Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/traversal/tests/test_dfs.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 networkx as nx |
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2 |
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3 |
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4 class TestDFS: |
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5 @classmethod |
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6 def setup_class(cls): |
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7 # simple graph |
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8 G = nx.Graph() |
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9 G.add_edges_from([(0, 1), (1, 2), (1, 3), (2, 4), (3, 4)]) |
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10 cls.G = G |
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11 # simple graph, disconnected |
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12 D = nx.Graph() |
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13 D.add_edges_from([(0, 1), (2, 3)]) |
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14 cls.D = D |
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15 |
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16 def test_preorder_nodes(self): |
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17 assert list(nx.dfs_preorder_nodes(self.G, source=0)) == [0, 1, 2, 4, 3] |
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18 assert list(nx.dfs_preorder_nodes(self.D)) == [0, 1, 2, 3] |
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19 |
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20 def test_postorder_nodes(self): |
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21 assert list(nx.dfs_postorder_nodes(self.G, source=0)) == [3, 4, 2, 1, 0] |
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22 assert list(nx.dfs_postorder_nodes(self.D)) == [1, 0, 3, 2] |
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23 |
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24 def test_successor(self): |
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25 assert nx.dfs_successors(self.G, source=0) == {0: [1], 1: [2], 2: [4], 4: [3]} |
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26 assert nx.dfs_successors(self.D) == {0: [1], 2: [3]} |
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27 |
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28 def test_predecessor(self): |
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29 assert nx.dfs_predecessors(self.G, source=0) == {1: 0, 2: 1, 3: 4, 4: 2} |
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30 assert nx.dfs_predecessors(self.D) == {1: 0, 3: 2} |
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31 |
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32 def test_dfs_tree(self): |
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33 exp_nodes = sorted(self.G.nodes()) |
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34 exp_edges = [(0, 1), (1, 2), (2, 4), (4, 3)] |
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35 # Search from first node |
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36 T = nx.dfs_tree(self.G, source=0) |
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37 assert sorted(T.nodes()) == exp_nodes |
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38 assert sorted(T.edges()) == exp_edges |
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39 # Check source=None |
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40 T = nx.dfs_tree(self.G, source=None) |
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41 assert sorted(T.nodes()) == exp_nodes |
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42 assert sorted(T.edges()) == exp_edges |
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43 # Check source=None is the default |
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44 T = nx.dfs_tree(self.G) |
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45 assert sorted(T.nodes()) == exp_nodes |
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46 assert sorted(T.edges()) == exp_edges |
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47 |
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48 def test_dfs_edges(self): |
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49 edges = nx.dfs_edges(self.G, source=0) |
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50 assert list(edges) == [(0, 1), (1, 2), (2, 4), (4, 3)] |
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51 edges = nx.dfs_edges(self.D) |
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52 assert list(edges) == [(0, 1), (2, 3)] |
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53 |
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54 def test_dfs_labeled_edges(self): |
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55 edges = list(nx.dfs_labeled_edges(self.G, source=0)) |
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56 forward = [(u, v) for (u, v, d) in edges if d == "forward"] |
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57 assert forward == [(0, 0), (0, 1), (1, 2), (2, 4), (4, 3)] |
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58 |
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59 def test_dfs_labeled_disconnected_edges(self): |
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60 edges = list(nx.dfs_labeled_edges(self.D)) |
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61 forward = [(u, v) for (u, v, d) in edges if d == "forward"] |
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62 assert forward == [(0, 0), (0, 1), (2, 2), (2, 3)] |
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63 |
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64 def test_dfs_tree_isolates(self): |
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65 G = nx.Graph() |
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66 G.add_node(1) |
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67 G.add_node(2) |
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68 T = nx.dfs_tree(G, source=1) |
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69 assert sorted(T.nodes()) == [1] |
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70 assert sorted(T.edges()) == [] |
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71 T = nx.dfs_tree(G, source=None) |
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72 assert sorted(T.nodes()) == [1, 2] |
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73 assert sorted(T.edges()) == [] |
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74 |
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75 |
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76 class TestDepthLimitedSearch: |
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77 @classmethod |
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78 def setup_class(cls): |
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79 # a tree |
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80 G = nx.Graph() |
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81 nx.add_path(G, [0, 1, 2, 3, 4, 5, 6]) |
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82 nx.add_path(G, [2, 7, 8, 9, 10]) |
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83 cls.G = G |
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84 # a disconnected graph |
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85 D = nx.Graph() |
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86 D.add_edges_from([(0, 1), (2, 3)]) |
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87 nx.add_path(D, [2, 7, 8, 9, 10]) |
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88 cls.D = D |
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89 |
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90 def test_dls_preorder_nodes(self): |
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91 assert list(nx.dfs_preorder_nodes(self.G, source=0, depth_limit=2)) == [0, 1, 2] |
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92 assert list(nx.dfs_preorder_nodes(self.D, source=1, depth_limit=2)) == ([1, 0]) |
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93 |
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94 def test_dls_postorder_nodes(self): |
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95 assert list(nx.dfs_postorder_nodes(self.G, source=3, depth_limit=3)) == [ |
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96 1, |
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97 7, |
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98 2, |
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99 5, |
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100 4, |
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101 3, |
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102 ] |
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103 assert list(nx.dfs_postorder_nodes(self.D, source=2, depth_limit=2)) == ( |
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104 [3, 7, 2] |
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105 ) |
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106 |
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107 def test_dls_successor(self): |
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108 result = nx.dfs_successors(self.G, source=4, depth_limit=3) |
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109 assert {n: set(v) for n, v in result.items()} == { |
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110 2: {1, 7}, |
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111 3: {2}, |
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112 4: {3, 5}, |
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113 5: {6}, |
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114 } |
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115 result = nx.dfs_successors(self.D, source=7, depth_limit=2) |
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116 assert {n: set(v) for n, v in result.items()} == {8: {9}, 2: {3}, 7: {8, 2}} |
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117 |
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118 def test_dls_predecessor(self): |
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119 assert nx.dfs_predecessors(self.G, source=0, depth_limit=3) == { |
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120 1: 0, |
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121 2: 1, |
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122 3: 2, |
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123 7: 2, |
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124 } |
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125 assert nx.dfs_predecessors(self.D, source=2, depth_limit=3) == { |
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126 8: 7, |
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127 9: 8, |
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128 3: 2, |
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129 7: 2, |
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130 } |
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131 |
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132 def test_dls_tree(self): |
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133 T = nx.dfs_tree(self.G, source=3, depth_limit=1) |
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134 assert sorted(T.edges()) == [(3, 2), (3, 4)] |
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135 |
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136 def test_dls_edges(self): |
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137 edges = nx.dfs_edges(self.G, source=9, depth_limit=4) |
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138 assert list(edges) == [(9, 8), (8, 7), (7, 2), (2, 1), (2, 3), (9, 10)] |
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139 |
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140 def test_dls_labeled_edges(self): |
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141 edges = list(nx.dfs_labeled_edges(self.G, source=5, depth_limit=1)) |
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142 forward = [(u, v) for (u, v, d) in edges if d == "forward"] |
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143 assert forward == [(5, 5), (5, 4), (5, 6)] |
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144 |
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145 def test_dls_labeled_disconnected_edges(self): |
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146 edges = list(nx.dfs_labeled_edges(self.G, source=6, depth_limit=2)) |
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147 forward = [(u, v) for (u, v, d) in edges if d == "forward"] |
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148 assert forward == [(6, 6), (6, 5), (5, 4)] |