', 40]]; |
| 163 testDone = false; |
| 164 for await(var [key = 'unknown', value] of async(collection)) |
| 165 keys.push(key), sum += value; |
| 166 testDone = true; |
| 167 return {keys, sum}; |
| 168 } |
| 169 |
| 170 test = testArrayBindingPatternVarDeclarationStatement(); |
| 171 assertFalse(testDone); |
| 172 assertEquals( |
| 173 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 174 assertTrue(testDone); |
| 175 |
| 176 async function testArrayBindingPatternVarDeclarationBlockStatement() { |
| 177 let sum = 0, keys = []; |
| 178 let collection = [['first', 10], [undefined, 20], [, 30], ['last', 40]]; |
| 179 testDone = false; |
| 180 for await(var [key = 'unknown', value] of async(collection)) { |
| 181 'use strict'; |
| 182 let strict = (function() { return this === undefined; })(); |
| 183 assertFalse(strict); |
| 184 keys.push(key); |
| 185 sum += value; |
| 186 } |
| 187 testDone = true; |
| 188 return {keys, sum}; |
| 189 } |
| 190 |
| 191 test = testArrayBindingPatternVarDeclarationBlockStatement(); |
| 192 assertFalse(testDone); |
| 193 assertEquals( |
| 194 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 195 assertTrue(testDone); |
| 196 |
| 197 // -------------------------------------------------------------------------- |
| 198 |
| 199 async function testBindingIdentifierLetDeclarationStatement() { |
| 200 let sum = 0; |
| 201 testDone = false; |
| 202 for await(let value of async([100, 200, 300, 400, 500])) sum += value; |
| 203 testDone = true; |
| 204 return sum; |
| 205 } |
| 206 |
| 207 test = testBindingIdentifierLetDeclarationStatement(); |
| 208 assertFalse(testDone); |
| 209 assertEquals(1500, await test); |
| 210 assertTrue(testDone); |
| 211 |
| 212 async function testBindingIdentifierLetDeclarationBlockStatement() { |
| 213 let sum = 0; |
| 214 testDone = false; |
| 215 for await(let value of async([100, 200, 300, 400, 500])) { |
| 216 'use strict'; |
| 217 let strict = (function() { return this === undefined; })(); |
| 218 assertFalse(strict); |
| 219 sum += value; |
| 220 } |
| 221 testDone = true; |
| 222 return sum; |
| 223 } |
| 224 |
| 225 test = testBindingIdentifierLetDeclarationBlockStatement(); |
| 226 assertFalse(testDone); |
| 227 assertEquals(1500, await test); |
| 228 assertTrue(testDone); |
| 229 |
| 230 async function testObjectBindingPatternLetDeclarationStatement() { |
| 231 let sum = 0, keys = []; |
| 232 let collection = [ |
| 233 {key: 'first', value: 10}, {key: undefined, value: 20}, {value: 30}, |
| 234 {key: 'last', value: 40} |
| 235 ]; |
| 236 testDone = false; |
| 237 for await(let {key = 'unknown', value} of async(collection)) |
| 238 keys.push(key), sum += value; |
| 239 testDone = true; |
| 240 return {keys, sum}; |
| 241 } |
| 242 |
| 243 test = testObjectBindingPatternLetDeclarationStatement(); |
| 244 assertFalse(testDone); |
| 245 assertEquals( |
| 246 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 247 assertTrue(testDone); |
| 248 |
| 249 async function testObjectBindingPatternLetDeclarationBlockStatement() { |
| 250 let sum = 0, keys = []; |
| 251 let collection = [ |
| 252 {key: 'first', value: 10}, {key: undefined, value: 20}, {value: 30}, |
| 253 {key: 'last', value: 40} |
| 254 ]; |
| 255 testDone = false; |
| 256 for await(let {key = 'unknown', value} of async(collection)) { |
| 257 'use strict'; |
| 258 let strict = (function() { return this === undefined; })(); |
| 259 assertFalse(strict); |
| 260 keys.push(key); |
| 261 sum += value; |
| 262 } |
| 263 testDone = true; |
| 264 return {keys, sum}; |
| 265 } |
| 266 |
| 267 test = testObjectBindingPatternLetDeclarationBlockStatement(); |
| 268 assertFalse(testDone); |
| 269 assertEquals( |
| 270 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 271 assertTrue(testDone); |
| 272 |
| 273 async function testArrayBindingPatternLetDeclarationStatement() { |
| 274 let sum = 0, keys = []; |
| 275 let collection = [['first', 10], [undefined, 20], [, 30], ['last', 40]]; |
| 276 testDone = false; |
| 277 for await(let [key = 'unknown', value] of async(collection)) |
| 278 keys.push(key), sum += value; |
| 279 testDone = true; |
| 280 return {keys, sum}; |
| 281 } |
| 282 |
| 283 test = testArrayBindingPatternLetDeclarationStatement(); |
| 284 assertFalse(testDone); |
| 285 assertEquals( |
| 286 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 287 assertTrue(testDone); |
| 288 |
| 289 async function testArrayBindingPatternLetDeclarationBlockStatement() { |
| 290 let sum = 0, keys = []; |
| 291 let collection = [['first', 10], [undefined, 20], [, 30], ['last', 40]]; |
| 292 testDone = false; |
| 293 for await(let [key = 'unknown', value] of async(collection)) { |
| 294 'use strict'; |
| 295 let strict = (function() { return this === undefined; })(); |
| 296 assertFalse(strict); |
| 297 keys.push(key); |
| 298 sum += value; |
| 299 } |
| 300 testDone = true; |
| 301 return {keys, sum}; |
| 302 } |
| 303 |
| 304 test = testArrayBindingPatternLetDeclarationBlockStatement(); |
| 305 assertFalse(testDone); |
| 306 assertEquals( |
| 307 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 308 assertTrue(testDone); |
| 309 |
| 310 // -------------------------------------------------------------------------- |
| 311 |
| 312 async function testBindingIdentifierConstDeclarationStatement() { |
| 313 let sum = 0; |
| 314 testDone = false; |
| 315 for await(let value of async([100, 200, 300, 400, 500])) sum += value; |
| 316 testDone = true; |
| 317 return sum; |
| 318 } |
| 319 |
| 320 test = testBindingIdentifierConstDeclarationStatement(); |
| 321 assertFalse(testDone); |
| 322 assertEquals(1500, await test); |
| 323 assertTrue(testDone); |
| 324 |
| 325 async function testBindingIdentifierConstDeclarationBlockStatement() { |
| 326 let sum = 0; |
| 327 testDone = false; |
| 328 for await(const value of async([100, 200, 300, 400, 500])) { |
| 329 'use strict'; |
| 330 // Ensure strict mode applies to block with use-strict-directive |
| 331 let strict = (function() { return this === undefined; })(); |
| 332 assertFalse(strict); |
| 333 sum += value; |
| 334 } |
| 335 testDone = true; |
| 336 return sum; |
| 337 } |
| 338 |
| 339 test = testBindingIdentifierConstDeclarationBlockStatement(); |
| 340 assertFalse(testDone); |
| 341 assertEquals(1500, await test); |
| 342 assertTrue(testDone); |
| 343 |
| 344 async function testObjectBindingPatternConstDeclarationStatement() { |
| 345 let sum = 0, keys = []; |
| 346 let collection = [ |
| 347 {key: 'first', value: 10}, {key: undefined, value: 20}, {value: 30}, |
| 348 {key: 'last', value: 40} |
| 349 ]; |
| 350 testDone = false; |
| 351 for await(const {key = 'unknown', value} of async(collection)) |
| 352 keys.push(key), sum += value; |
| 353 testDone = true; |
| 354 return {keys, sum}; |
| 355 } |
| 356 |
| 357 test = testObjectBindingPatternConstDeclarationStatement(); |
| 358 assertFalse(testDone); |
| 359 assertEquals( |
| 360 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 361 assertTrue(testDone); |
| 362 |
| 363 async function testObjectBindingPatternConstDeclarationBlockStatement() { |
| 364 let sum = 0, keys = []; |
| 365 let collection = [ |
| 366 {key: 'first', value: 10}, {key: undefined, value: 20}, {value: 30}, |
| 367 {key: 'last', value: 40} |
| 368 ]; |
| 369 testDone = false; |
| 370 for await(const {key = 'unknown', value} of async(collection)) { |
| 371 'use strict'; |
| 372 let strict = (function() { return this === undefined; })(); |
| 373 assertFalse(strict); |
| 374 keys.push(key); |
| 375 sum += value; |
| 376 } |
| 377 testDone = true; |
| 378 return {keys, sum}; |
| 379 } |
| 380 |
| 381 test = testObjectBindingPatternConstDeclarationBlockStatement(); |
| 382 assertFalse(testDone); |
| 383 assertEquals( |
| 384 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 385 assertTrue(testDone); |
| 386 |
| 387 async function testArrayBindingPatternConstDeclarationStatement() { |
| 388 let sum = 0, keys = []; |
| 389 let collection = [['first', 10], [undefined, 20], [, 30], ['last', 40]]; |
| 390 testDone = false; |
| 391 for await(const [key = 'unknown', value] of async(collection)) |
| 392 keys.push(key), sum += value; |
| 393 testDone = true; |
| 394 return {keys, sum}; |
| 395 } |
| 396 |
| 397 test = testArrayBindingPatternConstDeclarationStatement(); |
| 398 assertFalse(testDone); |
| 399 assertEquals( |
| 400 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 401 assertTrue(testDone); |
| 402 |
| 403 async function testArrayBindingPatternConstDeclarationBlockStatement() { |
| 404 let sum = 0, keys = []; |
| 405 let collection = [['first', 10], [undefined, 20], [, 30], ['last', 40]]; |
| 406 testDone = false; |
| 407 for await(const [key = 'unknown', value] of async(collection)) { |
| 408 'use strict'; |
| 409 let strict = (function() { return this === undefined; })(); |
| 410 assertFalse(strict); |
| 411 keys.push(key); |
| 412 sum += value; |
| 413 } |
| 414 testDone = true; |
| 415 return {keys, sum}; |
| 416 } |
| 417 |
| 418 test = testArrayBindingPatternLetDeclarationBlockStatement(); |
| 419 assertFalse(testDone); |
| 420 assertEquals( |
| 421 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 100}, await test); |
| 422 assertTrue(testDone); |
| 423 |
| 424 // -------------------------------------------------------------------------- |
| 425 |
| 426 async function testBindingIdentifierLHSStatement() { |
| 427 let sum = 0; |
| 428 let value; |
| 429 testDone = false; |
| 430 for await(value of async([100, 200, 300, 400, 500])) sum += value; |
| 431 testDone = true; |
| 432 return sum; |
| 433 } |
| 434 |
| 435 test = testBindingIdentifierLHSStatement(); |
| 436 assertFalse(testDone); |
| 437 assertEquals(1500, await test); |
| 438 assertTrue(testDone); |
| 439 |
| 440 async function testBindingIdentifierLHSBlockStatement() { |
| 441 let sum = 0; |
| 442 let value; |
| 443 testDone = false; |
| 444 for await(value of async([100, 200, 300, 400, 500])) { |
| 445 'use strict'; |
| 446 let strict = (function() { return this === undefined; })(); |
| 447 assertFalse(strict); |
| 448 sum += value; |
| 449 } |
| 450 testDone = true; |
| 451 return sum; |
| 452 } |
| 453 |
| 454 test = testBindingIdentifierLHSStatement(); |
| 455 assertFalse(testDone); |
| 456 assertEquals(1500, await test); |
| 457 assertTrue(testDone); |
| 458 |
| 459 async function testObjectBindingPatternLHSStatement() { |
| 460 let sum = 0; |
| 461 let keys = []; |
| 462 let value; |
| 463 let key; |
| 464 let collection = [ |
| 465 {key: 'first', value: 1}, {key: undefined, value: 2}, {value: 3}, |
| 466 {key: 'last', value: 4} |
| 467 ]; |
| 468 testDone = false; |
| 469 for await({key = 'unknown', value} of async(collection)) |
| 470 keys.push(key), sum += value; |
| 471 testDone = true; |
| 472 return {keys, sum}; |
| 473 } |
| 474 |
| 475 test = testObjectBindingPatternLHSStatement(); |
| 476 assertFalse(testDone); |
| 477 assertEquals( |
| 478 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 10}, await test); |
| 479 assertTrue(testDone); |
| 480 |
| 481 async function testObjectBindingPatternLHSBlockStatement() { |
| 482 let sum = 0; |
| 483 let keys = []; |
| 484 let value; |
| 485 let key; |
| 486 let collection = [ |
| 487 {key: 'first', value: 1}, {key: undefined, value: 2}, {value: 3}, |
| 488 {key: 'last', value: 4} |
| 489 ]; |
| 490 testDone = false; |
| 491 for await({key = 'unknown', value} of async(collection)) { |
| 492 'use strict'; |
| 493 let strict = (function() { return this === undefined; })(); |
| 494 assertFalse(strict); |
| 495 keys.push(key); |
| 496 sum += value; |
| 497 } |
| 498 testDone = true; |
| 499 return {keys, sum}; |
| 500 } |
| 501 |
| 502 test = testObjectBindingPatternLHSBlockStatement(); |
| 503 assertFalse(testDone); |
| 504 assertEquals( |
| 505 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 10}, await test); |
| 506 assertTrue(testDone); |
| 507 |
| 508 async function testArrayBindingPatternLHSStatement() { |
| 509 let sum = 0; |
| 510 let keys = []; |
| 511 let value; |
| 512 let key; |
| 513 let collection = [['first', 1], [undefined, 2], [, 3], ['last', 4]]; |
| 514 testDone = false; |
| 515 for await([key = 'unknown', value] of async(collection)) { |
| 516 'use strict'; |
| 517 let strict = (function() { return this === undefined; })(); |
| 518 assertFalse(strict); |
| 519 keys.push(key); |
| 520 sum += value; |
| 521 } |
| 522 testDone = true; |
| 523 return {keys, sum}; |
| 524 } |
| 525 |
| 526 test = testArrayBindingPatternLHSStatement(); |
| 527 assertFalse(testDone); |
| 528 assertEquals( |
| 529 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 10}, await test); |
| 530 assertTrue(testDone); |
| 531 |
| 532 async function testArrayBindingPatternLHSBlockStatement() { |
| 533 let sum = 0; |
| 534 let keys = []; |
| 535 let value; |
| 536 let key; |
| 537 let collection = [ |
| 538 {key: 'first', value: 1}, {key: undefined, value: 2}, {value: 3}, |
| 539 {key: 'last', value: 4} |
| 540 ]; |
| 541 testDone = false; |
| 542 for await({key = 'unknown', value} of async(collection)) { |
| 543 'use strict'; |
| 544 let strict = (function() { return this === undefined; })(); |
| 545 assertFalse(strict); |
| 546 keys.push(key); |
| 547 sum += value; |
| 548 } |
| 549 testDone = true; |
| 550 return {keys, sum}; |
| 551 } |
| 552 |
| 553 test = testArrayBindingPatternLHSBlockStatement(); |
| 554 assertFalse(testDone); |
| 555 assertEquals( |
| 556 {keys: ['first', 'unknown', 'unknown', 'last'], sum: 10}, await test); |
| 557 assertTrue(testDone); |
| 558 |
| 559 // -------------------------------------------------------------------------- |
| 560 |
| 561 async function testBreakStatementReturnMethodNotPresent() { |
| 562 let log = []; |
| 563 let collection = [1, 2, 3, 4, 5]; |
| 564 let sum = 0; |
| 565 let i = 0; |
| 566 testDone = false; |
| 567 for await (var x of async(collection, kNext, log)) { |
| 568 sum += x; |
| 569 if (++i === 3) break; |
| 570 } |
| 571 testDone = true; |
| 572 return { sum, log }; |
| 573 } |
| 574 |
| 575 test = testBreakStatementReturnMethodNotPresent(); |
| 576 assertFalse(testDone); |
| 577 assertEquals({sum: 6, log: ["[Symbol.asyncIterator]()", |
| 578 ".next() -> resolved 1", |
| 579 ".next() -> resolved 2", |
| 580 ".next() -> resolved 3"]}, |
| 581 await test); |
| 582 assertTrue(testDone); |
| 583 |
| 584 async function testBreakStatementReturnMethodPresent() { |
| 585 let log = []; |
| 586 let collection = [1, 2, 3, 4, 5]; |
| 587 let sum = 0; |
| 588 let i = 0; |
| 589 testDone = false; |
| 590 for await (var x of async(collection, kNext|kReturn, log)) { |
| 591 sum += x; |
| 592 if (++i === 2) break; |
| 593 } |
| 594 testDone = true; |
| 595 return { sum, log }; |
| 596 } |
| 597 |
| 598 test = testBreakStatementReturnMethodPresent(); |
| 599 assertFalse(testDone); |
| 600 assertEquals({sum: 3, log: ["[Symbol.asyncIterator]()", |
| 601 ".next() -> resolved 1", |
| 602 ".next() -> resolved 2", |
| 603 ".return(undefined)"]}, |
| 604 await test); |
| 605 assertTrue(testDone); |
| 606 |
| 607 async function testReturnStatementReturnMethodNotPresent() { |
| 608 let log = []; |
| 609 let collection = [1, 2, 3, 4, 5]; |
| 610 let sum = 0; |
| 611 let i = 0; |
| 612 testDone = false; |
| 613 for await (var x of async(collection, kNext, log)) { |
| 614 sum += x; |
| 615 if (++i === 3) { |
| 616 testDone = true; |
| 617 return { sum, log }; |
| 618 } |
| 619 } |
| 620 } |
| 621 |
| 622 test = testReturnStatementReturnMethodNotPresent(); |
| 623 assertFalse(testDone); |
| 624 assertEquals({sum: 6, log: ["[Symbol.asyncIterator]()", |
| 625 ".next() -> resolved 1", |
| 626 ".next() -> resolved 2", |
| 627 ".next() -> resolved 3"]}, |
| 628 await test); |
| 629 assertTrue(testDone); |
| 630 |
| 631 async function testReturnStatementReturnMethodPresent() { |
| 632 let log = []; |
| 633 let collection = [1, 2, 3, 4, 5]; |
| 634 let sum = 0; |
| 635 let i = 0; |
| 636 testDone = false; |
| 637 for await (var x of async(collection, kNext|kReturn, log)) { |
| 638 sum += x; |
| 639 if (++i === 2) { |
| 640 testDone = true; |
| 641 return { sum, log }; |
| 642 } |
| 643 } |
| 644 } |
| 645 |
| 646 test = testReturnStatementReturnMethodPresent(); |
| 647 assertFalse(testDone); |
| 648 assertEquals({sum: 3, log: ["[Symbol.asyncIterator]()", |
| 649 ".next() -> resolved 1", |
| 650 ".next() -> resolved 2", |
| 651 ".return(undefined)"]}, |
| 652 await test); |
| 653 assertTrue(testDone); |
| 654 |
| 655 async function testThrowStatementReturnMethodNotPresent() { |
| 656 let log = []; |
| 657 let collection = [1, 2, 3, 4, 5]; |
| 658 let sum = 0; |
| 659 let i = 0; |
| 660 testDone = false; |
| 661 for await (var x of async(collection, kNext|kThrow, log)) { |
| 662 sum += x; |
| 663 if (++i === 3) { |
| 664 testDone = true; |
| 665 throw { sum, log, toString() { return "TestError"; } }; |
| 666 } |
| 667 } |
| 668 return { sum, log }; |
| 669 } |
| 670 |
| 671 test = testReturnStatementReturnMethodNotPresent(); |
| 672 assertFalse(testDone); |
| 673 try { |
| 674 assertUnreachable("Awaited Promise should be rejected"); |
| 675 } catch (e) { |
| 676 assertEquals("TestError", e.toString()); |
| 677 assertEquals(6, e.sum); |
| 678 assertEquals(["[Symbol.asyncIterator]()", ".next() -> resolved 1", |
| 679 ".next() -> resolved 2", ".next() -> resolved 3" |
| 680 ], e.log); |
| 681 assertTrue(testDone); |
| 682 } |
| 683 |
| 684 })().then(undefined, function(error) { |
| 685 testFailed = true; |
| 686 testFailure = error; |
| 687 }); |
| 688 |
| 689 %RunMicrotasks(); |
| 690 |
| 691 if (testFailed) { |
| 692 throw testFailure; |
| 693 } |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2637403008:
[async-iteration] add support for for-await-of loops in Async Functions (Closed)
