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annotate env/lib/python3.9/site-packages/networkx/algorithms/bipartite/tests/test_covering.py @ 0:4f3585e2f14b draft default tip
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author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 import networkx as nx |
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2 import networkx.algorithms.bipartite as bipartite |
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3 |
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4 |
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5 class TestMinEdgeCover: |
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6 """Tests for :func:`networkx.algorithms.bipartite.min_edge_cover`""" |
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7 |
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8 def test_empty_graph(self): |
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9 G = nx.Graph() |
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10 assert bipartite.min_edge_cover(G) == set() |
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11 |
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12 def test_graph_single_edge(self): |
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13 G = nx.Graph() |
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14 G.add_edge(0, 1) |
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15 assert bipartite.min_edge_cover(G) == {(0, 1), (1, 0)} |
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16 |
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17 def test_bipartite_default(self): |
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18 G = nx.Graph() |
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19 G.add_nodes_from([1, 2, 3, 4], bipartite=0) |
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20 G.add_nodes_from(["a", "b", "c"], bipartite=1) |
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21 G.add_edges_from([(1, "a"), (1, "b"), (2, "b"), (2, "c"), (3, "c"), (4, "a")]) |
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22 min_cover = bipartite.min_edge_cover(G) |
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23 assert nx.is_edge_cover(G, min_cover) |
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24 assert len(min_cover) == 8 |
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25 |
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26 def test_bipartite_explicit(self): |
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27 G = nx.Graph() |
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28 G.add_nodes_from([1, 2, 3, 4], bipartite=0) |
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29 G.add_nodes_from(["a", "b", "c"], bipartite=1) |
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30 G.add_edges_from([(1, "a"), (1, "b"), (2, "b"), (2, "c"), (3, "c"), (4, "a")]) |
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31 min_cover = bipartite.min_edge_cover(G, bipartite.eppstein_matching) |
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32 assert nx.is_edge_cover(G, min_cover) |
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33 assert len(min_cover) == 8 |