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annotate planemo/lib/python3.7/site-packages/repoze/lru/tests.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 import random
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2 import time
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3 import unittest
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4
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5 try:
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6 range = xrange
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7 except NameError: # pragma: NO COVER (Python3)
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8 pass
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9
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10
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11 class UnboundedCacheTests(unittest.TestCase):
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12
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13 def _getTargetClass(self):
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14 from repoze.lru import UnboundedCache
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15 return UnboundedCache
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16
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17 def _makeOne(self):
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18 return self._getTargetClass()()
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19
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20 def test_ctor(self):
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21 cache = self._makeOne()
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22 self.assertEqual(cache._data, {})
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23
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24 def test_get_miss_no_default(self):
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25 cache = self._makeOne()
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26 self.assertIsNone(cache.get('nonesuch'))
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27
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28 def test_get_miss_explicit_default(self):
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29 cache = self._makeOne()
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30 default = object()
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31 self.assertIs(cache.get('nonesuch', default), default)
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32
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33 def test_get_hit(self):
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34 cache = self._makeOne()
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35 extant = cache._data['extant'] = object()
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36 self.assertIs(cache.get('extant'), extant)
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37
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38 def test_clear(self):
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39 cache = self._makeOne()
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40 extant = cache._data['extant'] = object()
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41 cache.clear()
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42 self.assertIsNone(cache.get('extant'))
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43
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44 def test_invalidate_miss(self):
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45 cache = self._makeOne()
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46 cache.invalidate('nonesuch') # does not raise
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47
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48 def test_invalidate_hit(self):
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49 cache = self._makeOne()
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50 extant = cache._data['extant'] = object()
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51 cache.invalidate('extant')
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52 self.assertIsNone(cache.get('extant'))
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53
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54 def test_put(self):
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55 cache = self._makeOne()
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56 extant = object()
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57 cache.put('extant', extant)
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58 self.assertIs(cache._data['extant'], extant)
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59
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60
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61 class LRUCacheTests(unittest.TestCase):
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62
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63 def _getTargetClass(self):
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64 from repoze.lru import LRUCache
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65 return LRUCache
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66
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67 def _makeOne(self, size):
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68 return self._getTargetClass()(size)
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69
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70 def check_cache_is_consistent(self, cache):
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71 #Return if cache is consistent, else raise fail test case.
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72 # cache.hand/maxpos/size
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73 self.assertTrue(cache.hand < len(cache.clock_keys))
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74 self.assertTrue(cache.hand >= 0)
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75 self.assertEqual(cache.maxpos, cache.size - 1)
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76 self.assertEqual(len(cache.clock_keys), cache.size)
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77
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78 # lengths of data structures
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79 self.assertEqual(len(cache.clock_keys), len(cache.clock_refs))
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80 self.assertTrue(len(cache.data) <= len(cache.clock_refs))
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81
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82 # For each item in cache.data
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83 # 1. pos must be a valid index
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84 # 2. clock_keys must point back to the entry
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85 for key, value in cache.data.items():
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86 pos, val = value
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87 self.assertTrue(
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88 type(pos) == type(42) or
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89 type(pos) == type(2 ** 128))
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90 self.assertTrue(pos >= 0)
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91 self.assertTrue(pos <= cache.maxpos)
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92
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93 clock_key = cache.clock_keys[pos]
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94 self.assertTrue(clock_key is key)
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95 clock_ref = cache.clock_refs[pos]
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96
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97 # All clock_refs must be True or False, nothing else.
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98 for clock_ref in cache.clock_refs:
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99 self.assertTrue(clock_ref is True or clock_ref is False)
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100
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101 def test_size_lessthan_1(self):
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102 self.assertRaises(ValueError, self._makeOne, 0)
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103
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104 def test_get(self):
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105 cache = self._makeOne(1)
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106 # Must support different types of keys
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107 self.assertIsNone(cache.get("foo"))
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108 self.assertIsNone(cache.get(42))
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109 self.assertIsNone(cache.get(("foo", 42)))
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110 self.assertIsNone(cache.get(None))
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111 self.assertIsNone(cache.get(""))
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112 self.assertIsNone(cache.get(object()))
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113 # Check if default value is used
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114 self.assertEqual(cache.get("foo", "bar"), "bar")
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115 self.assertEqual(cache.get("foo", default="bar"), "bar")
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116
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117 self.check_cache_is_consistent(cache)
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118
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119 def test_put(self):
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120 cache = self._makeOne(8)
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121 self.check_cache_is_consistent(cache)
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122 # Must support different types of keys
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123 cache.put("foo", "FOO")
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124 cache.put(42, "fortytwo")
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125 cache.put( ("foo", 42), "tuple_as_key")
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126 cache.put(None, "None_as_key")
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127 cache.put("", "empty_string_as_key")
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128 cache.put(3.141, "float_as_key")
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129 my_object = object()
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130 cache.put(my_object, "object_as_key")
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131
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132 self.check_cache_is_consistent(cache)
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133
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134 self.assertEqual(cache.get("foo"), "FOO")
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135 self.assertEqual(cache.get(42), "fortytwo")
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136 self.assertEqual(cache.get(("foo", 42), "fortytwo"), "tuple_as_key")
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137 self.assertEqual(cache.get(None), "None_as_key")
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138 self.assertEqual(cache.get(""), "empty_string_as_key")
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139 self.assertEqual(cache.get(3.141), "float_as_key")
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140 self.assertEqual(cache.get(my_object), "object_as_key")
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141
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142 # put()ing again must overwrite
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143 cache.put(42, "fortytwo again")
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144 self.assertEqual(cache.get(42), "fortytwo again")
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145
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146 self.check_cache_is_consistent(cache)
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147
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148 def test_invalidate(self):
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149 cache = self._makeOne(3)
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150 cache.put("foo", "bar")
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151 cache.put("FOO", "BAR")
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152
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153 cache.invalidate("foo")
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154 self.assertIsNone(cache.get("foo"))
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155 self.assertEqual(cache.get("FOO"), "BAR")
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156 self.check_cache_is_consistent(cache)
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157
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158 cache.invalidate("FOO")
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159 self.assertIsNone(cache.get("foo"))
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160 self.assertIsNone(cache.get("FOO"))
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161 self.assertEqual(cache.data, {})
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162 self.check_cache_is_consistent(cache)
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163
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164 cache.put("foo", "bar")
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165 cache.invalidate("nonexistingkey")
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166 self.assertEqual(cache.get("foo"), "bar")
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167 self.assertIsNone(cache.get("FOO"))
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168 self.check_cache_is_consistent(cache)
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169
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170 def test_small_cache(self):
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171 #Cache of size 1 must work
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172 cache = self._makeOne(1)
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173
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174 cache.put("foo", "bar")
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175 self.assertEqual(cache.get("foo"), "bar")
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176 self.check_cache_is_consistent(cache)
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177
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178 cache.put("FOO", "BAR")
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179 self.assertEqual(cache.get("FOO"), "BAR")
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180 self.assertIsNone(cache.get("foo"))
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181 self.check_cache_is_consistent(cache)
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182
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183 # put() again
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184 cache.put("FOO", "BAR")
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185 self.assertEqual(cache.get("FOO"), "BAR")
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186 self.assertIsNone(cache.get("foo"))
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187 self.check_cache_is_consistent(cache)
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188
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189 # invalidate()
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190 cache.invalidate("FOO")
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191 self.check_cache_is_consistent(cache)
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192 self.assertIsNone(cache.get("FOO"))
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193 self.assertIsNone(cache.get("foo"))
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194
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195 # clear()
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196 cache.put("foo", "bar")
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197 self.assertEqual(cache.get("foo"), "bar")
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198 cache.clear()
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199 self.check_cache_is_consistent(cache)
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200 self.assertIsNone(cache.get("FOO"))
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201 self.assertIsNone(cache.get("foo"))
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202
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203 def test_equal_but_not_identical(self):
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204 #equal but not identical keys must be treated the same
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205 cache = self._makeOne(1)
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206 tuple_one = (1, 1)
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207 tuple_two = (1, 1)
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208 cache.put(tuple_one, 42)
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209
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210 self.assertEqual(cache.get(tuple_one), 42)
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211 self.assertEqual(cache.get(tuple_two), 42)
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212 self.check_cache_is_consistent(cache)
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213
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214 cache = self._makeOne(1)
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215 cache.put(tuple_one, 42)
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216 cache.invalidate(tuple_two)
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217 self.assertIsNone(cache.get(tuple_one))
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218 self.assertIsNone(cache.get(tuple_two))
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219
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220 def test_perfect_hitrate(self):
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221 #If cache size equals number of items, expect 100% cache hits
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222 size = 1000
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223 cache = self._makeOne(size)
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224
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225 for count in range(size):
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226 cache.put(count, "item%s" % count)
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227
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228 for cache_op in range(10000):
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229 item = random.randrange(0, size - 1)
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230 if random.getrandbits(1):
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231 self.assertEqual(cache.get(item), "item%s" % item)
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232 else:
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233 cache.put(item, "item%s" % item)
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234
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235 self.assertEqual(cache.misses, 0)
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236 self.assertEqual(cache.evictions, 0)
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237
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238 self.check_cache_is_consistent(cache)
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239
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240 def test_imperfect_hitrate(self):
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241 #If cache size == half the number of items -> hit rate ~50%
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242 size = 1000
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243 cache = self._makeOne(size / 2)
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244
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245 for count in range(size):
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246 cache.put(count, "item%s" % count)
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247
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248 hits = 0
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249 misses = 0
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250 total_gets = 0
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251 for cache_op in range(10000):
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252 item = random.randrange(0, size - 1)
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253 if random.getrandbits(1):
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254 entry = cache.get(item)
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255 total_gets += 1
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256 self.assertTrue(
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257 (entry == "item%s" % item) or
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258 entry is None)
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259 if entry is None:
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260 misses += 1
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261 else:
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262 hits += 1
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263 else:
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264 cache.put(item, "item%s" % item)
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265
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266 # Cache hit rate should be roughly 50%
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267 hit_ratio = hits / float(total_gets) * 100
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268 self.assertTrue(hit_ratio > 45)
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269 self.assertTrue(hit_ratio < 55)
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270
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271 # The internal cache counters should have the same information
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272 internal_hit_ratio = 100 * cache.hits / cache.lookups
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273 self.assertTrue(internal_hit_ratio > 45)
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274 self.assertTrue(internal_hit_ratio < 55)
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275
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276 # The internal miss counters should also be around 50%
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277 internal_miss_ratio = 100 * cache.misses / cache.lookups
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278 self.assertTrue(internal_miss_ratio > 45)
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279 self.assertTrue(internal_miss_ratio < 55)
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280
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281 self.check_cache_is_consistent(cache)
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282
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283 def test_eviction_counter(self):
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284 cache = self._makeOne(2)
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285 cache.put(1, 1)
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286 cache.put(2, 1)
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287 self.assertEqual(cache.evictions, 0)
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288
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289 cache.put(3, 1)
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290 cache.put(4, 1)
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291 self.assertEqual(cache.evictions, 2)
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292
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293 cache.put(3, 1)
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294 cache.put(4, 1)
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295 self.assertEqual(cache.evictions, 2)
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296
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297 cache.clear()
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298 self.assertEqual(cache.evictions, 0)
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299
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300
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301 def test_it(self):
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302 cache = self._makeOne(3)
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303 self.assertIsNone(cache.get('a'))
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304
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305 cache.put('a', '1')
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306 pos, value = cache.data.get('a')
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307 self.assertEqual(cache.clock_refs[pos], True)
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308 self.assertEqual(cache.clock_keys[pos], 'a')
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309 self.assertEqual(value, '1')
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310 self.assertEqual(cache.get('a'), '1')
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311 self.assertEqual(cache.hand, pos + 1)
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312
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313 pos, value = cache.data.get('a')
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314 self.assertEqual(cache.clock_refs[pos], True)
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315 self.assertEqual(cache.hand, pos + 1)
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316 self.assertEqual(len(cache.data), 1)
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317
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318 cache.put('b', '2')
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319 pos, value = cache.data.get('b')
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320 self.assertEqual(cache.clock_refs[pos], True)
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321 self.assertEqual(cache.clock_keys[pos], 'b')
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322 self.assertEqual(len(cache.data), 2)
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323
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324 cache.put('c', '3')
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325 pos, value = cache.data.get('c')
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326 self.assertEqual(cache.clock_refs[pos], True)
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327 self.assertEqual(cache.clock_keys[pos], 'c')
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328 self.assertEqual(len(cache.data), 3)
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329
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330 pos, value = cache.data.get('a')
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331 self.assertEqual(cache.clock_refs[pos], True)
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332
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333 cache.get('a')
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334 # All items have ref==True. cache.hand points to "a". Putting
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335 # "d" will set ref=False on all items and then replace "a",
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336 # because "a" is the first item with ref==False that is found.
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337 cache.put('d', '4')
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338 self.assertEqual(len(cache.data), 3)
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339 self.assertIsNone(cache.data.get('a'))
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340
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341 # Only item "d" has ref==True. cache.hand points at "b", so "b"
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342 # will be evicted when "e" is inserted. "c" will be left alone.
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343 cache.put('e', '5')
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344 self.assertEqual(len(cache.data), 3)
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345 self.assertIsNone(cache.data.get('b'))
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346 self.assertEqual(cache.get('d'), '4')
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347 self.assertEqual(cache.get('e'), '5')
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348 self.assertIsNone(cache.get('a'))
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349 self.assertIsNone(cache.get('b'))
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350 self.assertEqual(cache.get('c'), '3')
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351
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352 self.check_cache_is_consistent(cache)
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353
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354
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355 class ExpiringLRUCacheTests(LRUCacheTests):
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356
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357 def _getTargetClass(self):
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358 from repoze.lru import ExpiringLRUCache
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359 return ExpiringLRUCache
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360
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361 def _makeOne(self, size, default_timeout=None):
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362 if default_timeout is None:
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363 return self._getTargetClass()(size)
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364 else:
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365 return self._getTargetClass()(
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366 size, default_timeout=default_timeout)
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367
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368 def check_cache_is_consistent(self, cache):
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369 #Return if cache is consistent, else raise fail test case.
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370 #
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371 #This is slightly different for ExpiringLRUCache since self.data
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372 #contains 3-tuples instead of 2-tuples.
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373 # cache.hand/maxpos/size
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374 self.assertTrue(cache.hand < len(cache.clock_keys))
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375 self.assertTrue(cache.hand >= 0)
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376 self.assertEqual(cache.maxpos, cache.size - 1)
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377 self.assertEqual(len(cache.clock_keys), cache.size)
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378
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379 # lengths of data structures
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380 self.assertEqual(len(cache.clock_keys), len(cache.clock_refs))
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381 self.assertTrue(len(cache.data) <= len(cache.clock_refs))
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382
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383 # For each item in cache.data
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384 # 1. pos must be a valid index
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385 # 2. clock_keys must point back to the entry
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386 for key, value in cache.data.items():
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387 pos, val, timeout = value
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388 self.assertTrue(
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389 type(pos) == type(42) or type(pos) == type(2 ** 128))
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390 self.assertTrue(pos >= 0)
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391 self.assertTrue(pos <= cache.maxpos)
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392
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393 clock_key = cache.clock_keys[pos]
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394 self.assertTrue(clock_key is key)
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395 clock_ref = cache.clock_refs[pos]
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396
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397 self.assertTrue(type(timeout) == type(3.141))
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398
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399 # All clock_refs must be True or False, nothing else.
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400 for clock_ref in cache.clock_refs:
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401 self.assertTrue(clock_ref is True or clock_ref is False)
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402
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403 def test_it(self):
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404 #Test a sequence of operations
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405 #
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406 # Looks at internal data, which is different for ExpiringLRUCache.
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407 cache = self._makeOne(3)
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408 self.assertIsNone(cache.get('a'))
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409
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410 cache.put('a', '1')
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411 pos, value, expires = cache.data.get('a')
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412 self.assertEqual(cache.clock_refs[pos], True)
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413 self.assertEqual(cache.clock_keys[pos], 'a')
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414 self.assertEqual(value, '1')
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415 self.assertEqual(cache.get('a'), '1')
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416 self.assertEqual(cache.hand, pos + 1)
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417
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418 pos, value, expires = cache.data.get('a')
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419 self.assertEqual(cache.clock_refs[pos], True)
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420 self.assertEqual(cache.hand, pos + 1)
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421 self.assertEqual(len(cache.data), 1)
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422
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423 cache.put('b', '2')
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424 pos, value, expires = cache.data.get('b')
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425 self.assertEqual(cache.clock_refs[pos], True)
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426 self.assertEqual(cache.clock_keys[pos], 'b')
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427 self.assertEqual(len(cache.data), 2)
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428
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429 cache.put('c', '3')
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430 pos, value, expires = cache.data.get('c')
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431 self.assertEqual(cache.clock_refs[pos], True)
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432 self.assertEqual(cache.clock_keys[pos], 'c')
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433 self.assertEqual(len(cache.data), 3)
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434
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435 pos, value, expires = cache.data.get('a')
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436 self.assertEqual(cache.clock_refs[pos], True)
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437
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438 cache.get('a')
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439 # All items have ref==True. cache.hand points to "a". Putting
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440 # "d" will set ref=False on all items and then replace "a",
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441 # because "a" is the first item with ref==False that is found.
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442 cache.put('d', '4')
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443 self.assertEqual(len(cache.data), 3)
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444 self.assertIsNone(cache.data.get('a'))
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445
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446 # Only item "d" has ref==True. cache.hand points at "b", so "b"
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447 # will be evicted when "e" is inserted. "c" will be left alone.
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448 cache.put('e', '5')
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449 self.assertEqual(len(cache.data), 3)
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450 self.assertIsNone(cache.data.get('b'))
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451 self.assertEqual(cache.get('d'), '4')
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452 self.assertEqual(cache.get('e'), '5')
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453 self.assertIsNone(cache.get('a'))
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454 self.assertIsNone(cache.get('b'))
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455 self.assertEqual(cache.get('c'), '3')
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456
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457 self.check_cache_is_consistent(cache)
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458
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459 def test_default_timeout(self):
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460 #Default timeout provided at init time must be applied.
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461 # Provide no default timeout -> entries must remain valid
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462 cache = self._makeOne(3)
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463 cache.put("foo", "bar")
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464
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465 time.sleep(0.1)
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466 cache.put("FOO", "BAR")
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467 self.assertEqual(cache.get("foo"), "bar")
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468 self.assertEqual(cache.get("FOO"), "BAR")
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469 self.check_cache_is_consistent(cache)
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470
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471 # Provide short default timeout -> entries must become invalid
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472 cache = self._makeOne(3, default_timeout=0.1)
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473 cache.put("foo", "bar")
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474
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475 time.sleep(0.1)
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476 cache.put("FOO", "BAR")
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477 self.assertIsNone(cache.get("foo"))
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478 self.assertEqual(cache.get("FOO"), "BAR")
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479 self.check_cache_is_consistent(cache)
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480
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481 def test_different_timeouts(self):
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482 #Timeouts must be per entry, default applied when none provided
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483 cache = self._makeOne(3, default_timeout=0.1)
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484
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485 cache.put("one", 1)
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486 cache.put("two", 2, timeout=0.2)
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487 cache.put("three", 3, timeout=0.3)
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488
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489 # All entries still here
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490 self.assertEqual(cache.get("one"), 1)
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491 self.assertEqual(cache.get("two"), 2)
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492 self.assertEqual(cache.get("three"), 3)
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493
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494 # Entry "one" must expire, "two"/"three" remain valid
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495 time.sleep(0.1)
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496 self.assertIsNone(cache.get("one"))
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497 self.assertEqual(cache.get("two"), 2)
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498 self.assertEqual(cache.get("three"), 3)
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499
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500 # Only "three" remains valid
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501 time.sleep(0.1)
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502 self.assertIsNone(cache.get("one"))
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503 self.assertIsNone(cache.get("two"))
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504 self.assertEqual(cache.get("three"), 3)
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505
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506 # All have expired
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507 time.sleep(0.1)
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508 self.assertIsNone(cache.get("one"))
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509 self.assertIsNone(cache.get("two"))
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510 self.assertIsNone(cache.get("three"))
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511
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512 self.check_cache_is_consistent(cache)
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513
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514 def test_renew_timeout(self):
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515 #Re-putting an entry must update timeout
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516 cache = self._makeOne(3, default_timeout=0.2)
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517
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518 cache.put("foo", "bar")
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519 cache.put("foo2", "bar2", timeout=10)
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520 cache.put("foo3", "bar3", timeout=10)
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521
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522 time.sleep(0.1)
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523 # All must still be here
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524 self.assertEqual(cache.get("foo"), "bar")
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525 self.assertEqual(cache.get("foo2"), "bar2")
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526 self.assertEqual(cache.get("foo3"), "bar3")
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527 self.check_cache_is_consistent(cache)
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528
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529 # Set new timeouts by re-put()ing the entries
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530 cache.put("foo", "bar")
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531 cache.put("foo2", "bar2", timeout=0.1)
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532 cache.put("foo3", "bar3")
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533
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534 time.sleep(0.1)
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535 # "foo2" must have expired
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536 self.assertEqual(cache.get("foo"), "bar")
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537 self.assertIsNone(cache.get("foo2"))
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538 self.assertEqual(cache.get("foo3"), "bar3")
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539 self.check_cache_is_consistent(cache)
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540
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541
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542 class DecoratorTests(unittest.TestCase):
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543
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544 def _getTargetClass(self):
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545 from repoze.lru import lru_cache
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546 return lru_cache
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547
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548 def _makeOne(self, *args, **kw):
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549 return self._getTargetClass()(*args, **kw)
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550
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551 def test_ctor_no_size(self):
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552 from repoze.lru import UnboundedCache
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553 decorator = self._makeOne(maxsize=None)
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554 self.assertIsInstance(decorator.cache, UnboundedCache)
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555 self.assertEqual(decorator.cache._data, {})
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556
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557 def test_ctor_w_size_no_timeout(self):
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558 from repoze.lru import LRUCache
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559 decorator = self._makeOne(maxsize=10)
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560 self.assertIsInstance(decorator.cache, LRUCache)
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561 self.assertEqual(decorator.cache.size, 10)
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562
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563 def test_ctor_w_size_w_timeout(self):
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564 from repoze.lru import ExpiringLRUCache
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565 decorator = self._makeOne(maxsize=10, timeout=30)
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566 self.assertIsInstance(decorator.cache, ExpiringLRUCache)
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567 self.assertEqual(decorator.cache.size, 10)
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568 self.assertEqual(decorator.cache.default_timeout, 30)
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569
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570 def test_ctor_nocache(self):
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571 decorator = self._makeOne(10, None)
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572 self.assertEqual(decorator.cache.size, 10)
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573
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574 def test_singlearg(self):
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575 cache = DummyLRUCache()
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576 decorator = self._makeOne(0, cache)
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577 def wrapped(key):
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578 return key
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579 decorated = decorator(wrapped)
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580 result = decorated(1)
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581 self.assertEqual(cache[(1,)], 1)
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582 self.assertEqual(result, 1)
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583 self.assertEqual(len(cache), 1)
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584 result = decorated(2)
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585 self.assertEqual(cache[(2,)], 2)
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586 self.assertEqual(result, 2)
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587 self.assertEqual(len(cache), 2)
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588 result = decorated(2)
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589 self.assertEqual(cache[(2,)], 2)
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590 self.assertEqual(result, 2)
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591 self.assertEqual(len(cache), 2)
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592
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593 def test_cache_attr(self):
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594 cache = DummyLRUCache()
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595 decorator = self._makeOne(0, cache)
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596 def wrapped(key): #pragma NO COVER
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597 return key
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598 decorated = decorator(wrapped)
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599 self.assertTrue(decorated._cache is cache)
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600
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601 def test_multiargs(self):
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602 cache = DummyLRUCache()
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603 decorator = self._makeOne(0, cache)
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604 def moreargs(*args):
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605 return args
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606 decorated = decorator(moreargs)
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607 result = decorated(3, 4, 5)
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608 self.assertEqual(cache[(3, 4, 5)], (3, 4, 5))
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609 self.assertEqual(result, (3, 4, 5))
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610 self.assertEqual(len(cache), 1)
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611
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612 def test_multiargs_keywords(self):
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613 cache = DummyLRUCache()
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614 decorator = self._makeOne(0, cache)
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615 def moreargs(*args, **kwargs):
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616 return args, kwargs
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617 decorated = decorator(moreargs)
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618 result = decorated(3, 4, 5, a=1, b=2, c=3)
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619 self.assertEqual(
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620 cache[((3, 4, 5), frozenset([ ('a',1), ('b',2), ('c',3) ]))],
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621 ((3, 4, 5), {'a':1, 'b':2, 'c':3}))
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622 self.assertEqual(result, ((3, 4, 5), {'a':1, 'b':2, 'c':3}))
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623 self.assertEqual(len(cache), 1)
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624
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625 def test_multiargs_keywords_ignore_unhashable_true(self):
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626 cache = DummyLRUCache()
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627 decorator = self._makeOne(0, cache, ignore_unhashable_args=True)
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628 def moreargs(*args, **kwargs):
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629 return args, kwargs
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630 decorated = decorator(moreargs)
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631 result = decorated(3, 4, 5, a=1, b=[1, 2, 3])
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632 self.assertEqual(len(cache), 0)
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633 self.assertEqual(result, ((3, 4, 5), {'a':1, 'b':[1, 2, 3]}))
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634
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635 def test_multiargs_keywords_ignore_unhashable(self):
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636 cache = DummyLRUCache()
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637 decorator = self._makeOne(0, cache, ignore_unhashable_args=False)
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638
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639 def moreargs(*args, **kwargs): # pragma: NO COVER
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640 return args, kwargs
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641
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642 decorated = decorator(moreargs)
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643
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644 with self.assertRaises(TypeError):
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645 decorated(3, 4, 5, a=1, b=[1, 2, 3])
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646
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647 def test_expiry(self):
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648 #When timeout is given, decorator must eventually forget entries
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649 @self._makeOne(1, None, timeout=0.1)
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650 def sleep_a_bit(param):
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651 time.sleep(0.1)
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652 return 2 * param
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653
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654 # First call must take at least 0.1 seconds
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655 start = time.time()
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656 result1 = sleep_a_bit("hello")
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657 stop = time.time()
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658 self.assertEqual(result1, 2 * "hello")
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659 self.assertTrue(stop - start > 0.1)
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660
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661 # Second call must take less than 0.1 seconds.
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662 start = time.time()
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663 result2 = sleep_a_bit("hello")
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664 stop = time.time()
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665 self.assertEqual(result2, 2 * "hello")
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666 self.assertTrue(stop - start < 0.1)
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667
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668 time.sleep(0.1)
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669 # This one must calculate again and take at least 0.1 seconds
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670 start = time.time()
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671 result3 = sleep_a_bit("hello")
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672 stop = time.time()
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673 self.assertEqual(result3, 2 * "hello")
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674 self.assertTrue(stop - start > 0.1)
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675
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676 def test_partial(self):
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677 #lru_cache decorator must not crash on functools.partial instances
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678 def add(a,b):
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679 return a + b
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680 from functools import partial
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681 from repoze.lru import lru_cache
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682 add_five = partial(add, 5)
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683 decorated = lru_cache(20)(add_five)
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684 self.assertEqual(decorated(3), 8)
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685
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686
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687 class DummyLRUCache(dict):
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688
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689 def put(self, k, v):
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690 return self.__setitem__(k, v)
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691
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692
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693 class CacherMaker(unittest.TestCase):
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694
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695 def _getTargetClass(self):
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696 from repoze.lru import CacheMaker
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697 return CacheMaker
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698
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699 def _makeOne(self, *args, **kw):
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700 return self._getTargetClass()(*args, **kw)
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701
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702 def test_named_cache(self):
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703 maker = self._makeOne()
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704 size = 10
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705 name = "name"
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706 decorated = maker.lrucache(maxsize=size, name=name)(_adder)
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707 self.assertEqual(list(maker._cache.keys()), [name])
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708 self.assertEqual(maker._cache[name].size, size)
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709 decorated(10)
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710 decorated(11)
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711 self.assertEqual(len(maker._cache[name].data),2)
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712
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713 def test_exception(self):
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714 maker = self._makeOne()
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715 size = 10
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716 name = "name"
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717 decorated = maker.lrucache(maxsize=size, name=name)(_adder)
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718 self.assertRaises(KeyError, maker.lrucache, maxsize=size, name=name)
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719 self.assertRaises(ValueError, maker.lrucache)
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720
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721 def test_defaultvalue_and_clear(self):
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722 size = 10
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723 maker = self._makeOne(maxsize=size)
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724 for i in range(100):
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725 decorated = maker.lrucache()(_adder)
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726 decorated(10)
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727
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728 self.assertEqual(len(maker._cache) , 100)
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729 for _cache in maker._cache.values():
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730 self.assertEqual( _cache.size,size)
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731 self.assertEqual(len(_cache.data),1)
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732 ## and test clear cache
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733 maker.clear()
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734 for _cache in maker._cache.values():
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735 self.assertEqual( _cache.size,size)
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736 self.assertEqual(len(_cache.data),0)
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737
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738 def test_clear_with_single_name(self):
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739 maker = self._makeOne(maxsize=10)
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740 one = maker.lrucache(name='one')(_adder)
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741 two = maker.lrucache(name='two')(_adder)
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742 for i in range(100):
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743 _ = one(i)
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744 _ = two(i)
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745 self.assertEqual(len(maker._cache['one'].data), 10)
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746 self.assertEqual(len(maker._cache['two'].data), 10)
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747 maker.clear('one')
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748 self.assertEqual(len(maker._cache['one'].data), 0)
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749 self.assertEqual(len(maker._cache['two'].data), 10)
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750
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751 def test_clear_with_multiple_names(self):
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752 maker = self._makeOne(maxsize=10)
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753 one = maker.lrucache(name='one')(_adder)
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754 two = maker.lrucache(name='two')(_adder)
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755 three = maker.lrucache(name='three')(_adder)
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756 for i in range(100):
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757 _ = one(i)
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758 _ = two(i)
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759 _ = three(i)
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760 self.assertEqual(len(maker._cache['one'].data), 10)
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761 self.assertEqual(len(maker._cache['two'].data), 10)
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762 self.assertEqual(len(maker._cache['three'].data), 10)
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763 maker.clear('one', 'three')
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764 self.assertEqual(len(maker._cache['one'].data), 0)
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765 self.assertEqual(len(maker._cache['two'].data), 10)
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766 self.assertEqual(len(maker._cache['three'].data), 0)
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parents:
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767
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768 def test_memoized(self):
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769 from repoze.lru import lru_cache
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parents:
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770 from repoze.lru import UnboundedCache
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771 maker = self._makeOne(maxsize=10)
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772 memo = maker.memoized('test')
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773 self.assertIsInstance(memo, lru_cache)
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parents:
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774 self.assertIsInstance(memo.cache, UnboundedCache)
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guerler
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775 self.assertIs(memo.cache, maker._cache['test'])
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parents:
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776
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777 def test_expiring(self):
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778 size = 10
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779 timeout = 10
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780 name = "name"
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781 cache = self._makeOne(maxsize=size, timeout=timeout)
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guerler
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782 for i in range(100):
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783 if not i:
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784 decorator = cache.expiring_lrucache(name=name)
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guerler
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diff changeset
785 decorated = decorator(_adder)
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diff changeset
786 self.assertEqual( cache._cache[name].size,size)
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787 else:
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788 decorator = cache.expiring_lrucache()
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parents:
diff changeset
789 decorated = decorator(_adder)
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diff changeset
790 self.assertEqual(decorator.cache.default_timeout, timeout)
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guerler
parents:
diff changeset
791 decorated(10)
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792
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793 self.assertEqual( len(cache._cache) , 100)
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guerler
parents:
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794 for _cache in cache._cache.values():
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guerler
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diff changeset
795 self.assertEqual( _cache.size,size)
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diff changeset
796 self.assertEqual( _cache.default_timeout,timeout)
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diff changeset
797 self.assertEqual(len(_cache.data),1)
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guerler
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798 ## and test clear cache
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diff changeset
799 cache.clear()
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parents:
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800 for _cache in cache._cache.values():
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guerler
parents:
diff changeset
801 self.assertEqual( _cache.size,size)
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guerler
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diff changeset
802 self.assertEqual(len(_cache.data),0)
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guerler
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803
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parents:
diff changeset
804 def test_expiring_w_timeout(self):
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805 size = 10
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806 maker_timeout = 10
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807 timeout = 20
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808 name = "name"
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809 cache = self._makeOne(maxsize=size, timeout=maker_timeout)
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guerler
parents:
diff changeset
810 decorator = cache.expiring_lrucache(name=name, timeout=20)
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parents:
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811 self.assertEqual(decorator.cache.default_timeout, timeout)
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812
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813 def _adder(x):
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814 return x + 10