Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/traversal/tests/test_edgebfs.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 |
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3 import networkx as nx |
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4 |
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5 edge_bfs = nx.edge_bfs |
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6 |
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7 FORWARD = nx.algorithms.edgedfs.FORWARD |
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8 REVERSE = nx.algorithms.edgedfs.REVERSE |
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9 |
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10 |
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11 class TestEdgeBFS: |
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12 @classmethod |
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13 def setup_class(cls): |
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14 cls.nodes = [0, 1, 2, 3] |
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15 cls.edges = [(0, 1), (1, 0), (1, 0), (2, 0), (2, 1), (3, 1)] |
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16 |
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17 def test_empty(self): |
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18 G = nx.Graph() |
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19 edges = list(edge_bfs(G)) |
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20 assert edges == [] |
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21 |
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22 def test_graph_single_source(self): |
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23 G = nx.Graph(self.edges) |
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24 G.add_edge(4, 5) |
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25 x = list(edge_bfs(G, [0])) |
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26 x_ = [(0, 1), (0, 2), (1, 2), (1, 3)] |
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27 assert x == x_ |
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28 |
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29 def test_graph(self): |
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30 G = nx.Graph(self.edges) |
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31 x = list(edge_bfs(G, self.nodes)) |
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32 x_ = [(0, 1), (0, 2), (1, 2), (1, 3)] |
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33 assert x == x_ |
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34 |
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35 def test_digraph(self): |
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36 G = nx.DiGraph(self.edges) |
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37 x = list(edge_bfs(G, self.nodes)) |
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38 x_ = [(0, 1), (1, 0), (2, 0), (2, 1), (3, 1)] |
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39 assert x == x_ |
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40 |
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41 def test_digraph_orientation_invalid(self): |
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42 G = nx.DiGraph(self.edges) |
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43 edge_iterator = edge_bfs(G, self.nodes, orientation="hello") |
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44 pytest.raises(nx.NetworkXError, list, edge_iterator) |
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45 |
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46 def test_digraph_orientation_none(self): |
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47 G = nx.DiGraph(self.edges) |
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48 x = list(edge_bfs(G, self.nodes, orientation=None)) |
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49 x_ = [(0, 1), (1, 0), (2, 0), (2, 1), (3, 1)] |
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50 assert x == x_ |
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51 |
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52 def test_digraph_orientation_original(self): |
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53 G = nx.DiGraph(self.edges) |
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54 x = list(edge_bfs(G, self.nodes, orientation="original")) |
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55 x_ = [ |
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56 (0, 1, FORWARD), |
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57 (1, 0, FORWARD), |
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58 (2, 0, FORWARD), |
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59 (2, 1, FORWARD), |
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60 (3, 1, FORWARD), |
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61 ] |
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62 assert x == x_ |
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63 |
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64 def test_digraph2(self): |
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65 G = nx.DiGraph() |
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66 nx.add_path(G, range(4)) |
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67 x = list(edge_bfs(G, [0])) |
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68 x_ = [(0, 1), (1, 2), (2, 3)] |
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69 assert x == x_ |
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70 |
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71 def test_digraph_rev(self): |
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72 G = nx.DiGraph(self.edges) |
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73 x = list(edge_bfs(G, self.nodes, orientation="reverse")) |
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74 x_ = [ |
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75 (1, 0, REVERSE), |
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76 (2, 0, REVERSE), |
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77 (0, 1, REVERSE), |
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78 (2, 1, REVERSE), |
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79 (3, 1, REVERSE), |
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80 ] |
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81 assert x == x_ |
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82 |
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83 def test_digraph_rev2(self): |
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84 G = nx.DiGraph() |
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85 nx.add_path(G, range(4)) |
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86 x = list(edge_bfs(G, [3], orientation="reverse")) |
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87 x_ = [(2, 3, REVERSE), (1, 2, REVERSE), (0, 1, REVERSE)] |
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88 assert x == x_ |
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89 |
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90 def test_multigraph(self): |
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91 G = nx.MultiGraph(self.edges) |
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92 x = list(edge_bfs(G, self.nodes)) |
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93 x_ = [(0, 1, 0), (0, 1, 1), (0, 1, 2), (0, 2, 0), (1, 2, 0), (1, 3, 0)] |
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94 # This is an example of where hash randomization can break. |
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95 # There are 3! * 2 alternative outputs, such as: |
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96 # [(0, 1, 1), (1, 0, 0), (0, 1, 2), (1, 3, 0), (1, 2, 0)] |
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97 # But note, the edges (1,2,0) and (1,3,0) always follow the (0,1,k) |
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98 # edges. So the algorithm only guarantees a partial order. A total |
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99 # order is guaranteed only if the graph data structures are ordered. |
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100 assert x == x_ |
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101 |
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102 def test_multidigraph(self): |
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103 G = nx.MultiDiGraph(self.edges) |
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104 x = list(edge_bfs(G, self.nodes)) |
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105 x_ = [(0, 1, 0), (1, 0, 0), (1, 0, 1), (2, 0, 0), (2, 1, 0), (3, 1, 0)] |
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106 assert x == x_ |
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107 |
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108 def test_multidigraph_rev(self): |
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109 G = nx.MultiDiGraph(self.edges) |
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110 x = list(edge_bfs(G, self.nodes, orientation="reverse")) |
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111 x_ = [ |
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112 (1, 0, 0, REVERSE), |
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113 (1, 0, 1, REVERSE), |
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114 (2, 0, 0, REVERSE), |
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115 (0, 1, 0, REVERSE), |
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116 (2, 1, 0, REVERSE), |
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117 (3, 1, 0, REVERSE), |
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118 ] |
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119 assert x == x_ |
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120 |
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121 def test_digraph_ignore(self): |
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122 G = nx.DiGraph(self.edges) |
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123 x = list(edge_bfs(G, self.nodes, orientation="ignore")) |
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124 x_ = [ |
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125 (0, 1, FORWARD), |
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126 (1, 0, REVERSE), |
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127 (2, 0, REVERSE), |
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128 (2, 1, REVERSE), |
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129 (3, 1, REVERSE), |
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130 ] |
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131 assert x == x_ |
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132 |
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133 def test_digraph_ignore2(self): |
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134 G = nx.DiGraph() |
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135 nx.add_path(G, range(4)) |
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136 x = list(edge_bfs(G, [0], orientation="ignore")) |
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137 x_ = [(0, 1, FORWARD), (1, 2, FORWARD), (2, 3, FORWARD)] |
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138 assert x == x_ |
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139 |
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140 def test_multidigraph_ignore(self): |
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141 G = nx.MultiDiGraph(self.edges) |
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142 x = list(edge_bfs(G, self.nodes, orientation="ignore")) |
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143 x_ = [ |
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144 (0, 1, 0, FORWARD), |
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145 (1, 0, 0, REVERSE), |
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146 (1, 0, 1, REVERSE), |
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147 (2, 0, 0, REVERSE), |
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148 (2, 1, 0, REVERSE), |
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149 (3, 1, 0, REVERSE), |
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150 ] |
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151 assert x == x_ |