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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-asynciteratorclose
description: >
If retrieving an iterator's `return` method generates an error while
closing the iterator with non-throw completion, the error should be
forwarded to the runtime.
info: |
AsyncIteratorClose ( iteratorRecord, completion )
[...]
4. Let innerResult be GetMethod(iterator, "return").
5. If innerResult.[[Type]] is normal,
[...]
6. If completion.[[Type]] is throw, return Completion(completion).
7. If innerResult.[[Type]] is throw, return Completion(innerResult).
GetMethod ( V, P )
[...]
2. Let func be ? GetV(V, P).
3. If func is either undefined or null, return undefined.
4. If IsCallable(func) is false, throw a TypeError exception.
features: [async-iteration]
flags: [async]
---*/
const asyncIterable = {};
asyncIterable[Symbol.asyncIterator] = function() {
return {
next: function() {
return { done: false, value: null };
},
return: Symbol(),
};
};
let iterationCount = 0;
const promise = (async function() {
for await (const x of asyncIterable) {
iterationCount += 1;
break;
}
})();
promise.then(function(value) {
throw new Test262Error("Promise should be rejected, got: " + value);
}, function(error) {
assert.sameValue(error.constructor, TypeError);
assert.sameValue(iterationCount, 1, "The loop body is evaluated");
}).then($DONE, $DONE);