code: def test_cycle(self):
      C = nx.cycle_graph(7)
      assert nx.astar_path(C, 0, 3) == [0, 1, 2, 3]
      assert nx.dijkstra_path(C, 0, 4) == [0, 6, 5, 4]
  
imports: import pytest
  import networkx
  from networkx.utils import pairwise
label_desc: Use image node_id 18 for calling the TestAStar obj's underlying member method code with example usage: obj.test_cycle() without return types