Question

如何使用junit和jmock对MVC Model 2应用程序进行单元测试？

我有一个MVC Model 2应用程序功能齐全但没有单元测试。我正在围绕应用程序实现单元测试。我想单元测试我的控制器servlet方法。控制器servlet调用dao类来执行CRUD操作。示例：向用户显示登录对话框，用户输入userid / pwd并单击“提交”按钮。该请求由控制器的processRequest（）和validateLogin（）方法处理，然后这些方法通过DAO类查询数据库，最后如果登录成功，则返回带有数据的LoginBean。

我的问题是如何对这种代码进行单元测试？

为了更好地理解问题，下面提供了示例代码。

---- ControllerServlet.java ----

public class ControllerServlet extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=windows-1252";

@Override
public void init(ServletConfig config) throws ServletException {
    super.init(config);
}

@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    doGet(request, response);
}

public void processRequest(HttpServletRequest request, HttpServletResponse response, String opcode) throws ServletException, IOException {
    String url = "index.jsp"; //default url
    HttpSession session = request.getSession();
    try {
        if (opcode.equalsIgnoreCase("authenticate")) {
            String firstName = GenericUtils.getParameter(request, "firstName");
            String lastName = GenericUtils.getParameter(request, "lastName");
            List userLst = validateLogin(firstName, lastName, request);
            boolean loginValid = CollectionUtils.isNotEmpty(userLst);
            request.setAttribute("loginValid", String.valueOf(loginValid)); //setting value in request attribute

            //if login is valid set the LoginBean in session
            if (loginValid) {
                LoginBean loginBean = (LoginBean) userLst.get(0);
                session.setAttribute("loginBean", loginBean);
                getAllProducts(request);
                url = "listProducts.jsp";
            } else {
                url = "login.jsp";
            }
        } 
}
catch.....
//some more code here
} 

public List validateLogin(String firstName, String lastName, HttpServletRequest request) throws ServletException, IOException {
    List userLst = new ArrayList();
    if (firstName.length() > 0 && lastName.length() > 0) {
        userLst = MasterDao.checkLoginValid(firstName, lastName);//DAO call goes here
    }
    return userLst;
}

}

我如何对这种东西进行单元测试？我尝试使用junit和jmock创建单元测试，但我不确定如何使用jmock传递请求参数，第二个问题是我在服务器启动时使用JNDI创建数据库连接，因此我的单元测试总是会失败的地方DAO调用已完成，因为单元测试在编译时执行。如何解决这两个问题并对此功能进行单元测试？

Answer 1

我使用Spring Web模拟框架 http://static.springsource.org/spring/docs/current/javadoc-api/org/springframework/mock/web/package-summary.html

import org.agitar.mock.servlet.MockHttpServletRequest;
import org.agitar.mock.servlet.MockHttpServletResponse;
import org.junit.Before;
import org.springframework.mock.web.MockServletConfig;


public class ControllerServletTest {
    private ControllerServlet servlet;
    private MockServletConfig config;
    private MockHttpServletRequest request;
    private MockHttpServletResponse response;

    @Before
    public void setUp()
            throws Exception {
        servlet = new ControllerServlet();
        config = new MockServletConfig();
        servlet.init(config);

        request = new MockHttpServletRequest();
        response = new MockHttpServletResponse();
    }

    @Test
    public void authenticate() throws Exception {
        request.putParameter("firstName", "Joe");
        request.putParameter("lastName", "Schmoe");

        // etc ...

        servlet.processRequest(request, response, "authenticate");

        // etc ...
    }

}

如何使用junit和jmock对MVC Model 2应用程序进行单元测试？

1 个答案: