public  void doTest(String jspName) throws Exception 
{
        WebRequest request = new GetMethodWebRequest(jspName);
        WebResponse response = runner.getResponse(request);
        if (log.isDebugEnabled())
        {
            log.debug(response.getText());
        }
        WebTable[] tables = response.getTables();
        assertEquals("Wrong number of tables.", 1, tables.length);
        WebLink[] links = response.getLinks();
        assertEquals("Wrong number of links.", 3, links.length);
        ParamEncoder encoder = new ParamEncoder("table");
        String orderParameter = encoder.encodeParameterName(TableTagParameters.PARAMETER_ORDER);
        assertEquals("wrong sorting order", Integer.toString(SortOrderEnum.DESCENDING.getCode()), links[0]
            .getParameterValues(orderParameter)[0]);
        assertEquals("wrong sorting order", Integer.toString(SortOrderEnum.ASCENDING.getCode()), links[1]
            .getParameterValues(orderParameter)[0]);
        assertEquals("wrong sorting order", Integer.toString(SortOrderEnum.ASCENDING.getCode()), links[2]
            .getParameterValues(orderParameter)[0]);
}

No exception when an invalid page is requested.

 public String getJspName() 
{
        return "DISPL-208.jsp";
}