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 in result.", 1, tables.length);
        assertEquals("Wrong number of rows in result.", 4, tables[0].getRowCount());
        if (log.isDebugEnabled())
        {
            log.debug(response.getText());
        }
        TableRow[] rows = tables[0].getRows();
        assertEquals("Wrong number of rows in result.", 4, rows.length);
        assertEquals("", rows[0].getClassName());
        assertEquals("odd", rows[1].getClassName());
        assertEquals("even", rows[2].getClassName());
        assertEquals("odd highlighted", rows[3].getClassName());
        assertEquals("", rows[0].getID());
        assertEquals("rowid0", rows[1].getID());
        assertEquals("rowid1", rows[2].getID());
        assertEquals("rowid2", rows[3].getID());
}

No exception when an invalid page is requested.

 public String getJspName() 
{
        return "DISPL-192.jsp";
}