public void OpenTest()
{
List <int> balls = new List <int>();
Open frame = new Open(1, 1);
frame.AddBalls(ref balls);
Assert.Equal(2, frame.Score);
Assert.Equal <int>(new int[] { 1, 1 }, frame.PinsPerBall);
Assert.Equal <int>(new int[] { 1, 1 }, balls);
}