code: def test_random_cograph():
      n = 3
      G = nx.random_cograph(n)
  
      assert len(G) == 2**n
  
      # Every connected subgraph of G has diameter <= 2
      if nx.is_connected(G):
          assert nx.diameter(G) <= 2
      else:
          components = nx.connected_components(G)
          for component in components:
              assert nx.diameter(G.subgraph(component)) <= 2
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_random_cograph() without return types