写了个Servlet的测试用例，初学单元测试.
用的JUnit是4.1版，easymock-3.1。
 
// 简单的servlet程序
 public class servletDo extends HttpServlet {
 
     
    public void doGet(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {
      
       doPost( request,  response);
        
    }
 
     
    public void doPost(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {
 
        String name = request.getParameter( "username" );
        String password = request.getParameter( "password" );
        System. out .println( "username" +name);
        System. out .println( "password=" +password);
    }
 
     
    public void init() throws ServletException {
       // Put your code here
    }
 
}
 
//测试程序
 
public class servletDoTest {
 
         private servletDo servlet;
         private HttpServletRequest mockRequest;
        private HttpServletResponse mockResponse;
        
        @Before
         public void setUp(){
                   servlet = new servletDo();
                  
                   mockRequest = createMock(HttpServletRequest.class);                          //加载
                   mockResponse = createMock(HttpServletResponse.class);
         }
        
         @After
         public void tearDown(){
                   verify(mockRequest);                //验证
                   verify(mockResponse);
         }
        
 
       
         @Test
         public void testDoPostHttpServletRequestHttpServletResponse() {
 
                   mockRequest.getParameter("username");                     
                   expectLastCall().andReturn("allen");//传入参数
                  
                   mockRequest.getParameter("password");            
                   expectLastCall().andReturn("12345");//传入参数
 
                  
                   replay(mockRequest);                                           //回放
                   replay(mockResponse);
                  
                   try {
                            servlet.doPost(mockRequest, mockResponse);
                   } catch (ServletException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                   } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                   }       
 
                   //调用
                   assertTrue(true);
                  
         }
 
}