test_letters.py

#!/usr/bin/env python3

"""
# test_letters.py

Perform unit testing for `letters.py`.

Copyright 2022 Conway
Licensed under the GNU General Public License v3.0 (GPL-3.0-only).
This is free software with NO WARRANTY etc. etc., see LICENSE.
"""


import letters
import unittest


class TestLetters(unittest.TestCase):
  
  def test_normalise_letters(self):
    self.assertEqual(letters.normalise_letters('abc'), 'ABC')
    self.assertEqual(letters.normalise_letters('HeRpdERP'), 'HERPDERP')
    self.assertEqual(letters.normalise_letters(' whitespace\t'), 'WHITESPACE')
  
  def test_is_valid(self):
    self.assertTrue(letters.is_valid('A', 'A'))
    self.assertTrue(letters.is_valid('A', 'AA'))
    self.assertTrue(letters.is_valid('ABC', 'AABBCCDD'))
    self.assertTrue(letters.is_valid('ABBCCCDDDD', 'QWERTYDDDDCCCBBAA'))
    self.assertTrue(letters.is_valid('RADAR', 'RADAR'))
    self.assertFalse(letters.is_valid('A', 'X'))
    self.assertFalse(letters.is_valid('AA', 'A'))
    self.assertFalse(letters.is_valid('RADAR', 'DARAD'))


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