开发Spring MVC应用程序(4-4) （完）

（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());

    }

}

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