example of testing super calls

family.py

x = None

class Parent:
    def foo(self):
        return 'parent'

class Child(Parent):
    def foo(self):
        if x:
            return x
        else:
            return super().foo()

test_family.py

import unittest
from unittest.mock import patch

from family import Child

class Tester(unittest.TestCase):

    @patch('family.x', False)
    @patch('family.Parent.foo')
    def test_calls_super_if_not_x(self, mock_parent_foo):
        c = Child()
        r = c.foo()
        self.assertEqual(r, mock_parent_foo.return_value)


    @patch('family.x', 3)
    @patch('family.Parent.foo')
    def test_returns_x_if_x_truthy(self, mock_parent_foo):
        c = Child()
        r = c.foo()
        self.assertEqual(r, 3)
        self.assertFalse(mock_parent_foo.called)



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