class_docstr: Tests for bipartite matching algorithms.
class_docstr_tok: ["Tests","for","bipartite","matching","algorithms","."]
code: def test_vertex_cover_issue_3306(self):
      G = nx.Graph()
      edges = [(0, 2), (1, 0), (1, 1), (1, 2), (2, 2)]
      G.add_edges_from([((i, "L"), (j, "R")) for i, j in edges])
  
      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 13 for calling the TestMatching obj's underlying member method code with example usage: obj.test_vertex_cover_issue_3306() without return types