Spring 통합 테스트 [H2]

Spring 통합 테스트

→ Spring Container 와 DB를 연결하여 통합 테스트 진행

package hello.hellospring.service;

import hello.hellospring.domain.Member;
import hello.hellospring.repository.MemberRepository;
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 org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.transaction.annotation.Transactional;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;

@SpringBootTest
@Transactional
class MemberServiceIntegrationTest {

    // Container 한테 Service 와 Repository 를 부름
    // field 기반으로 injection
    @Autowired MemberService memberService;
    @Autowired MemberRepository memberRepository;

    @Test
    public void join() 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
    void 중복회원방지() 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));

        Assertions.assertThat(e.getMessage()).isEqualTo("Already Exist.");

        // then

    }
}

• SpringBoot Test
  : Container 와 함께 테스트 실행

• Transactional
  : 테스트 케이스에 @Transactional 어노테이션이 있다면, Transactional 을 먼저 실행해서 모든 테스트 진행 후 데이터 베이스를 롤백 시킴 (DB에 데이터 반영이 안됨)

순수한 단위 테스트가 제일 좋은 테스트라고 할 수 있음

Spring JDBC templates

MyBatis 같은 라이브러리는 JDBC API에서 본 반복 코드를 대부분 제거, But SQL은 직접 작성해야 함

Repository/JdbcTemplateMemberRepository.java

package hello.hellospring.repository;

import hello.hellospring.domain.Member;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.simple.SimpleJdbcInsert;

import javax.sql.DataSource;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;

public class JdbcTemplateMemberRepository implements MemberRepository {

    private JdbcTemplate jdbcTemplate;

    // @Autowired 생성자가 하나일 경우 생략 가능
    public JdbcTemplateMemberRepository(DataSource dataSource){
        jdbcTemplate = new JdbcTemplate(dataSource);
    }

    @Override
    public Member save(Member member) {
        SimpleJdbcInsert jdbcInsert = new SimpleJdbcInsert(jdbcTemplate);
        jdbcInsert.withTableName("member").usingGeneratedKeyColumns("id");

        Map<String, Object> parameters = new HashMap<>();
        // query 사용하지 않고 편리하게 insert 가능
        parameters.put("name", member.getName());

        Number key = jdbcInsert.executeAndReturnKey(new MapSqlParameterSource(parameters));
        member.setId(key.longValue());

        return member;    }

    @Override
    public Optional<Member> findById(Long id) {
        // template method pattern
        List<Member> result = jdbcTemplate.query("select * from member where id = ?", memberRowMapper(),id);
        return result.stream().findAny();
    }

    @Override
    public Optional<Member> findByName(String name) {
        List<Member> result = jdbcTemplate.query("select * from member where name = ?", memberRowMapper(),name);
        return result.stream().findAny();
    }

    @Override
    public List<Member> findAll() {
        return  jdbcTemplate.query("select * from member", memberRowMapper());
    }

    // 객체 생성
    private RowMapper<Member> memberRowMapper(){
        // java lambda style
        return (rs, rowNum) -> {
             Member member = new Member();
             member.setId(rs.getLong( "id"));
             member.setName(rs.getString("name"));
             return member;
        };
    }
}