Adam Bien's Weblog
Useful NetBeans Shortcuts--Go to JUnit Test
Use Shift+Cmd+T (or Alt+Cmd+T for current daily builds) to switch between the production class and the related unit test.
If it doesn't work, you probably forgot to write a test (it happens sometimes :-))
Summer Workshops: From Java EE 7 Bootstrap and Effective Java EE 7 to Java EE 7 Architectures