AbstractFilter implements Filter { protected void doForward( HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws Exception { chain.doFilter(request, response); }  FilterConfig getFilterConfig(); ServletContext getServletContext(); @Override final void init(FilterConfig config); @Override final void destroy(); @Override final void doFilter(
            ServletRequest request,
            ServletResponse response,
            FilterChain chain); static final String DISABLE_FILTER_SETTING_PREFIX; }
@Test public void doForward() throws IOException, ServletException { when(request.getAttribute(RequestDispatcher.FORWARD_CONTEXT_PATH)).thenReturn(""); verifyDoFilter(createNoOverridesFilter()); }