def test_letter_storage_put_letter_not_str(self):
"""
non string letter is not added to storage
"""
letter_storage = LetterStorage()
letter = 123
expected = 1
actual = letter_storage._put_letter(letter)
self.assertEqual(letter_storage.storage, {})
self.assertEqual(expected, actual)
def test_letter_storage_put_letter_ideal(self):
"""
letter is added to storage
"""
letter_storage = LetterStorage()
letter = 'w'
expected = 0
actual = letter_storage._put_letter(letter)
self.assertTrue(letter in letter_storage.storage)
self.assertEqual(expected, actual)
def test_letter_storage_put_letter_existing(self):
"""
existing letter is not added to storage
"""
letter_storage = LetterStorage()
letter = 'w'
letter_storage.storage = {'w': 1}
expected = 0
actual = letter_storage._put_letter(letter)
self.assertEqual(letter_storage.storage, {'w': 1})
self.assertEqual(expected, actual)