public void TestEncrypt() { string message = "coucou, tu veux voir mon message ?"; byte[] bytes = Encoding.UTF8.GetBytes(message); AesKey k = new AesKey(); var data = new MemoryStream(bytes); var ciphertext = k.Encrypt(data); var plaintext = k.Decrypt(ciphertext); Assert.Equal( message, Encoding.UTF8.GetString(plaintext.ToArray()) ); }