NotifyBuilder not working as expected

am trying to test an error handling route. The NotificationBuilder does not work as expected (it always returns false).

Created a main route and a test route to test the main route. I used Spring Boot - all other tests work fine, so there is no problem with the setup I guess.

I have attached the sample project. Please uncomment the @Ignore method to test the method. Please read the README.md attached in the project