diff -r 000000000000 -r 6474c204b198 dom/tests/unit/test_bug319968.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/tests/unit/test_bug319968.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+function run_test()
+{
+  var domParser = Components.classes["@mozilla.org/xmlextras/domparser;1"]
+                            .createInstance(Components.interfaces.nsIDOMParser);
+  var aDom = domParser.parseFromString("<root><feed><entry/><entry/></feed></root>",
+                                       "application/xml");
+  var feedList = aDom.getElementsByTagName("feed");
+  do_check_neq(feedList, null);
+  do_check_eq(feedList.length, 1);
+  do_check_neq(feedList[0], null);
+  do_check_eq(feedList[0].tagName, "feed");
+  var entry = feedList[0].getElementsByTagName("entry");
+  do_check_neq(entry, null);
+}