public  void doTest(String jspName) throws Exception 
{
        WebRequest request = new GetMethodWebRequest(jspName);
        WebResponse response;
        response = runner.getResponse(request);
        if (log.isDebugEnabled())
        {
            log.debug(response.getText());
        }
        WebTable[] tables = response.getTables();
        assertEquals("Wrong number of tables in result.", 3, tables.length);
        for (int j = 0; j <  tables.length; j++)
        {
            assertEquals("invalid id", "row" + j, tables[j].getID());
        }
        WebLink[] links = response.getLinks();
        assertEquals("Wrong number of links in result.", 3, links.length);
        // click to sort the first table
        response = links[0].click();
        // get the links
        links = response.getLinks();
        assertEquals("Wrong number of links in result.", 3, links.length);
        // and click again to sort in reversed order
        response = links[0].click();
        if (log.isDebugEnabled())
        {
            log.debug(response.getText());
        }
        tables = response.getTables();
        assertEquals("Wrong number of tables in result.", 3, tables.length);
        // first is sorted, other aren't
        assertTrue("First table should be sorted. Wrong class attribute.", //
            StringUtils.contains(tables[0].getTableCell(0, 0).getClassName(), "sorted"));
        assertEquals("Second table should not be sorted. Wrong class attribute.", //
            "sortable",
            tables[1].getTableCell(0, 0).getClassName());
        assertEquals("Third table should not be sorted. Wrong class attribute.", //
            "sortable",
            tables[2].getTableCell(0, 0).getClassName());
        // and just to be sure also check values: sorted table
        for (int j = 1; j <  tables[0].getRowCount(); j++)
        {
            assertEquals("Unexpected value in table cell", Integer.toString(4 - j), tables[0].getCellAsText(j, 0));
        }
        // unsorted tables:
        for (int j = 1; j <  tables[1].getRowCount(); j++)
        {
            assertEquals("Unexpected value in table cell", Integer.toString(j), tables[1].getCellAsText(j, 0));
            assertEquals("Unexpected value in table cell", Integer.toString(j), tables[2].getCellAsText(j, 0));
        }
}

Try to sort generated tables.

 public String getJspName() 
{
        return "DISPL-056.jsp";
}