Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/utils/tests/test_heaps.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 from networkx.utils import BinaryHeap, PairingHeap |
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4 |
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5 |
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6 class X: |
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7 def __eq__(self, other): |
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8 raise self is other |
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9 |
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10 def __ne__(self, other): |
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11 raise self is not other |
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12 |
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13 def __lt__(self, other): |
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14 raise TypeError("cannot compare") |
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15 |
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16 def __le__(self, other): |
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17 raise TypeError("cannot compare") |
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18 |
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19 def __ge__(self, other): |
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20 raise TypeError("cannot compare") |
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21 |
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22 def __gt__(self, other): |
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23 raise TypeError("cannot compare") |
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24 |
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25 def __hash__(self): |
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26 return hash(id(self)) |
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27 |
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28 |
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29 x = X() |
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30 |
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31 |
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32 data = [ # min should not invent an element. |
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33 ("min", nx.NetworkXError), |
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34 # Popping an empty heap should fail. |
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35 ("pop", nx.NetworkXError), |
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36 # Getting nonexisting elements should return None. |
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37 ("get", 0, None), |
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38 ("get", x, None), |
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39 ("get", None, None), |
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40 # Inserting a new key should succeed. |
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41 ("insert", x, 1, True), |
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42 ("get", x, 1), |
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43 ("min", (x, 1)), |
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44 # min should not pop the top element. |
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45 ("min", (x, 1)), |
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46 # Inserting a new key of different type should succeed. |
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47 ("insert", 1, -2.0, True), |
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48 # int and float values should interop. |
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49 ("min", (1, -2.0)), |
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50 # pop removes minimum-valued element. |
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51 ("insert", 3, -(10 ** 100), True), |
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52 ("insert", 4, 5, True), |
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53 ("pop", (3, -(10 ** 100))), |
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54 ("pop", (1, -2.0)), |
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55 # Decrease-insert should succeed. |
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56 ("insert", 4, -50, True), |
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57 ("insert", 4, -60, False, True), |
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58 # Decrease-insert should not create duplicate keys. |
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59 ("pop", (4, -60)), |
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60 ("pop", (x, 1)), |
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61 # Popping all elements should empty the heap. |
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62 ("min", nx.NetworkXError), |
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63 ("pop", nx.NetworkXError), |
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64 # Non-value-changing insert should fail. |
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65 ("insert", x, 0, True), |
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66 ("insert", x, 0, False, False), |
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67 ("min", (x, 0)), |
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68 ("insert", x, 0, True, False), |
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69 ("min", (x, 0)), |
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70 # Failed insert should not create duplicate keys. |
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71 ("pop", (x, 0)), |
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72 ("pop", nx.NetworkXError), |
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73 # Increase-insert should succeed when allowed. |
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74 ("insert", None, 0, True), |
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75 ("insert", 2, -1, True), |
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76 ("min", (2, -1)), |
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77 ("insert", 2, 1, True, False), |
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78 ("min", (None, 0)), |
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79 # Increase-insert should fail when disallowed. |
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80 ("insert", None, 2, False, False), |
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81 ("min", (None, 0)), |
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82 # Failed increase-insert should not create duplicate keys. |
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83 ("pop", (None, 0)), |
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84 ("pop", (2, 1)), |
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85 ("min", nx.NetworkXError), |
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86 ("pop", nx.NetworkXError), |
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87 ] |
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88 |
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89 |
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90 def _test_heap_class(cls, *args, **kwargs): |
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91 heap = cls(*args, **kwargs) |
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92 # Basic behavioral test |
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93 for op in data: |
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94 if op[-1] is not nx.NetworkXError: |
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95 assert op[-1] == getattr(heap, op[0])(*op[1:-1]) |
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96 else: |
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97 pytest.raises(op[-1], getattr(heap, op[0]), *op[1:-1]) |
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98 # Coverage test. |
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99 for i in range(99, -1, -1): |
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100 assert heap.insert(i, i) |
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101 for i in range(50): |
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102 assert heap.pop() == (i, i) |
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103 for i in range(100): |
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104 assert heap.insert(i, i) == (i < 50) |
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105 for i in range(100): |
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106 assert not heap.insert(i, i + 1) |
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107 for i in range(50): |
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108 assert heap.pop() == (i, i) |
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109 for i in range(100): |
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110 assert heap.insert(i, i + 1) == (i < 50) |
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111 for i in range(49): |
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112 assert heap.pop() == (i, i + 1) |
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113 assert sorted([heap.pop(), heap.pop()]) == [(49, 50), (50, 50)] |
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114 for i in range(51, 100): |
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115 assert not heap.insert(i, i + 1, True) |
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116 for i in range(51, 70): |
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117 assert heap.pop() == (i, i + 1) |
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118 for i in range(100): |
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119 assert heap.insert(i, i) |
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120 for i in range(100): |
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121 assert heap.pop() == (i, i) |
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122 pytest.raises(nx.NetworkXError, heap.pop) |
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123 |
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124 |
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125 def test_PairingHeap(): |
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126 _test_heap_class(PairingHeap) |
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127 |
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128 |
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129 def test_BinaryHeap(): |
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130 _test_heap_class(BinaryHeap) |