class_docstr: Unit tests for the min_degree function
docstr: Test Petersen graph tree decomposition result
docstr_tok: ["Test","Petersen","graph","tree","decomposition","result"]
code: def test_petersen_graph(self):
      """Test Petersen graph tree decomposition result"""
      G = nx.petersen_graph()
      _, decomp = treewidth_min_degree(G)
      is_tree_decomp(G, decomp)
  
imports: import itertools
  import networkx
  from networkx.algorithms.approximation import treewidth_min_degree, treewidth_min_fill_in
  from networkx.algorithms.approximation.treewidth import MinDegreeHeuristic, min_fill_in_heuristic
label_desc: Use image node_id 2 for calling the TestTreewidthMinDegree obj's underlying member method code with example usage: obj.test_petersen_graph() without return types