code: def test_bidirectional_shortest_path(self):
      assert nx.bidirectional_shortest_path(self.cycle, 0, 3) == [
          0,
          1,
          2,
          3,
      ]
      assert nx.bidirectional_shortest_path(self.cycle, 0, 4) == [
          0,
          6,
          5,
          4,
      ]
      validate_grid_path(
          4, 4, 1, 12, nx.bidirectional_shortest_path(self.grid, 1, 12)
      )
      assert nx.bidirectional_shortest_path(
          self.directed_cycle, 0, 3
      ) == [0, 1, 2, 3]
      # test source = target
      assert nx.bidirectional_shortest_path(self.cycle, 3, 3) == [3]
  
file_path: networkx/networkx/algorithms/shortest_paths/tests/test_unweighted.py
imports: import pytest
  import networkx
label_desc: Use image node_id 2 for calling the TestUnweightedPath obj's underlying member method code with example usage: obj.test_bidirectional_shortest_path() without return types