docstr: This edgecase is one of the cases in which it is hard to find all
  symmetry elements.
docstr_tok: ["This","edgecase","is","one","of","the","cases","in","which","it","is","hard","to","find","all","symmetry","elements","."]
code: def test_edgecase_self_isomorphism(self):
      """
      This edgecase is one of the cases in which it is hard to find all
      symmetry elements.
      """
      graph = nx.Graph()
      nx.add_path(graph, range(5))
      graph.add_edges_from([(2, 5), (5, 6)])
  
      ismags = iso.ISMAGS(graph, graph)
      ismags_answer = list(ismags.find_isomorphisms(True))
      assert ismags_answer == [{n: n for n in graph.nodes}]
  
      graph = nx.relabel_nodes(
          graph, {0: 0, 1: 1, 2: 2, 3: 3, 4: 6, 5: 4, 6: 5}
      )
      ismags = iso.ISMAGS(graph, graph)
      ismags_answer = list(ismags.find_isomorphisms(True))
      assert ismags_answer == [{n: n for n in graph.nodes}]
  
file_path: networkx/networkx/algorithms/isomorphism/tests/test_ismags.py
imports: import pytest
  import networkx
  from networkx.algorithms import isomorphism
label_desc: Use image node_id 2 for calling the TestSelfIsomorphism obj's underlying member method code with example usage: obj.test_edgecase_self_isomorphism() without return types