2장 스프링 부트에서 테스트 코드를 작성하자

# 테스트 코드 작성

---

package com.thuthi.springboot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

package com.thuthi.springboot.web;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {
    @GetMapping("/hello")
    public String hello() {
        return "hello";
    }
}

package com.thuthi.springboot.web;

import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.test.context.junit.jupiter.SpringExtension;
import org.springframework.test.web.servlet.MockMvc;

@ExtendWith(SpringExtension.class)
@WebMvcTest
public class HelloControllerTest {
    @Autowired
    private MockMvc mvc;

    @Test
    public void hello가_리턴된다() throws Exception {
        String hello = "hello";

        mvc.perform(get("/hello"))
                .andExpect(status().isOk())
                .andExpect(content().string(hello));
    }
}

 

# Junit5로 변경

---

책에서는 Junit4로 진행하는데, Junit5로 변경하여 진행했다.

가장 큰 차이점은,

@RunWith(SpringRunner.class) $\rightarrow$ @ExtendWith(SpringExcetion.class)

import org.junit.test $\rightarrow$ import org.junit.jupiter.api.Test

이렇게 2개다.

 

# Lombok 설치 및 변경

---

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
    implementation 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
}

lombok 패키지를 추가해주고, lombok 플러그인을 설치해야하는데, 이미 설치 되어 있으므로 생략.

 

# Lombok으로 DTO 만들기

---

package com.thuthi.springboot.web.dto;

import lombok.Getter;
import lombok.RequiredArgsConstructor;

@Getter
@RequiredArgsConstructor
public class HelloResponseDto {
    private final String name;
    private final int amount;
}

package com.thuthi.springboot.web.dto;

import static org.assertj.core.api.Assertions.*;

import org.junit.jupiter.api.Test;

class HelloResponseDtoTest {

    @Test
    public void 롬복_기능_테스트() throws Exception {
        // given
        String name = "test";
        int amount = 1000;

        // when
        HelloResponseDto dto = new HelloResponseDto(name, amount);

        // then
        assertThat(dto.getName()).isEqualTo(name);
        assertThat(dto.getAmount()).isEqualTo(amount);
    }
}