code: def test_star_graph(self):
      assert is_isomorphic(nx.star_graph(""), nx.empty_graph(0))
      assert is_isomorphic(nx.star_graph([]), nx.empty_graph(0))
      assert is_isomorphic(nx.star_graph(0), nx.empty_graph(1))
      assert is_isomorphic(nx.star_graph(1), nx.path_graph(2))
      assert is_isomorphic(nx.star_graph(2), nx.path_graph(3))
      assert is_isomorphic(
          nx.star_graph(5), nx.complete_bipartite_graph(1, 5)
      )
  
      s = nx.star_graph(10)
      assert sorted(d for n, d in s.degree()) == [
          1,
          1,
          1,
          1,
          1,
          1,
          1,
          1,
          1,
          1,
          10,
      ]
  
      pytest.raises(
          nx.NetworkXError, nx.star_graph, 10, create_using=nx.DiGraph
      )
  
      ms = nx.star_graph(10, create_using=nx.MultiGraph)
      assert edges_equal(ms.edges(), s.edges())
  
      G = nx.star_graph("abc")
      assert len(G) == 3
      assert G.size() == 2
  
      G = nx.star_graph("abcb")
      assert len(G) == 3
      assert G.size() == 2
      G = nx.star_graph("abcb", create_using=nx.MultiGraph)
      assert len(G) == 3
      assert G.size() == 3
  
      G = nx.star_graph("abcdefg")
      assert len(G) == 7
      assert G.size() == 6
  
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 29 for calling the TestGeneratorClassic obj's underlying member method code with example usage: obj.test_star_graph() without return types