yield-star-next-then-get-abrupt.js (2382B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/async-generators/yield-star-next-then-get-abrupt.case 4 // - src/async-generators/default/async-class-decl-method.template 5 /*--- 6 description: Return abrupt after getting next().then (Async Generator method as a ClassDeclaration element) 7 esid: prod-AsyncGeneratorMethod 8 features: [Symbol.iterator, Symbol.asyncIterator, async-iteration] 9 flags: [generated, async] 10 info: | 11 ClassElement : 12 MethodDefinition 13 14 MethodDefinition : 15 AsyncGeneratorMethod 16 17 Async Generator Function Definitions 18 19 AsyncGeneratorMethod : 20 async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody } 21 22 23 YieldExpression: yield * AssignmentExpression 24 ... 25 6. Repeat 26 a. If received.[[Type]] is normal, then 27 ii. Let innerResult be ? Invoke(iterator, "next", 28 « received.[[Value]] »). 29 iii. If generatorKind is async, then set innerResult to 30 ? Await(innerResult). 31 ... 32 33 Await 34 35 ... 36 2. Let promiseCapability be ! NewPromiseCapability(%Promise%). 37 3. Perform ! Call(promiseCapability.[[Resolve]], undefined, « promise »). 38 ... 39 40 Promise Resolve Functions 41 42 ... 43 8. Let then be Get(resolution, "then"). 44 ... 45 10. Get thenAction be then.[[Value]]. 46 ... 47 12. Perform EnqueueJob("PromiseJobs", PromiseResolveThenableJob, « promise, 48 resolution, thenAction »). 49 ... 50 51 ---*/ 52 var reason = {}; 53 var obj = { 54 get [Symbol.iterator]() { 55 throw new Test262Error('it should not get Symbol.iterator'); 56 }, 57 [Symbol.asyncIterator]() { 58 return { 59 next() { 60 return { 61 get then() { 62 throw reason; 63 } 64 }; 65 } 66 }; 67 } 68 }; 69 70 71 72 var callCount = 0; 73 74 class C { async *gen() { 75 callCount += 1; 76 yield* obj; 77 throw new Test262Error('abrupt completion closes iter'); 78 79 }} 80 81 var gen = C.prototype.gen; 82 83 var iter = gen(); 84 85 iter.next().then(() => { 86 throw new Test262Error('Promise incorrectly fulfilled.'); 87 }, v => { 88 assert.sameValue(v, reason, 'reject reason'); 89 90 iter.next().then(({ done, value }) => { 91 assert.sameValue(done, true, 'the iterator is completed'); 92 assert.sameValue(value, undefined, 'value is undefined'); 93 }).then($DONE, $DONE); 94 }).catch($DONE); 95 96 assert.sameValue(callCount, 1);