Spring TestRestTemplate authentication

I am trying to build Spring Boot test to test rest api, so that I can get Principal from request and use that to identify user. Server returns {"timestamp":1502014507361,"status":403,"error":"Forbidden","message":"Access Denied","path":"/hello"}

What am I missing here?

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class RestTemplateTest {

    @Autowired
    TestRestTemplate testRestTemplate;

    @LocalServerPort
    private int serverPort;

    @Test
    public void testit() {

        testRestTemplate.withBasicAuth("user", "password");
        String responsePayload = testRestTemplate.getForObject("/hello", String.class);
    }



@RestController
public class GreetingController {

    @RequestMapping("/hello")
    public String heipat(Principal principal) {
        String string = "hello there";
        return string;
    }



    @Configuration
    @EnableWebSecurity
    static class WebSecurityConfig extends WebSecurityConfigurerAdapter {

        @Override
        public void configure(HttpSecurity httpSecurity) throws Exception {
            httpSecurity.authorizeRequests().anyRequest().hasRole("USER");
        }

        @Autowired
        public void configureGlobal(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
            authenticationManagerBuilder.inMemoryAuthentication()
                    .withUser("user").password("password").roles("USER");
        }

    }