Everything started when Eve said ‘No‘ when God told her not to eat the fruit. Then my daughter said ‘No‘ when I told her to clean her room. Then we had a bunch of guys saying ‘No‘ to SQL. Then I read Is there such a thing as the NoMock movement?… And today I’m saying … Read more
It’s 2012 and my first resolution of the year is to finally tell the truth about testing : unit testing is pretty much useless when your code runs inside a container. How do you unit test an EJB which relies on the container services (i.e transaction, injection, security…) ? Well, you mock the database access, you mock your security layer, you mock your dependencies, you mock your validation layer… to test what ? A bit of business logic. Yes. Unit test is interesting when you have complex business logic to test so you can have quick feedback. Otherwise, it’s a waste of time which doesn’t test your container services. So I’m not saying unit testing is completely useless, I’m saying that integration testing is also to be considered when you run your code inside a Java EE container.