public void Add_player()
{
Square square = new Square(position: 0, category: Category.Pop);
square.Add(A_PLAYER);
Assert.IsTrue(square.Players.Contains(A_PLAYER));
}
public void Remove_player()
{
Square square = new Square(position: 0, category: Category.Pop);
square.Add(A_PLAYER);
square.Remove(A_PLAYER);
Assert.IsFalse(square.Players.Contains(A_PLAYER));
}