code: def test_simple_communities(self):
      # This graph is the disjoint union of two triangles.
      G = nx.Graph(["ab", "ac", "bc", "de", "df", "fe"])
      ground_truth = {frozenset("abc"), frozenset("def")}
      self._check_communities(G, ground_truth)
  
imports: from itertools import chain, combinations
  import pytest
  import networkx
label_desc: Use image node_id 4 for calling the TestAsynLpaCommunities obj's underlying member method code with example usage: obj.test_simple_communities() without return types