JPA와 DB 설정, 동작확인 관련 문의

JPA와 DB 설정, 동작확인 강의를 듣는 도중 문제가 발생하여 질문드립니다.

MemberRepositoryTest클래스의 testMember메소드에 Transactional어노테이션을 추가하기 전에 에러가 떠야하는 걸로 알고있는데 에러가 따로 발생하지 않고 잘 실행이 되었으며 db에 Member테이블이 생성된 것을 확인할 수 있었습니다.

그 후 Transactional어노테이션을 추가하여 재실행한 결과 별다른 오류 없이 Run되었지만, Member테이블에는 값이 여전히 들어가지 않은 모습을 확인할 수 있었습니다.

연결은 된 것 같지만 값이 안들어가는 이유를 모르겠어서 질문드립니다.

package jpabook.jpashop;

import org.assertj.core.api.Assertions;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.annotation.Rollback;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.transaction.annotation.Transactional;

import static org.junit.Assert.*;

@RunWith(SpringRunner.class)
@SpringBootTest
public class MemberRepositoryTest {

    @Autowired MemberRepository memberRepository;

    @Test
    @Transactional
    @Rollback(value = false)
    public void testMember() throws Exception {
        //given
        Member member = new Member();
        member.setUsername("memberA");

        //when
        Long savedId = memberRepository.save(member);
        Member findMember = memberRepository.find(savedId);

        //then
        Assertions.assertThat(findMember.getId()).isEqualTo(member.getId());
        Assertions.assertThat(findMember.getUsername()).isEqualTo(member.getUsername());

    }
}

package jpabook.jpashop;

import org.springframework.stereotype.Repository;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

@Repository
public class MemberRepository {

    @PersistenceContext
    private EntityManager em;

    public Long save(Member member) {
        em.persist(member);
        return member.getId();
    }

    public Member find(Long id) {
        return em.find(Member.class, id);
    }
}

package jpabook.jpashop;

import lombok.Getter;
import lombok.Setter;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
@Getter @Setter
public class Member {

    @Id @GeneratedValue
    private Long id;
    private String username;

}

spring:
  datasource:
    url: jdbc:h2:tcp://localhost/~/jpashop
    username: sa
    password:
    driver-class-name: org.h2.Driver

  jpa:
    hibernate:
      ddl-auto: create
    properties:
      hibernate:
#        show_sql: true
        format_sql: true

logging:
  level:
    org.hibernate.SQL: debug
#    org.hibernate.type: trace

2022-02-23 12:15:07.939  INFO 29996 --- [  restartedMain] jpabook.jpashop.JpashopApplication       : No active profile set, falling back to default profiles: default

2022-02-23 12:15:07.961  INFO 29996 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable

2022-02-23 12:15:07.961  INFO 29996 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'

2022-02-23 12:15:08.181  INFO 29996 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.

2022-02-23 12:15:08.186  INFO 29996 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 2 ms. Found 0 JPA repository interfaces.

2022-02-23 12:15:08.395  INFO 29996 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)

2022-02-23 12:15:08.399  INFO 29996 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]

2022-02-23 12:15:08.399  INFO 29996 --- [  restartedMain] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.56]

2022-02-23 12:15:08.440  INFO 29996 --- [  restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext

2022-02-23 12:15:08.440  INFO 29996 --- [  restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 479 ms

2022-02-23 12:15:08.453  INFO 29996 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...

2022-02-23 12:15:08.471  INFO 29996 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.

2022-02-23 12:15:08.475  INFO 29996 --- [  restartedMain] o.s.b.a.h2.H2ConsoleAutoConfiguration    : H2 console available at '/h2-console'. Database available at 'jdbc:h2:tcp://localhost/~/jpashop'

2022-02-23 12:15:08.510  INFO 29996 --- [  restartedMain] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]

2022-02-23 12:15:08.525  INFO 29996 --- [  restartedMain] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.6.4.Final

2022-02-23 12:15:08.566  INFO 29996 --- [  restartedMain] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}

2022-02-23 12:15:08.596  INFO 29996 --- [  restartedMain] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect

2022-02-23 12:15:08.764 DEBUG 29996 --- [  restartedMain] org.hibernate.SQL                        : 

    drop table if exists member CASCADE 

2022-02-23 12:15:08.766 DEBUG 29996 --- [  restartedMain] org.hibernate.SQL                        : 

    drop sequence if exists hibernate_sequence

2022-02-23 12:15:08.767 DEBUG 29996 --- [  restartedMain] org.hibernate.SQL                        : create sequence hibernate_sequence start with 1 increment by 1

2022-02-23 12:15:08.768 DEBUG 29996 --- [  restartedMain] org.hibernate.SQL                        : 

    create table member (

       id bigint not null,

        username varchar(255),

        primary key (id)

    )

2022-02-23 12:15:08.769  INFO 29996 --- [  restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]

2022-02-23 12:15:08.772  INFO 29996 --- [  restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'

2022-02-23 12:15:08.806  WARN 29996 --- [  restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning

2022-02-23 12:15:08.872  INFO 29996 --- [  restartedMain] o.s.b.a.w.s.WelcomePageHandlerMapping    : Adding welcome page: class path resource [static/index.html]

2022-02-23 12:15:08.933  INFO 29996 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729

2022-02-23 12:15:08.953  INFO 29996 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''

2022-02-23 12:15:08.959  INFO 29996 --- [  restartedMain] jpabook.jpashop.JpashopApplication       : Started JpashopApplication in 1.151 seconds (JVM running for 1.595)

2022-02-23 12:24:38.447  WARN 29996 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Retrograde clock change detected (housekeeper delta=29s827ms), soft-evicting connections from pool.