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Diffstat (limited to 'js/src/tests/test262/language/statements/for-of/iterator-close-via-return.js')
-rw-r--r-- | js/src/tests/test262/language/statements/for-of/iterator-close-via-return.js | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/iterator-close-via-return.js b/js/src/tests/test262/language/statements/for-of/iterator-close-via-return.js new file mode 100644 index 0000000000..b82fbfa4a9 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-of/iterator-close-via-return.js @@ -0,0 +1,50 @@ +// Copyright (C) 2015 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +es6id: 13.6.4.13 +description: > + Iterators should be closed via their `return` method when iteration is + interrupted via a `return` statement. +features: [Symbol.iterator] +---*/ + +var startedCount = 0; +var returnCount = 0; +var iterationCount = 0; +var iterable = {}; + +iterable[Symbol.iterator] = function() { + return { + next: function() { + startedCount += 1; + return { done: false, value: null }; + }, + return: function() { + returnCount += 1; + return {}; + } + }; +}; + +(function() { + for (var x of iterable) { + assert.sameValue( + startedCount, 1, 'Value is retrieved' + ); + assert.sameValue( + returnCount, 0, 'Iterator is not closed' + ); + iterationCount += 1; + return; + } +}()); + +assert.sameValue( + startedCount, 1, 'Iterator does not restart following interruption' +); +assert.sameValue(iterationCount, 1, 'A single iteration occurs'); +assert.sameValue( + returnCount, 1, 'Iterator is closed after `return` statement' +); + +reportCompare(0, 0); |