（20）为SpringappController增加单元测试
l SpringappController依赖于HttpServletRequest、HttpServletResponse以及应用程序context
l 控制器没有使用request和response，所以将它们简单的设成null
l 应用程序context可以在Web容器外加载，这里使用FileSystemXmlApplicationContext
package tests;
import java.util.Map;
import java.util.List;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import junit.framework.TestCase;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.web.servlet.ModelAndView;
import web.SpringappController;
import bus.Product;
public class TestSpringappController extends TestCase {
private ApplicationContext ac;
public void setUp() throws IOException {
ac = new FileSystemXmlApplicationContext("src/tests/WEB-INF/springapp-servlet.xml");
}
public void testHandleRequest() throws ServletException, IOException {
SpringappController sc = (SpringappController) ac.getBean("springappController");
ModelAndView mav = sc.handleRequest((HttpServletRequest) null, (HttpServletResponse) null);
Map m = mav.getModel();
List pl = (List) ((Map) m.get("model")).get("products");
Product p1 = (Product) pl.get(0);
assertEquals("Lamp", p1.getDescription());
Product p2 = (Product) pl.get(1);
assertEquals("Table", p2.getDescription());
Product p3 = (Product) pl.get(2);
assertEquals("Chair", p3.getDescription());
}
}
l 这里只是测试handleRequest方法，检查Model中返回的数据
l 在setUp方法中加载应用程序context；将springapp/WEB-INF/springapp-servlet.xml拷贝到src/tests//WEB-INF目录下，去掉messageSource、urlMapping、viewResolver条目
l （译者：Eclipse包含了JUnit，所以很容易在Eclipse进行单元测试）
（21）增加单元测试和新功能到ProductManager
l 在ProductManager中增加了增长价格的方法increasePrice()
package bus;
import java.io.Serializable;
import java.util.ListIterator;
import java.util.List;
public class ProductManager implements Serializable {
private List products;
public void setProducts(List p) {
products = p;
}
public List getProducts() {
return products;
}
public void increasePrice(int pct) {
ListIterator li = products.listIterator();
while (li.hasNext()) {
Product p = (Product) li.next();
double newPrice = p.getPrice().doubleValue() * (100 + pct)/100;
p.setPrice(new Double(newPrice));
}
}
}
l 这个Test Case是测试getProducts和increasePrice方法，在setUp()方法中初始化一些产品信息
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);
}
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());
}
}