java - Java EE (JPA) 中的 Junit 测试

Question

我正在使用(EJB、JPA 和 JPQL)在 JAVA EE 中创建一个简单的 Web 应用程序。我想知道如何使用 mockito 测试模型来测试 EJB。我想模拟上下文(数据库和属性)

我该怎么做？

@Mock
private EntityManager mockedEntityManager;
private static TendererBean tendererBean;
private static TendererManagerBean tendererManagerBean;   
private static EJBContainer container;
final Properties p = new Properties();
    p.put("jdbc/Mydatabase", "new://Resource?type=DataSource");
    p.put("jdbc/Mydatabase.JdbcDriver", "apache_derby_net");
    p.put("jdbc/Mydatabase.JdbcUrl", "jdbc:derby://localhost:1527/Mydatabase");
    container = EJBContainer.createEJBContainer(p);
    final Context context = container.getContext();
    tendererBean = (TendererBean) context.lookup("java:global/classesTendererManagerBean");

Answer 1

Alex is right, you should not need database connections in a unit test (unless you trying to create an integration test) You can try mocking them like this. The code may be messy, hope it helps

public class ChargeServiceTest {

@InjectMocks
private ChargeService chargeService;

@Mock
private EntityManager entityManager;

@Mock
private Query query;
@Mock
private Biller biller;
@Mock
private Client client;

private String expectedSqlQuery1 = "Select count(c) from ClientContractCharge c where c.clientContract.biller =?1 and c.recurringInvoice = true and c.clientContract.client = ?2 and (c.dateCreated >= ?3 or c.dateLastUpdated >= ?3)  order by c.dateCreated ASC";

@Before
public void before() {
    chargeService = new ChargeService();
    MockitoAnnotations.initMocks(this);
}

@Test
public void listCountTest1() {
    when(entityManager.createQuery(expectedSqlQuery1)).thenReturn(query);
    when(query.getSingleResult()).thenReturn((long) 10);
    Long count = chargeService.listCount(biller, client);
    verify(query).setParameter(1, biller);
    assertEquals(count, Long.valueOf(10));
}
}

服务等级

@Stateless
@LocalBean public class ChargeService {
public long listCount(Biller biller, Client client) {

    StringBuilder s = new StringBuilder();
    s.append("Select count(c) from ClientContractCharge c where c.clientContract.biller =?1 and c.recurringInvoice = true ");
    if (client != null) {
        s.append("and c.clientContract.client = ?2 ");
    }
    s.append(" order by c.dateCreated ASC");
    Query q = em.createQuery(s.toString());
    q.setParameter(1, biller);
    if (client != null) {
        q.setParameter(2, client);
    }

    return (long) (Long) q.getSingleResult();
}