模拟：when（）需要参数必须是'模拟方法调用'

我正在为我的REST-API编写单元测试，并且在创建实体模拟时遇到了一些问题。我不知道我该如何模拟EntityManager。我尝试了下面的例子，但是我得到了一个错误。模拟：when（）需要参数必须是'模拟方法调用'

我ControllerTest：

public class MControllerTest { 

    private MockMvc mockMvc; 

    @InjectMocks A a; 
    @InjectMocks B b; 
    @InjectMocks AController aController; 
    @InjectMocks private AServiceImpl aServiceImpl; 

    @Autowired WebApplicationContext webApplicationContext; 
    @Autowired private FilterChainProxy springSecurityFilterChain; 

    @Autowired 
    @InjectMocks 
    private EntityManagerFactory entityManagerFactory; 


    @Before 
    public void setUp() { 
     MockitoAnnotations.initMocks(this); 
     mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext) 
           .addFilter(springSecurityFilterChain) 
           .build(); 
    } 

    @Test 
    public void postATest() throws Exception { 

     a.setDDDD("XXX"); 

     EntityManagerFactory entityManagerFactory = webApplicationContext.getBean(EntityManagerFactory.class); 
     EntityManager entityManager = entityManagerFactory.createEntityManager(); 
     when(this.entityManagerFactory.createEntityManager()).thenReturn(entityManager); 

     when(aServiceImpl.createEntity(isA(A.class))).thenReturn(a); 

     b.setCCCC; 
     a.setMovieTranslations(Arrays.asList(b)); 

     when(aServiceImpl.createEntity(isA(B.class))).thenReturn(a); 

     mockMvc.perform(post("/path") 
       .andExpect(status().isOk()) 
       .andReturn().getResponse().getContentAsString(); 
    }

的createEntityMethod：

public Object createEntity(T t) { 
    try { 
     entityManager.persist(t); 
     return t; 
    } catch (IllegalArgumentException | EntityExistsException | ... 
}

错误日志：

org.mockito.exceptions.misusing.MissingMethodInvocationException: 
when() requires an argument which has to be 'a method call on a mock'. 
For example: 
    when(mock.getArticles()).thenReturn(articles); 

Also, this error might show up because: 
1. you stub either of: final/private/equals()/hashCode() methods. 
    Those methods *cannot* be stubbed/verified. 
    Mocking methods declared on non-public parent classes is not supported. 
2. inside when() you don't call method on mock but on some other object. 

    at com.x.server.controller.MControllerTest.postATest(MControllerTest.java:121)

当我不上了EntityManager注入模拟对象，我得到了带有此错误日志的坚持方法的空指针异常：

java.lang.NullPointerException: null 
    at com.x.server.serviceImpl.AManageServiceImpl.createEntity(AManageServiceImpl.java:45) 
    at com.eza.server.controller.MControllerTest.postATest(MControllerTest.java:123)

有人可以帮我吗？

来源

2016-02-07 emoleumassi

我不知道为什么你混的春天一样的Mockito那。要么你需要这些“真正的”豆，那么你正在创建一个整合测试，你很可能不需要mockito。或者你正在创建一个单元测试，每个依赖bean被嘲笑。 – Tom

你是对的。谢谢。你评论解决我的问题。它正在工作。我现在只使用mockito。 – emoleumassi

很高兴听到。请写下你现在工作的代码和你已经改变的答案，以便将来的读者可以从中学习:)。 – Tom

解决它。我只是用entitymanager接口删除了一些代码行，它工作。

public class MControllerTest { 

    private MockMvc mockMvc; 

    @InjectMocks A a; 
    @InjectMocks B b; 
    @InjectMocks AController aController; 

    @Autowired WebApplicationContext webApplicationContext; 
    @Autowired private FilterChainProxy springSecurityFilterChain; 

    @Before 
    public void setUp() { 
     MockitoAnnotations.initMocks(this); 
     mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext) 
           .addFilter(springSecurityFilterChain) 
           .build(); 
    } 

    @Test 
    public void postMovieTest() throws Exception { 

     a.setDDDD("XXX"); 
     b.setCCCC; 
     a.setMList(Arrays.asList(b)); 


     mockMvc.perform(post("/path") 
      .content(asJsonString(a)) 
      .contentType(MediaType.APPLICATION_JSON) 
      .accept(MediaType.APPLICATION_JSON) 
      .andExpect(status().isOk()) 
      .andReturn().getResponse().getContentAsString(); 
    }

asJsonString是我自己写的方法对象转换为JSON

干杯

来源

2016-02-09 08:30:16 emoleumassi

模拟：when（）需要参数必须是'模拟方法调用'

回答

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