Fridge 프로젝트를 열고 수정, 삭제, 전체삭제 기능을 구현한다. 먼저 Repository 테스트 클래스부터 작성한다. @RunWith(SpringRunner.class) @DataJpaTest public class JpaFridgeRepositoryTests { @Autowired JpaFridgeRepository jpaFridgeRepository; @Test public void createFridge() { String nickname = "myFridge"; Fridge fridge = jpaFridgeRepository.save(new Fridge(nickname)); assertThat(fridge).isNotNull(); assertThat(fridge.getNickname()).isEqualTo(nickname); assertThat(fridge.getNickname()).isNotEqualTo("another nickname"); } @Test public void update() { Fridge fridge = jpaFridgeRepository.save(new Fridge("myFridge")); assertThat(jpaFridgeRepository.findOne(fridge.getId())).isNotNull(); Fridge changeNicknameFridge = new Fridge("otherFridge"); changeNicknameFridge.setId(fridge.getId()); jpaFridgeRepository.save(changeNicknameFridge); Fridge sa...