Challenge 154 - Validate Pin

challenge_154.md

Challenge 154 - Validate Pin

Create a function to test if a string is a valid pin or not.

A valid pin has:

• Exactly 4 or 6 characters.
• Only numerical characters (0-9).
• No whitespace.

Examples

valid("1234") ➞ True

valid("45135") ➞ False

valid("89abc1") ➞ False

valid("900876") ➞ True

valid(" 4983") ➞ False

Notes

• Empty strings should return False when tested.

challenge_tests.py

import unittest


def validate_pin(pin: str) -> bool:
    return False  # Put your code here!!!


class Test(unittest.TestCase):

    def test_1(self):
        self.assertEqual(validate_pin("123456"), True)

    def test_2(self):
        self.assertEqual(validate_pin("4512a5"), False)

    def test_3(self):
        self.assertEqual(validate_pin(""), False)

    def test_4(self):
        self.assertEqual(validate_pin("21904"), False)

    def test_5(self):
        self.assertEqual(validate_pin("9451"), True)

    def test_6(self):
        self.assertEqual(validate_pin("213132"), True)

    def test_7(self):
        self.assertEqual(validate_pin(" 4520"), False)

    def test_8(self):
        self.assertEqual(validate_pin("15632 "), False)

    def test_9(self):
        self.assertEqual(validate_pin("000000"), True)


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

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