Spring Framework TEST RESTful Web Service (Controller) Offline i.e. No Server, No Database

Here is one suggestion that should give you some ideas. I assume that you are familiar with the SpringJUnit4ClassRunner and the @ContextConfiguration. Start by creating an test application context that contains PcUserController and a mocked PcUserService. In the example PcUserControllerTest class below, Jackson is used to convert JSON messages and Mockito is used for mocking.

@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(/* Insert test application context here */)public class PcUserControllerTest {    MockHttpServletRequest requestMock;    MockHttpServletResponse responseMock;    AnnotationMethodHandlerAdapter handlerAdapter;    ObjectMapper mapper;    PcUser pcUser;    @Autowired    PcUserController pcUserController;    @Autowired    PcUserService pcUserServiceMock;    @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();        HttpMessageConverter[] messageConverters = {new MappingJacksonHttpMessageConverter()};        handlerAdapter.setMessageConverters(messageConverters);        mapper = new ObjectMapper();        pcUser = new PcUser(...);        reset(pcUserServiceMock);    }}

Now, we have all the code needed to create the tests:

@Testpublic void shouldGetUser() throws Exception {    requestMock.setMethod("GET");    requestMock.setRequestURI("/pcusers/1");    when(pcUserServiceMock.read(1)).thenReturn(pcUser);    handlerAdapter.handle(requestMock, responseMock, pcUserController);    assertThat(responseMock.getStatus(), is(HttpStatus.SC_OK));    PcUser actualPcUser = mapper.readValue(responseMock.getContentAsString(), PcUser.class);    assertThat(actualPcUser, is(pcUser));}@Testpublic void shouldCreateUser() throws Exception {    requestMock.setMethod("POST");    requestMock.setRequestURI("/pcusers/create/1");    String jsonPcUser = mapper.writeValueAsString(pcUser);    requestMock.setContent(jsonPcUser.getBytes());    handlerAdapter.handle(requestMock, responseMock, pcUserController);    verify(pcUserServiceMock).create(pcUser);}