Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_filecmp.py @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents bfd53dcb02ff
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import os, filecmp, shutil, tempfile
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2 import unittest
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3 from test import support
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4
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5 class FileCompareTestCase(unittest.TestCase):
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6 def setUp(self):
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7 self.name = support.TESTFN
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8 self.name_same = support.TESTFN + '-same'
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9 self.name_diff = support.TESTFN + '-diff'
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10 data = 'Contents of file go here.\n'
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11 for name in [self.name, self.name_same, self.name_diff]:
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12 output = open(name, 'w')
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13 output.write(data)
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14 output.close()
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15
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16 output = open(self.name_diff, 'a+')
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17 output.write('An extra line.\n')
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18 output.close()
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19 self.dir = tempfile.gettempdir()
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20
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21 def tearDown(self):
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22 os.unlink(self.name)
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23 os.unlink(self.name_same)
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24 os.unlink(self.name_diff)
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25
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26 def test_matching(self):
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27 self.assertTrue(filecmp.cmp(self.name, self.name_same),
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28 "Comparing file to itself fails")
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29 self.assertTrue(filecmp.cmp(self.name, self.name_same, shallow=False),
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30 "Comparing file to itself fails")
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31 self.assertTrue(filecmp.cmp(self.name, self.name, shallow=False),
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32 "Comparing file to identical file fails")
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33 self.assertTrue(filecmp.cmp(self.name, self.name),
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34 "Comparing file to identical file fails")
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35
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36 def test_different(self):
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37 self.assertFalse(filecmp.cmp(self.name, self.name_diff),
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38 "Mismatched files compare as equal")
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39 self.assertFalse(filecmp.cmp(self.name, self.dir),
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40 "File and directory compare as equal")
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41
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42 def test_cache_clear(self):
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43 first_compare = filecmp.cmp(self.name, self.name_same, shallow=False)
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44 second_compare = filecmp.cmp(self.name, self.name_diff, shallow=False)
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45 filecmp.clear_cache()
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46 self.assertTrue(len(filecmp._cache) == 0,
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47 "Cache not cleared after calling clear_cache")
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48
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49 class DirCompareTestCase(unittest.TestCase):
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50 def setUp(self):
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51 tmpdir = tempfile.gettempdir()
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52 self.dir = os.path.join(tmpdir, 'dir')
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53 self.dir_same = os.path.join(tmpdir, 'dir-same')
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54 self.dir_diff = os.path.join(tmpdir, 'dir-diff')
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55
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56 # Another dir is created under dir_same, but it has a name from the
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57 # ignored list so it should not affect testing results.
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58 self.dir_ignored = os.path.join(self.dir_same, '.hg')
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59
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60 self.caseinsensitive = os.path.normcase('A') == os.path.normcase('a')
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61 data = 'Contents of file go here.\n'
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62 for dir in (self.dir, self.dir_same, self.dir_diff, self.dir_ignored):
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63 shutil.rmtree(dir, True)
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64 os.mkdir(dir)
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65 if self.caseinsensitive and dir is self.dir_same:
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66 fn = 'FiLe' # Verify case-insensitive comparison
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67 else:
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68 fn = 'file'
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69 output = open(os.path.join(dir, fn), 'w')
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70 output.write(data)
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71 output.close()
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72
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73 output = open(os.path.join(self.dir_diff, 'file2'), 'w')
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74 output.write('An extra file.\n')
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75 output.close()
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76
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77 def tearDown(self):
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78 for dir in (self.dir, self.dir_same, self.dir_diff):
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79 shutil.rmtree(dir)
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80
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81 def test_default_ignores(self):
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82 self.assertIn('.hg', filecmp.DEFAULT_IGNORES)
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83
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84 def test_cmpfiles(self):
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85 self.assertTrue(filecmp.cmpfiles(self.dir, self.dir, ['file']) ==
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86 (['file'], [], []),
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87 "Comparing directory to itself fails")
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88 self.assertTrue(filecmp.cmpfiles(self.dir, self.dir_same, ['file']) ==
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89 (['file'], [], []),
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90 "Comparing directory to same fails")
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91
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92 # Try it with shallow=False
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93 self.assertTrue(filecmp.cmpfiles(self.dir, self.dir, ['file'],
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94 shallow=False) ==
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95 (['file'], [], []),
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96 "Comparing directory to itself fails")
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97 self.assertTrue(filecmp.cmpfiles(self.dir, self.dir_same, ['file'],
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98 shallow=False),
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99 "Comparing directory to same fails")
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100
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101 # Add different file2
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102 output = open(os.path.join(self.dir, 'file2'), 'w')
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103 output.write('Different contents.\n')
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104 output.close()
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105
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106 self.assertFalse(filecmp.cmpfiles(self.dir, self.dir_same,
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107 ['file', 'file2']) ==
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108 (['file'], ['file2'], []),
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109 "Comparing mismatched directories fails")
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110
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111
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112 def test_dircmp(self):
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113 # Check attributes for comparison of two identical directories
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114 left_dir, right_dir = self.dir, self.dir_same
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115 d = filecmp.dircmp(left_dir, right_dir)
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116 self.assertEqual(d.left, left_dir)
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117 self.assertEqual(d.right, right_dir)
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118 if self.caseinsensitive:
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119 self.assertEqual([d.left_list, d.right_list],[['file'], ['FiLe']])
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120 else:
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121 self.assertEqual([d.left_list, d.right_list],[['file'], ['file']])
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122 self.assertEqual(d.common, ['file'])
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123 self.assertTrue(d.left_only == d.right_only == [])
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124 self.assertEqual(d.same_files, ['file'])
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125 self.assertEqual(d.diff_files, [])
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126
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127 # Check attributes for comparison of two different directories
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128 left_dir, right_dir = self.dir, self.dir_diff
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129 d = filecmp.dircmp(left_dir, right_dir)
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130 self.assertEqual(d.left, left_dir)
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131 self.assertEqual(d.right, right_dir)
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132 self.assertEqual(d.left_list, ['file'])
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133 self.assertTrue(d.right_list == ['file', 'file2'])
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134 self.assertEqual(d.common, ['file'])
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135 self.assertEqual(d.left_only, [])
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136 self.assertEqual(d.right_only, ['file2'])
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137 self.assertEqual(d.same_files, ['file'])
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138 self.assertEqual(d.diff_files, [])
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139
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140 # Add different file2
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141 output = open(os.path.join(self.dir, 'file2'), 'w')
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142 output.write('Different contents.\n')
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143 output.close()
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144 d = filecmp.dircmp(self.dir, self.dir_diff)
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145 self.assertEqual(d.same_files, ['file'])
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146 self.assertEqual(d.diff_files, ['file2'])
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147
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148
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149 def test_main():
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150 support.run_unittest(FileCompareTestCase, DirCompareTestCase)
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151
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152 if __name__ == "__main__":
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153 test_main()