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// 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(thow, promiseCapability).
...
8. Let throwResult be Call(throw, syncIterator, « value »).
...
10. If Type(throwResult) is not Object,
a. Perform ! Call(promiseCapability.[[Reject]], undefined, « a TypeError exception »).
b. Return promiseCapability.[[Promise]].
flags: [async]
features: [async-iteration]
---*/
var thrownError = new Error("Don't catch me.")
var obj = {
[Symbol.iterator]() {
return {
next() {
return { value: 1, done: false };
},
throw() {
return 1;
}
};
}
};
async function* asyncg() {
yield* obj;
}
var iter = asyncg();
iter.next().then(function(result) {
iter.throw(thrownError).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);
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