[스프링 입문]Member Service 개발 & Service 테스트

Optional<Member> result = memberRepository.findByName(member.getName());
result.ifPresent(m -> {
throw new IllegalStateException("이미 존재하는 회원입니다.");
});

memberRepository.findByName(member.getName())
        .ifPresent(m -> {
            throw new IllegalStateException("이미 존재하는 회원입니다.");
        });

 

extract method

ctrl + alt + M

 

test code 빠르게 만들기

ctl + shift + T

 

memberService.join(member2);


try {
    memberService.join(member3);
    fail();
}catch (IllegalStateException e) {
    Assertions.assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");
}

assertThrows(IllegalStateException.class, () -> memberService.join(member3));

IllegalStateException e = assertThrows(IllegalStateException.class, () -> memberService.join(member3));
Assertions.assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");

 

 

Service 개발

package hello.hellospring.service;

import hello.hellospring.domain.Member;
import hello.hellospring.repository.MemberRepository;
import hello.hellospring.repository.MemoryMemberRepository;

import java.util.List;
import java.util.Optional;

public class MemberService {

    private final MemberRepository memberRepository;
// 외부에서 주입
    public MemberService(MemberRepository memberRepository) {
        this.memberRepository = memberRepository;
    }

    public Long join(Member member) {
        // 같은 이름이 있는 중복 회원 x
        // memberRepository.findByName(member.getName());
        validateDuplicateMember(member); // 중복 회원 검증
        memberRepository.save(member);
        return member.getId();
    }

    private void validateDuplicateMember(Member member) {
        memberRepository.findByName(member.getName())
                .ifPresent(m -> {
                    throw new IllegalStateException("이미 존재하는 회원입니다.");
                });
    }
/*
*  현재 회원 조회
* */
    public List<Member> findMembers() {
        return memberRepository.findAll();
    }

    public Optional<Member> findOne(Long memberId) {
        return memberRepository.findById(memberId);
    }
}

 

Service 테스트

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 static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.jupiter.api.Assertions.*;

class MemberServiceTest {
    MemberService memberService;
    MemoryMemberRepository memberRepository;

    @BeforeEach
    public void beforeEach(){ // 같은 repository를 사용하기 위해 = DI
        memberRepository = new MemoryMemberRepository();
        memberService = new MemberService(memberRepository);
    }
    @AfterEach
    public void afterEach() {
        memberRepository.clearStore();
    }

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

        //when
        Long saveId = memberService.join(member1);
        //then
        Member findMember = memberService.findOne(saveId).get();
        Assertions.assertThat(member1.getName()).isEqualTo(findMember.getName());

    }
    @Test
    public void 중복_회원_예외() {
        //given
        Member member2 = new Member();
        member2.setName("Spring");

        Member member3 = new Member();
        member3.setName("Spring");

        //shen
        memberService.join(member2);
        // 이 예외가 터지는가
        IllegalStateException e = assertThrows(IllegalStateException.class, () -> memberService.join(member3));
        Assertions.assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");

//        try {
//            memberService.join(member3);
//            fail();
//        }catch (IllegalStateException e) {
//            Assertions.assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");
//        }
        //then
    }

    @Test
    void findMembers() {
    }

    @Test
    void findOne() {
    }
}