public void ShiftAlphabetTest()
{
Action act = () => Decoder.DecodeAlphabet(-1);
act.Should().Throw <InvalidOperationException>()
.WithMessage("Shift must be greater or equal 0");
var shiftedAlphabet = Decoder.DecodeAlphabet(23);
shiftedAlphabet.Length.Should().Be(26);
shiftedAlphabet[0].Should().Be('X');
shiftedAlphabet[1].Should().Be('Y');
shiftedAlphabet[2].Should().Be('Z');
shiftedAlphabet[25].Should().Be('W');
}
public void DecodeAlphabetTest()
{
Action act = () => Decoder.DecodeAlphabet(-1);
act.Should().Throw <InvalidOperationException>()
.WithMessage("Shift must be greater or equal 0");
var decodedAlphabet = Decoder.DecodeAlphabet(23);
decodedAlphabet.Length.Should().Be(26);
decodedAlphabet[0].Should().Be('X');
decodedAlphabet[1].Should().Be('Y');
decodedAlphabet[2].Should().Be('Z');
decodedAlphabet[3].Should().Be('A');
decodedAlphabet[4].Should().Be('B');
decodedAlphabet[5].Should().Be('C');
decodedAlphabet[25].Should().Be('W');
Array.IndexOf(decodedAlphabet, 'Q').Should()
.Be(Decoder.Alphabet.IndexOf('T'));
decodedAlphabet.Contains(Char.ToUpper('q')).Should().BeTrue();
}