diff options
Diffstat (limited to 'js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-closed-on-yield-throws.js')
-rw-r--r-- | js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-closed-on-yield-throws.js | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-closed-on-yield-throws.js b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-closed-on-yield-throws.js new file mode 100644 index 0000000000..bec857eb33 --- /dev/null +++ b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-closed-on-yield-throws.js @@ -0,0 +1,53 @@ +// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator')) + +// +// +/*--- +esid: pending +description: Lazy %AsyncIterator.prototype% methods close the iterator if `yield` throws. +info: > + AsyncIterator Helpers proposal 2.1.6 +features: [iterator-helpers] +---*/ + +class TestError extends Error {} +class TestAsyncIterator extends AsyncIterator { + async next() { + return {done: false, value: 1}; + } + + closed = false; + async return(value) { + this.closed = true; + return {done: true, value}; + } +} + +async function* gen(x) { yield x; } +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(gen), +]; + +for (const method of methods) { + const iterator = new TestAsyncIterator(); + const iteratorHelper = method(iterator); + + assertEq(iterator.closed, false); + iteratorHelper.next().then( + _ => iteratorHelper.throw(new TestError()).then( + _ => assertEq(true, false, 'Expected reject'), + err => { + assertEq(err instanceof TestError, true); + assertEq(iterator.closed, true); + }, + ), + ); +} + +if (typeof reportCompare == 'function') + reportCompare(0, 0); |