diff options
Diffstat (limited to 'js/src/tests/non262/Iterator/prototype/map/values-pass-through-chained-maps-to-next.js')
-rw-r--r-- | js/src/tests/non262/Iterator/prototype/map/values-pass-through-chained-maps-to-next.js | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/map/values-pass-through-chained-maps-to-next.js b/js/src/tests/non262/Iterator/prototype/map/values-pass-through-chained-maps-to-next.js new file mode 100644 index 0000000000..1873017981 --- /dev/null +++ b/js/src/tests/non262/Iterator/prototype/map/values-pass-through-chained-maps-to-next.js @@ -0,0 +1,36 @@ +// |reftest| skip-if(!this.hasOwnProperty('Iterator')) +// + +/*--- +esid: pending +description: Multiple chained %Iterator.prototype%.map calls pass `lastValue` to the iterator's `next` call. +info: > + Iterator Helpers Proposal 2.1.5.2 +features: [iterator-helpers] +---*/ + +const iteratorWhereNextTakesValue = Object.setPrototypeOf({ + next: function(value) { + assertEq(arguments.length, 0); + + if (this.value < 3) + return { done: false, value: this.value++ }; + return { done: true, value: undefined }; + }, + value: 0, +}, Iterator.prototype); + +const mappedIterator = iteratorWhereNextTakesValue.map(x => 2 * x).map(x => 1 + x); + +assertEq(mappedIterator.next(1).value, 1); + +assertEq(mappedIterator.next(2).value, 3); + +assertEq(mappedIterator.next(3).value, 5); + +assertEq(mappedIterator.next(4).done, true); + +assertEq(mappedIterator.next(5).done, true); + +if (typeof reportCompare == 'function') + reportCompare(0, 0); |