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JPA

See JPA + EJB 3 Testing for a more in-depth tada!

@Fixtures("widgets.xml")
public class WidgetDaoTest {

    @Rule
    public HibernatePersistenceContext persistenceContext = new HibernatePersistenceContext();

    @Test
    public void testListAll() {
        WidgetDao widgetDao = new JpaWidgetDao(persistenceContext.getEntityManager());

        List<Widget> widgets = widgetDao.listAll();
        assertFalse(widgets.isEmpty());
    }
}

Database Testing Using DerbyDataSourceRule

public class UserDaoTest {

    @Rule
    public DerbyDataSourceRule derby = new DerbyDataSourceRule();
    
    @Before
    public void setUpDatabase() {
        derby.execute("CREATE TABLE users (id INTEGER NOT NULL"
            + "GENERATED ALWAYS AS IDENTITY, name VARCHAR(20) NOT NULL UNIQUE)");
    }

    @After
    public void tearDownDatabase() {
        derby.execute("DROP TABLE users");
    }

    @Test
    public void testCreate() {
        UserDao userDao = new UserDaoImpl(derby);
        assertEquals(0, derby.count("users"));
        userDao.createNewUser("user1");
        assertEquals(1, derby.count("users"));
    }
}

NOTE that derby.count() and derby.execute() are currently only available in 0.5.1-SNAPSHOT.

Writing Functional Tests for HTTP clients

See Functional HTTP Testing

Get it?

Maven.

<project>

  <dependencies>
    <dependency>
      <groupId>junit-rules</groupId>
      <artifactId>junit-rules</artifactId>
      <version>0.5</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <repositories>
    <repository>
      <id>maven2.github.com</id>
      <url>http://maven2.github.com</url>
    </repository>
  </repositories>

</project>