JPA 기반 테스트 코드 작성 팁 - Yun Blog | 기술 블로그 about blog-comment HOT 2 OPEN

@SpringBootTest(properties = ["spring.profiles.active=test"])
@TestInstance(TestInstance.Lifecycle.PER_CLASS)
@TestConstructor(autowireMode = TestConstructor.AutowireMode.ALL)
class SpringTestSupport {

    @Autowired
    private lateinit var entityManager: EntityManager
    
    protected fun <T> save(entity: T): T {
        entityManager.persist(entity)
        flushAndClearPersistentContext()
        return entity
    }

    private fun flushAndClearPersistentContext() {
        entityManager.flush()
        entityManager.clear()
    }
}

@Transactional
internal class BookFindServiceTest(
    private val bookRepository: BookRepository,
    private val bookFindService: BookFindService
) : SpringTestSupport() {

    @Test
    internal fun `findById 존재하는 경우`() {
        //given
        val book = bookRepository.save(
            Book(
                title = "title",
                writer = "writer",
                publisher = "publisher",
                price = BigDecimal.TEN
            )
        )
       // 위 save 자동 롤백
    }
}