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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/non262/Iterator/prototype/lazy-methods-iterator-closed-on-yield-throws.js | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/lazy-methods-iterator-closed-on-yield-throws.js b/js/src/tests/non262/Iterator/prototype/lazy-methods-iterator-closed-on-yield-throws.js new file mode 100644 index 0000000000..361b800404 --- /dev/null +++ b/js/src/tests/non262/Iterator/prototype/lazy-methods-iterator-closed-on-yield-throws.js @@ -0,0 +1,45 @@ +// |reftest| skip-if(!this.hasOwnProperty('Iterator')) + +// +// +/*--- +esid: pending +description: Lazy %Iterator.prototype% methods close the iterator if `yield` throws. +info: > + Iterator Helpers proposal 2.1.5 +features: [iterator-helpers] +---*/ + +class TestError extends Error {} +class TestIterator extends Iterator { + next() { + return {done: false, value: 1}; + } + + closed = false; + return() { + this.closed = true; + return {done: true}; + } +} + +const methods = [ + iter => iter.map(x => x), + iter => iter.filter(x => true), + iter => iter.take(1), + iter => iter.drop(0), + iter => iter.asIndexedPairs(), + iter => iter.flatMap(x => [x]), +]; + +for (const method of methods) { + const iterator = new TestIterator(); + assertEq(iterator.closed, false); + const iteratorHelper = method(iterator); + iteratorHelper.next(); + assertThrowsInstanceOf(() => iteratorHelper.throw(new TestError()), TestError); + assertEq(iterator.closed, true); +} + +if (typeof reportCompare == 'function') + reportCompare(0, 0); |