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// Copyright (C) 2017 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: >
IteratorClose is invoked when evaluation of AssignmentElementList returns
a "return" completion and the iterator has not been marked as "done"
info: |
ArrayAssignmentPattern :
[ AssignmentElementList , Elisionopt AssignmentRestElementopt ]
[...]
2. Let iteratorRecord be Record {[[Iterator]]: iterator, [[Done]]: false}.
3. Let status be the result of performing
IteratorDestructuringAssignmentEvaluation of AssignmentElementList using
iteratorRecord as the argument.
4. If status is an abrupt completion, then
a. If iteratorRecord.[[Done]] is false, return ? IteratorClose(iterator, status).
b. Return Completion(status).
7.4.6 IteratorClose( iterator, completion )
[...]
5. Let innerResult be Call(return, iterator, « »).
6. If completion.[[type]] is throw, return Completion(completion).
7. If innerResult.[[type]] is throw, return Completion(innerResult).
features: [Symbol.iterator, generators]
template: async-generator
es6id: 12.14.5.2
esid: sec-runtime-semantics-destructuringassignmentevaluation
---*/
//- setup
let returnCount = 0;
let unreachable = 0;
let iterator = {
return() {
returnCount += 1;
throw new Test262Error();
}
};
let iterable = {
[Symbol.iterator]() {
return iterator;
}
};
//- elems
[ {}[yield] , ]
//- vals
iterable
//- body
unreachable += 1;
//- teardown
iter.return().then(() => $DONE('Promise incorrectly fulfilled.'), ({ constructor }) => {
assert.sameValue(returnCount, 1);
assert.sameValue(unreachable, 0, 'Unreachable statement was not executed');
assert.sameValue(constructor, Test262Error);
}).then($DONE, $DONE);
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