JavaFX, Junit, Netbeans problem

Hi,
After setting up everything for running tests using JUnit I stumbled upon an issue.
The app that I was going to test runs fine but the tests (JUnit part) don't. I get this error: "java.lang.NoClassDefFoundError: javafx/scene/Group"
Does anyone know what's wrong?
Thanks in advance,

I'm curious how you will use junit to test a JavaFX app.
How will the junit test work and what will it do?
Will it launch the JavaFX app?
Will it trigger events on the app?
What will it evaluate when comparing expecteds to actuals?
I don't use NetBeans that much, but I downloaded 7.3 beta 2 + a jdk8 pre-release build and installed them both. I created a new JavaFX project in NetBeans, then right-clicked on the generated HelloWorld class and selected Tools | Create Tests. NetBeans went and downloaded junit and a junit plugin for NetBeans, then it generated a Test harness for the public methods. It set each generated test harness method to deliberately fail because they were just dummy methods. I changed the fail statements in the test harnesses to assertTrue(true), then I right clicked again on the original HelloWorld class and selected Test. The junit tests ran. The one which executed the main method passed. The one which executed the start method failed because the app wasn't on the JavaFX application thread. There weren't any compilation errors or missing classes - so I guess that something was clever enough to get jfxrt.jar on the classpath without me needing to do anything.

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