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Diffstat (limited to 'js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-returns-reject.js')
-rw-r--r-- | js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-returns-reject.js | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-returns-reject.js b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-returns-reject.js new file mode 100644 index 0000000000..65eede2a6b --- /dev/null +++ b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-iterator-not-closed-on-next-returns-reject.js @@ -0,0 +1,51 @@ +// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator')) + +// +// +/*--- +esid: pending +description: Lazy %AsyncIterator.prototype% methods don't close the iterator if `.next` returns a rejected Promise. +info: > + AsyncIterator Helpers proposal 2.1.6 +features: [iterator-helpers] +---*/ + +class TestError extends Error {} +class TestIterator extends AsyncIterator { + next() { + return Promise.reject(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) { + assertEq(err instanceof TestError, true); + } + assertEq(iterator.closed, false); + } +})(); + +if (typeof reportCompare == 'function') + reportCompare(0, 0); |