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TTD com Python, Cifra de Cesar
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| from string import ascii_uppercase | |
| def rottext(): | |
| alfabeto,rot = ascii_uppercase, 3 | |
| alfabeto_rotacionado = alfabeto[rot:] + alfabeto[:rot] | |
| return alfabeto, alfabeto_rotacionado | |
| def cesar_encrypt(plain_text: str) -> str: | |
| alf, alf_rot = rottext() | |
| tabela = str.maketrans(alf,alf_rot) | |
| return plain_text.translate(tabela) | |
| def cesar_decrypt(plain_text: str) -> str: | |
| alf, alf_rot = rottext() | |
| tabela = str.maketrans(alf_rot,alf) | |
| return plain_text.translate(tabela) | |
| def verifica_alfa(plain_text) -> bool: | |
| return plain_text.isalpha() |
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| from unittest import TestCase, main | |
| from cifracesar import rottext, cesar_encrypt, cesar_decrypt, verifica_alfa | |
| from string import ascii_uppercase | |
| class TestCifraCesar(TestCase): | |
| def test_rotacao_alfabeto(self): | |
| """ | |
| rot = 3 | |
| alfabeto = 'ABCDE' | |
| afabeto_rotacionado = 'DEABC' | |
| """ | |
| alfa_esperado_rot3 = 'DEFGHIJKLMNOPQRSTUVWXYZABC' | |
| self.assertEqual(alfa_esperado_rot3,rottext()[1]) | |
| def test_encrypt_cesar(self): | |
| """ | |
| rot = 3 | |
| plain_text = 'LOL' | |
| text_cifra = 'ORO' | |
| """ | |
| text_cifra_esperado = 'YDQGUH' | |
| self.assertEqual(text_cifra_esperado, cesar_encrypt('VANDRE')) | |
| def test_decrypt_cesar(self): | |
| """ | |
| rot = 3 | |
| plain_text = 'ORO' | |
| text_decifra = 'LOL' | |
| """ | |
| text_decifra_esperado = 'VANDRE' | |
| self.assertEqual(text_decifra_esperado, cesar_decrypt('YDQGUH')) | |
| def test_se_entrada_somente_text(self): | |
| """ | |
| não permite caracteres diferentes de 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' | |
| text_nao_esperado = '1ASWQ' | |
| """ | |
| text_nao_alfabeto = True | |
| self.assertEqual(text_nao_alfabeto, verifica_alfa('1ASWQ')) | |
| main() |
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