인프런 커뮤니티 질문&답변

package hello.servlet.domain.member;

import lombok.Getter;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MemberRepository  {
    private static Map<Long, Member> store = new HashMap<>();
    private static long sequence = 0L;

    @Getter
    private static final MemberRepository instance = new MemberRepository();

    private MemberRepository(){

    }

    public Member save(Member member){
        member.setId(++sequence);
        store.put(member.getId(), member);
        return member;
    }

    public Member findById(Long id){
        return store.get(id);
    }

    public List<Member> findAll(){
        return new ArrayList<>(store.values());
    }

    public void clearStore(){
        store.clear();
    }
}

package hello.servlet.domain.member;

import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

@Getter
@Setter
@NoArgsConstructor
public class Member {
    private Long id;
    private String username;
    private int age;

    public Member(String username, int age) {
        this.username = username;
        this.age = age;
    }
}

package hello.servlet.domain.member;

import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Test;


class MemberRepositoryTest {

    MemberRepository memberRepository = MemberRepository.getInstance();

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

    @Test
    void save(){
        //given
        Member member = new Member("hello",20);
        // when
        Member savedMember = memberRepository.save(member);

        // then
        Member findMember = memberRepository.findById(savedMember.getId());
        Assertions.assertThat(findMember).isEqualTo(savedMember);
    }
}

build -> intelij

jdk 설정 했는데 해결에 안되서 문의드립니다