持续集成之路??数据访问层单元测试遇到的问题

作者：网络转载发布时间：[ 2013/7/24 15:10:31 ] 推荐标签：

　　绿色是真正发挥作用的代码。

　　可是这个类并不能直接饮用，而是通过TransactionDbUnitTestExecutionListener的CHAIN被调用的，而TransactionDbUnitTestExecutionListener同样无法更改，同样只能建一个自定义的TransactionDbUnitTestExecutionListener类，CustomTransactionDbUnitTestExecutionListener：

public class CustomTransactionDbUnitTestExecutionListener extends TestExecutionListenerChain {

private static final Class<?>[] CHAIN = { TransactionalTestExecutionListener.class，
CustomDbUnitTestExecutionListener.class };

    @Override
    protected Class<?>[] getChain() {
        return CHAIN;
    }
}

　　那么测试类的注解也要修改：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext-test.xml")
@TestExecutionListeners({
        DependencyInjectionTestExecutionListener.class，
        DirtiesContextTestExecutionListener.class，
        CustomTransactionDbUnitTestExecutionListener.class，
        ForeignKeyDisabling.class})

　　四、@Transactional标签引起的问题

　　按照spring-dbunit-test的文档中说法，可以使用@Transactional确保数据的清洁。使用简单，只需要将上面的注解增加一个@Transactional，

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext-test.xml")
@Transactional
@TestExecutionListeners({
        DependencyInjectionTestExecutionListener.class，
        DirtiesContextTestExecutionListener.class，
        CustomTransactionDbUnitTestExecutionListener.class，
        ForeignKeyDisabling.class})

　　可是运行时，却出现了异常：

org.springframework.transaction.TransactionSystemException: Could not roll back JPA transaction; nested exception is javax.persistence.PersistenceException: unexpected error when rollbacking

at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:544)

at org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:846)

at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:823)

at org.springframework.test.context.transaction.TransactionalTestExecutionListener$TransactionContext.endTransaction(TransactionalTestExecutionListener.java:588)

at org.springframework.test.context.transaction.TransactionalTestExecutionListener.endTransaction(TransactionalTestExecutionListener.java:297)

at org.springframework.test.context.transaction.TransactionalTestExecutionListener.afterTestMethod(TransactionalTestExecutionListener.java:192)

……

Caused by: javax.persistence.PersistenceException: unexpected error when rollbacking

at org.hibernate.ejb.TransactionImpl.rollback(TransactionImpl.java:109)

at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:540)

... 32 more

Caused by: org.hibernate.TransactionException: rollback failed

at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:215)

at org.hibernate.ejb.TransactionImpl.rollback(TransactionImpl.java:106)

... 33 more

Caused by: org.hibernate.TransactionException: unable to rollback against JDBC connection