code: def test_digraph_rev(self):
      G = nx.DiGraph(self.edges)
      x = list(edge_dfs(G, self.nodes, orientation="reverse"))
      x_ = [
          (1, 0, REVERSE),
          (0, 1, REVERSE),
          (2, 1, REVERSE),
          (3, 1, REVERSE),
      ]
      assert x == x_
  
imports: import pytest
  import networkx
  from networkx.algorithms import edge_dfs
  from networkx.algorithms.traversal.edgedfs import FORWARD, REVERSE
label_desc: Use image node_id 9 for calling the TestEdgeDFS obj's underlying member method code with example usage: obj.test_digraph_rev() without return types