java - Spring Boot 测试 : Test passes, 但不应该(误报)

Question

我有一个 Spring Boot 项目，测试没有失败(但应该失败)。

是我做错了什么还是 Spring 的问题？

作为一个小示例，我创建了一个包含 2 个实体(用户和类别)和一个具有 DELETE 方法 (https://github.com/sk8ter/demo) 的 Controller 类的小项目。

类别实体的 ID 为用户实体，没有级联 选项，因此在删除具有类别的用户时应该会失败:

@Entity
@Table(name = "user")
public class User {

    @Id
    @GeneratedValue
    private long id;
    private String name;
    ...
}

@Entity
@Table(name = "category")
public class Category {

    @Id
    @GeneratedValue
    private long id;
    private String name;

    @ManyToOne
    @JoinColumn(name = "user_id", nullable = false)
    private User user;
    ...
}

Controller 也很简单:

@RestController
@RequestMapping(value = "/users", produces = "application/json;charset=UTF-8")
public class UserCategory {

    @Autowired
    private UserRepository userRepository;

    @ResponseStatus(HttpStatus.OK)
    @RequestMapping(value = "/{id}", method = DELETE, consumes =   MediaType.ALL_VALUE)
    public void deleteCategory(@PathVariable Long id) {
        User user = userRepository.getOne(id);
        userRepository.delete(user);
    }
}

最后是一个测试:

@Transactional
@WebAppConfiguration
@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = DemoApplication.class)
public class DemoApplicationTests {

    @Autowired
    protected WebApplicationContext context;

    protected MockMvc mockMvc;

    @Before
    public void setUp() {
        mockMvc = MockMvcBuilders.webAppContextSetup(this.context).build();
    }

    @Test
    public void testName() throws Exception {
        mockMvc.perform(delete("/users/1"))
                .andExpect(status().isOk());

//      EntityManagerFactory entityManagerFactory = context.getBean(EntityManagerFactory.class);
//      SessionFactory sessionFactory = entityManagerFactory.unwrap(SessionFactory.class);
//      sessionFactory.getCurrentSession().flush();
    }
}

如果我从 DemoApplicationTests 中删除 @Transactional 注释，测试将失败，但在这种情况下，更改将提交给数据库。

在测试中注释 3 行也无济于事。

Answer 1

我不想用 @Rollback(false) 注释方法或类，因为我希望我所有的测试都是 idempotent .如果我注释 @Rollback(false)，H2 也会因外键约束而失败。

我找到了一个解决方案:

@Transactional
@WebAppConfiguration
@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = DemoApplication.class)
public class DemoApplicationTests {

    @Autowired
    protected WebApplicationContext context;

    protected MockMvc mockMvc;

    @PersistenceContext
    EntityManager em;

    @Before
    public void setUp() {
        mockMvc = MockMvcBuilders.webAppContextSetup(this.context).build();
    }

    @Test
    public void testName() throws Exception {
        mockMvc.perform(delete("/users/1"))
                .andExpect(status().isOk());

        em.flush();
    }
}

关键行:

@PersistenceContext
EntityManager em;
...
// Manual flush is required to avoid false positive in test
em.flush();

因此 SessionFactory 从 Spring Documentation 开始不起作用

// Manual flush is required to avoid false positive in test
sessionFactory.getCurrentSession().flush();