public void By_Methods__Take_And_Return_A_List_of_Friends()
 {
     OrderFriends.ByName(new List <Friend>()).Should().BeOfType <List <Friend> >();
     OrderFriends.ByOnlineStatus(new List <Friend>()).Should().BeOfType <List <Friend> >();
     OrderFriends.ByLastSeen(new List <Friend>()).Should().BeOfType <List <Friend> >();
     OrderFriends.ByLevel(new List <Friend>()).Should().BeOfType <List <Friend> >();
 }
        public void ByName__Sort_Friends_By_Name_Alphabetically()
        {
            var newFriendsOrder = OrderFriends.ByName(_friends);

            newFriendsOrder.Should().BeInAscendingOrder(friend => friend.Name);
        }