Question

CODE IN PYTHON

17. Use the Design Recipe to define a function called  black_jack  which consumes to 2 int values greater than 0. Return whichever value is nearest to 21 without going over. Return 0 if they both go over. Include a docstring!

Write three assertEqual statements to test your function.

Answer 1

import unittest


def black_jack(n1, n2):
    if n1 > 21:
        if n2 > 21:
            return 0
        return n2
    elif n2 > 21:
        return n1
    else:
        if n1 < n2:
            return n2
        else:
            return n1


class BlackJackTest(unittest.TestCase):
    def test_black_jack(self):
        self.assertEqual(black_jack(19, 20), 20)
        self.assertEqual(black_jack(14, 18), 18)
        self.assertEqual(black_jack(23, 29), 0)


unittest.main()