code: def test_astar_undirected3(self):
      XG4 = nx.Graph()
      edges = [
          (0, 1, 2),
          (1, 2, 2),
          (2, 3, 1),
          (3, 4, 1),
          (4, 5, 1),
          (5, 6, 1),
          (6, 7, 1),
          (7, 0, 1),
      ]
      XG4.add_weighted_edges_from(edges)
      assert nx.astar_path(XG4, 0, 2) == [0, 1, 2]
      assert nx.astar_path_length(XG4, 0, 2) == 4
  
imports: import pytest
  import networkx
  from networkx.utils import pairwise
label_desc: Use image node_id 9 for calling the TestAStar obj's underlying member method code with example usage: obj.test_astar_undirected3() without return types