// UUID without dashes should be 32 characters
        assertEquals(32, id.length());
        assertTrue(id.matches("[a-f0-9]{32}"));
    }

    @Test
    public void test_addDefaultSort_singleField() {
        queryHelper.addDefaultSort("timestamp", "DESC");

        QueryContext context = buildQuery("test");
        assertEquals(1, context.sortBuilders().size());