code: def test_directed_not_strongly_connected(self):
      G = nx.DiGraph([(0, 1)])
      with pytest.raises(
          nx.NetworkXError, match="Graph is not strongly connected"
      ):
          nx.average_shortest_path_length(G)
  
imports: import pytest
  import networkx
label_desc: Use image node_id 5 for calling the TestAverageShortestPathLength obj's underlying member method code with example usage: obj.test_directed_not_strongly_connected() without return types