public void AverageReturnFrom_ReturnsAverage()
{
var returns = new Returns();
var emptyBoard = Board.CreateEmptyBoard();
var action = new TicTacToeAction();
returns.Add(emptyBoard, action, 2);
returns.Add(emptyBoard, action, 4);
Assert.AreEqual(3, returns.AverageReturnFrom(emptyBoard, action));
}