Example code for article about unit tests - ExampleTest

python_unittest_example.py

import unittest

class ExampleTests(unittest.TestCase):
    
    def test_add(self):
        expectation = 4
        actual = 2 + 2
        self.assertEqual(
            expectation,
            actual,
            msg = "The sum of 2 + 2 should be {} but is {}".format(expectation, actual)
        )

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

Link to article: https://medium.com/@HeyDaveTheDev/writing-unit-tests-in-python-d61531d2c3f0