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Diffstat (limited to 'js/src/tests/non262/AsyncIterator/prototype/lazy-methods-pass-through-lastValue.js')
-rw-r--r-- | js/src/tests/non262/AsyncIterator/prototype/lazy-methods-pass-through-lastValue.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-pass-through-lastValue.js b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-pass-through-lastValue.js new file mode 100644 index 0000000000..40da229ca6 --- /dev/null +++ b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-pass-through-lastValue.js @@ -0,0 +1,33 @@ +// |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 method of methods) { + const iterator = new TestAsyncIterator(); + const iteratorHelper = method(iterator); + iteratorHelper.next().then( + _ => iteratorHelper.next('last value').then( + ({done, value}) => { + assertEq(done, false); + // Unwrap the return value from asIndexedPairs. + assertEq(Array.isArray(value) ? value[1] : value, 'last value'); + } + ), + ); +} + +if (typeof reportCompare == 'function') + reportCompare(0, 0); + |