Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/tests/test_chordal.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 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 class TestMCS: |
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6 @classmethod |
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7 def setup_class(cls): |
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8 # simple graph |
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9 connected_chordal_G = nx.Graph() |
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10 connected_chordal_G.add_edges_from( |
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11 [ |
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22 ] |
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23 ) |
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24 cls.connected_chordal_G = connected_chordal_G |
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25 |
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26 chordal_G = nx.Graph() |
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27 chordal_G.add_edges_from( |
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28 [ |
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40 ] |
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41 ) |
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42 chordal_G.add_node(9) |
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43 cls.chordal_G = chordal_G |
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44 |
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45 non_chordal_G = nx.Graph() |
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46 non_chordal_G.add_edges_from([(1, 2), (1, 3), (2, 4), (2, 5), (3, 4), (3, 5)]) |
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47 cls.non_chordal_G = non_chordal_G |
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48 |
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49 def test_is_chordal(self): |
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50 assert not nx.is_chordal(self.non_chordal_G) |
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51 assert nx.is_chordal(self.chordal_G) |
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52 assert nx.is_chordal(self.connected_chordal_G) |
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53 assert nx.is_chordal(nx.complete_graph(3)) |
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54 assert nx.is_chordal(nx.cycle_graph(3)) |
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55 assert not nx.is_chordal(nx.cycle_graph(5)) |
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56 |
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57 def test_induced_nodes(self): |
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58 G = nx.generators.classic.path_graph(10) |
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59 Induced_nodes = nx.find_induced_nodes(G, 1, 9, 2) |
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60 assert Induced_nodes == {1, 2, 3, 4, 5, 6, 7, 8, 9} |
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61 pytest.raises( |
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62 nx.NetworkXTreewidthBoundExceeded, nx.find_induced_nodes, G, 1, 9, 1 |
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63 ) |
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64 Induced_nodes = nx.find_induced_nodes(self.chordal_G, 1, 6) |
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65 assert Induced_nodes == {1, 2, 4, 6} |
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66 pytest.raises(nx.NetworkXError, nx.find_induced_nodes, self.non_chordal_G, 1, 5) |
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67 |
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68 def test_chordal_find_cliques(self): |
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69 cliques = { |
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70 frozenset([9]), |
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71 frozenset([7, 8]), |
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72 frozenset([1, 2, 3]), |
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73 frozenset([2, 3, 4]), |
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74 frozenset([3, 4, 5, 6]), |
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75 } |
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76 assert nx.chordal_graph_cliques(self.chordal_G) == cliques |
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77 |
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78 def test_chordal_find_cliques_path(self): |
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79 G = nx.path_graph(10) |
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80 cliqueset = nx.chordal_graph_cliques(G) |
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81 for (u, v) in G.edges(): |
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82 assert frozenset([u, v]) in cliqueset or frozenset([v, u]) in cliqueset |
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83 |
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84 def test_chordal_find_cliquesCC(self): |
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85 cliques = {frozenset([1, 2, 3]), frozenset([2, 3, 4]), frozenset([3, 4, 5, 6])} |
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86 cgc = nx.chordal_graph_cliques |
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87 assert cgc(self.connected_chordal_G) == cliques |
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88 |
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89 def test_complete_to_chordal_graph(self): |
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90 fgrg = nx.fast_gnp_random_graph |
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91 test_graphs = [ |
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92 nx.barbell_graph(6, 2), |
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93 nx.cycle_graph(15), |
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94 nx.wheel_graph(20), |
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95 nx.grid_graph([10, 4]), |
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96 nx.ladder_graph(15), |
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97 nx.star_graph(5), |
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98 nx.bull_graph(), |
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99 fgrg(20, 0.3, seed=1), |
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101 for G in test_graphs: |
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102 H, a = nx.complete_to_chordal_graph(G) |
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103 assert nx.is_chordal(H) |
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104 assert len(a) == H.number_of_nodes() |
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105 if nx.is_chordal(G): |
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106 assert G.number_of_edges() == H.number_of_edges() |
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107 assert set(a.values()) == {0} |
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108 else: |
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diff
changeset
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109 assert len(set(a.values())) == H.number_of_nodes() |