（26）修正破坏的测试程序
l 在修改ProductManager类后，原来的TestProductManager需要作相应的修改来测试DAO的使用
l 首先创建模拟数据库持久的DAO实现MockProductManagerDaoImpl类
package tests;
import bus.Product;
import java.util.List;
import db.ProductManagerDao;
public class MockProductManagerDaoImpl implements ProductManagerDao {
private List products;
public void setProducts(List p) {
products = p;
}
public List getProductList() {
return products;
}
public void increasePrice(Product prod, int pct) {
double newPrice = prod.getPrice().doubleValue() * (100 + pct)/100;
prod.setPrice(new Double(newPrice));
}
}
l 修改tests/WEB-INFspringapp-xml，定义ProductManagerDao接口的引用，模拟数据采用原来Bean配置中定义的数据
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<!--
- Application context definition for "springapp" DispatcherServlet.
-->
<beans>
<bean id="springappController" class="web.SpringappController">
<property name="productManager">
<ref bean="prodMan"/>
</property>
</bean>
<bean id="prodManDao" class="tests.MockProductManagerDaoImpl">
<property name="products">
<list>
<ref bean="product1"/>
<ref bean="product2"/>
<ref bean="product3"/>
</list>
</property>
</bean>
<bean id="prodMan" class="bus.ProductManager">
<property name="productManagerDao">
<ref bean="prodManDao"/>
</property>
<!--
<property name="products">
<list>
<ref bean="product1"/>
<ref bean="product2"/>
<ref bean="product3"/>
</list>
</property>
-->
</bean>
<bean id="product1" class="bus.Product">
<property name="description"><value>Lamp</value></property>
<property name="price"><value>5.75</value></property>
</bean>
<bean id="product2" class="bus.Product">
<property name="description"><value>Table</value></property>
<property name="price"><value>75.25</value></property>
</bean>
<bean id="product3" class="bus.Product">
<property name="description"><value>Chair</value></property>
<property name="price"><value>22.79</value></property>
</bean>
</beans>
l 最后修改TestProductManager，在setUp()方法中使用DAO
package tests;
import java.util.List;
import java.util.ArrayList;
import junit.framework.TestCase;
import bus.ProductManager;
import bus.Product;
public class TestProductManager extends TestCase {
private ProductManager pm;
public void setUp() {
pm = new ProductManager();
Product p = new Product();
p.setDescription("Chair");
p.setPrice(new Double("20.50"));
ArrayList al = new ArrayList();
al.add(p);
p = new Product();
p.setDescription("Table");
p.setPrice(new Double("150.10"));
al.add(p);
//pm.setProducts(al);
MockProductManagerDaoImpl pmdao = new MockProductManagerDaoImpl();
pmdao.setProducts(al);
pm.setProductManagerDao(pmdao);
pm.getProducts();
}
public void testGetProducs() {
List l = pm.getProducts();
Product p1 = (Product) l.get(0);
assertEquals("Chair", p1.getDescription());
Product p2 = (Product) l.get(1);
assertEquals("Table", p2.getDescription());
}
public void testIncreasePrice() {
pm.increasePrice(10);
List l = pm.getProducts();
Product p = (Product) l.get(0);
assertEquals(new Double("22.55"), p.getPrice());
p = (Product) l.get(1);
assertEquals(new Double("165.11"), p.getPrice());
}
}