diff options
Diffstat (limited to 'js/src/tests/non262/Iterator/prototype/lazy-methods-pass-value-through-chain.js')
-rw-r--r-- | js/src/tests/non262/Iterator/prototype/lazy-methods-pass-value-through-chain.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/lazy-methods-pass-value-through-chain.js b/js/src/tests/non262/Iterator/prototype/lazy-methods-pass-value-through-chain.js new file mode 100644 index 0000000000..553e6934f7 --- /dev/null +++ b/js/src/tests/non262/Iterator/prototype/lazy-methods-pass-value-through-chain.js @@ -0,0 +1,33 @@ +// |reftest| skip-if(!this.hasOwnProperty('Iterator')) + +class TestIterator extends Iterator { + 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 TestIterator(); + const iteratorChain = outerMethod(innerMethod(iterator)); + iteratorChain.next(); + let result = iteratorChain.next('last value'); + assertEq(result.done, false); + // Unwrap the asIndexedPair return values. + while (Array.isArray(result.value)) { + result.value = result.value[1]; + } + assertEq(result.value, 'last value'); + } +} + +if (typeof reportCompare == 'function') + reportCompare(0, 0); |