Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/tests/test_dominating.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 pytest |
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2 import networkx as nx |
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3 |
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4 |
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5 def test_dominating_set(): |
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6 G = nx.gnp_random_graph(100, 0.1) |
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7 D = nx.dominating_set(G) |
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8 assert nx.is_dominating_set(G, D) |
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9 D = nx.dominating_set(G, start_with=0) |
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10 assert nx.is_dominating_set(G, D) |
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11 |
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12 |
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13 def test_complete(): |
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14 """ In complete graphs each node is a dominating set. |
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15 Thus the dominating set has to be of cardinality 1. |
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16 """ |
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17 K4 = nx.complete_graph(4) |
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18 assert len(nx.dominating_set(K4)) == 1 |
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19 K5 = nx.complete_graph(5) |
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20 assert len(nx.dominating_set(K5)) == 1 |
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21 |
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22 |
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23 def test_raise_dominating_set(): |
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24 with pytest.raises(nx.NetworkXError): |
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25 G = nx.path_graph(4) |
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26 D = nx.dominating_set(G, start_with=10) |
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27 |
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28 |
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29 def test_is_dominating_set(): |
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30 G = nx.path_graph(4) |
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31 d = {1, 3} |
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32 assert nx.is_dominating_set(G, d) |
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33 d = {0, 2} |
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34 assert nx.is_dominating_set(G, d) |
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35 d = {1} |
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36 assert not nx.is_dominating_set(G, d) |
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37 |
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38 |
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39 def test_wikipedia_is_dominating_set(): |
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40 """Example from https://en.wikipedia.org/wiki/Dominating_set |
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41 """ |
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42 G = nx.cycle_graph(4) |
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43 G.add_edges_from([(0, 4), (1, 4), (2, 5)]) |
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44 assert nx.is_dominating_set(G, {4, 3, 5}) |
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45 assert nx.is_dominating_set(G, {0, 2}) |
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46 assert nx.is_dominating_set(G, {1, 2}) |