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 const Cc = Components.classes;

 const Ci = Components.interfaces;

 const Cr = Components.results;

 function test_formatdatetime_return()

 {

   var dateConv = Cc["@mozilla.org/intl/scriptabledateformat;1"].

     getService(Ci.nsIScriptableDateFormat);

   /* Testing if we throw instead of crashing when we are passed 0s. */

   var x = false;

   try {

     dateConv.FormatDate("", Ci.nsIScriptableDateFormat.dateFormatLong,

                         0, 0, 0);

   }

   catch (e if (e.result == Cr.NS_ERROR_INVALID_ARG)) {

     x = true;

   }

   if (!x)

     do_throw("FormatDate didn't throw when passed 0 for its arguments.");

 }

 function run_test()

 {

   test_formatdatetime_return();

 }