是什么原因导致这种嘲讽的例外

Question

我正在为项目创建测试用例。该项目的设计方式，很难继续进行简单的单元测试，并且似乎缺少依赖性，以便将Mockito用于模拟功能和对象。这是我拥有的：

@RunWith(SpringRunner.class)
public class RequestHandlerTest {
    private byte[] buffer;
    private Connection conn;
    private Server server;
    @Mock ResponseHandler response;
    @Mock Services serviceImpl;
    @InjectMocks RequestHandler request;
    @Before
    // This just creates the buffer in order to simulate sending and 
    // receiving a response across a server and client
    public void createRequests(); 
    @After
    public void cleanUpBuffer(); // Cleans up buffer after test
    @Test
    public void TestReceiveMessage() {
        doNothing().when(response.updataCache(conn, reqID));
        ... // Do nothing for service function
        handler.receiveMsg(conn, buffer);
        // Verify request
    }
}

现在，每当我运行测试时，我都会得到以下例外：

 org.mockito.exceptions.base.MockitoException: At the moment you cannot provide own implementations of MockHandler.
Please see the javadocs for the MockMaker interface.
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.initMocks(MockitoTestExecutionListener.java:68)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.prepareTestInstance(MockitoTestExecutionListener.java:53)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at 
    org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
        at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
        at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
        at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
        at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)

我不确定是什么原因引起的，以及需要做什么才能解决此问题。我尝试设置初始化的oikito，并使用@Autowired将@mock更改为@mockbean，并尝试使用包装类别设置我的值。我可能会缺少一些东西吗？我以前从未见过。

Answer 1

首先，您无需在此处使用SpringRunner。用@RunWith(MockitoJUnitRunner.class)

替换@RunWith(SpringRunner.class)

其次，如果仍然出现此问题，请尝试使用下一步（假设请求Handlerimpl是请求Handler的实现）：

@InjectMocks RequestHandler request = new RequestHandlerImpl();

甚至@InjectMocks RequestHandlerImpl request

Answer 2

好的，所以在研究了这一点之后，我看到有很多自动化的豆子。因此，我需要为我有依赖性的类添加上下文配置。然后，我能够使用注释进行模拟和注入模拟。所以我的固定装置变成了这样的东西：

@RunWith(SpringRunner.class)
@ContextConfiguration(classes = {RequestHandler.class, ResponseHandler.class,
      DataCache.class, Service.class})
public class RequestHandlerTest {
   @Mock private ResponseHandler response;
   @Mock private Service serv;
   @InjectMocks
   @Resource
   private RequestHandler request;
   public void setUp() {
      MockitoAnnotations.initMocks(this);
      // Add mock data logic using doAnswer or doNothing for void methods if needed 
      // and adding when().then() for mocking return values for other functions
   }
   @Test
   public void makeRequest() {
      assertTrue(request.sendRequest(Object message));
   }
}

从嘲笑空隙方法中汲取信息，并从此处的这个问题中的答案中获取信息。

Answer 3

这是在Mockito2 2.x.x版本中解决的。

org.powermock powermock-api-mockito2 2.0.9测试