A modern programming language that makes developers happier.

kotlinlang

I've been moving away from unit testing w. JavaFX myself.  I found that the tests end up being a drag on maintenance and didn't add too much by way of catching bugs.  I still have them for utilities and logic that has a POJO feel.  One customer I work with uses a test automation tool instead that manipulates the screen as though a human were dragging a mouse around.

I still use unit tests a lot for RESTful web services, JMS, and EJBs.