Isolierung von Repository-Persistenz-Slices mit TestEntityManager

@DataJpaTest
@AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.NONE)
class OrderRepositoryTest {
 
    @Autowired
    private TestEntityManager entityManager;
 
    @Autowired
    private OrderRepository orderRepository;
 
    @Test
    void shouldFindActiveOrdersByCustomerCode() {
        Customer customer = entityManager.persistFlushFind(new Customer("CUST_100"));
        Order order = new Order("ORD_99", OrderStatus.ACTIVE, customer);
        entityManager.persistAndFlush(order);
        entityManager.clear();
 
        List<Order> activeOrders = orderRepository.findByCustomerCodeAndStatus("CUST_100", OrderStatus.ACTIVE);
 
        assertThat(activeOrders).hasSize(1);
        assertThat(activeOrders.get(0).getOrderNumber()).isEqualTo("ORD_99");
    }
}