public void GetShortestPathBetweenTwoUsers_PathBetweenAB_AB()
        {
            ArrangeTwoUsers(out var userOne, out var userTwo, "A", "B");

            List <List <UserNode> > result = BreadthFirstSearch.GetShortestPathBetweenTwoUsers(userOne, userTwo);

            List <List <UserNode> > expected = new List <List <UserNode> >()
            {
                new List <UserNode> {
                    userOne, userTwo
                }
            };

            Assert.AreEqual(expected, result);
        }