| // Copyright (C) 2018 Valerie Young. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-%asyncfromsynciteratorprototype%.return |
| description: return() will return rejected promise if getter of `return` abrupt completes |
| info: | |
| %AsyncFromSyncIteratorPrototype%.return ( value ) |
| ... |
| 2. Let promiseCapability be ! NewPromiseCapability(%Promise%). |
| ... |
| 5. Let return be GetMethod(syncIterator, "return"). |
| 6. IfAbruptRejectPromise(return, promiseCapability). |
| ... |
| 8. Let returnResult be Call(return, syncIterator, « value »). |
| ... |
| 10. If Type(returnResult) is not Object, |
| a. Perform ! Call(promiseCapability.[[Reject]], undefined, « a TypeError exception »). |
| b. Return promiseCapability.[[Promise]]. |
| ... |
| 22. Return promiseCapability.[[Promise]]. |
| |
| flags: [async] |
| features: [async-iteration] |
| ---*/ |
| |
| var obj = { |
| [Symbol.iterator]() { |
| return { |
| next() { |
| return { value: 1, done: false }; |
| }, |
| return() { |
| return 1; |
| } |
| }; |
| } |
| }; |
| |
| async function* asyncg() { |
| yield* obj; |
| } |
| |
| var iter = asyncg(); |
| |
| iter.next().then(function(result) { |
| |
| iter.return().then( |
| function (result) { |
| throw new Test262Error("Promise should be rejected, got: " + result.value); |
| }, |
| function (err) { |
| let typeerror = err instanceof TypeError; |
| assert(typeerror, "Expect TypeError, got: " + err); |
| |
| iter.next().then(({ done, value }) => { |
| assert.sameValue(done, true, 'the iterator is completed'); |
| assert.sameValue(value, undefined, 'value is undefined'); |
| }).then($DONE, $DONE); |
| } |
| ).catch($DONE); |
| |
| }).catch($DONE); |
| |