update setup.py

import unittest

import os

from csst_ifs_sim import csst_ifs_sim

import subprocess

class TestDemoFunction(unittest.TestCase):

    def test_ifs_sim_1(self):

        d=1

        csst_ifs_sim(dir_path)

        subprocess.run('csst_ifs_sim', dir_path)

        #csst_ifs_sim dir_path

        self.assertEqual(

            d , 1,