Testing an EJB with JUnit

Question

How should I test an EJB 3.1 which gets an instance of EntityManager injected?

A possible EJB:

@Stateless
@LocalBean
public class CommentService {

          


        

Answer 1

It's possible to write unit tests that run against a container, but the caveat is that the container/appserver has to be up. Since that's not really practical, the general approach is to use a "mock" container to run your unit tests against. For that, check out JUnitEE or ejb3unit:

junitee

ejb3unit