How to mock an object which with annnotation of @InjectMock using Mockito

Question

I want to mock Service to unit test the Controller layer in my spring application. while there are some method in the controller need to be mock. i.e. An controller class is as following:

@Controller 
@RequestMapping("/execution-unit")
public class ExecutionUnitController {
    @Resource
    private IRoleService roleService;

    @RequestMapping("/list")
    public ModelAndView list(HttpServletRequest request) {
        ModelAndView view = new ModelAndView("execution-unit/list");
        User user = this.getUser();
        view.addObject("user", user);

        // if the operator has media role
        if (user != null) {
            if (roleService.ifUserHasRole(user.getId(), RoleType.MEDIA)
                    || roleService.ifUserHasRole(user.getId(), RoleType.MEDIALLEADER)) {
                view.addObject("isMedia", true);
            }
        }
        return view;
    }

    // get the current user
    public User getUser() {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if(authentication!=null){
            Object obj = authentication.getPrincipal();
            if (obj instanceof User) {
                return (User) obj;

            }
        }
        return null;
    }
}

The Test Unit is as following:

@ContextConfiguration(locations = {"classpath:testApplicationContext.xml"})
@RunWith(SpringJUnit4ClassRunner.class)
@Transactional
@TransactionConfiguration(transactionManager = "transactionManager", defaultRollback = true)
@WebAppConfiguration
public class ExecutionUnitControllerTest {
    @Mock
    private IRoleService roleService;

    @InjectMocks
    @Resource
    private ExecutionUnitController executionUnitController;

    private MockMvc mockMvc;

    @Autowired
    private WebApplicationContext webApplicationContext;

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

    @Test
    public void testList() throws Exception {
        User user = new User();
        user.setId(2);

        when(executionUnitController.getUser()).thenReturn(user); // this line throw exception
        when(roleService.ifUserHasRole(user.getId(), Role.RoleType.MEDIA)).thenReturn(true);

        this.mockMvc.perform(get("/execution-unit/list"))
                .andExpect(status().isOk())
                .andExpect(forwardedUrl("/jsp/execution-unit/list.jsp"))
                .andExpect(model().attribute("isMedia", true))
                .andExpect(model().attribute("user", user));
    }
}

But, the test unit's result is throw an exception, the exception infomation is as following:

2013-11-27 11:48:06,240 INFO [org.springframework.test.context.transaction.TransactionalTestExecutionListener] - 

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.
2. inside when() you don't call method on mock but on some other object.
    at com.sohu.tv.crm.contoller.ExecutionUnitControllerTest.testList(ExecutionUnitControllerTest.java:84)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:76)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

And I had tried to use @Spy annotation:

@Spy
private ExecutionUnitController blogController;

it also throw an exception:

org.mockito.exceptions.base.MockitoException: Cannot create a @Spy for 'executionUnitController' field because the *instance* is missing
The instance must be created *before* initMocks();
Example of correct usage of @Spy:
   @Spy List mock = new LinkedList();
   //also, don't forget about MockitoAnnotations.initMocks();

may be i don't add the @Resource annotation, so i add it before ExecutionUnitController,but the roleService and executionUnitController don't acted using the mock way i expected, it called the real method.

How to mock an object which with annnotation of @InjectMock using Mockito

Answers (1)

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