java - 是什么导致了这个mockito异常？

Question

我正在为项目创建测试用例。该项目是如何设计的，很难继续进行简单的单元测试，并且似乎缺少依赖项以便使用 Mockito 来模拟函数和对象。这是我所拥有的:

@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，我都会收到以下异常:

 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导致此问题以及需要采取哪些措施来解决此问题。我尝试设置初始化 Mockito，使用 @Autowired 将 @Mock 更改为 @MockBean，还尝试使用包装类设置我的值。有什么我可能会错过的吗？我以前从未见过这个。

Answer 1

首先，这里不需要使用SpringRunner。将 @RunWith(SpringRunner.class) 替换为 @RunWith(MockitoJUnitRunner.class)

其次，如果还是出现这个问题，尝试使用next(假设RequestHandlerImpl是RequestHandler的实现):

@InjectMocks RequestHandler request = new RequestHandlerImpl();

甚至@InjectMocks RequestHandlerImpl请求