29.七-27拆分的testsub

from calculator import Count
import unittest


class TestSub(unittest.TestCase):
    def setUp(self):
        print("test case start")
    def tearDown(self):
        print("test case end")
    def test_sub(self):
        j=Count(2,3)
        self.assertEqual(j.sub(),-1)
    def test_sub2(self):
        j=Count(71,46)
        self.assertEqual(j.sub(),25)


if __name__=='__main__':
    unittest.main()