| // Copyright (C) 2018 Valerie Young. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-%asyncfromsynciteratorprototype%.throw |
| description: throw() will return rejected promise if getter of `throw` abrupt completes |
| info: | |
| %AsyncFromSyncIteratorPrototype%.throw ( value ) |
| ... |
| 2. Let promiseCapability be ! NewPromiseCapability(%Promise%). |
| ... |
| 5. Let throw be GetMethod(syncIterator, "throw"). |
| 6. IfAbruptRejectPromise(throw, promiseCapability). |
| ... |
| 8. Let throwResult be Call(throw, syncIterator, « value »). |
| 9. IfAbruptRejectPromise(throwResult, promiseCapability). |
| ... |
| 22. Return promiseCapability.[[Promise]]. |
| |
| flags: [async] |
| features: [async-iteration] |
| ---*/ |
| |
| var thrownError = new Error("Catch me."); |
| |
| var obj = { |
| [Symbol.iterator]() { |
| return { |
| next() { |
| return { value: 1, done: false }; |
| }, |
| throw() { |
| throw thrownError; |
| } |
| }; |
| } |
| }; |
| |
| async function* asyncg() { |
| yield* obj; |
| } |
| |
| var iter = asyncg(); |
| |
| iter.next().then(function(result) { |
| |
| iter.throw().then( |
| function (result) { |
| throw new Test262Error("Promise should be rejected, got: " + result.value); |
| }, |
| function (err) { |
| assert.sameValue(err, thrownError, "Promise should be rejected with thrown error"); |
| |
| 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); |