def test_can_encode(self):
cipher = Cipher()
plaintext = 'aaaaaaaaaa'
self.assertEqual(cipher.encode(plaintext), cipher.key[:len(plaintext)])
def test_throws_an_error_with_all_uppercase_key(self):
with self.assertRaisesWithMessage(ValueError):
Cipher('ABCDEF')
def test_throws_an_error_with_empty_key(self):
with self.assertRaisesWithMessage(ValueError):
Cipher('')
def test_encode_always_returns_downcase_string(self):
cipher = Cipher()
plaintext = 'AbCdEfGhIj'
ciphertext = 'bcdefghijk'
self.assertEqual(ciphertext, cipher.encode(plaintext))
def test_can_wrap_on_decode(self):
cipher = Cipher('abcdefghij')
self.assertEqual(cipher.decode('zabcdefghi'), 'zzzzzzzzzz')
def test_can_wrap_on_decode(self):
cipher = Cipher('abcdefghij')
self.assertEqual(cipher.decode('zabcdefghi'), 'zzzzzzzzzz')
def test_cipher_encode4(self):
key = ('duxrceqyaimciuucnelkeoxjhdyduucpmrxmaivacmybmsdrzwqxvbxsy'
'gzsabdjmdjabeorttiwinfrpmpogvabiofqexnohrqu')
c = Cipher(key)
self.assertEqual('gccwkixcltycv', c.encode('diffiehellman'))
def test_can_wrap_on_decode(self):
cipher = Cipher("abcdefghij")
self.assertEqual(cipher.decode("zabcdefghi"), "zzzzzzzzzz")
def test_can_encode_messages_longer_than_the_key(self):
cipher = Cipher("abc")
plaintext = "iamapandabear"
self.assertEqual(cipher.encode(plaintext), "iboaqcnecbfcr")
def test_can_double_shift_encode(self):
cipher = Cipher("iamapandabear")
plaintext = "iamapandabear"
self.assertEqual(cipher.encode(plaintext), "qayaeaagaciai")
def test_can_wrap_on_encode(self):
cipher = Cipher("abcdefghij")
plaintext = "zzzzzzzzzz"
self.assertEqual(cipher.encode(plaintext), "zabcdefghi")
def test_can_decode(self):
cipher = Cipher("abcdefghij")
self.assertEqual(cipher.decode(cipher.key), "aaaaaaaaaa")
def test_can_encode(self):
cipher = Cipher("abcdefghij")
plaintext = "aaaaaaaaaa"
self.assertEqual(cipher.encode(plaintext), cipher.key)
def test_can_encode(self):
cipher = Cipher()
plaintext = "aaaaaaaaaa"
self.assertEqual(cipher.encode(plaintext), cipher.key[0: len(plaintext)])
def test_can_encode(self):
cipher = Cipher('abcdefghij')
self.assertEqual(cipher.encode('aaaaaaaaaa'), cipher.key)
def test_can_decode_messages_longer_than_the_key(self):
cipher = Cipher("abc")
self.assertEqual(cipher.decode("iboaqcnecbfcr"), "iamapandabear")
def test_is_reversible(self):
cipher = Cipher('abcdefghij')
plaintext = 'abcdefghij'
self.assertEqual(cipher.decode(cipher.encode(plaintext)), plaintext)
def test_cipher_encode2(self):
c = Cipher('aaaaaaaaaaaaaaaaaaaaaa')
self.assertEqual(
c.encode('itisawesomeprogramminginpython'),
'itisawesomeprogramminginpython')
def test_cipher_encode2(self):
c = Cipher('aaaaaaaaaaaaaaaaaaaaaa')
self.assertEqual('itisawesomeprogramminginpython',
c.encode('itisawesomeprogramminginpython'))
def test_cipher_encode3(self):
c = Cipher('dddddddddddddddddddddd')
self.assertEqual(c.encode('venividivici'), 'yhqlylglylfl')
def test_cipher_compositiion1(self):
key = ('duxrceqyaimciuucnelkeoxjhdyduucpmrxmaivacmybmsdrzwqxvbxsy'
'gzsabdjmdjabeorttiwinfrpmpogvabiofqexnohrqu')
plaintext = 'adaywithoutlaughterisadaywasted'
c = Cipher(key)
self.assertEqual(plaintext, c.decode(c.encode(plaintext)))
def test_cipher_encode4(self):
key = ('duxrceqyaimciuucnelkeoxjhdyduucpmrxmaivacmybmsdrzwqxvbxsy'
'gzsabdjmdjabeorttiwinfrpmpogvabiofqexnohrqu')
c = Cipher(key)
self.assertEqual(c.encode('diffiehellman'), 'gccwkixcltycv')
def test_can_double_shift_encode(self):
plaintext = 'iamapandabear'
cipher = Cipher(plaintext)
self.assertEqual(cipher.encode(plaintext), 'qayaeaagaciai')
def test_cipher_encode_short_key(self):
c = Cipher('abcd')
self.assertEqual(c.encode('aaaaaaaa'), 'abcdabcd')
def test_can_handle_messages_longer_than_key(self):
cipher = Cipher('abc')
self.assertEqual(cipher.encode('iamapandabear'), 'iboaqcnecbfcr')
def test_cipher_compositiion1(self):
key = ('duxrceqyaimciuucnelkeoxjhdyduucpmrxmaivacmybmsdrzwqxvbxsy'
'gzsabdjmdjabeorttiwinfrpmpogvabiofqexnohrqu')
plaintext = 'adaywithoutlaughterisadaywasted'
c = Cipher(key)
self.assertEqual(c.decode(c.encode(plaintext)), plaintext)
def test_throws_an_error_with_a_numeric_key(self):
with self.assertRaisesWithMessage(ValueError):
Cipher('12345')
def test_cipher_compositiion2(self):
plaintext = 'adaywithoutlaughterisadaywasted'
c = Cipher()
self.assertEqual(c.decode(c.encode(plaintext)), plaintext)
def test_can_decode(self):
cipher = Cipher()
self.assertEqual(cipher.decode(cipher.key[0:len("aaaaaaaaaa")]),
"aaaaaaaaaa")
def test_cipher_wrong_key(self):
with self.assertRaises(ValueError):
Cipher('a1cde')
with self.assertRaises(ValueError):
Cipher('aBcde')
def test_can_decode(self):
cipher = Cipher()
plaintext = 'aaaaaaaaaa'
self.assertEqual(cipher.decode(cipher.key[:len(plaintext)]), plaintext)
def test_can_encode(self):
cipher = Cipher()
self.assertEqual(cipher.encode('aaaaaaaaaa'), cipher.key[:10])
def test_can_decode(self):
cipher = Cipher('abcdefghij')
self.assertEqual(cipher.decode(cipher.key), 'aaaaaaaaaa')
def test_can_decode(self):
cipher = Cipher()
plaintext = 'aaaaaaaaaa'
self.assertEqual(cipher.decode(cipher.key[:len(plaintext)]), plaintext)
def test_can_double_shift_encode(self):
plaintext = 'iamapandabear'
cipher = Cipher(plaintext)
self.assertEqual(cipher.encode(plaintext), 'qayaeaagaciai')
def test_key_is_only_made_of_lowercase_letters(self):
self.assertIsNotNone(re.match('^[a-z]+$', Cipher().key))
def test_can_handle_messages_longer_than_key(self):
cipher = Cipher('abc')
self.assertEqual(cipher.encode('iamapandabear'), 'iboaqcnecbfcr')
def test_can_encode(self):
cipher = Cipher('abcdefghij')
self.assertEqual(cipher.encode('aaaaaaaaaa'), cipher.key)
def test_cipher_encode3(self):
c = Cipher('dddddddddddddddddddddd')
self.assertEqual('yhqlylglylfl', c.encode('venividivici'))
def test_can_decode(self):
cipher = Cipher('abcdefghij')
self.assertEqual(cipher.decode(cipher.key), 'aaaaaaaaaa')
def test_cipher_encode_short_key(self):
c = Cipher('abcd')
self.assertEqual('abcdabcd', c.encode('aaaaaaaa'))
def test_is_reversible(self):
cipher = Cipher('abcdefghij')
plaintext = 'abcdefghij'
self.assertEqual(cipher.decode(cipher.encode(plaintext)), plaintext)
def test_cipher_compositiion2(self):
plaintext = 'adaywithoutlaughterisadaywasted'
c = Cipher()
self.assertEqual(plaintext, c.decode(c.encode(plaintext)))
def test_encode_letter_with_default_shift_distance(self):
cipher = Cipher()
plaintext = 'a'
ciphertext = 'b'
self.assertEqual(ciphertext, cipher.encode(plaintext))
