public void GetFriendsInDistance_DistanceOneFromD_CEG()
{
UserNode user = Users.Find(u => u.LastName.Equals("D"));
List <string> result = BreadthFirstSearch.GetFriendsInDistance(user, 1).Select(u => u.LastName).ToList();
Assert.AreEqual(new List <string> {
"C", "E", "G"
}, result);
}
