diff -r 000000000000 -r 6474c204b198 services/common/tests/unit/test_utils_encodeBase64URL.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/services/common/tests/unit/test_utils_encodeBase64URL.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* 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() {
+  run_next_test();
+}
+
+add_test(function test_simple() {
+  let expected = {
+    hello: "aGVsbG8=",
+    "<>?": "PD4_",
+  };
+
+  for (let [k, v] in Iterator(expected)) {
+    do_check_eq(CommonUtils.encodeBase64URL(k), v);
+  }
+
+  run_next_test();
+});
+
+add_test(function test_no_padding() {
+  do_check_eq(CommonUtils.encodeBase64URL("hello", false), "aGVsbG8");
+
+  run_next_test();
+});