// @Test
 public void testRenderChosenPositionUnavailableCallback() {
   HibernateUtil.clearAll();
   System.out.println(" --------- testRenderChosenPositionUnavailableCallback --------- ");
   Helper helper =
       EntityFactory.buildHelper("Meier", "Klaus", "*****@*****.**", HelperState.ACTIVE, 1, 1, 1980)
           .saveOrUpdate();
   System.out.println(HtmlRenderer.renderChosenPositionUnavailableCallback(helper.getId(), null));
 }