Spring Boot Controller Unit Test

Spring Boot Controller Unit Test

@SpringBootTest(classes = XXXApplication.class) //if we change Application.class we must declare here what the application main class is
@RunWith(SpringRunner.class)
public class UserControllerTests {

    private MockMvc mockMvc;

    @Autowired
    WebApplicationContext webApplicationContext;

    @Before
    public void setup() {
        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.webApplicationContext).build();
    }

    @Test
    public void createUseerWithBadCredentialsWillReturnBadRequest() throws Exception{

        User user = new User();

         this.mockMvc.perform(post("/v1/user")
                 .accept(MediaType.APPLICATION_JSON)
                 .contentType(MediaType.APPLICATION_JSON)
                 .content(new ObjectMapper().writeValueAsString(customer)))
                 .andExpect(status().isBadRequest())
                 .andExpect(content().string(containsString("check your credentials")));
    }
}