Mercurial > public > mercurial-scm > hg-stable

annotate tests/test-filecache.py @ 31261:34d57ddaf9f2

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vfs: use 'vfs' module directly in 'test-filecache' Now that the 'vfs' classes moved in their own module, lets use the new module directly. We update code iteratively to help with possible bisect needs in the future.
author Pierre-Yves David <pierre-yves.david@ens-lyon.org>
date Thu, 02 Mar 2017 13:33:28 +0100
parents 21fa3d3688f3
children 74cbbd5420ba
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 from __future__ import absolute_import, print_function
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2 import os
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3 import subprocess
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4 import sys
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5
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6 if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'],
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7 'cacheable']):
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8 sys.exit(80)
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9
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10 from mercurial import (
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11 extensions,
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12 hg,
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13 scmutil,
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14 ui as uimod,
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15 util,
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16 vfs as vfsmod,
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17 )
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18
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19 filecache = scmutil.filecache
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20
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21 class fakerepo(object):
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22 def __init__(self):
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23 self._filecache = {}
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24
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25 def join(self, p):
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26 return p
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27
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28 def sjoin(self, p):
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29 return p
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30
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31 @filecache('x', 'y')
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32 def cached(self):
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33 print('creating')
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34 return 'string from function'
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35
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36 def invalidate(self):
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37 for k in self._filecache:
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38 try:
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39 delattr(self, k)
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40 except AttributeError:
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41 pass
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42
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43 def basic(repo):
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44 print("* neither file exists")
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45 # calls function
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46 repo.cached
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47
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48 repo.invalidate()
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49 print("* neither file still exists")
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50 # uses cache
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51 repo.cached
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52
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53 # create empty file
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54 f = open('x', 'w')
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55 f.close()
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56 repo.invalidate()
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57 print("* empty file x created")
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58 # should recreate the object
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59 repo.cached
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60
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61 f = open('x', 'w')
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62 f.write('a')
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63 f.close()
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64 repo.invalidate()
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65 print("* file x changed size")
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66 # should recreate the object
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67 repo.cached
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68
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69 repo.invalidate()
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70 print("* nothing changed with either file")
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71 # stats file again, reuses object
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72 repo.cached
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73
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74 # atomic replace file, size doesn't change
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75 # hopefully st_mtime doesn't change as well so this doesn't use the cache
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76 # because of inode change
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77 f = vfsmod.vfs('.')('x', 'w', atomictemp=True)
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78 f.write('b')
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79 f.close()
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80
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81 repo.invalidate()
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82 print("* file x changed inode")
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83 repo.cached
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84
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85 # create empty file y
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86 f = open('y', 'w')
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87 f.close()
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88 repo.invalidate()
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89 print("* empty file y created")
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90 # should recreate the object
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91 repo.cached
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92
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93 f = open('y', 'w')
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94 f.write('A')
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95 f.close()
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96 repo.invalidate()
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97 print("* file y changed size")
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98 # should recreate the object
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99 repo.cached
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100
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101 f = vfsmod.vfs('.')('y', 'w', atomictemp=True)
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102 f.write('B')
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103 f.close()
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104
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105 repo.invalidate()
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106 print("* file y changed inode")
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107 repo.cached
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108
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109 f = vfsmod.vfs('.')('x', 'w', atomictemp=True)
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110 f.write('c')
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111 f.close()
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112 f = vfsmod.vfs('.')('y', 'w', atomictemp=True)
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113 f.write('C')
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114 f.close()
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115
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116 repo.invalidate()
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117 print("* both files changed inode")
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118 repo.cached
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119
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120 def fakeuncacheable():
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121 def wrapcacheable(orig, *args, **kwargs):
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122 return False
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123
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124 def wrapinit(orig, *args, **kwargs):
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125 pass
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126
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127 originit = extensions.wrapfunction(util.cachestat, '__init__', wrapinit)
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128 origcacheable = extensions.wrapfunction(util.cachestat, 'cacheable',
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129 wrapcacheable)
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130
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131 for fn in ['x', 'y']:
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132 try:
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133 os.remove(fn)
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134 except OSError:
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135 pass
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136
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137 basic(fakerepo())
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138
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139 util.cachestat.cacheable = origcacheable
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140 util.cachestat.__init__ = originit
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141
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142 def test_filecache_synced():
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143 # test old behavior that caused filecached properties to go out of sync
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144 os.system('hg init && echo a >> a && hg ci -qAm.')
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145 repo = hg.repository(uimod.ui.load())
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146 # first rollback clears the filecache, but changelog to stays in __dict__
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147 repo.rollback()
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148 repo.commit('.')
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149 # second rollback comes along and touches the changelog externally
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150 # (file is moved)
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151 repo.rollback()
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152 # but since changelog isn't under the filecache control anymore, we don't
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153 # see that it changed, and return the old changelog without reconstructing
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154 # it
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155 repo.commit('.')
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156
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157 def setbeforeget(repo):
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158 os.remove('x')
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159 os.remove('y')
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ed80cecdfc57 test-filecache.py: make setbeforeget test clearer
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160 repo.cached = 'string set externally'
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161 repo.invalidate()
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162 print("* neither file exists")
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163 print(repo.cached)
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164 repo.invalidate()
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165 f = open('x', 'w')
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166 f.write('a')
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167 f.close()
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168 print("* file x created")
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169 print(repo.cached)
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170
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171 repo.cached = 'string 2 set externally'
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172 repo.invalidate()
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173 print("* string set externally again")
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174 print(repo.cached)
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175
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176 repo.invalidate()
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177 f = open('y', 'w')
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178 f.write('b')
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179 f.close()
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180 print("* file y created")
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181 print(repo.cached)
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182
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183 def antiambiguity():
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184 filename = 'ambigcheck'
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185
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186 # try some times, because reproduction of ambiguity depends on
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187 # "filesystem time"
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188 for i in xrange(5):
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189 fp = open(filename, 'w')
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190 fp.write('FOO')
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191 fp.close()
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192
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193 oldstat = os.stat(filename)
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194 if oldstat.st_ctime != oldstat.st_mtime:
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195 # subsequent changing never causes ambiguity
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196 continue
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197
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198 repetition = 3
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199
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200 # repeat changing via checkambigatclosing, to examine whether
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201 # st_mtime is advanced multiple times as expected
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202 for i in xrange(repetition):
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203 # explicit closing
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204 fp = vfsmod.checkambigatclosing(open(filename, 'a'))
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205 fp.write('FOO')
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206 fp.close()
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207
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208 # implicit closing by "with" statement
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209 with vfsmod.checkambigatclosing(open(filename, 'a')) as fp:
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210 fp.write('BAR')
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211
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diff changeset
212 newstat = os.stat(filename)
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diff changeset
213 if oldstat.st_ctime != newstat.st_ctime:
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214 # timestamp ambiguity was naturally avoided while repetition
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diff changeset
215 continue
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FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
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diff changeset
216
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diff changeset
217 # st_mtime should be advanced "repetition * 2" times, because
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218 # all changes occurred at same time (in sec)
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diff changeset
219 expected = (oldstat.st_mtime + repetition * 2) & 0x7fffffff
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220 if newstat.st_mtime != expected:
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diff changeset
221 print("'newstat.st_mtime %s is not %s (as %s + %s * 2)" %
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FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
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diff changeset
222 (newstat.st_mtime, expected, oldstat.st_mtime, repetition))
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diff changeset
223
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diff changeset
224 # no more examination is needed regardless of result
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225 break
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diff changeset
226 else:
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227 # This platform seems too slow to examine anti-ambiguity
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diff changeset
228 # of file timestamp (or test happened to be executed at
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diff changeset
229 # bad timing). Exit silently in this case, because running
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diff changeset
230 # on other faster platforms can detect problems
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diff changeset
231 pass
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diff changeset
232
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233 print('basic:')
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diff changeset
234 print()
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235 basic(fakerepo())
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diff changeset
236 print()
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237 print('fakeuncacheable:')
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238 print()
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parents:
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239 fakeuncacheable()
18313
3e4a944c0d04 destroyed: keep the filecache in sync with __dict__ (issue3335) (issue3693) (issue3743)
Idan Kamara <idankk86@gmail.com>
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diff changeset
240 test_filecache_synced()
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diff changeset
241 print()
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diff changeset
242 print('setbeforeget:')
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diff changeset
243 print()
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diff changeset
244 setbeforeget(fakerepo())
29999
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diff changeset
245 print()
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diff changeset
246 print('antiambiguity:')
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diff changeset
247 print()
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diff changeset
248 antiambiguity()