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// |reftest| async
// 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 sync `throw` undefined
info: |
%AsyncFromSyncIteratorPrototype%.throw ( value )
...
2. Let promiseCapability be ! NewPromiseCapability(%Promise%).
...
6. Let throw be GetMethod(syncIterator, "throw").
[...]
8. If throw is undefined, then
...
g. Perform ! Call(promiseCapability.[[Reject]], undefined, « a newly created TypeError object »).
h. Return promiseCapability.[[Promise]].
flags: [async]
features: [async-iteration]
includes: [asyncHelpers.js]
---*/
var obj = {
[Symbol.iterator]() {
return {
next() {
return { value: 1, done: false };
}
};
}
};
async function* asyncg() {
yield* obj;
}
var iter = asyncg();
asyncTest(async function () {
await assert.throwsAsync(TypeError, async () => {
await iter.next();
return iter.throw();
}, "Promise should be rejected");
const result = await iter.next();
assert(result.done, "the iterator is completed");
assert.sameValue(result.value, undefined, "value is undefined");
})
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