async-gen-yield-star-getiter-async-null-sync-get-abrupt.js (2004B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/async-generators/yield-star-getiter-async-null-sync-get-abrupt.case 4 // - src/async-generators/default/async-obj-method.template 5 /*--- 6 description: Abrupt completion while getting @@iterator after null @@asyncIterator (Async generator method) 7 esid: prod-AsyncGeneratorMethod 8 features: [Symbol.iterator, Symbol.asyncIterator, async-iteration] 9 flags: [generated, async] 10 info: | 11 Async Generator Function Definitions 12 13 AsyncGeneratorMethod : 14 async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody } 15 16 17 YieldExpression: yield * AssignmentExpression 18 19 1. Let exprRef be the result of evaluating AssignmentExpression. 20 2. Let value be ? GetValue(exprRef). 21 3. Let generatorKind be ! GetGeneratorKind(). 22 4. Let iterator be ? GetIterator(value, generatorKind). 23 ... 24 25 GetIterator ( obj [ , hint ] ) 26 27 ... 28 3. If hint is async, 29 a. Set method to ? GetMethod(obj, @@asyncIterator). 30 b. If method is undefined, 31 i. Let syncMethod be ? GetMethod(obj, @@iterator). 32 ... 33 34 GetMethod ( V, P ) 35 36 ... 37 2. Let func be ? GetV(V, P). 38 ... 39 40 ---*/ 41 var calls = 0; 42 var reason = {}; 43 var obj = { 44 get [Symbol.iterator]() { 45 throw reason; 46 }, 47 get [Symbol.asyncIterator]() { 48 calls += 1; 49 return null; 50 } 51 }; 52 53 54 var callCount = 0; 55 56 var gen = { 57 async *method() { 58 callCount += 1; 59 yield* obj; 60 throw new Test262Error('abrupt completion closes iter'); 61 62 } 63 }.method; 64 65 var iter = gen(); 66 67 iter.next().then(() => { 68 throw new Test262Error('Promise incorrectly fulfilled.'); 69 }, v => { 70 assert.sameValue(v, reason, 'reject reason'); 71 assert.sameValue(calls, 1); 72 73 iter.next().then(({ done, value }) => { 74 assert.sameValue(done, true, 'the iterator is completed'); 75 assert.sameValue(value, undefined, 'value is undefined'); 76 }).then($DONE, $DONE); 77 }).catch($DONE); 78 79 assert.sameValue(callCount, 1);