diff -r 000000000000 -r 6474c204b198 testing/xpcshell/example/unit/test_sample.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/xpcshell/example/unit/test_sample.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+/* This is the most basic testcase.  It makes some trivial assertions, 
+ * then sets a timeout, and exits the test harness when that timeout 
+ * fires. This is meant to demonstrate that there is a complete event 
+ * system available to test scripts.
+ * Available functions are described at:
+ * http://developer.mozilla.org/en/docs/Writing_xpcshell-based_unit_tests
+ */
+function run_test() {
+  do_check_eq(57, 57)
+  do_check_neq(1, 2)
+  do_check_true(true);
+
+  do_test_pending();
+  do_timeout(100, do_test_finished);
+}