hibernate - 如何在 Tapestry 相关项目中测试 DAO 层

Question

我有一个 Tapestry5 + Hibernate 应用程序，我正在尝试为其编写单元测试。我正在寻找一些指导或最佳实践来测试此类项目中的 DAO 层。我使用 testng 尝试了下面的测试用例，但没有成功。

@Test
public void createOrderTest() {
    IOCUtilities.buildDefaultRegistry();
    OrderManager orderManager = new OrderManager();
    Order o1 = new Order();
    Date date = new Date(System.currentTimeMillis());
    o1.setOrderDate(date);
    o1.setOrderStatus(OrderStatus.BILLED.toString());
    orderManager.createOrder(o1);
}

当我尝试运行测试用例时收到错误消息。

java.lang.IllegalArgumentException: Contribution org.apache.tapestry5.yuicompressor.services.YuiCompressorModule.contributeMinimizers(MappedConfiguration) (at YuiCompressorModule.java:42) is for service 'interface org.apache.tapestry5.services.assets.ResourceMinimizer' qualified with marker annotations [interface org.apache.tapestry5.ioc.annotations.Primary], which does not exist.
at org.apache.tapestry5.ioc.internal.RegistryImpl.validateContributeDefs(RegistryImpl.java:246)
at org.apache.tapestry5.ioc.internal.RegistryImpl.<init>(RegistryImpl.java:205)
at org.apache.tapestry5.ioc.RegistryBuilder.build(RegistryBuilder.java:177)
at org.apache.tapestry5.ioc.IOCUtilities.buildDefaultRegistry(IOCUtilities.java:51)
at com.vc.xpressor.testng.OrderManagerTest.createOrderTest(OrderManagerTest.java:21)

Answer 1

如果您在 DAO 中使用构造函数注入(inject)，则在 DAO 测试中根本不需要 Tapestry。我是否正确，您的 DAO 所需的唯一依赖项是 hibernate session ，也许还有几个@Symbols？

如果是这样，您所需要做的就是设置与内存数据库(例如 h2)的连接并将其包装在 hibernate session 中。然后将 hibernate session 传递给 DAO 构造函数。

我为我的 DAO 使用一个基本测试类，它在 @Before 方法中设置连接和 session

这是一个示例 DAO

public class ItemDAOImpl implements ItemDAO {
    private final Session session;

    public ItemDAOImpl(Session session) {
        this.session = session;
    }

    public List<Item> findAll() {
        return session.createCriteria(Item.class).list();
    }

    ....
}

在 Tapestry 中，这是在 AppModule 中声明的

public static void bind(ServiceBinder binder) {
    binder.bind(ItemDAO.class, ItemDAOImpl.class);
}

但在我的测试用例中，我不需要 Tapestry

public class ItemDAOImplTest extends AbstractHibernateTest {
    private ItemDAO itemDAO;

    @Override
    protected void before() {
        itemDAO = new ItemDAOImpl(session);
    }

    @Override
    protected void after() {}

    @Test
    public void testFindAll() {
        session.save(new Item(...));
        session.save(new Item(...));
        session.save(new Item(...));
        assertEquals(3, itemDAO.findAll().size());
    }
}

public abstract class AbstractHibernateTest {
    protected SessionFactory sessionFactory;
    protected Session session;

    @Before
    public void abstractBefore() throws Exception {
        Configuration config = new Configuration();

        // see PackageNameHibernateConfigurer source code to dynamically add all
        // classes in the entities package
        config.addAnnotatedClass(Item.class);
        config.addAnnotatedClass(...);

        config.setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect");
        config.setProperty("hibernate.connection.driver_class", "org.h2.Driver");
        config.setProperty("hibernate.connection.url", "jdbc:h2:mem:test");
        config.setProperty("hibernate.hbm2ddl.auto", "create");
        config.setProperty("hibernate.show_sql", "true");
        config.setProperty("hibernate.format_sql", "true");

        sessionFactory = config.buildSessionFactory();
        session = sessionFactory.openSession();
        session.beginTransaction();
        before();
    }

    protected abstract void before() throws Exception;

    @After
    public void abstractAfter() throws Exception {
        Exception exception = null;
        try {
            after();
        } catch (Exception e) {
            exception = e;
        }

        session.getTransaction().rollback();
        session.close();
        sessionFactory.close();

        if (exception != null) {
            throw exception;
        }
    }

    protected abstract void after() throws Exception;
}