@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests().antMatchers("/admin*").access("hasRole('ADMIN')").antMatchers("/**").permitAll().and().formLogin();
    }

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

@RunWith(SpringRunner.class)
@WebMvcTest(value = ExampleController.class)
public class ExampleControllerMockMVCTest {

    @Autowired
    private MockMvc mockMvc;

    @Test
    public void indexTest() throws Exception {
        mockMvc.perform(get("/"))
        .andExpect(status().isOk())
        .andExpect(view().name("index"));
    }

    @Test
    public void adminTestWithoutAuthentication() throws Exception {
        mockMvc.perform(get("/admin"))
        .andExpect(status().is3xxRedirection()); //login form redirect
    }

    @Test
    @WithMockUser(username="example", password="password", roles={"ANONYMOUS"})
    public void adminTestWithBadAuthentication() throws Exception {
        mockMvc.perform(get("/admin"))
        .andExpect(status().isForbidden());
    }

    @Test
    @WithMockUser(username="user", password="password", roles={"ADMIN"})
    public void adminTestWithAuthentication() throws Exception {
        mockMvc.perform(get("/admin"))
        .andExpect(status().isOk())
        .andExpect(view().name("admin"))
        .andExpect(model().attributeExists("name"))
        .andExpect(model().attribute("name", is("user")));
    }
}

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = WebEnvironment.MOCK)
@AutoConfigureMockMvc
public class ExampleControllerSpringBootTest {

    @Autowired
    private MockMvc mockMvc;

    // tests
}