1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/iterator-proto-1.js b/js/src/jit-test/tests/collections/iterator-proto-1.js
new file mode 100644
index 0000000000..c9827a5746
--- /dev/null
+++ b/js/src/jit-test/tests/collections/iterator-proto-1.js
@@ -0,0 +1,18 @@
+// All iterators of the same collection type share their immediate prototype.
+// Those prototype objects in turn inherit directly from %IteratorPrototype%.
+
+load(libdir + "iteration.js");
+
+// Get %IteratorPrototype%.
+var iterProto = Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]()));
+
+function test(obj0, obj1) {
+    var iter0 = obj0[Symbol.iterator](), iter1 = obj1[Symbol.iterator]();
+    var proto = Object.getPrototypeOf(iter0);
+    assertEq(Object.getPrototypeOf(iter1), proto);
+    assertEq(Object.getPrototypeOf(proto), iterProto);
+}
+
+test([], [1]);
+test(new Map(), new Map([[1, 1]]));
+test(new Set(), new Set([1]));