// |reftest| async // This file was procedurally generated from the following sources: // - src/async-generators/yield-star-sync-next.case // - src/async-generators/default/async-declaration.template /*--- description: execution order for yield* with sync iterator and next() (Async generator Function declaration) esid: prod-AsyncGeneratorDeclaration features: [Symbol.iterator, async-iteration, Symbol.asyncIterator] flags: [generated, async] info: | Async Generator Function Definitions AsyncGeneratorDeclaration: async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody } YieldExpression: yield * AssignmentExpression ... 2. Let value be ? GetValue(exprRef). 3. Let generatorKind be ! GetGeneratorKind(). 4. Let iterator be ? GetIterator(value, generatorKind). 5. Let received be NormalCompletion(undefined). 6. Repeat a. If received.[[Type]] is normal, then i. Let innerResult be ? IteratorNext(iterator, received.[[Value]]). ii. Let innerResult be ? Invoke(iterator, "next", « received.[[Value]] »). iii. If generatorKind is async, then set innerResult to ? Await(innerResult). ... v. Let done be ? IteratorComplete(innerResult). vi. If done is true, then 1. Return ? IteratorValue(innerResult). vii. Let received be GeneratorYield(innerResult). ... GetIterator ( obj [ , hint ] ) ... 3. If hint is async, a. Set method to ? GetMethod(obj, @@asyncIterator). b. If method is undefined, i. Let syncMethod be ? GetMethod(obj, @@iterator). ii. Let syncIterator be ? Call(syncMethod, obj). iii. Return ? CreateAsyncFromSyncIterator(syncIterator). ... %AsyncFromSyncIteratorPrototype%.next ( value ) ... 5. Let nextResult be IteratorNext(syncIterator, value). ... 7. Let nextValue be IteratorValue(nextResult). ... 9. Let nextDone be IteratorComplete(nextResult). ... 12. Perform ! Call(valueWrapperCapability.[[Resolve]], undefined, « nextValue »). ... 14. Set onFulfilled.[[Done]] to nextDone. 15. Perform ! PerformPromiseThen(valueWrapperCapability.[[Promise]], onFulfilled, undefined, promiseCapability). ... Async Iterator Value Unwrap Functions 1. Return ! CreateIterResultObject(value, F.[[Done]]). ---*/ var log = []; var obj = { get [Symbol.iterator]() { log.push({ name: "get [Symbol.iterator]", thisValue: this }); return function() { log.push({ name: "call [Symbol.iterator]", thisValue: this, args: [...arguments] }); var nextCount = 0; return { name: "syncIterator", get next() { log.push({ name: "get next", thisValue: this }); return function() { log.push({ name: "call next", thisValue: this, args: [...arguments] }); nextCount++; if (nextCount == 1) { return { name: "next-result-1", get value() { log.push({ name: "get next value (1)", thisValue: this }); return "next-value-1"; }, get done() { log.push({ name: "get next done (1)", thisValue: this }); return false; } }; } return { name: "next-result-2", get value() { log.push({ name: "get next value (2)", thisValue: this }); return "next-value-2"; }, get done() { log.push({ name: "get next done (2)", thisValue: this }); return true; } }; }; } }; }; }, get [Symbol.asyncIterator]() { log.push({ name: "get [Symbol.asyncIterator]" }); return null; } }; var callCount = 0; async function *gen() { callCount += 1; log.push({ name: "before yield*" }); var v = yield* obj; log.push({ name: "after yield*", value: v }); return "return-value"; } var iter = gen(); assert.sameValue(log.length, 0, "log.length"); iter.next("next-arg-1").then(v => { assert.sameValue(log[0].name, "before yield*"); assert.sameValue(log[1].name, "get [Symbol.asyncIterator]"); assert.sameValue(log[2].name, "get [Symbol.iterator]"); assert.sameValue(log[2].thisValue, obj, "get [Symbol.iterator] thisValue"); assert.sameValue(log[3].name, "call [Symbol.iterator]"); assert.sameValue(log[3].thisValue, obj, "[Symbol.iterator] thisValue"); assert.sameValue(log[3].args.length, 0, "[Symbol.iterator] args.length"); assert.sameValue(log[4].name, "get next"); assert.sameValue(log[4].thisValue.name, "syncIterator", "get next thisValue"); assert.sameValue(log[5].name, "call next"); assert.sameValue(log[5].thisValue.name, "syncIterator", "next thisValue"); assert.sameValue(log[5].args.length, 1, "next args.length"); assert.sameValue(log[5].args[0], undefined, "next args[0]"); assert.sameValue(log[6].name, "get next done (1)"); assert.sameValue(log[6].thisValue.name, "next-result-1", "get next done thisValue"); assert.sameValue(log[7].name, "get next value (1)"); assert.sameValue(log[7].thisValue.name, "next-result-1", "get next value thisValue"); assert.sameValue(v.value, "next-value-1"); assert.sameValue(v.done, false); assert.sameValue(log.length, 8, "log.length"); iter.next("next-arg-2").then(v => { assert.sameValue(log[8].name, "call next"); assert.sameValue(log[8].thisValue.name, "syncIterator", "next thisValue"); assert.sameValue(log[8].args.length, 1, "next args.length"); assert.sameValue(log[8].args[0], "next-arg-2", "next args[0]"); assert.sameValue(log[9].name, "get next done (2)"); assert.sameValue(log[9].thisValue.name, "next-result-2", "get next done thisValue"); assert.sameValue(log[10].name, "get next value (2)"); assert.sameValue(log[10].thisValue.name, "next-result-2", "get next value thisValue"); assert.sameValue(log[11].name, "after yield*"); assert.sameValue(log[11].value, "next-value-2"); assert.sameValue(v.value, "return-value"); assert.sameValue(v.done, true); assert.sameValue(log.length, 12, "log.length"); }).then($DONE, $DONE); }).catch($DONE); assert.sameValue(callCount, 1);