Java 如果执行@BeForeEach#repository.save()，则测试中的UnitTest最终UUID会发生更改

我在试图通过UUID获得有效订单的位置有一个OrderRepositoryTest个代码

OrderRepositoryTest个

@DataJpaTest
@ExtendWith(SpringExtension.class)
@AutoConfigureTestDatabase(connection = EmbeddedDatabaseConnection.H2)
public class OrderRepositoryTest {

    private static final Logger logger = LoggerFactory.getLogger(OrderRepositoryTest.class);

    @Autowired
    OrderRepository orderRepository;

    private static final UUID id2;

    Order order2 = setOrder2();

    static {
        id2 = UUID.randomUUID();
    }

    @BeforeEach
    public void setUp() {
        orderRepository.save(order2);
    }

    @AfterEach
    public void tearDown() {
        orderRepository.deleteAll();
    }

    @Test
    public void OrderRepositoryTest_getValidOrder() {

        Assertions.assertThat(id2).isEqualTo(order2.getUuid());

        // TODO unit test get valid order using orderRepository.findOrderByUuid()
    }

    public Order setOrder2() {

        return Order
                .builder()
                .uuid(id2)
                .build();
    }

}

Order个

@Getter
@Setter
@Builder
@ToString
@Jacksonized
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(name = "orders")
public class Order {

    @Valid

    @Id
    @GeneratedValue(strategy = GenerationType.UUID)
    UUID uuid;

    // TODO other columns
}

OrderRepository个

public interface OrderRepository extends JpaRepository<Order, UUID> {
    Optional<Order> findOrderByUuid(UUID uuid);
}

我会得到错误:Expected [correct_uuid] but was [wrong_uuid].但是，如果我注释orderRepository.save(order2);和orderRepository.deleteAll();，两个uuid都匹配，测试将通过.

我的预期结果应该是即使我运行.save()和.Delete()方法，因为UUID id2是一个最终变量，它应该总是相同的.

一百:

我最初try 将id2赋值为:private static final UUID id2 = UUID.randomUUID();，但也失败了.

Note2:

我可以做到以下几点:

@Test
public void OrderRepositoryTest_getValidOrder() {

    UUID order2UUid = order2.getUuid();

    // TODO orderRepository.findOrderByUuid(order2UUid)
}

这将通过测试，但我觉得我应该能够使用最初分配的UUID，因此我没有这样做.