test_my_do_mathematics_simple.py

#A simple test class to test the DoMathematics class
class Test_do_maths_simple(unittest.TestCase):
   
    def setUp(self):
        self.do_maths = Do_Mathematics(10, 20)

    def tearDown(self):
        del self.do_maths

    def test_sum(self):
        result = self.do_maths.sum()
        self.assertEqual(result, 30, "Sum method is incorrect")
   
    def test_sub(self):
        result = self.do_maths.sub()
        self.assertEqual(result, -10, "Sub method is incorrect")