def test_group_by_composed(self):
        table = self.tables.some_table
        expr = (table.c.x + table.c.y).label("lx")
        stmt = (
            select([func.count(table.c.id), expr])
            .group_by(expr)
            .order_by(expr)
        )
        self._assert_result(stmt, [(1, 3), (1, 5), (1, 7)])