How to preserve HttpServletRequest autowiring when testing with SpringMVC Mockito and PowerMockito - spring-mvc

Question

Hi I'm trying to write some tests with Mockito and PowerMockito (I need to mock private methods) for a rest service written with SpringMVC and I'm facing the following issue
This is the semplified version of the controller
#Controller
#RequestMapping(value = "/test")
public class SimpleController {
#Autowired
private HttpServletRequest httpRequest;
#RequestMapping(value = "/simpleservice", method = RequestMethod.POST, produces = "application/json;charset=UTF-8")
#ResponseBody
public SimpleServiceResponse simpleService(#RequestBody SimpleServiceRequest simpleServiceRequest, HttpServletRequest httpServletRequest) {
SimpleServiceResponse simpleServiceResponse=new SimpleServiceResponse(simpleServiceRequest.getValue());
httpRequest.getHeader("Header");
return simpleServiceResponse;
}
}
and this is the correspoding test class
#WebAppConfiguration
#RunWith(PowerMockRunner.class)
#PowerMockRunnerDelegate(SpringJUnit4ClassRunner.class)
#ContextConfiguration(locations = {"classpath:WebApplicationContext.xml","classpath:SimpleApplicationContext.xml"})
#PrepareForTest(WebController.class)
#TestExecutionListeners({DependencyInjectionTestExecutionListener.class})
public class TestSimpleControllerMockito {
private Logger logger = LoggerFactory.getLogger(TestSimpleControllerMockito.class.getName());
private ObjectMapper objectMapper= new ObjectMapper();
#InjectMocks
private SimpleController controller;
#Test
public void testSimpleService() throws Exception {
MockitoAnnotations.initMocks(this);
SimpleService mockedSimple = mock(SimpleService.class);
when(mockedSimple.doSimpleService(any(SimpleServiceRequest.class))).thenReturn(new SimpleServiceResponse("MockMock"));
SimpleController mockedController=PowerMockito.spy(controller);
SimpleServiceRequest simpleServiceRequest= new SimpleServiceRequest("ciao");
String requestAsStr=objectMapper.writeValueAsString(simpleServiceRequest);
MockMvc mMockMvc=MockMvcBuilders.standaloneSetup(mockedController).build();
MvcResult result= mMockMvc.perform(post("/test/simpleservice").content(requestAsStr).contentType(MediaType.APPLICATION_JSON))
.andExpect(status().isOk())
.andReturn();
String content = result.getResponse().getContentAsString();
SimpleServiceResponse simpleServiceResponse=objectMapper.readValue(content,SimpleServiceResponse.class);
Assert.assertEquals("MockMockMockedSessionManager",simpleServiceResponse.getValue());
}
}
When running the test case I got a NullPointerEception on httpRequest.getHeader("Header");
My guess is that using the #InjectMocks annotation and then using
SimpleController mockedController=PowerMockito.spy(controller);
is the cause of the NullPointerException. I don't know how to preserve the #Autowire annotation processing on the controller Object. I already found a workaround, but it requires to write some redundant code.
Is there a way to make the #autowired annotation work?
Thanks a lot.
P.S.
the SimpleServiceXXX classes are like this one:
public class SimpleServiceResponse {
private String value;
public SimpleServiceResponse() {
}
public SimpleServiceResponse(String value) {
this.value = value;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
}