使用spring-mock进行dao集成测试

http://rongsantang.yculblog.com/post.621226.html

使用spring-mock进行dao集成测试
一地鸡毛 @ 2005-03-25 16:19

在进行dao的集成测试时候，数据清理，察看数据都是比较麻烦的事情，使用Spring-mock.jar可以帮助我们简化着一个过程。我举一个简单的例子，说明一下如何使用spring-mock。

首先是po, hbm.xml, dao, daoimpl没什么好说的：

Customer.java :

package rst.spring.mock;

import java.io.Serializable;

/** @author Hibernate CodeGenerator */
public class Customer implements Serializable {

   /** identifier field */
   private Long id;

   /** nullable persistent field */
   private String name;

   /** full constructor */
   public Customer(String name) {
       this.name = name;
   }

   /** default constructor */
   public Customer() {
   }

   public Long getId() {
       return this.id;
   }

   public void setId(Long id) {
       this.id = id;
   }

   public String getName() {
       return this.name;
   }

   public void setName(String name) {
       this.name = name;
   }

}

Customer.hbm.xml :

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
       "-//Hibernate/Hibernate Mapping DTD//EN"
       "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping package="rst.spring.mock">
<class name="Customer" table="customer">
<id name="id" column="id" type="long" unsaved-value="null">
<generator class="identity"/>
</id>
<property name="name" column="name" type="string"/>
</class>

</hibernate-mapping>

CustomerDAO :
/*
* Created on 2005-3-25
*/
package rst.spring.mock;

import org.springframework.dao.DataAccessException;

/**
* @author rst
*
*/
public interface CustomerDAO {
   public void add(Customer customer) throws DataAccessException;
}

CustomerDAOImpl :

package rst.spring.mock;

import org.springframework.dao.DataAccessException;
import org.springframework.orm.hibernate.support.HibernateDaoSupport;

/**
* Class description.
*
* @author rst
*/
public class CustomerDAOHibernateImpl extends HibernateDaoSupport implements CustomerDAO{

   public void add(Customer customer) throws DataAccessException{
       this.getHibernateTemplate().save(customer);
   }
}

然后测试的基类SpringDAOTestCase继承自AbstractTransactionalDataSourceSpringContextTests，目前只有一个指定测试用xml文件位置的逻辑。

package rst.spring.mock;

import org.springframework.test.AbstractTransactionalDataSourceSpringContextTests;

/**
* Class description.
*
* @author rst
*/
public abstract class SpringDAOTestCase extends AbstractTransactionalDataSourceSpringContextTests {

protected String[] getConfigLocations() {
return new String[] { "test.xml" };
}

}

接着是我们真正测试的类CustomerDAOTest.java：

package rst.spring.mock;

/**
* Class description.
*
* @author rst
*/
public class CustomerDaoTest extends SpringDAOTestCase {

   private CustomerDAOHibernateImpl customerDAO;

   protected void onSetUpInTransaction() throws Exception {
       super.onSetUpInTransaction();
       //this.setPopulateProtectedVariables(true);
       customerDAO = (CustomerDAOHibernateImpl) this.applicationContext.getBean("customerDAO");
   }

   protected void onTearDownInTransaction() {
       customerDAO = null;
   }

   public void testInsert() {
       Customer customer = new Customer();
       customer.setName("javaeye");
       customerDAO.add(customer);
       String name = (String) jdbcTemplate.queryForObject("select name from customer where id=?", new Object[]{customer.getId()}, String.class);

       assertEquals(customer.getName(), name);
   }

}

最后看看配置文件test.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">


<beans>





<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location"><value>classpath:jdbc.properties</value></property>
</bean>


<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"><value>${jdbc.driverClassName}</value></property>
<property name="url"><value>${jdbc.url}</value></property>
<property name="username"><value>${jdbc.username}</value></property>
<property name="password"><value>${jdbc.password}</value></property>
</bean>


<bean id="sessionFactory" class="org.springframework.orm.hibernate.LocalSessionFactoryBean">
<property name="dataSource"><ref local="dataSource"/></property>
<property name="mappingResources">
<value>rst/spring/mock/Customer.hbm.xml</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>


<bean id="transactionManager" class="org.springframework.orm.hibernate.HibernateTransactionManager">
<property name="sessionFactory"><ref local="sessionFactory"/></property>
</bean>

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate.HibernateTemplate">
<property name="sessionFactory"><ref local="sessionFactory"/></property>
</bean>

<bean id="customerDAO" class="rst.spring.mock.CustomerDAOHibernateImpl">
<property name="hibernateTemplate"><ref local="hibernateTemplate"/></property>
</bean>
</beans>

这个文件很简单，不要忘记transactionManager的配置，Test类会自动装配的。

运行之后，就可以看到应有的结果，并且数据库中不会有数据污染。这个过程主要是开始一个transaction，然后开始你的test方法，执行dao操作，执行sql查询验证结果，最后无论成功失败rollback transaction。

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使用spring-mock进行dao集成测试

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