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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/non262/Array/iterator_edge_cases.js | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/js/src/tests/non262/Array/iterator_edge_cases.js b/js/src/tests/non262/Array/iterator_edge_cases.js new file mode 100644 index 0000000000..156aaba5f1 --- /dev/null +++ b/js/src/tests/non262/Array/iterator_edge_cases.js @@ -0,0 +1,50 @@ +// Test that we can't confuse %ArrayIteratorPrototype% for an +// ArrayIterator object. +function TestArrayIteratorPrototypeConfusion() { + var iter = [][Symbol.iterator](); + try { + iter.next.call(Object.getPrototypeOf(iter)) + throw new Error("Call did not throw"); + } catch (e) { + assertEq(e instanceof TypeError, true); + assertEq(e.message, "next method called on incompatible Array Iterator"); + } +} +TestArrayIteratorPrototypeConfusion(); + +// Tests that we can use %ArrayIteratorPrototype%.next on a +// cross-compartment iterator. +function TestArrayIteratorWrappers() { + var iter = [][Symbol.iterator](); + assertDeepEq(iter.next.call(newGlobal().eval('[5][Symbol.iterator]()')), + { value: 5, done: false }) +} +if (typeof newGlobal === "function") { + TestArrayIteratorWrappers(); +} + +// Tests that calling |next| on an array iterator after iteration has finished +// doesn't get the array's |length| property. +function TestIteratorNextGetLength() { + var lengthCalledTimes = 0; + var array = { + __proto__: Array.prototype, + get length() { + lengthCalledTimes += 1; + return { + valueOf() { + return 0; + } + }; + } + }; + var it = array[Symbol.iterator](); + it.next(); + it.next(); + assertEq(1, lengthCalledTimes); +} +TestIteratorNextGetLength(); + + +if (typeof reportCompare === "function") + reportCompare(true, true); |