Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_bsddb.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 7641a3f0b2ec
children 6768b2350c57
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4977
9b1694390820 Test script for the bsddb C extension module.
Roger E. Masse <rmasse@newcnri.cnri.reston.va.us>
parents:
diff changeset
1 #! /usr/bin/env python
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2 """Test script for the bsddb C module by Roger E. Masse
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3 Adapted to unittest format and expanded scope by Raymond Hettinger
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4 """
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5 import os, sys
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6 import copy
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7 import unittest
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8 from test import test_support
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9
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10 # Skip test if _bsddb wasn't built.
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11 test_support.import_module('_bsddb')
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12
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9b1694390820 Test script for the bsddb C extension module.
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13 import bsddb
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14 import dbhash # Just so we know it's imported
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15
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16
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17 class TestBSDDB(unittest.TestCase):
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18 openflag = 'c'
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19
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20 def setUp(self):
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21 self.f = self.openmethod[0](self.fname, self.openflag, cachesize=32768)
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22 self.d = dict(q='Guido', w='van', e='Rossum', r='invented', t='Python', y='')
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23 for k, v in self.d.iteritems():
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24 self.f[k] = v
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25
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26 def tearDown(self):
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27 self.f.sync()
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28 self.f.close()
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29 if self.fname is None:
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30 return
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31 try:
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32 os.remove(self.fname)
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33 except os.error:
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34 pass
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35
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36 def test_getitem(self):
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37 for k, v in self.d.iteritems():
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38 self.assertEqual(self.f[k], v)
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39
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40 def test_len(self):
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41 self.assertEqual(len(self.f), len(self.d))
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42
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43 def test_change(self):
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44 self.f['r'] = 'discovered'
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45 self.assertEqual(self.f['r'], 'discovered')
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46 self.assert_('r' in self.f.keys())
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47 self.assert_('discovered' in self.f.values())
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48
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49 def test_close_and_reopen(self):
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50 if self.fname is None:
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51 # if we're using an in-memory only db, we can't reopen it
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52 # so finish here.
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53 return
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54 self.f.close()
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55 self.f = self.openmethod[0](self.fname, 'w')
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56 for k, v in self.d.iteritems():
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57 self.assertEqual(self.f[k], v)
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58
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59 def assertSetEquals(self, seqn1, seqn2):
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60 self.assertEqual(set(seqn1), set(seqn2))
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61
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62 def test_mapping_iteration_methods(self):
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63 f = self.f
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64 d = self.d
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65 self.assertSetEquals(d, f)
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66 self.assertSetEquals(d.keys(), f.keys())
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67 self.assertSetEquals(d.values(), f.values())
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68 self.assertSetEquals(d.items(), f.items())
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69 self.assertSetEquals(d.iterkeys(), f.iterkeys())
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70 self.assertSetEquals(d.itervalues(), f.itervalues())
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71 self.assertSetEquals(d.iteritems(), f.iteritems())
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72
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73 def test_iter_while_modifying_values(self):
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74 di = iter(self.d)
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75 while 1:
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76 try:
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77 key = di.next()
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78 self.d[key] = 'modified '+key
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79 except StopIteration:
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80 break
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81
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82 # it should behave the same as a dict. modifying values
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83 # of existing keys should not break iteration. (adding
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84 # or removing keys should)
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85 loops_left = len(self.f)
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86 fi = iter(self.f)
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87 while 1:
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88 try:
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89 key = fi.next()
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90 self.f[key] = 'modified '+key
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91 loops_left -= 1
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92 except StopIteration:
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93 break
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94 self.assertEqual(loops_left, 0)
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95
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96 self.test_mapping_iteration_methods()
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97
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98 def test_iter_abort_on_changed_size(self):
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99 def DictIterAbort():
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100 di = iter(self.d)
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101 while 1:
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102 try:
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103 di.next()
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104 self.d['newkey'] = 'SPAM'
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105 except StopIteration:
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106 break
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107 self.assertRaises(RuntimeError, DictIterAbort)
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108
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109 def DbIterAbort():
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110 fi = iter(self.f)
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111 while 1:
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112 try:
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113 fi.next()
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114 self.f['newkey'] = 'SPAM'
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115 except StopIteration:
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116 break
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117 self.assertRaises(RuntimeError, DbIterAbort)
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118
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119 def test_iteritems_abort_on_changed_size(self):
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120 def DictIteritemsAbort():
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121 di = self.d.iteritems()
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122 while 1:
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123 try:
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124 di.next()
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125 self.d['newkey'] = 'SPAM'
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126 except StopIteration:
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127 break
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128 self.assertRaises(RuntimeError, DictIteritemsAbort)
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129
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130 def DbIteritemsAbort():
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131 fi = self.f.iteritems()
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132 while 1:
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133 try:
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134 key, value = fi.next()
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135 del self.f[key]
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136 except StopIteration:
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137 break
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138 self.assertRaises(RuntimeError, DbIteritemsAbort)
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139
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140 def test_iteritems_while_modifying_values(self):
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141 di = self.d.iteritems()
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142 while 1:
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143 try:
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144 k, v = di.next()
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145 self.d[k] = 'modified '+v
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146 except StopIteration:
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147 break
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148
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149 # it should behave the same as a dict. modifying values
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150 # of existing keys should not break iteration. (adding
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151 # or removing keys should)
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152 loops_left = len(self.f)
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153 fi = self.f.iteritems()
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154 while 1:
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155 try:
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156 k, v = fi.next()
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157 self.f[k] = 'modified '+v
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158 loops_left -= 1
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159 except StopIteration:
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160 break
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161 self.assertEqual(loops_left, 0)
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162
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163 self.test_mapping_iteration_methods()
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164
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165 def test_first_next_looping(self):
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166 items = [self.f.first()]
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167 for i in xrange(1, len(self.f)):
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168 items.append(self.f.next())
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169 self.assertSetEquals(items, self.d.items())
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170
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171 def test_previous_last_looping(self):
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172 items = [self.f.last()]
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173 for i in xrange(1, len(self.f)):
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174 items.append(self.f.previous())
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175 self.assertSetEquals(items, self.d.items())
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176
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177 def test_first_while_deleting(self):
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178 # Test for bug 1725856
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179 self.assert_(len(self.d) >= 2, "test requires >=2 items")
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180 for _ in self.d:
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181 key = self.f.first()[0]
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182 del self.f[key]
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183 self.assertEqual([], self.f.items(), "expected empty db after test")
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184
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185 def test_last_while_deleting(self):
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186 # Test for bug 1725856's evil twin
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187 self.assert_(len(self.d) >= 2, "test requires >=2 items")
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188 for _ in self.d:
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189 key = self.f.last()[0]
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190 del self.f[key]
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191 self.assertEqual([], self.f.items(), "expected empty db after test")
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192
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193 def test_set_location(self):
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194 self.assertEqual(self.f.set_location('e'), ('e', self.d['e']))
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195
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196 def test_contains(self):
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197 for k in self.d:
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198 self.assert_(k in self.f)
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199 self.assert_('not here' not in self.f)
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200
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201 def test_has_key(self):
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202 for k in self.d:
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203 self.assert_(self.f.has_key(k))
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204 self.assert_(not self.f.has_key('not here'))
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205
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206 def test_clear(self):
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207 self.f.clear()
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208 self.assertEqual(len(self.f), 0)
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parents:
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209
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210 def test__no_deadlock_first(self, debug=0):
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211 # do this so that testers can see what function we're in in
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212 # verbose mode when we deadlock.
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213 sys.stdout.flush()
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214
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diff changeset
215 # in pybsddb's _DBWithCursor this causes an internal DBCursor
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diff changeset
216 # object is created. Other test_ methods in this class could
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diff changeset
217 # inadvertently cause the deadlock but an explicit test is needed.
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diff changeset
218 if debug: print "A"
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diff changeset
219 k,v = self.f.first()
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diff changeset
220 if debug: print "B", k
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diff changeset
221 self.f[k] = "deadlock. do not pass go. do not collect $200."
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diff changeset
222 if debug: print "C"
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diff changeset
223 # if the bsddb implementation leaves the DBCursor open during
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diff changeset
224 # the database write and locking+threading support is enabled
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diff changeset
225 # the cursor's read lock will deadlock the write lock request..
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226
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227 # test the iterator interface
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228 if True:
30837
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diff changeset
229 if debug: print "D"
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diff changeset
230 i = self.f.iteritems()
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diff changeset
231 k,v = i.next()
30837
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diff changeset
232 if debug: print "E"
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diff changeset
233 self.f[k] = "please don't deadlock"
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diff changeset
234 if debug: print "F"
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diff changeset
235 while 1:
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diff changeset
236 try:
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diff changeset
237 k,v = i.next()
30837
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diff changeset
238 except StopIteration:
e676c95e4844 * Fix the singlethreaded deadlocks occurring in the simple bsddb interface.
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diff changeset
239 break
e676c95e4844 * Fix the singlethreaded deadlocks occurring in the simple bsddb interface.
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diff changeset
240 if debug: print "F2"
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diff changeset
241
e676c95e4844 * Fix the singlethreaded deadlocks occurring in the simple bsddb interface.
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diff changeset
242 i = iter(self.f)
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diff changeset
243 if debug: print "G"
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diff changeset
244 while i:
e676c95e4844 * Fix the singlethreaded deadlocks occurring in the simple bsddb interface.
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diff changeset
245 try:
e676c95e4844 * Fix the singlethreaded deadlocks occurring in the simple bsddb interface.
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diff changeset
246 if debug: print "H"
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diff changeset
247 k = i.next()
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diff changeset
248 if debug: print "I"
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diff changeset
249 self.f[k] = "deadlocks-r-us"
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diff changeset
250 if debug: print "J"
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diff changeset
251 except StopIteration:
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diff changeset
252 i = None
e676c95e4844 * Fix the singlethreaded deadlocks occurring in the simple bsddb interface.
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diff changeset
253 if debug: print "K"
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diff changeset
254
e676c95e4844 * Fix the singlethreaded deadlocks occurring in the simple bsddb interface.
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diff changeset
255 # test the legacy cursor interface mixed with writes
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diff changeset
256 self.assert_(self.f.first()[0] in self.d)
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diff changeset
257 k = self.f.next()[0]
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diff changeset
258 self.assert_(k in self.d)
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parents: 30423
diff changeset
259 self.f[k] = "be gone with ye deadlocks"
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260 self.assert_(self.f[k], "be gone with ye deadlocks")
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261
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262 def test_for_cursor_memleak(self):
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263 # do the bsddb._DBWithCursor iterator internals leak cursors?
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264 nc1 = len(self.f._cursor_refs)
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265 # create iterator
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266 i = self.f.iteritems()
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267 nc2 = len(self.f._cursor_refs)
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268 # use the iterator (should run to the first yield, creating the cursor)
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269 k, v = i.next()
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270 nc3 = len(self.f._cursor_refs)
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271 # destroy the iterator; this should cause the weakref callback
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272 # to remove the cursor object from self.f._cursor_refs
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273 del i
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274 nc4 = len(self.f._cursor_refs)
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275
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276 self.assertEqual(nc1, nc2)
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277 self.assertEqual(nc1, nc4)
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278 self.assert_(nc3 == nc1+1)
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279
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280 def test_popitem(self):
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281 k, v = self.f.popitem()
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282 self.assert_(k in self.d)
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283 self.assert_(v in self.d.values())
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284 self.assert_(k not in self.f)
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285 self.assertEqual(len(self.d)-1, len(self.f))
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286
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287 def test_pop(self):
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288 k = 'w'
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289 v = self.f.pop(k)
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290 self.assertEqual(v, self.d[k])
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291 self.assert_(k not in self.f)
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292 self.assert_(v not in self.f.values())
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293 self.assertEqual(len(self.d)-1, len(self.f))
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294
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295 def test_get(self):
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296 self.assertEqual(self.f.get('NotHere'), None)
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297 self.assertEqual(self.f.get('NotHere', 'Default'), 'Default')
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298 self.assertEqual(self.f.get('q', 'Default'), self.d['q'])
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299
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diff changeset
300 def test_setdefault(self):
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301 self.assertEqual(self.f.setdefault('new', 'dog'), 'dog')
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302 self.assertEqual(self.f.setdefault('r', 'cat'), self.d['r'])
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303
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304 def test_update(self):
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305 new = dict(y='life', u='of', i='brian')
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306 self.f.update(new)
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307 self.d.update(new)
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308 for k, v in self.d.iteritems():
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diff changeset
309 self.assertEqual(self.f[k], v)
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310
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diff changeset
311 def test_keyordering(self):
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diff changeset
312 if self.openmethod[0] is not bsddb.btopen:
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313 return
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314 keys = self.d.keys()
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315 keys.sort()
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316 self.assertEqual(self.f.first()[0], keys[0])
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317 self.assertEqual(self.f.next()[0], keys[1])
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318 self.assertEqual(self.f.last()[0], keys[-1])
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319 self.assertEqual(self.f.previous()[0], keys[-2])
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320 self.assertEqual(list(self.f), keys)
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321
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322 class TestBTree(TestBSDDB):
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323 fname = test_support.TESTFN
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324 openmethod = [bsddb.btopen]
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325
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326 class TestBTree_InMemory(TestBSDDB):
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327 fname = None
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328 openmethod = [bsddb.btopen]
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329
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330 class TestBTree_InMemory_Truncate(TestBSDDB):
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331 fname = None
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332 openflag = 'n'
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333 openmethod = [bsddb.btopen]
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334
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335 class TestHashTable(TestBSDDB):
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336 fname = test_support.TESTFN
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337 openmethod = [bsddb.hashopen]
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338
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diff changeset
339 class TestHashTable_InMemory(TestBSDDB):
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340 fname = None
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341 openmethod = [bsddb.hashopen]
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342
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343 ## # (bsddb.rnopen,'Record Numbers'), 'put' for RECNO for bsddb 1.85
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344 ## # appears broken... at least on
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345 ## # Solaris Intel - rmasse 1/97
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346
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diff changeset
347 def test_main(verbose=None):
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diff changeset
348 test_support.run_unittest(
7433e7c9e2ca * Converted test to unittest format.
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diff changeset
349 TestBTree,
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diff changeset
350 TestHashTable,
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diff changeset
351 TestBTree_InMemory,
7433e7c9e2ca * Converted test to unittest format.
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diff changeset
352 TestHashTable_InMemory,
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diff changeset
353 TestBTree_InMemory_Truncate,
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diff changeset
354 )
7433e7c9e2ca * Converted test to unittest format.
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355
7433e7c9e2ca * Converted test to unittest format.
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diff changeset
356 if __name__ == "__main__":
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diff changeset
357 test_main(verbose=True)