Revision control
Copy as Markdown
// Copyright (C) 2017 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
desc: Abrupt completion returned from IteratorClose
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).
features: [Symbol.iterator]
template: async-generator
es6id: 12.14.5.2
esid: sec-runtime-semantics-destructuringassignmentevaluation
---*/
//- setup
let nextCount = 0;
let returnCount = 0;
let thrower = function() {
throw new Test262Error();
};
let x;
let iterator = {
next() {
nextCount += 1;
return { done: nextCount > 10 };
},
return() {
returnCount += 1;
throw new Test262Error();
}
};
let iterable = {
[Symbol.iterator]() {
return iterator;
}
};
//- error
Test262Error
//- elems
[ x , ]
//- vals
iterable
//- teardown
iter.next().then(() => $DONE('Promise incorrectly fulfilled.'), ({ constructor }) => {
assert.sameValue(nextCount, 1);
assert.sameValue(returnCount, 1);
assert.sameValue(constructor, Test262Error);
}).then($DONE, $DONE);