code: def test_dorogovtsev_goltsev_mendes_graph(self):
      G = nx.dorogovtsev_goltsev_mendes_graph(0)
      assert edges_equal(G.edges(), [(0, 1)])
      assert nodes_equal(list(G), [0, 1])
      G = nx.dorogovtsev_goltsev_mendes_graph(1)
      assert edges_equal(G.edges(), [(0, 1), (0, 2), (1, 2)])
      assert nx.average_clustering(G) == 1.0
      assert sorted(nx.triangles(G).values()) == [1, 1, 1]
      G = nx.dorogovtsev_goltsev_mendes_graph(10)
      assert nx.number_of_nodes(G) == 29526
      assert nx.number_of_edges(G) == 59049
      assert G.degree(0) == 1024
      assert G.degree(1) == 1024
      assert G.degree(2) == 1024
  
      pytest.raises(
          nx.NetworkXError,
          nx.dorogovtsev_goltsev_mendes_graph,
          7,
          create_using=nx.DiGraph,
      )
      pytest.raises(
          nx.NetworkXError,
          nx.dorogovtsev_goltsev_mendes_graph,
          7,
          create_using=nx.MultiGraph,
      )
  
imports: import itertools
  import typing
  import pytest
  import networkx
  from networkx.algorithms.isomorphism.isomorph import graph_could_be_isomorphic
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 16 for calling the TestGeneratorClassic obj's underlying member method code with example usage: obj.test_dorogovtsev_goltsev_mendes_graph() without return types