[SpringBoot] 스프링 백엔드 개발 예제 - 회원 서비스

회원 도메인과 리포지토리 만들기

 

class MemoryMemberRepositoryTest {

    MemoryMemberRepository repository = new MemoryMemberRepository();

    @AfterEach // 메소드가 끝나고 호출하는 콜백백 메소
    public void afterEach() {
        repository.clearStore();
    }

    @Test
    public void save() {
        Member member = new Member();
        member.setName("spring");
        repository.save(member);

//        Member result = repository.findById(member.getId()).get();
//        System.out.println("result = " + (result == member));
//        Assertions.assertEquals(member, result);
        Member result = repository.findById(member.getId()).get();
        assertThat(member).isEqualTo((result));
    }

    @Test
    public void findByName() {
        Member member1 = new Member();
        member1.setName("spring1");
        repository.save(member1);

        Member member2 = new Member();
        member1.setName("spring1");
        repository.save(member2);

        Member result = repository.findByName("spring1").get();

        assertThat(result).isEqualTo(member1);
    }

    @Test
    public void findAll() {
        Member member1 = new Member();
        member1.setName("spring1");
        repository.save(member1);

        Member member2 = new Member();
        member1.setName("spring1");
        repository.save(member2);

        List<Member> result = repository.findAll();
        assertThat(result.size()).isEqualTo(2);
    }


}

package hello.hellospring.service;

import hello.hellospring.domain.Member;
import hello.hellospring.repository.MemoryMemberRepository;
import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.util.Optional;

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

class MemberServiceTest {

    MemberService memberService;
    MemoryMemberRepository memberRepository;

    @BeforeEach
    public void beforeEach() {
        memberRepository = new MemoryMemberRepository();
        memberService = new MemberService(memberRepository);
    }

    @AfterEach
    public void afterEach() {
        memberRepository.clearStore();
    }


    @Test
    void 회원가입() {
        // given
        Member member = new Member();
        member.setName("hello");

        // when
        Long saveId = memberService.join(member);

        //then
        Member findMember = memberService.findOne(saveId).get();
        assertThat(member.getName()).isEqualTo(findMember.getName());
    }

    @Test
    public void 중복_회원_예외() {
        // given
        Member member1 = new Member();
        member1.setName("spring");

        Member member2 = new Member();
        member2.setName("spring");

        // when
        memberService.join(member1);
        IllegalStateException e = assertThrows(IllegalStateException.class, () -> memberService.join(member2));
        assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");

/*
        memberService.join(member1);
        try{
            memberService.join(member2);
            fail();
        }catch (IllegalStateException e){
            assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");
        }
*/

        // then

    }

    @Test
    void findMembers() {
    }

    @Test
    void findOne() {
    }
}

중요개념

• @Test : Test 메소드 선언
• @AfterEach: 메소드가 끝나고 호출 되는 콜백 메소드. 메모리 초기화 같은 작업을 진행
• @BeforeEach : 메소드가 시작되기전 호출되는 콜백 메소드
• 테스트 메소드는 순서가 보장되지 않기 때문에 @AfterEach 어노테이션을 사용하여 사후 작업을 진행해줘야한다
• Optional 타입 : Null을 반환할 수도 있을 경우 Optional 타입으로 감싸서 반환한다.
• 테스트 메소드명은 한글로 만들어도 된다 (빌드될때 테스트 코드는 포함되지 않음)
• given / when / then