Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/shortest_paths/tests/test_unweighted.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 def validate_grid_path(r, c, s, t, p): |
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5 assert isinstance(p, list) |
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6 assert p[0] == s |
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7 assert p[-1] == t |
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8 s = ((s - 1) // c, (s - 1) % c) |
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9 t = ((t - 1) // c, (t - 1) % c) |
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10 assert len(p) == abs(t[0] - s[0]) + abs(t[1] - s[1]) + 1 |
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11 p = [((u - 1) // c, (u - 1) % c) for u in p] |
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12 for u in p: |
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13 assert 0 <= u[0] < r |
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14 assert 0 <= u[1] < c |
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15 for u, v in zip(p[:-1], p[1:]): |
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16 assert (abs(v[0] - u[0]), abs(v[1] - u[1])) in [(0, 1), (1, 0)] |
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17 |
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18 |
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19 class TestUnweightedPath: |
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20 @classmethod |
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21 def setup_class(cls): |
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22 from networkx import convert_node_labels_to_integers as cnlti |
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23 |
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24 cls.grid = cnlti(nx.grid_2d_graph(4, 4), first_label=1, ordering="sorted") |
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25 cls.cycle = nx.cycle_graph(7) |
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26 cls.directed_cycle = nx.cycle_graph(7, create_using=nx.DiGraph()) |
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27 |
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28 def test_bidirectional_shortest_path(self): |
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29 assert nx.bidirectional_shortest_path(self.cycle, 0, 3) == [0, 1, 2, 3] |
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30 assert nx.bidirectional_shortest_path(self.cycle, 0, 4) == [0, 6, 5, 4] |
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31 validate_grid_path( |
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32 4, 4, 1, 12, nx.bidirectional_shortest_path(self.grid, 1, 12) |
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33 ) |
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34 assert nx.bidirectional_shortest_path(self.directed_cycle, 0, 3) == [0, 1, 2, 3] |
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35 |
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36 def test_shortest_path_length(self): |
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37 assert nx.shortest_path_length(self.cycle, 0, 3) == 3 |
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38 assert nx.shortest_path_length(self.grid, 1, 12) == 5 |
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39 assert nx.shortest_path_length(self.directed_cycle, 0, 4) == 4 |
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40 # now with weights |
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41 assert nx.shortest_path_length(self.cycle, 0, 3, weight=True) == 3 |
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42 assert nx.shortest_path_length(self.grid, 1, 12, weight=True) == 5 |
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43 assert nx.shortest_path_length(self.directed_cycle, 0, 4, weight=True) == 4 |
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44 |
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45 def test_single_source_shortest_path(self): |
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46 p = nx.single_source_shortest_path(self.directed_cycle, 3) |
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47 assert p[0] == [3, 4, 5, 6, 0] |
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48 p = nx.single_source_shortest_path(self.cycle, 0) |
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49 assert p[3] == [0, 1, 2, 3] |
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50 p = nx.single_source_shortest_path(self.cycle, 0, cutoff=0) |
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51 assert p == {0: [0]} |
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52 |
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53 def test_single_source_shortest_path_length(self): |
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54 pl = nx.single_source_shortest_path_length |
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55 lengths = {0: 0, 1: 1, 2: 2, 3: 3, 4: 3, 5: 2, 6: 1} |
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56 assert dict(pl(self.cycle, 0)) == lengths |
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57 lengths = {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6} |
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58 assert dict(pl(self.directed_cycle, 0)) == lengths |
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59 |
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60 def test_single_target_shortest_path(self): |
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61 p = nx.single_target_shortest_path(self.directed_cycle, 0) |
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62 assert p[3] == [3, 4, 5, 6, 0] |
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63 p = nx.single_target_shortest_path(self.cycle, 0) |
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64 assert p[3] == [3, 2, 1, 0] |
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65 p = nx.single_target_shortest_path(self.cycle, 0, cutoff=0) |
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66 assert p == {0: [0]} |
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67 |
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68 def test_single_target_shortest_path_length(self): |
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69 pl = nx.single_target_shortest_path_length |
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70 lengths = {0: 0, 1: 1, 2: 2, 3: 3, 4: 3, 5: 2, 6: 1} |
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71 assert dict(pl(self.cycle, 0)) == lengths |
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72 lengths = {0: 0, 1: 6, 2: 5, 3: 4, 4: 3, 5: 2, 6: 1} |
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73 assert dict(pl(self.directed_cycle, 0)) == lengths |
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74 |
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75 def test_all_pairs_shortest_path(self): |
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76 p = dict(nx.all_pairs_shortest_path(self.cycle)) |
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77 assert p[0][3] == [0, 1, 2, 3] |
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78 p = dict(nx.all_pairs_shortest_path(self.grid)) |
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79 validate_grid_path(4, 4, 1, 12, p[1][12]) |
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80 |
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81 def test_all_pairs_shortest_path_length(self): |
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82 l = dict(nx.all_pairs_shortest_path_length(self.cycle)) |
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83 assert l[0] == {0: 0, 1: 1, 2: 2, 3: 3, 4: 3, 5: 2, 6: 1} |
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84 l = dict(nx.all_pairs_shortest_path_length(self.grid)) |
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85 assert l[1][16] == 6 |
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86 |
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87 def test_predecessor_path(self): |
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88 G = nx.path_graph(4) |
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89 assert nx.predecessor(G, 0) == {0: [], 1: [0], 2: [1], 3: [2]} |
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90 assert nx.predecessor(G, 0, 3) == [2] |
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91 |
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92 def test_predecessor_cycle(self): |
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93 G = nx.cycle_graph(4) |
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94 pred = nx.predecessor(G, 0) |
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95 assert pred[0] == [] |
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96 assert pred[1] == [0] |
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97 assert pred[2] in [[1, 3], [3, 1]] |
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98 assert pred[3] == [0] |
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99 |
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100 def test_predecessor_cutoff(self): |
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101 G = nx.path_graph(4) |
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102 p = nx.predecessor(G, 0, 3) |
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103 assert 4 not in p |
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104 |
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105 def test_predecessor_target(self): |
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106 G = nx.path_graph(4) |
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107 p = nx.predecessor(G, 0, 3) |
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108 assert p == [2] |
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109 p = nx.predecessor(G, 0, 3, cutoff=2) |
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110 assert p == [] |
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111 p, s = nx.predecessor(G, 0, 3, return_seen=True) |
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112 assert p == [2] |
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113 assert s == 3 |
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114 p, s = nx.predecessor(G, 0, 3, cutoff=2, return_seen=True) |
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115 assert p == [] |
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116 assert s == -1 |