Java – write JUnit tests for @ exceptionhandler

I am writing a rest service using spring MVC This is the outline of the course:

@Controller
 public class MyController{

     @RequestMapping(..)
     public void myMethod(...) throws NotAuthorizedException{...}

     @ExceptionHandler(NotAuthorizedException.class)
     @ResponseStatus(value=HttpStatus.UNAUTHORIZED,reason="blah")
     public void handler(...){...}
 }

I wrote my unit tests and released here using the design The basic tests are as follows:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(....)
public class mytest{

    MockHttpServletRequest requestMock;
    MockHttpServletResponse responseMock;
    AnnotationMethodHandlerAdapter handlerAdapter;

@Before
public void setUp() {
    requestMock = new MockHttpServletRequest();
    requestMock.setContentType(MediaType.APPLICATION_JSON_VALUE);
    requestMock.addHeader(HttpHeaders.ACCEPT,MediaType.APPLICATION_JSON_VALUE);

    responseMock = new MockHttpServletResponse();

    handlerAdapter = new AnnotationMethodHandlerAdapter();
}

@Test
public void testExceptionHandler(){
    // setup ....
    handlerAdapter.handle(...);

    // verify
    // I would like to do the following
    assertThat(responseMock.getStatus(),is(HttpStatus.UNAUTHORIZED.value()));
}

}

However, the call to handle throws notauthorizedexception I have read this design so that I can unit test the method to throw the appropriate exception, but I want to write an automatic test. The framework handles the exception correctly, and the tested class implements the handler correctly Is there any way to do this?

Please note that I cannot access the actual code where I can publish

In addition, I am interested in spring 3.0 5 or 3.1 Limited (unfortunately)

Solution

Consider using spring 3.2 and its MVC test framework

import static org.springframework.test.web.servlet.setup.mockmvcBuilders.*;
import static org.springframework.test.web.servlet.request.mockmvcRequestBuilders.*;
import static org.springframework.test.web.servlet.result.mockmvcResultMatchers.*;

@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration("file:src/main/webapp/WEB-INF/spring/appServlet/servlet-context.xml")
public class WebMvcTest {

    @Autowired
    private WebApplicationContext wac;

    private mockmvc mockmvc;

    @Before
    public void setup() {
        this.mockmvc = mockmvcBuilders.webAppContextSetup(this.wac).build();
    }

    @Test
    public void getFoo() throws Exception {
        this.mockmvc.perform(
            get("/testx")
            .contentType(MediaType.APPLICATION_JSON)
            .accept(MediaType.APPLICATION_JSON)
            )
            .andExpect(status().isUnauthorized());
    }
}

Controller code

@Controller
public class MyController {

    public class MyException extends RuntimeException {
    };

    @RequestMapping("/testx")
    public void myMethod() {
        throw new MyException();

    }

    @ExceptionHandler(MyException.class)
    @ResponseStatus(value = HttpStatus.UNAUTHORIZED,reason = "blah")
    public void handler() {
        System.out.println("handler processed");
    }
}

The test went well

Disclaimer: at present, I am noob in the spring MVC test, which is actually my first test UPD: thanks for Drake for the correction