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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 call default sync throw
info: |
%AsyncFromSyncIteratorPrototype%.throw ( value )
...
2. Let promiseCapability be ! NewPromiseCapability(%Promise%).
...
5. Let throw be GetMethod(syncIterator, "throw").
...
8. Let throwResult be Call(throw, syncIterator, « value »)
9. IfAbruptRejectPromise(throwResult, promiseCapability).
...
22. Return promiseCapability.[[Promise]].
Generator.prototype.throw ( exception )
1. Let g be the this value.
2. Let C be Completion{[[Type]]: throw, [[Value]]: exception, [[Target]]: empty}.
3. Return ? GeneratorResumeAbrupt(g, C).
flags: [async]
features: [async-iteration]
---*/
var thrownError = new Error("Catch me.")
function* g() {
yield 42;
throw new Test262Error('throw closes iter');
yield 43;
}
async function* asyncg() {
yield* g();
}
var iter = asyncg();
iter.next().then(function(result) {
// throw will call sync generator prototype built-in function throw
iter.throw(thrownError).then(
function(result) {
throw new Test262Error('throw should cause rejection of promise');
},
function(err) {
assert.sameValue(err, thrownError, "promise should be reject with custom error, 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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