1.
# სერვლეტის Exception-ზე არ იტესტება, რადგან exception უბრალოდ იბეჭდება
# სწორად არ ხდება manager-ის ინექცია request-ში
@WebListener()
public class ContextListener implements ServletContextListener {

    // Public constructor is required by servlet spec
    public ContextListener() {
    }

    // -------------------------------------------------------
    // ServletContextListener implementation
    // -------------------------------------------------------
    public void contextInitialized(ServletContextEvent sce) {
        /* This method is called when the servlet context is
           initialized(when the Web application is deployed).
           You can initialize servlet context related data here.
        */
        ServletContext sc = sce.getServletContext();

        try {
            UserDao userDao = new UserDao;
            DataManager dataManager = new DataManager("com.mysql.jdbc.Driver", userDao);
            sc.setAttribute("DataManager", dataManager);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }

    }
}

@WebServlet(name = "SignUpServlet", value = {"/signup"})
public class SignUp extends HttpServlet {
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        String userName = request.getParameter("username");
        String password = request.getParameter("password");

        try {
            DataManager dataManager = (dataManager)  request.getServletContext().getAttribute("DataManager");
            String result = dataManager.register(userName, password);

            response.getWriter().write(result);

        } catch (Exception e) {
            System.out.println("Exception is: " + e);
        }
    }
}

public class DataManager {
        private UserDao dao;

        public DataManager(String driver, UserDao dao) throws ClassNotFoundException {
            Class.forName(driver);
            this.dao = dao;
        }

        public String register(String userName, String password) {
            boolean success = false;

            try {
                success = dao.register(username, password);
            } catch (Exception e) {
                e.printStackTrace();
            }

            if (success) {
                return "OK";
            } else {
                return "ERROR";
            }
        }
}



public class MyApplicationTest {

    @Test
    public void testServlet1() {
        HttpServletRequest request = mock(HttpServletRequest.class);
        HttpServletResponse response = mock(HttpServletResponse.class);

        when(request.getServletContext().getAttribute("DataManager")).then(null);
        SignUp servlet = new SignUp();

        servlet.doPost(request, response);

        // es amoagdebs Exceptions 64 xazze amito gadava catch shi da 69 xazs gaivlis

    }

    @Test
    public void testServlet2() {
        HttpServletRequest request = mock(HttpServletRequest.class);
        when(request.getParameter("username")).then("");
        when(request.getParameter("password")).then("");

        HttpServletResponse response = mock(HttpServletResponse.class);
        DataManager dataManager = mock(DataManager.class);
        when(dataManager.register("", "")).then(true);

        SignUp servlet = new SignUp();
        servlet.doPost(request, response);

        // es 62 xazze try shi sheva result shi true chaewereba da responsic dabrundeba

    }


    // zeda orma testma servleti srulad dafara axla DataManager

     @Test
    public void testDao1() {

        DataManager dataManager = new DataManager("com.mysql.jdbc.Driver", null);
        dataManager.register("", "");

        // es amoagdebs Exception 61 xazze


    }

    @Test
    public void testDao2() {
        UserDao userDao = mock(UserDao.class);
        when(userDao.register("", "")).then(true);
        DataManager dataManager = new DataManager("com.mysql.jdbc.Driver", userDao);
        dataManager.register("", "");

        // es sheva 67 xazze

    }

    @Test
    public void testDao3() {
        UserDao userDao = mock(UserDao.class);
        when(userDao.register("", "")).then(false);
        DataManager dataManager = new DataManager("com.mysql.jdbc.Driver", userDao);
        dataManager.register("", "");

        // es sheva 69 xazze

    }

}