// The plain text will be padded to fill the size of block (16 bytes), so the encoded message should be aligned with the rule
// (text.Length % 16 == 0)
public static void TestEncodedMessageSize(string testCase, uint key)
{
// Arrange
var encoder = new FeistelCipher();
// Assert
Assert.Throws <ArgumentException>(() => encoder.Decode(testCase, key));
}
public static void DecodedStringIsTheSame([Random(100)] uint key)
{
// Arrange
var encoder = new FeistelCipher();
var random = new Randomizer();
int lenOfString = random.Next(1000);
string message = random.GetString(lenOfString);
// Act
var encoded = encoder.Encode(message, key);
var decoded = encoder.Decode(encoded, key);
// Assert
Assert.AreEqual(message, decoded);
}