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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: Reference is evaluated during assignment
info: |
ArrayAssignmentPattern : [ Elisionopt AssignmentRestElement ]
[...]
4. Let result be the result of performing
IteratorDestructuringAssignmentEvaluation of AssignmentRestElement
with iteratorRecord as the argument.
5. If iteratorRecord.[[Done]] is false, return ? IteratorClose(iterator, result).
AssignmentRestElement[Yield] : ... DestructuringAssignmentTarget
1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an
ArrayLiteral, then
a. Let lref be the result of evaluating DestructuringAssignmentTarget.
b. ReturnIfAbrupt(lref).
[...]
features: [Symbol.iterator]
template: async-generator
esid: sec-runtime-semantics-destructuringassignmentevaluation
---*/
//- setup
let nextCount = 0;
let returnCount = 0;
let iterator = {
next() {
nextCount += 1;
return { done: true };
},
return() {
returnCount += 1;
}
};
let obj = {};
let iterable = {
[Symbol.iterator]() {
return iterator;
}
};
//- elems
[...obj['a' + 'b']]
//- vals
iterable
//- body
assert.sameValue(nextCount, 1);
assert.sameValue(returnCount, 0);
assert(!!obj.ab);
assert.sameValue(obj.ab.length, 0);
//- teardown
iter.next()
.then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
.then($DONE, $DONE);
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