def test_luhn_checksum(self):
        """
        Tests if a valid checksum is generated
        Example from wiki: https://en.wikipedia.org/wiki/Luhn_algorithm
        """
        check_digit = calculate_luhn("7992739871")
        assert check_digit == 3

        Tests if a valid checksum is generated
        Example from wiki: https://en.wikipedia.org/wiki/Luhn_algorithm
        
tests/utils/test_utils.py