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// |reftest| async
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%asyncfromsynciteratorprototype%.return
description: >
If syncIterator's "return" method is `null`,
a Promise resolved with `undefined` value is returned.
info: |
%AsyncFromSyncIteratorPrototype%.return ( value )
[...]
5. Let return be GetMethod(syncIterator, "return").
[...]
7. If return is undefined, then
a. Let iterResult be ! CreateIterResultObject(value, true).
b. Perform ! Call(promiseCapability.[[Resolve]], undefined, « iterResult »).
c. Return promiseCapability.[[Promise]].
GetMethod ( V, P )
[...]
2. Let func be ? GetV(V, P).
3. If func is either undefined or null, return undefined.
flags: [async]
features: [async-iteration]
includes: [asyncHelpers.js]
---*/
var iterationCount = 0;
var returnGets = 0;
var syncIterator = {
[Symbol.iterator]() {
return this;
},
next() {
return {value: 1, done: false};
},
get return() {
returnGets += 1;
return null;
},
};
asyncTest(async function() {
for await (let _ of syncIterator) {
iterationCount += 1;
break;
}
assert.sameValue(iterationCount, 1);
assert.sameValue(returnGets, 1);
});
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