Spring MVC学习-----------对Action做JUnit单元测试

如何给spring3 MVC中的Action做JUnit单元测试？

 使用了spring3 MVC后，给action做单元测试变得很方便，我以前从来不给action写单元测试的，现在可以根据情况写一些了。

 不用给每个Action都写单元测试吧，自己把握吧。

 

 JUnitActionBase类是所有JUnit的测试类的父类

 package test;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.junit.BeforeClass;
 import org.springframework.mock.web.MockServletContext;
 import org.springframework.web.context.WebApplicationContext;
 import org.springframework.web.context.support.XmlWebApplicationContext;
 import org.springframework.web.servlet.HandlerAdapter;
 import org.springframework.web.servlet.HandlerExecutionChain;
 import org.springframework.web.servlet.HandlerMapping;
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter;
 import org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping;
 /**
 * 说明： JUnit测试action时使用的基类
 *
 * @author  赵磊
 * @version 创建时间：2011-2-2 下午10:27:03
 */
 public class JUnitActionBase {
     private static HandlerMapping handlerMapping;
     private static HandlerAdapter handlerAdapter;
     /**
      * 读取spring3 MVC配置文件
      */
     @BeforeClass
  public static void setUp() {
         if (handlerMapping == null) {
             String[] configs = { "file:src/springConfig/springMVC.xml" };
             XmlWebApplicationContext context = new XmlWebApplicationContext();
             context.setConfigLocations(configs);
             MockServletContext msc = new MockServletContext();
             context.setServletContext(msc);         context.refresh();
             msc.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, context);
             handlerMapping = (HandlerMapping) context
                     .getBean(DefaultAnnotationHandlerMapping.class);
             handlerAdapter = (HandlerAdapter) context.getBean(context.getBeanNamesForType(AnnotationMethodHandlerAdapter.class)[0]);
         }
     }

     /**
      * 执行request对象请求的action
      *
      * @param request
      * @param response
      * @return
      * @throws Exception
      */
     public ModelAndView excuteAction(HttpServletRequest request, HttpServletResponse response)
  throws Exception {
         HandlerExecutionChain chain = handlerMapping.getHandler(request);
         final ModelAndView model = handlerAdapter.handle(request, response,
                 chain.getHandler());
         return model;
     }
 }

 

 

这是个JUnit测试类，我们可以new Request对象，来参与测试，太方便了。给request指定访问的URL，就可以请求目标Action了。

 

 package test.com.app.user;
 import org.junit.Assert;
 import org.junit.Test;
 import org.springframework.mock.web.MockHttpServletRequest;
 import org.springframework.mock.web.MockHttpServletResponse;
 import org.springframework.web.servlet.ModelAndView;

 import test.JUnitActionBase;

 /**
 * 说明： 测试OrderAction的例子
 *
 * @author  赵磊
 * @version 创建时间：2011-2-2 下午10:26:55
 */

 public class TestOrderAction extends JUnitActionBase {
     @Test
     public void testAdd() throws Exception {
     MockHttpServletRequest request = new MockHttpServletRequest();
         MockHttpServletResponse response = new MockHttpServletResponse();
         request.setServletPath("/order/add");
         request.addParameter("id", "1002");
         request.addParameter("date", "2010-12-30");
         request.setMethod("POST");
         // 执行URI对应的action
         final ModelAndView mav = this.excuteAction(request, response);
         // Assert logic
         Assert.assertEquals("order/add", mav.getViewName());
         String msg=(String)request.getAttribute("msg");
         System.out.println(msg);
     }
 }

 需要说明一下 ：由于当前最想版本的Spring(Test) 3.0.5还不支持@ContextConfiguration的注解式context file注入，所以还需要写个setUp处理下，否则类似于Tiles的加载过程会有错误，因为没有ServletContext。3.1的版本应该有更好的解决方案，

参见： https://jira.springsource.org/browse/SPR-5243 。

参考 ：http://www.iteye.com/topic/828513