[Spring 스프링] 3. 회원 관리 예제 4 - 회원 서비스 개발 및 테스트

회원 서비스는 회원 리포지토리와 도메인을 활용해 실제 비즈니스 로직 만드는 것

 

회원 리포지토리 생성

package hello.hellospring.service;
import hello.hellospring.domain.Member;
import hello.hellospring.repository.MemberRepository;
import java.util.List;
import java.util.Optional;
public class MemberService {
 private final MemberRepository memberRepository = new
MemoryMemberRepository();
 /**
 * 회원가입
 */
 public Long join(Member member) {
 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.");
 });
 }
 /**
 * 전체 회원 조회
 */
 public List<Member> findMembers() {
 return memberRepository.findAll();
 }
 public Optional<Member> findOne(Long memberId) {
 return memberRepository.findById(memberId);
 }
}

 

테스트

 

package hello.hellospring.service;
import hello.hellospring.domain.Member;
import hello.hellospring.repository.MemoryMemberRepository;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
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
 public void 회원가입() throws Exception {
 //Given
 Member member = new Member();
 member.setName("hello");
 //When
 Long saveId = memberService.join(member);
 //Then
 Member findMember = memberRepository.findById(saveId).get();
 assertEquals(member.getName(), findMember.getName());
 }
 @Test
 public void 중복_회원_예외() throws Exception {
 //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));//예외가 발생해야 한다.
 assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");
 }
}