Mercurial > hg
annotate tests/test-rust-ancestor.py @ 46113:59fa3890d40a
node: import symbols explicitly
There is no point in lazy importing mercurial.node, it is used all over
the place anyway. So consistently import the used symbols directly.
Fix one file using symbols indirectly via mercurial.revlog.
Differential Revision: https://phab.mercurial-scm.org/D9480
author | Joerg Sonnenberger <joerg@bec.de> |
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date | Tue, 01 Dec 2020 21:54:46 +0100 |
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1 from __future__ import absolute_import |
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2 import sys |
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3 import unittest |
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4 |
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5 from mercurial.node import wdirrev |
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6 from mercurial import error |
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7 |
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8 from mercurial.testing import revlog as revlogtesting |
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9 |
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10 try: |
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11 from mercurial import rustext |
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12 |
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13 rustext.__name__ # trigger immediate actual import |
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14 except ImportError: |
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15 rustext = None |
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16 else: |
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17 # this would fail already without appropriate ancestor.__package__ |
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18 from mercurial.rustext.ancestor import ( |
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19 AncestorsIterator, |
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20 LazyAncestors, |
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21 MissingAncestors, |
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22 ) |
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23 from mercurial.rustext import dagop |
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24 |
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25 try: |
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26 from mercurial.cext import parsers as cparsers |
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27 except ImportError: |
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28 cparsers = None |
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29 |
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30 |
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31 @unittest.skipIf( |
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32 rustext is None, |
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33 'The Rust version of the "ancestor" module is not available. It is needed' |
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34 ' for this test.', |
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35 ) |
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36 @unittest.skipIf( |
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37 rustext is None, |
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38 'The Rust or C version of the "parsers" module, which the "ancestor" module' |
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39 ' relies on, is not available.', |
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40 ) |
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41 class rustancestorstest(revlogtesting.RevlogBasedTestBase): |
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42 """Test the correctness of binding to Rust code. |
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43 |
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44 This test is merely for the binding to Rust itself: extraction of |
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45 Python variable, giving back the results etc. |
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46 |
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47 It is not meant to test the algorithmic correctness of the operations |
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48 on ancestors it provides. Hence the very simple embedded index data is |
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49 good enough. |
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50 |
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51 Algorithmic correctness is asserted by the Rust unit tests. |
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52 """ |
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53 |
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54 def testiteratorrevlist(self): |
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55 idx = self.parseindex() |
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56 # checking test assumption about the index binary data: |
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57 self.assertEqual( |
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58 {i: (r[5], r[6]) for i, r in enumerate(idx)}, |
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59 {0: (-1, -1), 1: (0, -1), 2: (1, -1), 3: (2, -1)}, |
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60 ) |
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61 ait = AncestorsIterator(idx, [3], 0, True) |
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62 self.assertEqual([r for r in ait], [3, 2, 1, 0]) |
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63 |
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64 ait = AncestorsIterator(idx, [3], 0, False) |
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65 self.assertEqual([r for r in ait], [2, 1, 0]) |
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66 |
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67 def testlazyancestors(self): |
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68 idx = self.parseindex() |
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69 start_count = sys.getrefcount(idx) # should be 2 (see Python doc) |
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70 self.assertEqual( |
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71 {i: (r[5], r[6]) for i, r in enumerate(idx)}, |
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72 {0: (-1, -1), 1: (0, -1), 2: (1, -1), 3: (2, -1)}, |
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73 ) |
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74 lazy = LazyAncestors(idx, [3], 0, True) |
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75 # we have two more references to the index: |
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76 # - in its inner iterator for __contains__ and __bool__ |
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77 # - in the LazyAncestors instance itself (to spawn new iterators) |
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78 self.assertEqual(sys.getrefcount(idx), start_count + 2) |
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79 |
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80 self.assertTrue(2 in lazy) |
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81 self.assertTrue(bool(lazy)) |
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82 self.assertEqual(list(lazy), [3, 2, 1, 0]) |
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83 # a second time to validate that we spawn new iterators |
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84 self.assertEqual(list(lazy), [3, 2, 1, 0]) |
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85 |
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86 # now let's watch the refcounts closer |
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87 ait = iter(lazy) |
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88 self.assertEqual(sys.getrefcount(idx), start_count + 3) |
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89 del ait |
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90 self.assertEqual(sys.getrefcount(idx), start_count + 2) |
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91 del lazy |
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92 self.assertEqual(sys.getrefcount(idx), start_count) |
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93 |
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94 # let's check bool for an empty one |
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95 self.assertFalse(LazyAncestors(idx, [0], 0, False)) |
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96 |
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97 def testmissingancestors(self): |
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98 idx = self.parseindex() |
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99 missanc = MissingAncestors(idx, [1]) |
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100 self.assertTrue(missanc.hasbases()) |
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101 self.assertEqual(missanc.missingancestors([3]), [2, 3]) |
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102 missanc.addbases({2}) |
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103 self.assertEqual(missanc.bases(), {1, 2}) |
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104 self.assertEqual(missanc.missingancestors([3]), [3]) |
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105 self.assertEqual(missanc.basesheads(), {2}) |
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106 |
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107 def testmissingancestorsremove(self): |
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108 idx = self.parseindex() |
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109 missanc = MissingAncestors(idx, [1]) |
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110 revs = {0, 1, 2, 3} |
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111 missanc.removeancestorsfrom(revs) |
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112 self.assertEqual(revs, {2, 3}) |
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113 |
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114 def testrefcount(self): |
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115 idx = self.parseindex() |
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116 start_count = sys.getrefcount(idx) |
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117 |
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118 # refcount increases upon iterator init... |
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119 ait = AncestorsIterator(idx, [3], 0, True) |
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120 self.assertEqual(sys.getrefcount(idx), start_count + 1) |
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121 self.assertEqual(next(ait), 3) |
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122 |
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123 # and decreases once the iterator is removed |
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124 del ait |
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125 self.assertEqual(sys.getrefcount(idx), start_count) |
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126 |
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127 # and removing ref to the index after iterator init is no issue |
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128 ait = AncestorsIterator(idx, [3], 0, True) |
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129 del idx |
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130 self.assertEqual(list(ait), [3, 2, 1, 0]) |
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131 |
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132 def testgrapherror(self): |
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133 data = ( |
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134 revlogtesting.data_non_inlined[: 64 + 27] |
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135 + b'\xf2' |
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136 + revlogtesting.data_non_inlined[64 + 28 :] |
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137 ) |
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138 idx = cparsers.parse_index2(data, False)[0] |
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139 with self.assertRaises(rustext.GraphError) as arc: |
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140 AncestorsIterator(idx, [1], -1, False) |
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141 exc = arc.exception |
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142 self.assertIsInstance(exc, ValueError) |
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143 # rust-cpython issues appropriate str instances for Python 2 and 3 |
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144 self.assertEqual(exc.args, ('ParentOutOfRange', 1)) |
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145 |
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146 def testwdirunsupported(self): |
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147 # trying to access ancestors of the working directory raises |
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148 # WdirUnsupported directly |
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149 idx = self.parseindex() |
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150 with self.assertRaises(error.WdirUnsupported): |
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151 list(AncestorsIterator(idx, [wdirrev], -1, False)) |
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152 |
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153 def testheadrevs(self): |
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154 idx = self.parseindex() |
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155 self.assertEqual(dagop.headrevs(idx, [1, 2, 3]), {3}) |
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156 |
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157 |
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158 if __name__ == '__main__': |
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159 import silenttestrunner |
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160 |
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161 silenttestrunner.main(__name__) |