DropDownPopupInspector popup = dropDownField.popup();
popup.itemsTable().assertVisible(false);
dropDownField.field().keyPress('i');
OpenFacesAjaxLoadingMode.getInstance().waitForLoad();
popup.itemsTable().assertVisible(true);
popup.items().get(0).assertText("Iberis");
dropDownField.field().keyPress('r');
OpenFacesAjaxLoadingMode.getInstance().waitForLoad();
popup.items().get(0).assertText("Iresine");
popup.items().get(1).assertText("Iris");