diff -r 000000000000 -r 6474c204b198 services/common/tests/unit/test_utils_ensureMillisecondsTimestamp.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/services/common/tests/unit/test_utils_ensureMillisecondsTimestamp.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+/* 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() {
+    do_check_null(CommonUtils.ensureMillisecondsTimestamp(null));
+    do_check_null(CommonUtils.ensureMillisecondsTimestamp(0));
+    do_check_null(CommonUtils.ensureMillisecondsTimestamp("0"));
+    do_check_null(CommonUtils.ensureMillisecondsTimestamp("000"));
+
+    do_check_null(CommonUtils.ensureMillisecondsTimestamp(999 * 10000000000));
+
+    do_check_throws(function err() { CommonUtils.ensureMillisecondsTimestamp(-1); });
+    do_check_throws(function err() { CommonUtils.ensureMillisecondsTimestamp(1); });
+    do_check_throws(function err() { CommonUtils.ensureMillisecondsTimestamp(1.5); });
+    do_check_throws(function err() { CommonUtils.ensureMillisecondsTimestamp(999 * 10000000000 + 0.5); });
+
+    do_check_throws(function err() { CommonUtils.ensureMillisecondsTimestamp("-1"); });
+    do_check_throws(function err() { CommonUtils.ensureMillisecondsTimestamp("1"); });
+    do_check_throws(function err() { CommonUtils.ensureMillisecondsTimestamp("1.5"); });
+    do_check_throws(function err() { CommonUtils.ensureMillisecondsTimestamp("" + (999 * 10000000000 + 0.5)); });
+}