def test_decrypt_returns_correct_decoded_text_with_shift_13(self):
encoded_text = 'vslbhnerbagurpragranelgenvyxrrcfbyivatgurpunyyratrf'
shift = 13
alphabet = string.ascii_lowercase
decoded_text = CaesarCipher().decrypt(encoded_text, alphabet, shift)
self.assertEqual('ifyouareonthecentenarytrailkeepsolvingthechallenges', decoded_text)
def test_create_shifted_alphabet(self):
alphabet = string.ascii_lowercase
shift = 1
shifted_alphabet = CaesarCipher().create_shifted_alphabet(alphabet, shift)
self.assertEqual('bcdefghijklmnopqrstuvwxyza', shifted_alphabet)
def test_encrypt_returns_original_text_on_zero_shift(self):
plain_text = string.ascii_lowercase
shift = 0
alphabet = string.ascii_lowercase
encoded_text = CaesarCipher().encrypt(plain_text, alphabet, shift)
self.assertEqual(string.ascii_lowercase, encoded_text)
def test_decrypt_works_with_empty_text(self):
encoded_text = ''
shift = 1
alphabet = string.ascii_lowercase
decoded_text = CaesarCipher().decrypt(encoded_text, alphabet, shift)
self.assertEqual('', decoded_text)
def test_encrypt_works_with_empty_text(self):
plain_text = ''
shift = 1
alphabet = string.ascii_lowercase
encoded_text = CaesarCipher().encrypt(plain_text, alphabet, shift)
self.assertEqual('', encoded_text)
def exhaust(cipher, alphabet):
merged_cipher = sanitiser.merge_cipher_blocks(cipher)
caesar_cipher = CaesarCipher()
for shift in range(len(alphabet)):
yield caesar_cipher.decrypt(merged_cipher, alphabet, shift)