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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/non262/AsyncIterator/prototype/lazy-methods-pass-value-through-chain.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-pass-value-through-chain.js b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-pass-value-through-chain.js new file mode 100644 index 0000000000..8b5506ee97 --- /dev/null +++ b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-pass-value-through-chain.js @@ -0,0 +1,38 @@ +// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator')) + +class TestAsyncIterator extends AsyncIterator { + async next(value) { + return {done: false, value}; + } +} + +const methods = [ + iter => iter.map(x => x), + iter => iter.filter(x => true), + iter => iter.take(2), + iter => iter.drop(0), + iter => iter.asIndexedPairs(), +]; + +for (const outerMethod of methods) { + for (const innerMethod of methods) { + const iterator = new TestAsyncIterator(); + const iteratorChain = outerMethod(innerMethod(iterator)); + iteratorChain.next().then( + _ => iteratorChain.next('last value').then( + ({done, value}) => { + assertEq(done, false); + // Unwrap the asIndexedPair return values. + while (Array.isArray(value)) { + value = value[1]; + } + assertEq(value, 'last value'); + } + ), + ); + } +} + +if (typeof reportCompare == 'function') + reportCompare(0, 0); + |