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Diffstat (limited to 'js/src/tests/non262/AsyncIterator/prototype/lazy-methods-return-new-iterator-result.js')
-rw-r--r-- | js/src/tests/non262/AsyncIterator/prototype/lazy-methods-return-new-iterator-result.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-return-new-iterator-result.js b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-return-new-iterator-result.js new file mode 100644 index 0000000000..02cae2740d --- /dev/null +++ b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-return-new-iterator-result.js @@ -0,0 +1,42 @@ +// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator')) + +// +// +/*--- +esid: pending +description: Lazy Iterator Helper methods return new iterator result objects. +info: > + Iterator Helpers proposal 2.1.6 +features: [iterator-helpers] +---*/ + +const iterResult = {done: false, value: 1, testProperty: 'test'}; +class TestIterator extends AsyncIterator { + async next() { + return iterResult; + } +} + +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), +]; + +// Call `return` before stepping the iterator: +for (const method of methods) { + const iter = new TestIterator(); + const iterHelper = method(iter); + iterHelper.next().then(result => { + assertEq(result == iterResult, false); + assertEq(result.testProperty, undefined); + }); +} + +if (typeof reportCompare == 'function') + reportCompare(0, 0); |