public string ScoreAgainstAnother(ScoreArray opponent)
        {
            for (int index = 0; index < _scores.Count; index++)
            {
                _myScore += opponent.EvaluateAgainstOpponent(_scores[index], index);
            }

            return(opponent.AppendScore($"{_myScore} "));
        }
        public void ShouldAppendScore()
        {
            // arrange
            ScoreArray scoreArray = new ScoreArray(new List <int>());

            // act
            string actual = scoreArray.AppendScore("");

            // assert
            actual.Should().Be("0");
        }