Question

我是JUnit的新手并尝试测试使用JPA DAO的spring Web服务。我需要测试类似于下面的服务方法。

使用@Transactional(propagation=Propagation.REQUIRED)注释服务方法，ServiceObjectRepository.update()方法调用本机sql查询来更新数据库。

@Transactional(propagation=Propagation.REQUIRED)    
public void serviceMethod(){
        //Read DB for ServiceObject to update
        //Call  ServiceObjectRepository.update() method to update DB
}

ServiceObjectRepository

public interface ServiceObjectRepository  extends JpaRepository<ServiceObject, Integer> {

    @Query(value ="UPDATE serviceobjcet AS c SET c.objectstatus= :os WHERE c.objid = :oi", nativeQuery = true)
    public Integer update(@Param("os")short objStatus,@Param("oi")int objId);    
}

识别TestClass

@TransactionConfiguration(defaultRollback=true)
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(
        locations = "classpath:service-test.xml")
@Transactional
public class ServiceHandlerTest {

    @Test
    public void testServiceMethod() {

        //Create ServiceObject and save to DB
        //Call serviceMethod()
        //Read DB for updatedServiceObject

        assertEquals("Test: Object should be in updated state", new Short(3), updatedServiceObject.getObjectstatus(), 0);

   }
}

我的测试运行并回滚数据库事务。但问题是当我在调用updatedServiceObject后读取serviceMethod时它没有返回更新的对象。所以我的测试失败了assertEquals的NullPointerException。有没有想过克服这个问题？

Answer 1

最后，我提出了一个解决方案，而不是在测试方法中创建ServiceObject并保存到DB，而是在测试方法之前完成它并在事务之后删除创建的对象。所以我的测试类看起来像，

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:service-test.xml")

public class ServiceHandlerTest {

    @Before
    public void setup() {
        //Create ServiceObject and save to DB
    }


    @Test
    public void testServiceMethod() {
        //Call serviceMethod()
        //Read DB for updatedServiceObject

        assertEquals("Test: Object should be in updated state", new Short(3), updatedServiceObject.getObjectstatus(), 0);
    }

    @After
    public void teardown() {
        //Delete created ServiceObject from DB
    }
}

我发现测试方法或测试类在这种情况下不需要是事务性的。

JUnit测试事务方法

1 个答案: