The Tor Browser / file revision

 Cu.import("resource://services-sync/notifications.js");

 function run_test() {

   var logStats = initTestLogging("Info");

   var blah = 0;

   function callback(i) {

     blah = i;

   }

   let button = new NotificationButton("label", "accessKey", callback);

   button.callback(5);

   do_check_eq(blah, 5);

   do_check_eq(logStats.errorsLogged, 0);

   function badCallback() {

     throw new Error("oops");

   }

   button = new NotificationButton("label", "accessKey", badCallback);

   try {

     button.callback();

   } catch (e) {

     do_check_eq(e.message, "oops");

   }

   do_check_eq(logStats.errorsLogged, 1);

 }