public void DecodedStringIsTheSame()
{
// Arrange
var encoder = new HillEncoder();
var random = new Randomizer();
var message = random.GetString();
var key = new double[, ] {
{ 2, 4, 5 }, { 9, 2, 1 }, { 3, 17, 7 }
};
// Act
var encodedText = encoder.Encode(message, key);
var decodeText = encoder.Decode(encodedText, key);
// Assert
Assert.AreEqual(message, decodeText);
}