Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/components/tests/test_connected.py @ 0:4f3585e2f14b draft default tip
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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 from networkx import convert_node_labels_to_integers as cnlti |
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4 from networkx import NetworkXNotImplemented |
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5 |
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6 |
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7 class TestConnected: |
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8 @classmethod |
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9 def setup_class(cls): |
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10 G1 = cnlti(nx.grid_2d_graph(2, 2), first_label=0, ordering="sorted") |
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11 G2 = cnlti(nx.lollipop_graph(3, 3), first_label=4, ordering="sorted") |
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12 G3 = cnlti(nx.house_graph(), first_label=10, ordering="sorted") |
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13 cls.G = nx.union(G1, G2) |
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14 cls.G = nx.union(cls.G, G3) |
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15 cls.DG = nx.DiGraph([(1, 2), (1, 3), (2, 3)]) |
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16 cls.grid = cnlti(nx.grid_2d_graph(4, 4), first_label=1) |
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17 |
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18 cls.gc = [] |
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19 G = nx.DiGraph() |
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20 G.add_edges_from( |
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21 [ |
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22 (1, 2), |
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23 (2, 3), |
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24 (2, 8), |
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25 (3, 4), |
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26 (3, 7), |
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27 (4, 5), |
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28 (5, 3), |
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29 (5, 6), |
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30 (7, 4), |
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31 (7, 6), |
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32 (8, 1), |
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33 (8, 7), |
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34 ] |
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35 ) |
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36 C = [[3, 4, 5, 7], [1, 2, 8], [6]] |
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37 cls.gc.append((G, C)) |
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38 |
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39 G = nx.DiGraph() |
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40 G.add_edges_from([(1, 2), (1, 3), (1, 4), (4, 2), (3, 4), (2, 3)]) |
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41 C = [[2, 3, 4], [1]] |
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42 cls.gc.append((G, C)) |
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43 |
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44 G = nx.DiGraph() |
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45 G.add_edges_from([(1, 2), (2, 3), (3, 2), (2, 1)]) |
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46 C = [[1, 2, 3]] |
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47 cls.gc.append((G, C)) |
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48 |
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49 # Eppstein's tests |
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50 G = nx.DiGraph({0: [1], 1: [2, 3], 2: [4, 5], 3: [4, 5], 4: [6], 5: [], 6: []}) |
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51 C = [[0], [1], [2], [3], [4], [5], [6]] |
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52 cls.gc.append((G, C)) |
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53 |
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54 G = nx.DiGraph({0: [1], 1: [2, 3, 4], 2: [0, 3], 3: [4], 4: [3]}) |
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55 C = [[0, 1, 2], [3, 4]] |
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56 cls.gc.append((G, C)) |
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57 |
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58 G = nx.DiGraph() |
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59 C = [] |
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60 cls.gc.append((G, C)) |
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61 |
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62 def test_connected_components(self): |
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63 cc = nx.connected_components |
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64 G = self.G |
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65 C = { |
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66 frozenset([0, 1, 2, 3]), |
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67 frozenset([4, 5, 6, 7, 8, 9]), |
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68 frozenset([10, 11, 12, 13, 14]), |
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69 } |
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70 assert {frozenset(g) for g in cc(G)} == C |
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71 |
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72 def test_number_connected_components(self): |
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73 ncc = nx.number_connected_components |
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74 assert ncc(self.G) == 3 |
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75 |
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76 def test_number_connected_components2(self): |
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77 ncc = nx.number_connected_components |
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78 assert ncc(self.grid) == 1 |
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79 |
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80 def test_connected_components2(self): |
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81 cc = nx.connected_components |
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82 G = self.grid |
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83 C = {frozenset([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16])} |
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84 assert {frozenset(g) for g in cc(G)} == C |
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85 |
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86 def test_node_connected_components(self): |
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87 ncc = nx.node_connected_component |
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88 G = self.grid |
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89 C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16} |
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90 assert ncc(G, 1) == C |
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91 |
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92 def test_is_connected(self): |
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93 assert nx.is_connected(self.grid) |
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94 G = nx.Graph() |
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95 G.add_nodes_from([1, 2]) |
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96 assert not nx.is_connected(G) |
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97 |
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98 def test_connected_raise(self): |
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99 pytest.raises(NetworkXNotImplemented, nx.connected_components, self.DG) |
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100 pytest.raises(NetworkXNotImplemented, nx.number_connected_components, self.DG) |
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101 pytest.raises(NetworkXNotImplemented, nx.node_connected_component, self.DG, 1) |
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102 pytest.raises(NetworkXNotImplemented, nx.is_connected, self.DG) |
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103 pytest.raises(nx.NetworkXPointlessConcept, nx.is_connected, nx.Graph()) |
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104 |
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105 def test_connected_mutability(self): |
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106 G = self.grid |
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107 seen = set() |
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108 for component in nx.connected_components(G): |
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109 assert len(seen & component) == 0 |
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110 seen.update(component) |
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111 component.clear() |