diff -r 000000000000 -r 6474c204b198 netwerk/test/unit/test_bug935499.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/test/unit/test_bug935499.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+function run_test() {
+  var idnService = Cc["@mozilla.org/network/idn-service;1"]
+                   .getService(Ci.nsIIDNService);
+
+  var isASCII = {};
+  do_check_eq(idnService.convertToDisplayIDN("xn--", isASCII), "xn--");
+}