Mercurial > hg
annotate tests/test-lock.py @ 33648:47ea28293d30 stable
tests: show cache of audited paths is never invalidated
author | Yuya Nishihara <yuya@tcha.org> |
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date | Tue, 01 Aug 2017 21:03:25 +0900 |
parents | 68c43a416585 |
children | daf12f69699f |
rev | line source |
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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.im_func, copy.deepcopy(x.im_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__) |