mirror of https://github.com/tc39/test262.git
73 lines
1.8 KiB
Plaintext
73 lines
1.8 KiB
Plaintext
// Copyright (C) 2017 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: IteratorClose invoked when elision does not exhaust the 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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5. If Elision is present, then
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a. Let status be the result of performing
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IteratorDestructuringAssignmentEvaluation of Elision with
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iteratorRecord as the argument.
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b. If status is an abrupt completion, then
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[...]
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7. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
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status).
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7.4.6 IteratorClose ( iterator, completion )
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[...]
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5. Let innerResult be Call(return, iterator, « »).
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[...]
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features: [Symbol.iterator]
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template: async-generator
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esid: sec-runtime-semantics-destructuringassignmentevaluation
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---*/
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//- setup
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let nextCount = 0;
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let returnCount = 0;
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let thisValue = null;
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let args = null;
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let x;
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let iterator = {
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next() {
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nextCount += 1;
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// Set an upper-bound to limit unnecessary iteration in non-conformant
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// implementations
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return { done: nextCount > 10 };
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},
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return() {
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returnCount += 1;
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thisValue = this;
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args = arguments;
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return {};
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}
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};
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let iterable = {
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[Symbol.iterator]() {
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return iterator;
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}
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};
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//- elems
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[ x , , ]
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//- vals
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iterable
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//- body
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assert.sameValue(nextCount, 2);
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assert.sameValue(returnCount, 1);
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assert.sameValue(thisValue, iterator, 'correct `this` value');
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assert(!!args, 'arguments object provided');
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assert.sameValue(args.length, 0, 'zero arguments specified');
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//- teardown
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iter.next()
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.then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
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.then($DONE, $DONE);
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