The Tor Browser / file revision

 function test() {

   function quitRequestObserver(aSubject, aTopic, aData) {

     ok(aTopic == "quit-application-requested" &&

        aSubject instanceof Components.interfaces.nsISupportsPRBool,

        "Received a quit request we're going to deny");

     aSubject.data = true;

   }

   // ensure that we don't accidentally quit

   Services.obs.addObserver(quitRequestObserver, "quit-application-requested", false);

   ok(!Application.quit(),    "Tried to quit - and didn't succeed");

   ok(!Application.restart(), "Tried to restart - and didn't succeed");

   // clean up

   Services.obs.removeObserver(quitRequestObserver, "quit-application-requested");

 }