diff -r 000000000000 -r 6474c204b198 services/common/tests/unit/test_utils_atob.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/services/common/tests/unit/test_utils_atob.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+Cu.import("resource://services-common/utils.js");
+
+function run_test() {
+  let data = ["Zm9vYmE=", "Zm9vYmE==", "Zm9vYmE==="];
+  for (let d in data) {
+    do_check_eq(CommonUtils.safeAtoB(data[d]), "fooba");
+  }
+}