SpringBoot 자동 리소스 등록

스프링 부트는 application.properties에 있는 속성을 참고해서 DataSource를 생성하고 이를 스프링 빈으로 등록한다. (url 정보가 없으면 내장 DB를 생성)

application.properties

spring.datasource.url=jdbc:h2:tcp://localhost/~/test
spring.datasource.username=sa
spring.datasource.password=

트랜잭션 매니저, 데이터 소스 자동 등록

스프링 부트는 트랜잭션 매니저와 데이터 소스를 빈으로 자동으로 등록한다.

@Slf4j
@SpringBootTest
class MemberServiceV3_4Test {

    public static final String MEMBER_A = "memberA";
    public static final String MEMBER_B = "memberB";
    public static final String MEMBER_EX = "ex";

    @Autowired private MemberRepositoryV3 memberRepository;
    @Autowired private MemberServiceV3_3 memberService;

    @TestConfiguration
    static class TestConfig {

        private final DataSource dataSource;

        TestConfig(DataSource dataSource) {
            this.dataSource = dataSource;
        }


        @Bean
        MemberRepositoryV3 memberRepositoryV3() {
            return new MemberRepositoryV3(dataSource);
        }

        @Bean
        MemberServiceV3_3 memberServiceV3_3() {
            return new MemberServiceV3_3(memberRepositoryV3());
        }
    }

    @AfterEach
    void after() throws SQLException {
        memberRepository.delete(MEMBER_A);
        memberRepository.delete(MEMBER_B);
        memberRepository.delete(MEMBER_EX);
    }

    @Test
    void AopCheck() {
        log.info("memberService class={}", memberService.getClass());
        log.info("memberRepository class={}", memberRepository.getClass());
        Assertions.assertThat(AopUtils.isAopProxy(memberService)).isTrue();
        Assertions.assertThat(AopUtils.isAopProxy(memberRepository)).isFalse();
    }

    @Test
    @DisplayName("정상 이체")
    void accountTransfer() throws SQLException {
        //given
        Member memberA = new Member(MEMBER_A, 10000);
        Member memberB = new Member(MEMBER_B, 10000);
        memberRepository.save(memberA);
        memberRepository.save(memberB);

        //when
        memberService.accountTransfer(memberA.getMemberId(), memberB.getMemberId(), 2000);

        //then
        Member findMemberA = memberRepository.findById(memberA.getMemberId());
        Member findMemberB = memberRepository.findById(memberB.getMemberId());
        assertThat(findMemberA.getMoney()).isEqualTo(8000);
        assertThat(findMemberB.getMoney()).isEqualTo(12000);
    }

    @Test
    @DisplayName("이체중 예외 발생")
    void accountTransferEx() throws SQLException {
        //given
        Member memberA = new Member(MEMBER_A, 10000);
        Member memberEx = new Member(MEMBER_EX, 10000);
        memberRepository.save(memberA);
        memberRepository.save(memberEx);

        //when
        assertThatThrownBy(() -> memberService.accountTransfer(memberA.getMemberId(), memberEx.getMemberId(), 2000))
                .isInstanceOf(IllegalStateException.class);

        //then
        Member findMemberA = memberRepository.findById(memberA.getMemberId());
        Member findMemberB = memberRepository.findById(memberEx.getMemberId());
        assertThat(findMemberA.getMoney()).isEqualTo(10000);
        assertThat(findMemberB.getMoney()).isEqualTo(10000);
    }
}

참조
https://www.inflearn.com/course/%EC%8A%A4%ED%94%84%EB%A7%81-db-1