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);