Getting Started with @WebMvcTest

package com.tamingthymeleaf.application.user.web;
import com.tamingthymeleaf.application.user.UserService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.boot.test.context.TestConfiguration;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.context.annotation.Bean;
import org.springframework.security.crypto.factory.PasswordEncoderFactories;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.test.web.servlet.MockMvc;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.redirectedUrl;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
@WebMvcTest(UserController.class)
class UserControllerTest {
    @Autowired
    private MockMvc mockMvc; //<.>
    @MockBean
    private UserService userService; //<.>
    @Test
    void testGetUsersRedirectsToLoginWhenNotAuthenticated() throws Exception { //<.>
        mockMvc.perform(get("/users")) //<.>
               .andDo(print()) //<.>
               .andExpect(status().is3xxRedirection()) //<.>
               .andExpect(redirectedUrl("http://localhost/login")); //<.>
    }
    @TestConfiguration
    static class TestConfig { //<.>
        @Bean
        public PasswordEncoder passwordEncoder() { //<.>
            return PasswordEncoderFactories.createDelegatingPasswordEncoder();
        }
    }
}