public void ChangeSides()
{
TennisGame game = new TennisGame("Name_1", "Name_2");
game.ChangeSides();
Assert.IsTrue((game.LeftSide() == game.Player_2()) && (game.RightSide() == game.Player_1()));
}
public void StartRightSide()
{
TennisGame game = new TennisGame("Name_1", "Name_2");
Assert.IsTrue(game.RightSide() == game.Player_2());
}