diff options
Diffstat (limited to 'js/src/tests/non262/Iterator/prototype/lazy-methods-throw-closes-iterator-before-next.js')
-rw-r--r-- | js/src/tests/non262/Iterator/prototype/lazy-methods-throw-closes-iterator-before-next.js | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/lazy-methods-throw-closes-iterator-before-next.js b/js/src/tests/non262/Iterator/prototype/lazy-methods-throw-closes-iterator-before-next.js new file mode 100644 index 0000000000..d3197fc107 --- /dev/null +++ b/js/src/tests/non262/Iterator/prototype/lazy-methods-throw-closes-iterator-before-next.js @@ -0,0 +1,50 @@ +// |reftest| skip-if(!this.hasOwnProperty('Iterator')) + +// +// +/*--- +esid: pending +description: Calling `.throw()` on a lazy %Iterator.prototype% method closes the source iterator. +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(value) { + this.closed = true; + return {done: true, value}; + } +} + +const methods = [ + iter => iter.map(x => x), + iter => iter.filter(x => x), + iter => iter.take(1), + iter => iter.drop(0), + iter => iter.asIndexedPairs(), + iter => iter.flatMap(x => [x]), +]; + +for (const method of methods) { + const iter = new TestIterator(); + const iterHelper = method(iter); + + assertEq(iter.closed, false); + assertThrowsInstanceOf(() => iterHelper.throw(new TestError()), TestError); + assertEq(iter.closed, true); + + const result = iterHelper.next(); + assertEq(result.done, true); + assertEq(result.value, undefined); +} + +if (typeof reportCompare == 'function') + reportCompare(0, 0); |