Question

我尝试为@Transactional创建测试用例。

@ContextConfiguration(locations = {"classpath:/META-INF/spring/app-context.xml" })
@RunWith(SpringJUnit4ClassRunner.class)
public class TransactionalAnnotationTest {
    public static final BigDecimal PROD_ID = new BigDecimal(1234);

    @PersistenceContext
    HibernateEntityManager em;


    @Test
    public final void testTransactionIsolation() {
        String original = em.find(ProductImpl.class, PROD_ID).getDescription();
        // original = "Foo"
        updateTx(original);
    }

    @Transactional
    public final void updateTx(String original) {
        ProductImpl product = em.find(ProductImpl.class, PROD_ID);
        product.setDescription("Bar");
        whatIsInDB(original);
    }

    private void whatIsInDB(String original) {
        String sameTxDescription = em.find(ProductImpl.class, PROD_ID).getDescription();
        assert !sameTxDescription.equals(original);
    }
}

失败了！第二个em.find是否应该返回带有“Bar”的产品？

Answer 1

在设置“description”字段

后尝试显式刷新上下文



product.setDescription("Bar");
em.flush();
whatIsInDB(original);

product.setDescription("Bar"); em.flush(); whatIsInDB(original);

Answer 2

嗯，我让它上班了。

要测试交易：我需要一个简单的em.flush()（感谢@TaoufikMohdit的想法）。如果没有交易，flush()会抛出TransactionRequiredException！

@Transactional仅适用于Spring-Managed-Beans。所以我创建了一个服务：

@Service
public class BasicTransactionalService {
  @PersistenceContext
  HibernateEntityManager em;

  @Transactional
  public void testFlushInTransactional() {
    em.flush();
  }

  @Deprecated
  public void testFlushOutsideTransactional() {
    em.flush();
  }

  @Transactional
  public void testFlushSubroutineTransactional() {
    testFlushOutsideTransactional();
  }
}

我将测试更改为：

@Autowired
BasicTransactionalService bean;

@Test
public void testTransactionIsolation() {
  bean.testFlushInTransactional();
}

@Test(expected = TransactionRequiredException.class)
@SuppressWarnings("deprecation")
public void testThrowsTransactionRequiredException() {
  bean.testFlushOutsideTransactional();
}

@Test
public void testTransactionalSubroutine(){
  bean.testFlushSubroutineTransactional();
}

现在工作正常。

BTW这是我的app-config.xml

<beans>
  <bean class="BasicTransactionalService" />
  <bean class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean" />
  <bean class="org.springframework.orm.jpa.JpaTransactionManager" />
  <tx:annotation-driven />
<beans>

@Transactional测试失败

2 个答案: