public void IncrementScoreByOne(int currentScore)
{
var sut = new TennisPlayer(currentScore);
sut.IncrementScore();
var expectedScore = (TennisScore)(currentScore + 1);
Assert.AreEqual(expectedScore, sut.GetScore());
}
public void ThrowExceptionWhenInvalidScoreIsIncreased()
{
var sut = new TennisPlayer(5);
Assert.Throws <IndexOutOfRangeException>(() => sut.IncrementScore());
}
