Mercurial > hg
annotate tests/test-rust-ancestor.py @ 51618:ccf5c44092db stable
rust-cpython: don't swallow the dirstate error message
In case we do get a dirstate error, we want to get the full error message and
not just an opaque `Dirstate error`.
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Mon, 06 May 2024 15:30:21 +0200 |
parents | 03fdd4d7b5bd |
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1 import sys |
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2 import unittest |
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3 |
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4 from mercurial.node import wdirrev |
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5 |
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6 from mercurial.testing import revlog as revlogtesting |
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7 |
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8 try: |
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9 from mercurial import rustext |
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10 |
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11 rustext.__name__ # trigger immediate actual import |
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12 except ImportError: |
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13 rustext = None |
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14 else: |
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15 # this would fail already without appropriate ancestor.__package__ |
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16 from mercurial.rustext.ancestor import ( |
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17 AncestorsIterator, |
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18 LazyAncestors, |
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19 MissingAncestors, |
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20 ) |
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21 from mercurial.rustext import dagop |
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22 |
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23 try: |
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24 from mercurial.cext import parsers as cparsers |
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25 except ImportError: |
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26 cparsers = None |
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27 |
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28 |
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29 @unittest.skipIf( |
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30 rustext is None, |
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31 'The Rust version of the "ancestor" module is not available. It is needed' |
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32 ' for this test.', |
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33 ) |
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34 @unittest.skipIf( |
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35 rustext is None, |
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36 'The Rust or C version of the "parsers" module, which the "ancestor" module' |
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37 ' relies on, is not available.', |
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38 ) |
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39 class rustancestorstest(revlogtesting.RustRevlogBasedTestBase): |
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40 """Test the correctness of binding to Rust code. |
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41 |
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42 This test is merely for the binding to Rust itself: extraction of |
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43 Python variable, giving back the results etc. |
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44 |
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45 It is not meant to test the algorithmic correctness of the operations |
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46 on ancestors it provides. Hence the very simple embedded index data is |
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47 good enough. |
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48 |
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49 Algorithmic correctness is asserted by the Rust unit tests. |
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50 """ |
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51 |
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52 def testiteratorrevlist(self): |
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53 idx = self.parserustindex() |
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54 # checking test assumption about the index binary data: |
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55 self.assertEqual( |
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56 {i: (r[5], r[6]) for i, r in enumerate(idx)}, |
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57 {0: (-1, -1), 1: (0, -1), 2: (1, -1), 3: (2, -1)}, |
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58 ) |
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59 ait = AncestorsIterator(idx, [3], 0, True) |
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60 self.assertEqual([r for r in ait], [3, 2, 1, 0]) |
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61 |
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62 ait = AncestorsIterator(idx, [3], 0, False) |
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63 self.assertEqual([r for r in ait], [2, 1, 0]) |
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64 |
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65 def testlazyancestors(self): |
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66 idx = self.parserustindex() |
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67 start_count = sys.getrefcount(idx) # should be 2 (see Python doc) |
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68 self.assertEqual( |
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69 {i: (r[5], r[6]) for i, r in enumerate(idx)}, |
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70 {0: (-1, -1), 1: (0, -1), 2: (1, -1), 3: (2, -1)}, |
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71 ) |
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72 lazy = LazyAncestors(idx, [3], 0, True) |
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73 # we have two more references to the index: |
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74 # - in its inner iterator for __contains__ and __bool__ |
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75 # - in the LazyAncestors instance itself (to spawn new iterators) |
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76 self.assertEqual(sys.getrefcount(idx), start_count + 2) |
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77 |
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78 self.assertTrue(2 in lazy) |
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79 self.assertTrue(bool(lazy)) |
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80 self.assertEqual(list(lazy), [3, 2, 1, 0]) |
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81 # a second time to validate that we spawn new iterators |
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82 self.assertEqual(list(lazy), [3, 2, 1, 0]) |
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83 |
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84 # now let's watch the refcounts closer |
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85 ait = iter(lazy) |
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86 self.assertEqual(sys.getrefcount(idx), start_count + 3) |
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87 del ait |
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88 self.assertEqual(sys.getrefcount(idx), start_count + 2) |
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89 del lazy |
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90 self.assertEqual(sys.getrefcount(idx), start_count) |
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91 |
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92 # let's check bool for an empty one |
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93 self.assertFalse(LazyAncestors(idx, [0], 0, False)) |
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94 |
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95 def testmissingancestors(self): |
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96 idx = self.parserustindex() |
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97 missanc = MissingAncestors(idx, [1]) |
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98 self.assertTrue(missanc.hasbases()) |
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99 self.assertEqual(missanc.missingancestors([3]), [2, 3]) |
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100 missanc.addbases({2}) |
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101 self.assertEqual(missanc.bases(), {1, 2}) |
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102 self.assertEqual(missanc.missingancestors([3]), [3]) |
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103 self.assertEqual(missanc.basesheads(), {2}) |
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104 |
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105 def testmissingancestorsremove(self): |
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106 idx = self.parserustindex() |
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107 missanc = MissingAncestors(idx, [1]) |
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108 revs = {0, 1, 2, 3} |
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109 missanc.removeancestorsfrom(revs) |
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110 self.assertEqual(revs, {2, 3}) |
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111 |
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112 def testrefcount(self): |
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113 idx = self.parserustindex() |
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114 start_count = sys.getrefcount(idx) |
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115 |
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116 # refcount increases upon iterator init... |
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117 ait = AncestorsIterator(idx, [3], 0, True) |
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118 self.assertEqual(sys.getrefcount(idx), start_count + 1) |
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119 self.assertEqual(next(ait), 3) |
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120 |
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121 # and decreases once the iterator is removed |
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122 del ait |
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123 self.assertEqual(sys.getrefcount(idx), start_count) |
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124 |
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125 # and removing ref to the index after iterator init is no issue |
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126 ait = AncestorsIterator(idx, [3], 0, True) |
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127 del idx |
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128 self.assertEqual(list(ait), [3, 2, 1, 0]) |
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129 |
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130 # the index is not tracked by the GC, hence there is nothing more |
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131 # we can assert to check that it is properly deleted once its refcount |
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132 # drops to 0 |
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133 |
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134 def testgrapherror(self): |
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135 data = ( |
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136 revlogtesting.data_non_inlined[: 64 + 27] |
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137 + b'\xf2' |
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138 + revlogtesting.data_non_inlined[64 + 28 :] |
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139 ) |
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140 idx = self.parserustindex(data=data) |
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141 with self.assertRaises(rustext.GraphError) as arc: |
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142 AncestorsIterator(idx, [1], -1, False) |
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143 exc = arc.exception |
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144 self.assertIsInstance(exc, ValueError) |
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145 # rust-cpython issues appropriate str instances for Python 2 and 3 |
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146 self.assertEqual(exc.args, ('ParentOutOfRange', 1)) |
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147 |
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148 def testwdirunsupported(self): |
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149 # trying to access ancestors of the working directory raises |
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150 idx = self.parserustindex() |
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151 with self.assertRaises(rustext.GraphError) as arc: |
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152 list(AncestorsIterator(idx, [wdirrev], -1, False)) |
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153 |
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154 exc = arc.exception |
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155 self.assertIsInstance(exc, ValueError) |
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156 # rust-cpython issues appropriate str instances for Python 2 and 3 |
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157 self.assertEqual(exc.args, ('InvalidRevision', wdirrev)) |
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158 |
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159 def testheadrevs(self): |
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160 idx = self.parserustindex() |
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161 self.assertEqual(dagop.headrevs(idx, [1, 2, 3]), {3}) |
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162 |
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163 |
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164 if __name__ == '__main__': |
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165 import silenttestrunner |
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166 |
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167 silenttestrunner.main(__name__) |