How to inject PersistenceContext during unit testing?

Question

This is my java class:

public class Finder {
  @PersistenceContext(unitName = \"abc\")
  EntityManager em;
  public boolean exists(int i) {
    return (this.em.f         


        

Answer 1

Without a container like Spring (or something like Unitils - which is Spring based), you will have to inject the entity manager manually. In that case, you could use something like this as base class:

public abstract class JpaBaseRolledBackTestCase {
    protected static EntityManagerFactory emf;

    protected EntityManager em;

    @BeforeClass
    public static void createEntityManagerFactory() {
        emf = Persistence.createEntityManagerFactory("PetstorePu");
    }

    @AfterClass
    public static void closeEntityManagerFactory() {
        emf.close();
    }

    @Before
    public void beginTransaction() {
        em = emf.createEntityManager();
        em.getTransaction().begin();
    }

    @After
    public void rollbackTransaction() {   
        if (em.getTransaction().isActive()) {
            em.getTransaction().rollback();
        }

        if (em.isOpen()) {
            em.close();
        }
    }
}