diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/collections/iterator-proto-surfaces.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/collections/iterator-proto-surfaces.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+// Iterator prototype surfaces.
+
+load(libdir + "asserts.js");
+load(libdir + "iteration.js");
+
+function test(constructor) {
+    var proto = Object.getPrototypeOf(constructor()[std_iterator]());
+    var names = Object.getOwnPropertyNames(proto);
+    names.sort();
+    assertDeepEq(names, [std_iterator, 'next']);
+
+    var desc = Object.getOwnPropertyDescriptor(proto, 'next');
+    assertEq(desc.configurable, true);
+    assertEq(desc.enumerable, false);
+    assertEq(desc.writable, true);
+
+    assertEq(proto[std_iterator](), proto);
+    assertIteratorDone(proto, undefined);
+}
+
+//test(Array);
+test(Map);
+test(Set);