diff options
Diffstat (limited to 'js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-then-throws.js')
-rw-r--r-- | js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-then-throws.js | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-then-throws.js b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-then-throws.js new file mode 100644 index 0000000000..609a49c3c7 --- /dev/null +++ b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-then-throws.js @@ -0,0 +1,57 @@ +// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator')) + +// +// +/*--- +esid: pending +description: Lazy %AsyncIterator.prototype% methods don't close the iterator if `then` returned by `next` throws. +info: > + AsyncIterator Helpers proposal 2.1.6 +features: [iterator-helpers] +---*/ + +class TestError extends Error {} + +class TestIterator extends AsyncIterator { + next() { + return { + then() { + throw new TestError(); + } + }; + } + + closed = false; + async return(value) { + this.closed = true; + return {done: true, value}; + } +} + +const methods = [ + ["map", x => x], + ["filter", x => true], + ["take", Infinity], + ["drop", 0], + ["asIndexedPairs", undefined], + ["flatMap", async function*(x) { yield x; }], +]; + +(async () => { + for (const [method, arg] of methods) { + const iterator = new TestIterator(); + assertEq(iterator.closed, false); + + try { + await iterator[method](arg).next(); + assertEq(true, false, 'Expected exception'); + } catch(err) { + console.log(err); + assertEq(err instanceof TestError, true); + } + assertEq(iterator.closed, false); + } +})(); + +if (typeof reportCompare == 'function') + reportCompare(0, 0); |