想写一个测试类 WhaleFilter 不知道 该如何写

public abstract class WhaleFilterTest {
    protected Servlet servlet;

    protected MockHttpServletRequest request;

    protected MockHttpServletResponse response;

    protected MockHttpSession session;

    protected MockServletContext servletContext;

    protected MockServletConfig servletConfig;

    protected abstract void initServletConfig();

    protected void newreq() {
        request = Mock.servlet.request().setSession(session);
        request.setContextPath("");
        request.setSession(session);
        response = new MockHttpServletResponse();
    }

    @Before
    public void init() throws Throwable {
        servletContext = Mock.servlet.context();
        servletConfig = new MockServletConfig(servletContext, "nutz");
        initServletConfig();
        servlet = new NutServlet();
        servlet.init(servletConfig);

        session = Mock.servlet.session(servletContext);
        newreq();
    }

    @Test
    public void me() {

    }