通过Spring2.5对单元测试的Annotation支持进行TDD开发

本文从一个例子出发，根据TDD（测试驱动开发）要求，进行开发。只是用于演示如何使用Spring2.5提供的基于Annonation方式的IOC实现，进行TDD开发。

    首先我们来看一下这个例子的要求：开发一个购物车对象，可以添加商品，删除商品，查询已购商口，结账功能。

    第一步，先来完成添加商品功能，下面就按TDD开发要求，先编写单元测试：

    下面是增对该功能，编写的测试代码

/**
  * @author xmatthew
  *
  */
  @RunWith(SpringJUnit4ClassRunner.class)
  @ContextConfiguration(locations = {"classpath:/applicationContext.xml"})
  @TestExecutionListeners({DependencyInjectionTestExecutionListener.class})
  public class CartTest {
  
     @Autowired
     private SuperStore superStore;
     
     @Test
     public void addCommodity() {
 
         Cart cart = new Cart();
         Commodity commodity = superStore.getCommodity("1"/*电脑桌*/);
         cart.addCommodity(commodity);
         
         Assert.assertEquals(1, cart.size());
         Assert.assertTrue(cart.contains(commodity));
         
     }
 }

    当然这个单元测试不能通过（无法编译）。接下来就是编写代码，让单元测试能顺利通过添加 applicationContext.xml文件

<?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-2.5.xsd">
 
  
     <context:component-scan base-package="com.xmatthew.spring.tdd"/>
     <context:annotation-config/>
 
  
 </beans>

    Commodity.java

/**
  * @author xmatthew
  *
  */
 public class Commodity {
 
     private String id;
     private String name;
     private BigDecimal price;
     
     /* (non-Javadoc)
      * @see java.lang.Object#equals(java.lang.Object)
      */
     @Override
     public boolean equals(final Object other) {
         if (!(other instanceof Commodity))
             return false;
         Commodity castOther = (Commodity) other;
         return new EqualsBuilder().append(id, castOther.id).append(name,
                 castOther.name).append(price, castOther.price).isEquals();
     }
 
     /* (non-Javadoc)
      * @see java.lang.Object#hashCode()
      */
     @Override
     public int hashCode() {
         return new HashCodeBuilder().append(id).append(name).append(price)
                 .toHashCode();
     }
 
     public Commodity(String id, String name, BigDecimal price) {
         super();
         this.id = id;
         this.name = name;
         this.price = price;
     }
 
     public String getId() {
         return id;
     }
 
     public void setId(String id) {
         this.id = id;
     }
 
     public String getName() {
         return name;
     }
 
     public void setName(String name) {
         this.name = name;
     }
 
     public BigDecimal getPrice() {
         return price;
     }
 
     public void setPrice(BigDecimal price) {
         this.price = price;
     }
     
     
 }

    SuperStore.java

/**
  * @author xmatthew
  *
  */
 public interface SuperStore {
 
     
     Commodity getCommodity(String id);
 }