public void SHOULD_return_value_of_provided_letter()
            {
                var letter = Letters.X;

                var sut = new Lib.SingleLetterChunk(letter);

                Assert.That(sut.Value, Is.EqualTo(letter.Value));
            }
            public void WHEN_compared_greater_and_smaller_letters_THEN_should_recognize_first_is_greater()
            {
                var firstLetter  = Letters.X;
                var secondLetter = Letters.X;

                var firstChunk  = new Lib.SingleLetterChunk(firstLetter);
                var secondChunk = new Lib.SingleLetterChunk(secondLetter);
                var result      = firstChunk.CompareTo(secondChunk);

                Assert.That(result, Is.EqualTo(1));
            }