code: def test_empty(self):
      G = nx.Graph()
      edges = list(nx.edge_bfs(G))
      assert edges == []
  
imports: import pytest
  import networkx
  from networkx.algorithms.traversal.edgedfs import FORWARD, REVERSE
label_desc: Use image node_id 2 for calling the TestEdgeBFS obj's underlying member method code with example usage: obj.test_empty() without return types