인프런 커뮤니티 질문&답변

jpa와 db설정, 동작확인 강의를 듣고 클론코딩 중

test중 NullPointerException에러발생

main

jpabook.jpashop.Member

package jpabook.jpashop;

import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.Id;
import lombok.Getter;
import lombok.Setter;

@Entity
@Getter @Setter
public class Member {

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

jpabook.jpashop.MemberRepository

package jpabook.jpashop;

import jakarta.persistence.EntityManager;
import jakarta.persistence.PersistenceContext;
import org.springframework.stereotype.Repository;

@Repository
public class MemberRepository {

    @PersistenceContext
    EntityManager em;

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

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

test

jpabook.jpashop.MemberRepositoryTest

package jpabook.jpashop;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.annotation.Rollback;
import org.springframework.transaction.annotation.Transactional;

import static org.assertj.core.api.Assertions.assertThat;
public class MemberRepositoryTest {
    @Autowired
    MemberRepository memberRepository;


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

        Long saveId = memberRepository.save(member);
        Member findMember = memberRepository.find(saveId);

        assertThat(findMember.getId()).isEqualTo(member.getId());
        assertThat(findMember.getUsername()).isEqualTo(member.getUsername());

    }
}

application.yml

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 

build.gradle

plugins {
	id 'java'
	id 'org.springframework.boot' version '3.2.1'
	id 'io.spring.dependency-management' version '1.1.4'
}

group = 'jpabook'
version = '0.0.1-SNAPSHOT'

java {
	sourceCompatibility = '17'
}

configurations {
	compileOnly {
		extendsFrom annotationProcessor
	}
}

repositories {
	mavenCentral()
}

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
	implementation 'org.springframework.boot:spring-boot-starter-validation'
	implementation 'org.springframework.boot:spring-boot-starter-web'
	implementation 'org.springframework.boot:spring-boot-devtools'
	compileOnly 'org.projectlombok:lombok'
	runtimeOnly 'com.h2database:h2'
	annotationProcessor 'org.projectlombok:lombok'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

tasks.named('test') {
	useJUnitPlatform()
}

build, run 모두 intellj IDE로 하는중입니다.