Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_support.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 1cbd3d9f7d61
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python
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2
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3 import importlib
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4 import shutil
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5 import sys
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6 import os
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7 import unittest
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8 import socket
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9 import tempfile
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10 import errno
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11 from test import support
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12
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13 TESTFN = support.TESTFN
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14 TESTDIRN = os.path.basename(tempfile.mkdtemp(dir='.'))
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15
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16
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17 class TestSupport(unittest.TestCase):
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18 def setUp(self):
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19 support.unlink(TESTFN)
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20 support.rmtree(TESTDIRN)
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21 tearDown = setUp
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22
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23 def test_import_module(self):
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24 support.import_module("ftplib")
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25 self.assertRaises(unittest.SkipTest, support.import_module, "foo")
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26
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27 def test_import_fresh_module(self):
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28 support.import_fresh_module("ftplib")
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29
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30 def test_get_attribute(self):
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31 self.assertEqual(support.get_attribute(self, "test_get_attribute"),
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32 self.test_get_attribute)
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33 self.assertRaises(unittest.SkipTest, support.get_attribute, self, "foo")
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34
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35 @unittest.skip("failing buildbots")
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36 def test_get_original_stdout(self):
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37 self.assertEqual(support.get_original_stdout(), sys.stdout)
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38
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39 def test_unload(self):
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40 import sched
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41 self.assertIn("sched", sys.modules)
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42 support.unload("sched")
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43 self.assertNotIn("sched", sys.modules)
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44
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45 def test_unlink(self):
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46 with open(TESTFN, "w") as f:
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47 pass
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48 support.unlink(TESTFN)
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49 self.assertFalse(os.path.exists(TESTFN))
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50 support.unlink(TESTFN)
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51
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52 def test_rmtree(self):
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53 os.mkdir(TESTDIRN)
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54 os.mkdir(os.path.join(TESTDIRN, TESTDIRN))
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55 support.rmtree(TESTDIRN)
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56 self.assertFalse(os.path.exists(TESTDIRN))
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57 support.rmtree(TESTDIRN)
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58
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59 def test_forget(self):
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60 mod_filename = TESTFN + '.py'
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61 with open(mod_filename, 'w') as f:
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62 print('foo = 1', file=f)
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63 sys.path.insert(0, os.curdir)
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64 importlib.invalidate_caches()
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65 try:
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66 mod = __import__(TESTFN)
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67 self.assertIn(TESTFN, sys.modules)
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68
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69 support.forget(TESTFN)
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70 self.assertNotIn(TESTFN, sys.modules)
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71 finally:
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72 del sys.path[0]
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73 support.unlink(mod_filename)
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74
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75 def test_HOST(self):
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76 s = socket.socket()
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77 s.bind((support.HOST, 0))
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78 s.close()
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79
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80 def test_find_unused_port(self):
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81 port = support.find_unused_port()
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82 s = socket.socket()
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83 s.bind((support.HOST, port))
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84 s.close()
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85
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86 def test_bind_port(self):
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87 s = socket.socket()
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88 support.bind_port(s)
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89 s.listen(1)
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90 s.close()
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91
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92 # Tests for temp_dir()
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93
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94 def test_temp_dir(self):
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95 """Test that temp_dir() creates and destroys its directory."""
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96 parent_dir = tempfile.mkdtemp()
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97 parent_dir = os.path.realpath(parent_dir)
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98
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99 try:
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100 path = os.path.join(parent_dir, 'temp')
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101 self.assertFalse(os.path.isdir(path))
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102 with support.temp_dir(path) as temp_path:
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103 self.assertEqual(temp_path, path)
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104 self.assertTrue(os.path.isdir(path))
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105 self.assertFalse(os.path.isdir(path))
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106 finally:
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107 shutil.rmtree(parent_dir)
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108
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109 def test_temp_dir__path_none(self):
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110 """Test passing no path."""
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111 with support.temp_dir() as temp_path:
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112 self.assertTrue(os.path.isdir(temp_path))
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113 self.assertFalse(os.path.isdir(temp_path))
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114
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115 def test_temp_dir__existing_dir__quiet_default(self):
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116 """Test passing a directory that already exists."""
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117 def call_temp_dir(path):
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118 with support.temp_dir(path) as temp_path:
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119 raise Exception("should not get here")
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120
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121 path = tempfile.mkdtemp()
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122 path = os.path.realpath(path)
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123 try:
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124 self.assertTrue(os.path.isdir(path))
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125 self.assertRaises(FileExistsError, call_temp_dir, path)
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126 # Make sure temp_dir did not delete the original directory.
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127 self.assertTrue(os.path.isdir(path))
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128 finally:
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129 shutil.rmtree(path)
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130
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131 def test_temp_dir__existing_dir__quiet_true(self):
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132 """Test passing a directory that already exists with quiet=True."""
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133 path = tempfile.mkdtemp()
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134 path = os.path.realpath(path)
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135
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136 try:
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137 with support.check_warnings() as recorder:
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138 with support.temp_dir(path, quiet=True) as temp_path:
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139 self.assertEqual(path, temp_path)
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140 warnings = [str(w.message) for w in recorder.warnings]
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141 # Make sure temp_dir did not delete the original directory.
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142 self.assertTrue(os.path.isdir(path))
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143 finally:
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144 shutil.rmtree(path)
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145
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146 expected = ['tests may fail, unable to create temp dir: ' + path]
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147 self.assertEqual(warnings, expected)
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148
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149 # Tests for change_cwd()
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150
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151 def test_change_cwd(self):
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152 original_cwd = os.getcwd()
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153
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154 with support.temp_dir() as temp_path:
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155 with support.change_cwd(temp_path) as new_cwd:
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156 self.assertEqual(new_cwd, temp_path)
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157 self.assertEqual(os.getcwd(), new_cwd)
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158
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159 self.assertEqual(os.getcwd(), original_cwd)
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160
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161 def test_change_cwd__non_existent_dir(self):
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162 """Test passing a non-existent directory."""
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163 original_cwd = os.getcwd()
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164
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165 def call_change_cwd(path):
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166 with support.change_cwd(path) as new_cwd:
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167 raise Exception("should not get here")
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168
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169 with support.temp_dir() as parent_dir:
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170 non_existent_dir = os.path.join(parent_dir, 'does_not_exist')
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171 self.assertRaises(FileNotFoundError, call_change_cwd,
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172 non_existent_dir)
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173
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174 self.assertEqual(os.getcwd(), original_cwd)
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175
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176 def test_change_cwd__non_existent_dir__quiet_true(self):
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177 """Test passing a non-existent directory with quiet=True."""
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178 original_cwd = os.getcwd()
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179
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180 with support.temp_dir() as parent_dir:
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181 bad_dir = os.path.join(parent_dir, 'does_not_exist')
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182 with support.check_warnings() as recorder:
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183 with support.change_cwd(bad_dir, quiet=True) as new_cwd:
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184 self.assertEqual(new_cwd, original_cwd)
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185 self.assertEqual(os.getcwd(), new_cwd)
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186 warnings = [str(w.message) for w in recorder.warnings]
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187
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188 expected = ['tests may fail, unable to change CWD to: ' + bad_dir]
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189 self.assertEqual(warnings, expected)
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190
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191 # Tests for change_cwd()
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192
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193 def test_change_cwd__chdir_warning(self):
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194 """Check the warning message when os.chdir() fails."""
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195 path = TESTFN + '_does_not_exist'
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196 with support.check_warnings() as recorder:
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197 with support.change_cwd(path=path, quiet=True):
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198 pass
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199 messages = [str(w.message) for w in recorder.warnings]
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200 self.assertEqual(messages, ['tests may fail, unable to change CWD to: ' + path])
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201
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202 # Tests for temp_cwd()
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203
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204 def test_temp_cwd(self):
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205 here = os.getcwd()
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206 with support.temp_cwd(name=TESTFN):
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207 self.assertEqual(os.path.basename(os.getcwd()), TESTFN)
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208 self.assertFalse(os.path.exists(TESTFN))
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209 self.assertTrue(os.path.basename(os.getcwd()), here)
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210
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211
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212 def test_temp_cwd__name_none(self):
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213 """Test passing None to temp_cwd()."""
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214 original_cwd = os.getcwd()
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215 with support.temp_cwd(name=None) as new_cwd:
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216 self.assertNotEqual(new_cwd, original_cwd)
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217 self.assertTrue(os.path.isdir(new_cwd))
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218 self.assertEqual(os.getcwd(), new_cwd)
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219 self.assertEqual(os.getcwd(), original_cwd)
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220
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221 def test_sortdict(self):
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222 self.assertEqual(support.sortdict({3:3, 2:2, 1:1}), "{1: 1, 2: 2, 3: 3}")
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223
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224 def test_make_bad_fd(self):
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225 fd = support.make_bad_fd()
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226 with self.assertRaises(OSError) as cm:
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227 os.write(fd, b"foo")
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228 self.assertEqual(cm.exception.errno, errno.EBADF)
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229
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230 def test_check_syntax_error(self):
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231 support.check_syntax_error(self, "def class")
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232 self.assertRaises(AssertionError, support.check_syntax_error, self, "1")
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233
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234 def test_CleanImport(self):
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235 import importlib
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236 with support.CleanImport("asyncore"):
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237 importlib.import_module("asyncore")
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238
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239 def test_DirsOnSysPath(self):
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240 with support.DirsOnSysPath('foo', 'bar'):
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241 self.assertIn("foo", sys.path)
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242 self.assertIn("bar", sys.path)
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243 self.assertNotIn("foo", sys.path)
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244 self.assertNotIn("bar", sys.path)
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245
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246 def test_captured_stdout(self):
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247 with support.captured_stdout() as stdout:
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248 print("hello")
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249 self.assertEqual(stdout.getvalue(), "hello\n")
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250
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251 def test_captured_stderr(self):
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252 with support.captured_stderr() as stderr:
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253 print("hello", file=sys.stderr)
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254 self.assertEqual(stderr.getvalue(), "hello\n")
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255
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256 def test_captured_stdin(self):
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257 with support.captured_stdin() as stdin:
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258 stdin.write('hello\n')
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259 stdin.seek(0)
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260 # call test code that consumes from sys.stdin
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261 captured = input()
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262 self.assertEqual(captured, "hello")
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263
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264 def test_gc_collect(self):
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265 support.gc_collect()
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266
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267 def test_python_is_optimized(self):
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268 self.assertIsInstance(support.python_is_optimized(), bool)
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269
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270 def test_swap_attr(self):
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271 class Obj:
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272 x = 1
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273 obj = Obj()
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274 with support.swap_attr(obj, "x", 5):
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275 self.assertEqual(obj.x, 5)
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276 self.assertEqual(obj.x, 1)
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277
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278 def test_swap_item(self):
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279 D = {"item":1}
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280 with support.swap_item(D, "item", 5):
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281 self.assertEqual(D["item"], 5)
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282 self.assertEqual(D["item"], 1)
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283
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284 # XXX -follows a list of untested API
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285 # make_legacy_pyc
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286 # is_resource_enabled
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287 # requires
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288 # fcmp
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289 # umaks
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290 # findfile
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291 # check_warnings
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292 # EnvironmentVarGuard
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293 # TransientResource
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294 # transient_internet
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295 # run_with_locale
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296 # set_memlimit
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297 # bigmemtest
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298 # precisionbigmemtest
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299 # bigaddrspacetest
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300 # requires_resource
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301 # run_doctest
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302 # threading_cleanup
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303 # reap_threads
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304 # reap_children
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305 # strip_python_stderr
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306 # args_from_interpreter_flags
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307 # can_symlink
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308 # skip_unless_symlink
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309 # SuppressCrashReport
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310
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311
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312 def test_main():
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313 tests = [TestSupport]
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314 support.run_unittest(*tests)
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315
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316 if __name__ == '__main__':
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317 test_main()