Mercurial > hg
annotate tests/test-lrucachedict.py @ 46368:bb3a5c0df06b
purge: move extension into core mercurial
The motivation is simple: it's nicer to avoid gating basic
functionality.
To reduce the risk of people shooting themselves in the feet, `--confirm` is now
the default, unless the extensions is loaded..
For review of the body of the purge command, use this instead of what
hg/phabricator will show (the block of code is modified, not just
moved):
Differential Revision: https://phab.mercurial-scm.org/D9820
author | Valentin Gatien-Baron <valentin.gatienbaron@gmail.com> |
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date | Mon, 18 Jan 2021 10:24:20 +0100 |
parents | 2372284d9457 |
children | 6000f5b25c9b |
rev | line source |
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1 from __future__ import absolute_import, print_function |
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2 |
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3 import unittest |
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4 |
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5 import silenttestrunner |
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6 |
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7 from mercurial import util |
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8 |
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10 class testlrucachedict(unittest.TestCase): |
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11 def testsimple(self): |
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12 d = util.lrucachedict(4) |
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13 self.assertEqual(d.capacity, 4) |
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14 d.insert('a', 'va', cost=2) |
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15 d['b'] = 'vb' |
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16 d['c'] = 'vc' |
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17 d.insert('d', 'vd', cost=42) |
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19 self.assertEqual(d['a'], 'va') |
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20 self.assertEqual(d['b'], 'vb') |
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21 self.assertEqual(d['c'], 'vc') |
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22 self.assertEqual(d['d'], 'vd') |
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24 self.assertEqual(d.totalcost, 44) |
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25 |
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26 # 'a' should be dropped because it was least recently used. |
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27 d['e'] = 've' |
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28 self.assertNotIn('a', d) |
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29 self.assertIsNone(d.get('a')) |
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30 self.assertEqual(d.totalcost, 42) |
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32 self.assertEqual(d['b'], 'vb') |
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33 self.assertEqual(d['c'], 'vc') |
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34 self.assertEqual(d['d'], 'vd') |
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35 self.assertEqual(d['e'], 've') |
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37 # Replacing item with different cost adjusts totalcost. |
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38 d.insert('e', 've', cost=4) |
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39 self.assertEqual(d.totalcost, 46) |
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40 |
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41 # Touch entries in some order (both get and set). |
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42 d['e'] |
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43 d['c'] = 'vc2' |
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44 d['d'] |
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45 d['b'] = 'vb2' |
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46 |
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47 # 'e' should be dropped now |
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48 d['f'] = 'vf' |
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49 self.assertNotIn('e', d) |
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50 self.assertEqual(d['b'], 'vb2') |
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51 self.assertEqual(d['c'], 'vc2') |
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52 self.assertEqual(d['d'], 'vd') |
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53 self.assertEqual(d['f'], 'vf') |
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55 d.clear() |
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56 for key in ('a', 'b', 'c', 'd', 'e', 'f'): |
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57 self.assertNotIn(key, d) |
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59 def testunfull(self): |
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60 d = util.lrucachedict(4) |
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61 d['a'] = 1 |
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62 d['b'] = 2 |
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63 d['a'] |
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64 d['b'] |
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65 |
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66 for key in ('a', 'b'): |
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67 self.assertIn(key, d) |
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68 |
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69 def testget(self): |
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70 d = util.lrucachedict(4) |
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71 d['a'] = 'va' |
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72 d['b'] = 'vb' |
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73 d['c'] = 'vc' |
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74 |
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75 self.assertIsNone(d.get('missing')) |
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76 self.assertEqual(list(d), ['c', 'b', 'a']) |
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77 |
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78 self.assertEqual(d.get('a'), 'va') |
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79 self.assertEqual(list(d), ['a', 'c', 'b']) |
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80 |
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81 def testpeek(self): |
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82 d = util.lrucachedict(4) |
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83 d['a'] = 'va' |
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84 d['b'] = 'vb' |
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85 d['c'] = 'vc' |
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86 |
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87 with self.assertRaises(KeyError): |
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88 d.peek('missing') |
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89 self.assertEqual(list(d), ['c', 'b', 'a']) |
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90 self.assertIsNone(d.peek('missing', None)) |
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91 self.assertEqual(list(d), ['c', 'b', 'a']) |
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92 |
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93 self.assertEqual(d.peek('a'), 'va') |
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94 self.assertEqual(list(d), ['c', 'b', 'a']) |
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95 |
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96 def testpop(self): |
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97 d = util.lrucachedict(4) |
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98 d['a'] = 'va' |
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99 d['b'] = 'vb' |
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100 d['c'] = 'vc' |
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101 |
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102 with self.assertRaises(KeyError): |
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103 d.pop('missing') |
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104 self.assertEqual(list(d), ['c', 'b', 'a']) |
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105 self.assertIsNone(d.pop('missing', None)) |
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106 self.assertEqual(list(d), ['c', 'b', 'a']) |
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107 |
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108 self.assertEqual(d.pop('b'), 'vb') |
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109 self.assertEqual(list(d), ['c', 'a']) |
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110 |
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111 def testcopypartial(self): |
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112 d = util.lrucachedict(4) |
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113 d.insert('a', 'va', cost=4) |
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114 d.insert('b', 'vb', cost=2) |
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115 |
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116 dc = d.copy() |
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117 |
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118 self.assertEqual(len(dc), 2) |
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119 self.assertEqual(dc.totalcost, 6) |
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120 for key in ('a', 'b'): |
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121 self.assertIn(key, dc) |
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122 self.assertEqual(dc[key], 'v%s' % key) |
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123 |
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124 self.assertEqual(len(d), 2) |
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125 for key in ('a', 'b'): |
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126 self.assertIn(key, d) |
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127 self.assertEqual(d[key], 'v%s' % key) |
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128 |
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129 d['c'] = 'vc' |
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130 del d['b'] |
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131 self.assertEqual(d.totalcost, 4) |
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132 dc = d.copy() |
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133 self.assertEqual(len(dc), 2) |
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134 self.assertEqual(dc.totalcost, 4) |
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135 for key in ('a', 'c'): |
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136 self.assertIn(key, dc) |
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137 self.assertEqual(dc[key], 'v%s' % key) |
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138 |
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139 def testcopyempty(self): |
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140 d = util.lrucachedict(4) |
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141 dc = d.copy() |
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142 self.assertEqual(len(dc), 0) |
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143 |
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144 def testcopyfull(self): |
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145 d = util.lrucachedict(4) |
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146 d.insert('a', 'va', cost=42) |
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147 d['b'] = 'vb' |
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148 d['c'] = 'vc' |
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149 d['d'] = 'vd' |
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150 |
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151 dc = d.copy() |
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152 |
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153 for key in ('a', 'b', 'c', 'd'): |
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154 self.assertIn(key, dc) |
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155 self.assertEqual(dc[key], 'v%s' % key) |
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156 |
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157 self.assertEqual(d.totalcost, 42) |
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158 self.assertEqual(dc.totalcost, 42) |
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159 |
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160 # 'a' should be dropped because it was least recently used. |
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161 dc['e'] = 've' |
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162 self.assertNotIn('a', dc) |
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163 for key in ('b', 'c', 'd', 'e'): |
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164 self.assertIn(key, dc) |
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165 self.assertEqual(dc[key], 'v%s' % key) |
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166 |
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167 self.assertEqual(d.totalcost, 42) |
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168 self.assertEqual(dc.totalcost, 0) |
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169 |
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170 # Contents and order of original dict should remain unchanged. |
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171 dc['b'] = 'vb_new' |
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172 |
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173 self.assertEqual(list(iter(d)), ['d', 'c', 'b', 'a']) |
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174 for key in ('a', 'b', 'c', 'd'): |
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175 self.assertEqual(d[key], 'v%s' % key) |
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176 |
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177 d = util.lrucachedict(4, maxcost=42) |
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178 d.insert('a', 'va', cost=5) |
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179 d.insert('b', 'vb', cost=4) |
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180 d.insert('c', 'vc', cost=3) |
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181 dc = d.copy() |
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182 self.assertEqual(dc.maxcost, 42) |
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183 self.assertEqual(len(dc), 3) |
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184 |
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185 # Max cost can be lowered as part of copy. |
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186 dc = d.copy(maxcost=10) |
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187 self.assertEqual(dc.maxcost, 10) |
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188 self.assertEqual(len(dc), 2) |
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189 self.assertEqual(dc.totalcost, 7) |
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190 self.assertIn('b', dc) |
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191 self.assertIn('c', dc) |
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192 |
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193 def testcopydecreasecapacity(self): |
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194 d = util.lrucachedict(5) |
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195 d.insert('a', 'va', cost=4) |
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196 d.insert('b', 'vb', cost=2) |
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197 d['c'] = 'vc' |
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198 d['d'] = 'vd' |
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199 |
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200 dc = d.copy(2) |
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201 self.assertEqual(dc.totalcost, 0) |
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202 for key in ('a', 'b'): |
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203 self.assertNotIn(key, dc) |
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204 for key in ('c', 'd'): |
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205 self.assertIn(key, dc) |
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206 self.assertEqual(dc[key], 'v%s' % key) |
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207 |
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208 dc.insert('e', 've', cost=7) |
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209 self.assertEqual(dc.totalcost, 7) |
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210 self.assertNotIn('c', dc) |
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211 for key in ('d', 'e'): |
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212 self.assertIn(key, dc) |
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213 self.assertEqual(dc[key], 'v%s' % key) |
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214 |
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215 # Original should remain unchanged. |
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216 self.assertEqual(d.totalcost, 6) |
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217 for key in ('a', 'b', 'c', 'd'): |
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218 self.assertIn(key, d) |
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219 self.assertEqual(d[key], 'v%s' % key) |
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220 |
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221 def testcopyincreasecapacity(self): |
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222 d = util.lrucachedict(5) |
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223 d['a'] = 'va' |
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224 d['b'] = 'vb' |
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225 d['c'] = 'vc' |
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226 d['d'] = 'vd' |
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227 |
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228 dc = d.copy(6) |
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229 for key in ('a', 'b', 'c', 'd'): |
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230 self.assertIn(key, dc) |
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231 self.assertEqual(dc[key], 'v%s' % key) |
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232 |
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233 dc['e'] = 've' |
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234 dc['f'] = 'vf' |
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235 for key in ('a', 'b', 'c', 'd', 'e', 'f'): |
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236 self.assertIn(key, dc) |
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237 self.assertEqual(dc[key], 'v%s' % key) |
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238 |
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239 dc['g'] = 'vg' |
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240 self.assertNotIn('a', dc) |
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241 for key in ('b', 'c', 'd', 'e', 'f', 'g'): |
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242 self.assertIn(key, dc) |
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243 self.assertEqual(dc[key], 'v%s' % key) |
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244 |
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245 # Original should remain unchanged. |
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246 for key in ('a', 'b', 'c', 'd'): |
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247 self.assertIn(key, d) |
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248 self.assertEqual(d[key], 'v%s' % key) |
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249 |
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250 def testpopoldest(self): |
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251 d = util.lrucachedict(4) |
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252 d.insert('a', 'va', cost=10) |
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253 d.insert('b', 'vb', cost=5) |
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254 |
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255 self.assertEqual(len(d), 2) |
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256 self.assertEqual(d.popoldest(), ('a', 'va')) |
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257 self.assertEqual(len(d), 1) |
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258 self.assertEqual(d.totalcost, 5) |
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259 self.assertEqual(d.popoldest(), ('b', 'vb')) |
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260 self.assertEqual(len(d), 0) |
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261 self.assertEqual(d.totalcost, 0) |
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262 self.assertIsNone(d.popoldest()) |
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263 |
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264 d['a'] = 'va' |
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265 d['b'] = 'vb' |
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266 d['c'] = 'vc' |
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267 d['d'] = 'vd' |
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268 |
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269 self.assertEqual(d.popoldest(), ('a', 'va')) |
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270 self.assertEqual(len(d), 3) |
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271 for key in ('b', 'c', 'd'): |
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272 self.assertEqual(d[key], 'v%s' % key) |
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273 |
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274 d['a'] = 'va' |
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275 self.assertEqual(d.popoldest(), ('b', 'vb')) |
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276 |
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277 def testmaxcost(self): |
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278 # Item cost is zero by default. |
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279 d = util.lrucachedict(6, maxcost=10) |
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280 d['a'] = 'va' |
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281 d['b'] = 'vb' |
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282 d['c'] = 'vc' |
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283 d['d'] = 'vd' |
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284 self.assertEqual(len(d), 4) |
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285 self.assertEqual(d.totalcost, 0) |
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286 |
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287 d.clear() |
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288 |
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289 # Insertion to exact cost threshold works without eviction. |
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290 d.insert('a', 'va', cost=6) |
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291 d.insert('b', 'vb', cost=4) |
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292 |
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293 self.assertEqual(len(d), 2) |
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294 self.assertEqual(d['a'], 'va') |
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295 self.assertEqual(d['b'], 'vb') |
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296 |
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297 # Inserting a new element with 0 cost works. |
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298 d['c'] = 'vc' |
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299 self.assertEqual(len(d), 3) |
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300 |
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301 # Inserting a new element with cost putting us above high |
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302 # water mark evicts oldest single item. |
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303 d.insert('d', 'vd', cost=1) |
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304 self.assertEqual(len(d), 3) |
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305 self.assertEqual(d.totalcost, 5) |
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306 self.assertNotIn('a', d) |
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307 for key in ('b', 'c', 'd'): |
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308 self.assertEqual(d[key], 'v%s' % key) |
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309 |
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310 # Inserting a new element with enough room for just itself |
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311 # evicts all items before. |
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312 d.insert('e', 've', cost=10) |
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313 self.assertEqual(len(d), 1) |
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314 self.assertEqual(d.totalcost, 10) |
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315 self.assertIn('e', d) |
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316 |
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317 # Inserting a new element with cost greater than threshold |
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318 # still retains that item. |
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319 d.insert('f', 'vf', cost=11) |
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320 self.assertEqual(len(d), 1) |
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321 self.assertEqual(d.totalcost, 11) |
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322 self.assertIn('f', d) |
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323 |
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324 # Inserting a new element will evict the last item since it is |
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325 # too large. |
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326 d['g'] = 'vg' |
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327 self.assertEqual(len(d), 1) |
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328 self.assertEqual(d.totalcost, 0) |
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329 self.assertIn('g', d) |
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330 |
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331 d.clear() |
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332 |
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333 d.insert('a', 'va', cost=7) |
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334 d.insert('b', 'vb', cost=3) |
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335 self.assertEqual(len(d), 2) |
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336 |
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337 # Replacing a value with smaller cost won't result in eviction. |
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338 d.insert('b', 'vb2', cost=2) |
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339 self.assertEqual(len(d), 2) |
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340 |
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341 # Replacing a value with a higher cost will evict when threshold |
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342 # exceeded. |
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343 d.insert('b', 'vb3', cost=4) |
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344 self.assertEqual(len(d), 1) |
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345 self.assertNotIn('a', d) |
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346 |
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347 def testmaxcostcomplex(self): |
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348 d = util.lrucachedict(100, maxcost=100) |
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349 d.insert('a', 'va', cost=9) |
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350 d.insert('b', 'vb', cost=21) |
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351 d.insert('c', 'vc', cost=7) |
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352 d.insert('d', 'vc', cost=50) |
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353 self.assertEqual(d.totalcost, 87) |
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354 |
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355 # Inserting new element should free multiple elements so we hit |
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356 # low water mark. |
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357 d.insert('e', 'vd', cost=25) |
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358 self.assertEqual(len(d), 2) |
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359 self.assertNotIn('a', d) |
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360 self.assertNotIn('b', d) |
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361 self.assertNotIn('c', d) |
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362 self.assertIn('d', d) |
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363 self.assertIn('e', d) |
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364 |
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365 |
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367 silenttestrunner.main(__name__) |