* This method appends the new sort to existing default sorts.
     *
     * @param fieldName the field name to sort by
     * @param order the sort order ("ASC" or "DESC")
     */
    public void addDefaultSort(final String fieldName, final String order) {
        final List<SortBuilder<?>> list = new ArrayList<>();
        if (defaultSortBuilders != null) {

        queryHelper.addDefaultSort("timestamp", "DESC");
        queryHelper.addDefaultSort("title", "ASC");

        QueryContext context = buildQuery("test");
        assertEquals(2, context.sortBuilders().size());
    }

    @Test
    public void test_addDefaultSort_scoreField() {
        queryHelper.addDefaultSort("_score", "DESC");