// first set up the PageContext and the bean
    PageContext pc = createPageContext();
    TestBean tb = new TestBean();
    DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
    ServletRequestDataBinder binder = new ServletRequestDataBinder(tb, "tb");
    CustomDateEditor l = new CustomDateEditor(df, true);
    binder.registerCustomEditor(Date.class, l);
    pc.getRequest().setAttribute(BindingResult.MODEL_KEY_PREFIX + "tb", binder.getBindingResult());
    // try another time, this time using Strings
    BindTag bind = new BindTag();