jpa - 没有可用的事务 EntityManager

Question

我是 jpa 和 spring 世界的新手，我目前正在对一个简单的方法进行一些单元测试，但只有当我在单元测试模式下运行我的测试类时才会继续收到此错误消息:

java.lang.IllegalStateException: No transactional EntityManager available
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:223)
at $Proxy19.unwrap(Unknown Source)
at com.gemstone.integration.PersonDao.getPersonByUserNamePassword(PersonDao.java:59)
at com.gemstone.integration.PersonDaoTest.getPersonByUserNamePassword_Exist(PersonDaoTest.java:37)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:240)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

但是，当我运行我的项目时，代码工作正常，它会正确检索数据(不在单元测试模式下)。

请在我的方法下面找到单元测试将基于的方法:

@PersistenceContext
private EntityManager entityManager;
@SuppressWarnings("unchecked")
public boolean getPersonByUserNamePassword(String firsName, String password) {

    String hql = "from Person p where p.firstName = :firsName and p.password =:password";
    Session mysession = entityManager.unwrap(Session.class);

    Query query = mysession.createQuery(hql);
    query.setParameter("firsName", firsName);
    query.setParameter("password", password);
    List<Person> results = query.list();

    if (results != null && results.size() > 0) {

        return true;
    }
    return false;

}

我的单元测试如下:

@TestExecutionListeners({ DependencyInjectionTestExecutionListener.class })
@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration(locations = { "classpath:/Intcontext.xml" })

public class PersonDaoTest {

    @Autowired
    PersonDao personDao;

    @Transactional
    @Test
    public void getPersonByUserNamePassword_Exist() {

        String firsName = "Andy";
        String password = "123";

        boolean isUserExists = personDao.getPersonByUserNamePassword(firsName,
                password);

        Assert.assertTrue(isUserExists);
    }

}

任何想法为什么我会收到 No transactional EntityManager available 错误？:(

提前致谢。

Answer 1

通过声明

@TestExecutionListeners({ DependencyInjectionTestExecutionListener.class })

您已经完全(尽管是无意地)禁用了对测试管理事务的支持。原因是你省略了 TransactionalTestExecutionListener从声明的监听器列表中。

但是请注意， TransactionalTestExecutionListener默认情况下是透明声明的。因此，当您删除 @TestExecutionListeners 时来自您的测试类的声明， TransactionalTestExecutionListener再次启用。

您当然可以找到详细信息 in the Spring Reference Manual here .

问候，

Sam(Spring TestContext 框架的作者；))