yield-star-getiter-sync-get-abrupt.js (2017B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/async-generators/yield-star-getiter-sync-get-abrupt.case 4 // - src/async-generators/default/async-class-decl-static-method.template 5 /*--- 6 description: Abrupt completion while getting [Symbol.iterator] (Static 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 static 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 1. Let exprRef be the result of evaluating AssignmentExpression. 26 2. Let value be ? GetValue(exprRef). 27 3. Let generatorKind be ! GetGeneratorKind(). 28 4. Let iterator be ? GetIterator(value, generatorKind). 29 ... 30 31 GetIterator ( obj [ , hint ] ) 32 33 ... 34 3. If hint is async, 35 a. Set method to ? GetMethod(obj, @@asyncIterator). 36 b. If method is undefined, 37 i. Let syncMethod be ? GetMethod(obj, @@iterator). 38 ... 39 40 GetMethod ( V, P ) 41 42 ... 43 2. Let func be ? GetV(V, P). 44 ... 45 46 ---*/ 47 var reason = {}; 48 var obj = { 49 get [Symbol.iterator]() { 50 throw reason; 51 } 52 }; 53 54 55 56 var callCount = 0; 57 58 class C { static async *gen() { 59 callCount += 1; 60 yield* obj; 61 throw new Test262Error('abrupt completion closes iter'); 62 63 }} 64 65 var gen = C.gen; 66 67 var iter = gen(); 68 69 iter.next().then(() => { 70 throw new Test262Error('Promise incorrectly fulfilled.'); 71 }, v => { 72 assert.sameValue(v, reason, "reject reason"); 73 74 iter.next().then(({ done, value }) => { 75 assert.sameValue(done, true, 'the iterator is completed'); 76 assert.sameValue(value, undefined, 'value is undefined'); 77 }).then($DONE, $DONE); 78 }).catch($DONE); 79 80 assert.sameValue(callCount, 1);