我在外部包中有@Entity类，该类也具有静态元模型。在应用程序的服务类中，我正在使用这些元模型和EntityManager / CriteriaBuilder / CriteriaQuery来检索我的数据。运行该应用程序时，这可以正常工作。但是，在运行单元测试时，我的元模型及其属性始终为null。
代码...
package com.example.core.entities;
@Entity
@Table(schema = "lookup", name="BookingSystem")
public class BookingSystem implements ILookupEntity, IAuditEntity, Serializable {
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "id")
public Integer id;
@Column(name = "name")
public String name;
@Column(name = "code")
public Integer code;
}
package com.example.core.entities;
@Generated(value = "org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor")
@StaticMetamodel(BookingSystem.class)
public abstract class BookingSystem_ {
public static volatile SingularAttribute<BookingSystem, Integer> id;
public static volatile SingularAttribute<BookingSystem, Integer> code;
public static volatile SingularAttribute<BookingSystem, String> name;
}
在我的应用的服务类别中的使用...
package com.example.bookingsystem;
@Service
public class BookingService {
@PersistenceContext
private EntityManager entityManager;
public void saveBooking(Booking booking) {
//...
RepositoryQueryBuilder<BookingSystem> bookingSystemSelector = new RepositoryQueryBuilder<>(entityManager, BookingSystem.class);
List<BookingSystem> bookingSystems = bookingSystemSelector
.and(BookingSystem_.code, booking.bookingSystem.code) //<-- Here "BookingSystem_.code" is null.
.getResultList();
//...
}
}
“ RepositoryQueryBuilder”类只是一个实用程序构建器类，它包装EntityManager，CriteriaBuilder等。基本上在此示例之后进行建模...JPA Criteria Predicate Conditions
单元测试代码...
package com.example.bookingsystem;
public abstract class BaseTestSetup {
@InjectMocks
protected BookingService bookingService;
protected EntityManager entityManager = PowerMockito.mock(EntityManager.class);
protected CriteriaBuilder criteriaBuilder = PowerMockito.mock(CriteriaBuilder.class);
protected CriteriaQuery<BookingSystem> criteriaQuery = PowerMockito.mock(CriteriaQuery.class);
protected Root<BookingSystem> root = PowerMockito.mock(Root.class);
protected void arrange() {
when(entityManager.getCriteriaBuilder()).thenReturn(criteriaBuilder);
when(criteriaBuilder.createQuery(BookingSystem.class)).thenReturn(criteriaQuery);
when(criteriaQuery.from(Matchers.<Class<BookingSystem>>any())).thenReturn(root);
when(criteriaQuery.from(Matchers.<EntityType<BookingSystem>>any())).thenReturn(root);
}
}
@RunWith(PowerMockRunner.class)
public class BookingServiceTest extends BaseTestSetup {
@BeforeClass
@Override
public void arrange() {
super.arrange();
//...
}
@Test
public void doIt() {
Booking booking = new Booking();
booking.id = 12345;
booking.bookingSystem = new BookingSystem();
booking.bookingSystem.id = 1;
booking.bookingSystem.code = 106000;
bookingService.saveBooking(booking);
}
}
我已经看过这个JPA/Hibernate Static Metamodel Attributes not Populated -- NullPointerException，但是解决方案似乎是“确保实体及其元模型在同一包中”，但是正如您所看到的，两者都已经在我的“ com.example中。 core.entities“软件包。
我在我的代码中使用了所有由bean和注释驱动的配置（没有持久性或上下文xml文件）。就测试而言，我正在IntelliJ中使用TestNG和PowerMock。
似乎在单元测试期间好像没有拾取元模型。任何想法。
@Test
public void doIt() {
BookingSystem_.code = new SingularAttributeMock<BookingSystem, Integer>();
bookingService.saveBooking(booking);
}
}
可以定制<SingularAttributeMock，以便在测试中使用它。您还可以使用SingularAttribute类的任何其他实现。
public class SingularAttributeMock<X, Y> implements SingularAttribute<X, Y> { //Overriding methods of SingularAttribute... }
元模型类应与它们所包含的实体类位于同一包中描述;