如何使JPA列仅在JUnit测试期间可插入？

@Configuration
public class TestDataSourceConfig {

    @Bean
    public DataSource testDataSource() {
        // 配置测试数据源，只允许插入测试所需的数据列
        // ...
        return dataSource;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
        LocalContainerEntityManagerFactoryBean entityManagerFactory = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactory.setDataSource(dataSource);
        entityManagerFactory.setPackagesToScan("com.example.entity");
        // 配置其他JPA相关属性
        // ...
        return entityManagerFactory;
    }
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = TestDataSourceConfig.class)
public class JpaTest {

    @PersistenceContext
    private EntityManager entityManager;

    // 测试方法
    @Test
    public void testInsert() {
        // 插入测试数据
        // ...
    }
}