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50 lines
1.3 KiB
Plaintext
50 lines
1.3 KiB
Plaintext
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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desc: >
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IteratorClose is not called when rest element evaluation has exhausted the
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iterator
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info: |
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ArrayAssignmentPattern :
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[ AssignmentElementList , Elisionopt AssignmentRestElementopt ]
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[...]
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7. If AssignmentRestElement is present, then
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a. Let status be the result of performing
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IteratorDestructuringAssignmentEvaluation of AssignmentRestElement
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with iteratorRecord as the argument.
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8. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
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status).
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9. Return Completion(status).
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features: [Symbol.iterator]
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template: default
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esid: sec-runtime-semantics-destructuringassignmentevaluation
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---*/
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//- setup
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var nextCount = 0;
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var returnCount = 0;
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var iterable = {};
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var x, y;
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var iterator = {
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next: function() {
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nextCount += 1;
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return { value: nextCount, done: nextCount > 1 };
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},
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return: function() {
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returnCount += 1;
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}
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};
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iterable[Symbol.iterator] = function() {
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return iterator;
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};
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//- elems
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[ x , ...y ]
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//- vals
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iterable
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//- teardown
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assert.sameValue(nextCount, 2, 'nextCount');
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assert.sameValue(returnCount, 0, 'returnCount');
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assert.sameValue(x, 1, 'x');
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assert.sameValue(y.length, 0, 'y.length');
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