Mercurial > hg
annotate tests/test-lock.py @ 34980:705d0f2bb677 stable
pathutil: add doctests for canonpath()
This is a followup to f445b10dc7fb. Since there's no way to ensure that more
drive letters than C: exist, this seems like the only way to test it. This is
enough to catch the f445b10dc7fb scenario, as well as CWD outside of the repo
when the path isn't prefixed with path/to/repo.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Fri, 03 Nov 2017 22:22:50 -0400 |
parents | daf12f69699f |
children | 5ee3146c1b20 |
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1 from __future__ import absolute_import |
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2 |
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3 import copy |
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4 import errno |
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5 import os |
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6 import silenttestrunner |
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7 import tempfile |
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8 import types |
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9 import unittest |
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10 |
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11 from mercurial import ( |
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12 error, |
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13 lock, |
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14 vfs as vfsmod, |
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15 ) |
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16 |
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17 testlockname = 'testlock' |
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18 |
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19 # work around http://bugs.python.org/issue1515 |
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20 if types.MethodType not in copy._deepcopy_dispatch: |
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21 def _deepcopy_method(x, memo): |
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22 return type(x)(x.__func__, copy.deepcopy(x.__self__, memo), x.im_class) |
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23 copy._deepcopy_dispatch[types.MethodType] = _deepcopy_method |
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24 |
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25 class lockwrapper(lock.lock): |
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26 def __init__(self, pidoffset, *args, **kwargs): |
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27 # lock.lock.__init__() calls lock(), so the pidoffset assignment needs |
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28 # to be earlier |
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29 self._pidoffset = pidoffset |
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30 super(lockwrapper, self).__init__(*args, **kwargs) |
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31 def _getpid(self): |
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32 return super(lockwrapper, self)._getpid() + self._pidoffset |
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33 |
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34 class teststate(object): |
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35 def __init__(self, testcase, dir, pidoffset=0): |
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36 self._testcase = testcase |
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37 self._acquirecalled = False |
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38 self._releasecalled = False |
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39 self._postreleasecalled = False |
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40 self.vfs = vfsmod.vfs(dir, audit=False) |
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41 self._pidoffset = pidoffset |
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42 |
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43 def makelock(self, *args, **kwargs): |
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44 l = lockwrapper(self._pidoffset, self.vfs, testlockname, |
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45 releasefn=self.releasefn, acquirefn=self.acquirefn, |
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46 *args, **kwargs) |
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47 l.postrelease.append(self.postreleasefn) |
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48 return l |
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49 |
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50 def acquirefn(self): |
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51 self._acquirecalled = True |
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52 |
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53 def releasefn(self): |
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54 self._releasecalled = True |
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55 |
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56 def postreleasefn(self): |
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57 self._postreleasecalled = True |
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58 |
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59 def assertacquirecalled(self, called): |
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60 self._testcase.assertEqual( |
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61 self._acquirecalled, called, |
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62 'expected acquire to be %s but was actually %s' % ( |
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63 self._tocalled(called), |
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64 self._tocalled(self._acquirecalled), |
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65 )) |
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66 |
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67 def resetacquirefn(self): |
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68 self._acquirecalled = False |
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69 |
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70 def assertreleasecalled(self, called): |
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71 self._testcase.assertEqual( |
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72 self._releasecalled, called, |
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73 'expected release to be %s but was actually %s' % ( |
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74 self._tocalled(called), |
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75 self._tocalled(self._releasecalled), |
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76 )) |
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77 |
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78 def assertpostreleasecalled(self, called): |
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79 self._testcase.assertEqual( |
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80 self._postreleasecalled, called, |
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81 'expected postrelease to be %s but was actually %s' % ( |
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82 self._tocalled(called), |
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83 self._tocalled(self._postreleasecalled), |
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84 )) |
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85 |
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86 def assertlockexists(self, exists): |
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87 actual = self.vfs.lexists(testlockname) |
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88 self._testcase.assertEqual( |
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89 actual, exists, |
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90 'expected lock to %s but actually did %s' % ( |
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91 self._toexists(exists), |
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92 self._toexists(actual), |
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93 )) |
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94 |
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95 def _tocalled(self, called): |
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96 if called: |
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97 return 'called' |
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98 else: |
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99 return 'not called' |
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100 |
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101 def _toexists(self, exists): |
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102 if exists: |
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103 return 'exist' |
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104 else: |
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105 return 'not exist' |
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106 |
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107 class testlock(unittest.TestCase): |
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108 def testlock(self): |
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109 state = teststate(self, tempfile.mkdtemp(dir=os.getcwd())) |
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110 lock = state.makelock() |
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111 state.assertacquirecalled(True) |
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112 lock.release() |
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113 state.assertreleasecalled(True) |
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114 state.assertpostreleasecalled(True) |
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115 state.assertlockexists(False) |
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116 |
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117 def testrecursivelock(self): |
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118 state = teststate(self, tempfile.mkdtemp(dir=os.getcwd())) |
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119 lock = state.makelock() |
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120 state.assertacquirecalled(True) |
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121 |
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122 state.resetacquirefn() |
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123 lock.lock() |
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124 # recursive lock should not call acquirefn again |
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125 state.assertacquirecalled(False) |
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126 |
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127 lock.release() # brings lock refcount down from 2 to 1 |
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128 state.assertreleasecalled(False) |
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129 state.assertpostreleasecalled(False) |
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130 state.assertlockexists(True) |
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131 |
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132 lock.release() # releases the lock |
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133 state.assertreleasecalled(True) |
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134 state.assertpostreleasecalled(True) |
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135 state.assertlockexists(False) |
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136 |
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137 def testlockfork(self): |
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138 state = teststate(self, tempfile.mkdtemp(dir=os.getcwd())) |
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139 lock = state.makelock() |
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140 state.assertacquirecalled(True) |
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141 |
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142 # fake a fork |
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143 forklock = copy.deepcopy(lock) |
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144 forklock._pidoffset = 1 |
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145 forklock.release() |
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146 state.assertreleasecalled(False) |
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147 state.assertpostreleasecalled(False) |
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148 state.assertlockexists(True) |
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149 |
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150 # release the actual lock |
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151 lock.release() |
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152 state.assertreleasecalled(True) |
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153 state.assertpostreleasecalled(True) |
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154 state.assertlockexists(False) |
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155 |
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156 def testinheritlock(self): |
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157 d = tempfile.mkdtemp(dir=os.getcwd()) |
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158 parentstate = teststate(self, d) |
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159 parentlock = parentstate.makelock() |
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160 parentstate.assertacquirecalled(True) |
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161 |
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162 # set up lock inheritance |
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163 with parentlock.inherit() as lockname: |
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164 parentstate.assertreleasecalled(True) |
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165 parentstate.assertpostreleasecalled(False) |
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166 parentstate.assertlockexists(True) |
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167 |
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168 childstate = teststate(self, d, pidoffset=1) |
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169 childlock = childstate.makelock(parentlock=lockname) |
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170 childstate.assertacquirecalled(True) |
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171 |
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172 childlock.release() |
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173 childstate.assertreleasecalled(True) |
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174 childstate.assertpostreleasecalled(False) |
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175 childstate.assertlockexists(True) |
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176 |
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177 parentstate.resetacquirefn() |
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178 |
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179 parentstate.assertacquirecalled(True) |
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180 |
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181 parentlock.release() |
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182 parentstate.assertreleasecalled(True) |
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183 parentstate.assertpostreleasecalled(True) |
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184 parentstate.assertlockexists(False) |
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185 |
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186 def testmultilock(self): |
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187 d = tempfile.mkdtemp(dir=os.getcwd()) |
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188 state0 = teststate(self, d) |
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189 lock0 = state0.makelock() |
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190 state0.assertacquirecalled(True) |
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191 |
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192 with lock0.inherit() as lock0name: |
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193 state0.assertreleasecalled(True) |
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194 state0.assertpostreleasecalled(False) |
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195 state0.assertlockexists(True) |
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196 |
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197 state1 = teststate(self, d, pidoffset=1) |
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198 lock1 = state1.makelock(parentlock=lock0name) |
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199 state1.assertacquirecalled(True) |
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200 |
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201 # from within lock1, acquire another lock |
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202 with lock1.inherit() as lock1name: |
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203 # since the file on disk is lock0's this should have the same |
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204 # name |
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205 self.assertEqual(lock0name, lock1name) |
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206 |
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207 state2 = teststate(self, d, pidoffset=2) |
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208 lock2 = state2.makelock(parentlock=lock1name) |
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209 state2.assertacquirecalled(True) |
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210 |
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211 lock2.release() |
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212 state2.assertreleasecalled(True) |
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213 state2.assertpostreleasecalled(False) |
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214 state2.assertlockexists(True) |
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215 |
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216 state1.resetacquirefn() |
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217 |
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218 state1.assertacquirecalled(True) |
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219 |
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220 lock1.release() |
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221 state1.assertreleasecalled(True) |
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222 state1.assertpostreleasecalled(False) |
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223 state1.assertlockexists(True) |
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224 |
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225 lock0.release() |
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226 |
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227 def testinheritlockfork(self): |
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228 d = tempfile.mkdtemp(dir=os.getcwd()) |
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229 parentstate = teststate(self, d) |
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230 parentlock = parentstate.makelock() |
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231 parentstate.assertacquirecalled(True) |
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232 |
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233 # set up lock inheritance |
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234 with parentlock.inherit() as lockname: |
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235 childstate = teststate(self, d, pidoffset=1) |
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236 childlock = childstate.makelock(parentlock=lockname) |
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237 childstate.assertacquirecalled(True) |
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238 |
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239 # fork the child lock |
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240 forkchildlock = copy.deepcopy(childlock) |
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241 forkchildlock._pidoffset += 1 |
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242 forkchildlock.release() |
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243 childstate.assertreleasecalled(False) |
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244 childstate.assertpostreleasecalled(False) |
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245 childstate.assertlockexists(True) |
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246 |
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247 # release the child lock |
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248 childlock.release() |
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249 childstate.assertreleasecalled(True) |
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250 childstate.assertpostreleasecalled(False) |
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251 childstate.assertlockexists(True) |
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252 |
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253 parentlock.release() |
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254 |
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255 def testinheritcheck(self): |
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256 d = tempfile.mkdtemp(dir=os.getcwd()) |
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257 state = teststate(self, d) |
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258 def check(): |
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259 raise error.LockInheritanceContractViolation('check failed') |
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260 lock = state.makelock(inheritchecker=check) |
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261 state.assertacquirecalled(True) |
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262 |
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263 with self.assertRaises(error.LockInheritanceContractViolation): |
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264 with lock.inherit(): |
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265 pass |
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266 |
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267 lock.release() |
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268 |
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269 def testfrequentlockunlock(self): |
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270 """This tests whether lock acquisition fails as expected, even if |
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271 (1) lock can't be acquired (makelock fails by EEXIST), and |
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272 (2) locker info can't be read in (readlock fails by ENOENT) while |
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273 retrying 5 times. |
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274 """ |
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275 |
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276 d = tempfile.mkdtemp(dir=os.getcwd()) |
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277 state = teststate(self, d) |
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278 |
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279 def emulatefrequentlock(*args): |
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280 raise OSError(errno.EEXIST, "File exists") |
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281 def emulatefrequentunlock(*args): |
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282 raise OSError(errno.ENOENT, "No such file or directory") |
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283 |
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284 state.vfs.makelock = emulatefrequentlock |
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285 state.vfs.readlock = emulatefrequentunlock |
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286 |
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287 try: |
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288 state.makelock(timeout=0) |
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289 self.fail("unexpected lock acquisition") |
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290 except error.LockHeld as why: |
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291 self.assertTrue(why.errno == errno.ETIMEDOUT) |
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292 self.assertTrue(why.locker == "") |
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293 state.assertlockexists(False) |
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294 |
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295 if __name__ == '__main__': |
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296 silenttestrunner.main(__name__) |