JUnitRules

About

JUnitRules is a collection of rules for JUnit. It decreases the amount of boilerplate code written in tests.

At the moment two rules are provided

• EntityManagerRule
• FilePrepareRule

EntityManagerRule

This rule provides a cool solution when you have to setup entity managers during your tests. Ecspecially when you are in the context of pure Java EE (6), you'll write often code like this

EntityManagerFactory emFactory = Persistence.createEntityManagerFactory("YourPU");
EntityManager em = emFactory.createEntityManager();
Transaction trans = em.getTransaction();
trans.begin();

// ... Your code

trans.rollback();
em.close();

With this rule, this is compressed to this:

@Rule
public EntityManagerRule emRule = new EntityManagerRule(this);

@PersistenceContext(unitName = "YourPU")
EntityManager em;

@Test
public void yourTest() {
    // ... your code
}

Important Please notice that you must provide the unitName. Otherwise the rule can't determine what to do.

FilePrepareRule