Unit testing is an important topic in projects. J2EE has suffered from a lack of testability and, clearly, got overtaken by light open source containers. Java EE 6 is taking that into account and unit testing an EBJ, for example, will be simple and standardised (through a embeddable container API).
As Roberto Chinnici mentioned on his blog, Java EE 6 is scheduled for Q1 2009… but reference implementations are already on there way. So I‘ve decided to write a series of tutorials focusing on testing Java EE 6 components.