Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/centrality/tests/test_reaching.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """Unit tests for the :mod:`networkx.algorithms.centrality.reaching` module.""" |
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2 import pytest |
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3 |
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4 from networkx import nx |
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5 from networkx.testing import almost_equal |
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6 |
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7 |
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8 class TestGlobalReachingCentrality: |
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9 """Unit tests for the global reaching centrality function.""" |
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10 |
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11 def test_non_positive_weights(self): |
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12 with pytest.raises(nx.NetworkXError): |
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13 G = nx.DiGraph() |
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14 nx.global_reaching_centrality(G, weight="weight") |
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15 |
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16 def test_negatively_weighted(self): |
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17 with pytest.raises(nx.NetworkXError): |
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18 G = nx.Graph() |
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19 G.add_weighted_edges_from([(0, 1, -2), (1, 2, +1)]) |
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20 nx.global_reaching_centrality(G, weight="weight") |
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21 |
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22 def test_directed_star(self): |
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23 G = nx.DiGraph() |
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24 G.add_weighted_edges_from([(1, 2, 0.5), (1, 3, 0.5)]) |
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25 grc = nx.global_reaching_centrality |
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26 assert grc(G, normalized=False, weight="weight") == 0.5 |
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27 assert grc(G) == 1 |
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28 |
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29 def test_undirected_unweighted_star(self): |
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30 G = nx.star_graph(2) |
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31 grc = nx.global_reaching_centrality |
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32 assert grc(G, normalized=False, weight=None) == 0.25 |
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33 |
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34 def test_undirected_weighted_star(self): |
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35 G = nx.Graph() |
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36 G.add_weighted_edges_from([(1, 2, 1), (1, 3, 2)]) |
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37 grc = nx.global_reaching_centrality |
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38 assert grc(G, normalized=False, weight="weight") == 0.375 |
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39 |
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40 def test_cycle_directed_unweighted(self): |
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41 G = nx.DiGraph() |
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42 G.add_edge(1, 2) |
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43 G.add_edge(2, 1) |
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44 assert nx.global_reaching_centrality(G, weight=None) == 0 |
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45 |
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46 def test_cycle_undirected_unweighted(self): |
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47 G = nx.Graph() |
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48 G.add_edge(1, 2) |
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49 assert nx.global_reaching_centrality(G, weight=None) == 0 |
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50 |
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51 def test_cycle_directed_weighted(self): |
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52 G = nx.DiGraph() |
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53 G.add_weighted_edges_from([(1, 2, 1), (2, 1, 1)]) |
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54 assert nx.global_reaching_centrality(G) == 0 |
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55 |
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56 def test_cycle_undirected_weighted(self): |
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57 G = nx.Graph() |
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58 G.add_edge(1, 2, weight=1) |
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59 grc = nx.global_reaching_centrality |
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60 assert grc(G, normalized=False) == 0 |
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61 |
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62 def test_directed_weighted(self): |
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63 G = nx.DiGraph() |
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64 G.add_edge("A", "B", weight=5) |
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65 G.add_edge("B", "C", weight=1) |
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66 G.add_edge("B", "D", weight=0.25) |
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67 G.add_edge("D", "E", weight=1) |
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68 |
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69 denom = len(G) - 1 |
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70 A_local = sum([5, 3, 2.625, 2.0833333333333]) / denom |
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71 B_local = sum([1, 0.25, 0.625]) / denom |
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72 C_local = 0 |
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73 D_local = sum([1]) / denom |
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74 E_local = 0 |
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75 |
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76 local_reach_ctrs = [A_local, C_local, B_local, D_local, E_local] |
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77 max_local = max(local_reach_ctrs) |
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78 expected = sum(max_local - lrc for lrc in local_reach_ctrs) / denom |
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79 grc = nx.global_reaching_centrality |
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80 actual = grc(G, normalized=False, weight="weight") |
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81 assert almost_equal(expected, actual, places=7) |
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82 |
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83 |
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84 class TestLocalReachingCentrality: |
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85 """Unit tests for the local reaching centrality function.""" |
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86 |
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87 def test_non_positive_weights(self): |
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88 with pytest.raises(nx.NetworkXError): |
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89 G = nx.DiGraph() |
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90 G.add_weighted_edges_from([(0, 1, 0)]) |
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91 nx.local_reaching_centrality(G, 0, weight="weight") |
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92 |
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93 def test_negatively_weighted(self): |
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94 with pytest.raises(nx.NetworkXError): |
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95 G = nx.Graph() |
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96 G.add_weighted_edges_from([(0, 1, -2), (1, 2, +1)]) |
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97 nx.local_reaching_centrality(G, 0, weight="weight") |
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98 |
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99 def test_undirected_unweighted_star(self): |
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100 G = nx.star_graph(2) |
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101 grc = nx.local_reaching_centrality |
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102 assert grc(G, 1, weight=None, normalized=False) == 0.75 |
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103 |
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104 def test_undirected_weighted_star(self): |
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105 G = nx.Graph() |
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106 G.add_weighted_edges_from([(1, 2, 1), (1, 3, 2)]) |
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107 centrality = nx.local_reaching_centrality( |
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108 G, 1, normalized=False, weight="weight" |
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109 ) |
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110 assert centrality == 1.5 |