Since the intruduction of CDI in java a lot has changed. For personally i started to move away from spring applications.
As a result the testing became less obvious, but Arquillian came to the rescue.
For the Dutch Java User group NLJUG I wrote an article that can be used as a basic primer including some common practices towards using Arquillian effectivly.
The article can be found at NLJUG Article database, Arquillian 101 .