Mockito 和 Powermockito org.mockito.exceptions.misusing.InvalidUseOfMatchersException：检测到错位的参数匹配器

Question

我想为以下 spring MVC 控制器编写单元测试用例。

@Controller
@Configuration
@PropertySource("classpath:project/web/properties/RealTimeAPI.properties")
@RequestMapping("/learnon")
public class ClassManagerController {

    private final Logger logger = Logger.getLogger(ClassManagerController.class);
    @Autowired
    private ClassManagerService classManagerService;

    @Autowired
    private GroupUserService groupUserService;

    @RequestMapping(value = "/teacher", method = RequestMethod.GET)
    public ModelAndView showClassDetail(HttpServletRequest request, HttpSession httpSession,
                                        @RequestParam(value = "isbn", required = false) String isbn13,
                                        @RequestParam(value = "classId", required = false) Long classId) {

        String redirectUrl = "https://example.com/jsp/Login.jsp?reason=failedLogin&redirectUri=https://example.com/secure/Bookshelf";
        String accessDeniedUri = "https://example.com/jsp/AccessDenied.jsp";

        if (httpSession.getAttribute("USERID") == null) {
            return new ModelAndView("redirect:" + redirectUrl);
        }
        try {
            long userId = Long.parseLong(httpSession.getAttribute("USERID").toString());
            UserBean user = classManagerService.getUser(userId);
            if (httpSession.getAttribute("SCHOOLID") == null) {
                httpSession.setAttribute("SCHOOLID", user.getSchoolId());
            }
            if (httpSession.getAttribute("FULLFILLMENT_YEAR") == null) {
                httpSession.setAttribute("FULLFILLMENT_YEAR", user.getFulfillmentYear());
            }
            String isbn10 = ISBNUtil.convertIsbn13ToIsbn10(isbn13);
            String title = "";

            ModelAndView mav = null;
            ClassManagerBean classBean = null;

            if(classId == null && httpSession.getAttribute("classId") != null){
                classId = (Long)httpSession.getAttribute("classId");
            }

            if(classId != null && classId > 0) {
                List<UserBean> userBeanList = classManagerService.getUserList(user.getSchoolId(), classId, isbn10);
                classBean = classManagerService.getClassById(classId);
                classBean.setUserNumber(userBeanList.size());
                title = classBean.getTitle();
                //Set the view to ClassManager.jsp
                mav = new ModelAndView("ClassManager");
                mav.addObject("userList", userBeanList);
                boolean authorized = userBeanList.stream().anyMatch(u->u.getUserId() == userId);
                if(!authorized){
                    ModelAndView modelAndView = new ModelAndView("redirect:" + accessDeniedUri);
                    modelAndView.addObject("accessDenied", "true");
                    return modelAndView;
                }
            }else{
                title = classManagerService.getTitle(isbn10);
                //Set the view to createNewClass.jsp
                mav = new ModelAndView("CreateNewClass");
                classBean = new ClassManagerBean();
                classBean.setLo2Flag(true);
                classBean.setIsbn(isbn10);
                classBean.setTitle(title);
            }
            httpSession.setAttribute("searchTitle", title);
            httpSession.setAttribute("selectedIsbn", isbn10);
            httpSession.setAttribute("classId", classId);
            mav.addObject("user", user);
            mav.addObject("classBean", classBean);
            return mav;
        } catch (Exception ex) {
            ModelAndView mav2 = new ModelAndView("redirect:" + accessDeniedUri);
            mav2.addObject("accessDenied", "true");
            logger.error("Exception Occurred, Redirecting to Access Denied...", ex);
            return mav2;
        }
    }

}

上面的class.

我写了下面的单元测试用例

@RunWith(PowerMockRunner.class) public class ClassManagerControllerTest {

public ClassManagerService classManagerService;
public GroupUserService groupUserService;

private MockMvc mockMvc;

@InjectMocks
private ClassManagerController classManagerController;



@Before
public void setUp()  {
    classManagerService = Mockito.mock(ClassManagerService.class);
    groupUserService = Mockito.mock(GroupUserService.class);

    mockMvc = MockMvcBuilders.standaloneSetup(classManagerController).build();
}

@Test
public void testShowClassDetail() throws Exception {


    HttpServletRequest httpRequest = mock(HttpServletRequest.class);
    HttpSession httpSession = mock(HttpSession.class);

    Mockito.when(httpSession.getAttribute("USERID")).thenReturn(null);

    RequestBuilder request = MockMvcRequestBuilders
            .get("/learnon/teacher")
            .param("isbn", "1234567890123")
            .param("classId", "1")  
            .accept(MediaType.APPLICATION_JSON);

    String modalView = "redirect:" + "https://example.com/jsp/Login.jsp?reason=failedLogin&redirectUri=https://www.example.com/secure/Bookshelf";

    ResultActions result = mockMvc.perform(request)
            .andExpect(status().is3xxRedirection())
            .andExpect(view().name(modalView));


}


@Test
public void testShowClassDetail1() throws Exception {


    HttpServletRequest httpRequest = mock(HttpServletRequest.class);
    HttpSession httpSession = mock(HttpSession.class);

    Mockito.when(httpSession.getAttribute("USERID")).thenReturn(Mockito.anyString());

    //Line 87
    List<UserBean> spyList = Mockito.mock(List.class);

    Mockito.when(classManagerService.getUserList(Mockito.anyLong(), Mockito.anyLong(), Mockito.anyString())).thenReturn(spyList);

    Mockito.when(spyList.stream().anyMatch(u->u.getUserId() == Mockito.anyLong())).thenReturn(true);

    RequestBuilder request = MockMvcRequestBuilders
            .get("/learnon/teacher")
            .param("isbn", "1234567890123")
            .param("classId", "1")  
            .accept(MediaType.APPLICATION_JSON);


    String modalView = "redirect:" + "https://example.com/jsp/AccessDenied.jsp";

    ResultActions result = mockMvc.perform(request)
            .andExpect(status().is3xxRedirection())
            .andExpect(view().name(modalView));

   }

第一个单元测试用例成功通过。

第二次测试失败，出现以下错误。

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: Misplaced argument matcher detected here:

-> at learnonclassmanager.spring.web.controller.ClassManagerControllerTest.testShowClassDetail1(ClassManagerControllerTest.java:87)

You cannot use argument matchers outside of verification or stubbing. Examples of correct usage of argument matchers: when(mock.get(anyInt())).thenReturn(null); doThrow(new RuntimeException()).when(mock).someVoidMethod(anyObject()); verify(mock).someMethod(contains("foo"))

Also, this error might show up because you use argument matchers with methods that cannot be mocked. Following methods cannot be stubbed/verified: final/private/equals()/hashCode(). Mocking methods declared on non-public parent classes is not supported.

at learnonclassmanager.spring.web.controller.ClassManagerControllerTest.testShowClassDetail1(ClassManagerControllerTest.java:90) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

Answer 1

问题出在代码上：

Mockito.when(httpSession.getAttribute("USERID")).thenReturn(Mockito.anyString());

httpSession.getAttribute("USERID") 实际上是 returns "Object"，而你返回的是一个字符串。

如果你尝试，

Mockito.when(httpSession.getAttribute("USERID")).thenReturn(new String("anyString"));,

那我工作就好了

希望对你有用。

Mockito 和 Powermockito org.mockito.exceptions.misusing.InvalidUseOfMatchersException：检测到错位的参数匹配器

Mockito and Powermockito org.mockito.exceptions.misusing.InvalidUseOfMatchersException: Misplaced argument matcher detected

java

unit-testing

mockito

powermock