yield-star-next-then-get-abrupt.js (2259B)
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-expression.template 5 /*--- 6 description: Return abrupt after getting next().then (Unnamed async generator expression) 7 esid: prod-AsyncGeneratorExpression 8 features: [Symbol.iterator, Symbol.asyncIterator, async-iteration] 9 flags: [generated, async] 10 info: | 11 Async Generator Function Definitions 12 13 AsyncGeneratorExpression : 14 async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) { 15 AsyncGeneratorBody } 16 17 18 YieldExpression: yield * AssignmentExpression 19 ... 20 6. Repeat 21 a. If received.[[Type]] is normal, then 22 ii. Let innerResult be ? Invoke(iterator, "next", 23 « received.[[Value]] »). 24 iii. If generatorKind is async, then set innerResult to 25 ? Await(innerResult). 26 ... 27 28 Await 29 30 ... 31 2. Let promiseCapability be ! NewPromiseCapability(%Promise%). 32 3. Perform ! Call(promiseCapability.[[Resolve]], undefined, « promise »). 33 ... 34 35 Promise Resolve Functions 36 37 ... 38 8. Let then be Get(resolution, "then"). 39 ... 40 10. Get thenAction be then.[[Value]]. 41 ... 42 12. Perform EnqueueJob("PromiseJobs", PromiseResolveThenableJob, « promise, 43 resolution, thenAction »). 44 ... 45 46 ---*/ 47 var reason = {}; 48 var obj = { 49 get [Symbol.iterator]() { 50 throw new Test262Error('it should not get Symbol.iterator'); 51 }, 52 [Symbol.asyncIterator]() { 53 return { 54 next() { 55 return { 56 get then() { 57 throw reason; 58 } 59 }; 60 } 61 }; 62 } 63 }; 64 65 66 67 var callCount = 0; 68 69 var gen = async function *() { 70 callCount += 1; 71 yield* obj; 72 throw new Test262Error('abrupt completion closes iter'); 73 74 }; 75 76 var iter = gen(); 77 78 iter.next().then(() => { 79 throw new Test262Error('Promise incorrectly fulfilled.'); 80 }, v => { 81 assert.sameValue(v, reason, 'reject reason'); 82 83 iter.next().then(({ done, value }) => { 84 assert.sameValue(done, true, 'the iterator is completed'); 85 assert.sameValue(value, undefined, 'value is undefined'); 86 }).then($DONE, $DONE); 87 }).catch($DONE); 88 89 assert.sameValue(callCount, 1);