assertEquals("{labels.system_error_title}", FessLabels.LABELS_system_error_title);
        assertEquals("{labels.contact_site_admin}", FessLabels.LABELS_contact_site_admin);
        assertEquals("{labels.request_error_title}", FessLabels.LABELS_request_error_title);
        assertEquals("{labels.bad_request}", FessLabels.LABELS_bad_request);
        assertEquals("{labels.page_not_found_title}", FessLabels.LABELS_page_not_found_title);