diff -r 000000000000 -r 6474c204b198 intl/locale/tests/unit/test_bug374040.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/locale/tests/unit/test_bug374040.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,39 @@
+function test_full() {
+    var date = new Date();
+    var scriptableDateServ =
+    Components.classes["@mozilla.org/intl/scriptabledateformat;1"].createInstance(Components.interfaces.nsIScriptableDateFormat);
+
+    var dateStrXpcom = scriptableDateServ.FormatDateTime("",
+    scriptableDateServ.dateFormatLong, scriptableDateServ.timeFormatSeconds,
+    date.getFullYear(), date.getMonth()+1, date.getDate(), date.getHours(),
+    date.getMinutes(), date.getSeconds());
+
+    var dateStrJs = date.toLocaleString();
+
+    do_check_eq(dateStrXpcom, dateStrJs);
+
+}
+
+function test_kTimeFormatSeconds() {
+    var date = new Date();
+    var scriptableDateServ =
+    Components.classes["@mozilla.org/intl/scriptabledateformat;1"].createInstance(Components.interfaces.nsIScriptableDateFormat);
+
+    var dateStrXpcom = scriptableDateServ.FormatDateTime("",
+    scriptableDateServ.dateFormatLong, scriptableDateServ.timeFormatNone,
+    date.getFullYear(), date.getMonth()+1, date.getDate(), date.getHours(),
+    date.getMinutes(), date.getSeconds());
+
+    var dateStrJs = date.toLocaleDateString()
+
+    do_check_eq(dateStrXpcom, dateStrJs);
+
+}
+
+function run_test()
+{
+    // XXX test disabled due to bug 421790
+    return;
+    test_full();
+    test_kTimeFormatSeconds();
+}