class_docstr: Tests for bipartite matching algorithms.
class_docstr_tok: ["Tests","for","bipartite","matching","algorithms","."]
code: def test_unorderable_nodes(self):
      a = object()
      b = object()
      c = object()
      d = object()
      e = object()
      G = nx.Graph([(a, d), (b, d), (b, e), (c, d)])
      matching = maximum_matching(G)
      vertex_cover = to_vertex_cover(G, matching)
      for u, v in G.edges():
          assert u in vertex_cover or v in vertex_cover
  
imports: import itertools
  import pytest
  import networkx
  from networkx.algorithms.bipartite.matching import eppstein_matching, hopcroft_karp_matching, maximum_matching, minimum_weight_full_matching, to_vertex_cover
label_desc: Use image node_id 14 for calling the TestMatching obj's underlying member method code with example usage: obj.test_unorderable_nodes() without return types