def test_order_by_multiple_asc(self):
        s = self.cls("path", {"sortfield": "one,two", "sortdirection": "asc"})
        self.assertEqual(s.order_by, ("one", "two"))
order_by property splits field by comma and returns multiple.
dataset/ETHPy150Open mozilla/moztrap/tests/view/lists/test_sort.py/SortTest.test_order_by_multiple_asc