Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_structseq.py @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents 89e405e6a7a9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import os
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2 import time
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3 import unittest
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4 from test import support
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5
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6
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7 class StructSeqTest(unittest.TestCase):
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8
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9 def test_tuple(self):
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10 t = time.gmtime()
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11 self.assertIsInstance(t, tuple)
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12 astuple = tuple(t)
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13 self.assertEqual(len(t), len(astuple))
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14 self.assertEqual(t, astuple)
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15
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16 # Check that slicing works the same way; at one point, slicing t[i:j] with
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17 # 0 < i < j could produce NULLs in the result.
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18 for i in range(-len(t), len(t)):
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19 self.assertEqual(t[i:], astuple[i:])
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20 for j in range(-len(t), len(t)):
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21 self.assertEqual(t[i:j], astuple[i:j])
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22
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23 for j in range(-len(t), len(t)):
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24 self.assertEqual(t[:j], astuple[:j])
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25
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26 self.assertRaises(IndexError, t.__getitem__, -len(t)-1)
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27 self.assertRaises(IndexError, t.__getitem__, len(t))
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28 for i in range(-len(t), len(t)-1):
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29 self.assertEqual(t[i], astuple[i])
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30
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31 def test_repr(self):
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32 t = time.gmtime()
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33 self.assertTrue(repr(t))
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34 t = time.gmtime(0)
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35 self.assertEqual(repr(t),
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36 "time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, "
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37 "tm_min=0, tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)")
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38 # os.stat() gives a complicated struct sequence.
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39 st = os.stat(__file__)
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40 rep = repr(st)
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41 self.assertTrue(rep.startswith("os.stat_result"))
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42 self.assertIn("st_mode=", rep)
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43 self.assertIn("st_ino=", rep)
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44 self.assertIn("st_dev=", rep)
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45
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46 def test_concat(self):
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47 t1 = time.gmtime()
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48 t2 = t1 + tuple(t1)
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49 for i in range(len(t1)):
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50 self.assertEqual(t2[i], t2[i+len(t1)])
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51
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52 def test_repeat(self):
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53 t1 = time.gmtime()
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54 t2 = 3 * t1
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55 for i in range(len(t1)):
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56 self.assertEqual(t2[i], t2[i+len(t1)])
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57 self.assertEqual(t2[i], t2[i+2*len(t1)])
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58
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59 def test_contains(self):
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60 t1 = time.gmtime()
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61 for item in t1:
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62 self.assertIn(item, t1)
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63 self.assertNotIn(-42, t1)
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64
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65 def test_hash(self):
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66 t1 = time.gmtime()
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67 self.assertEqual(hash(t1), hash(tuple(t1)))
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68
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69 def test_cmp(self):
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70 t1 = time.gmtime()
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71 t2 = type(t1)(t1)
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72 self.assertEqual(t1, t2)
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73 self.assertTrue(not (t1 < t2))
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74 self.assertTrue(t1 <= t2)
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75 self.assertTrue(not (t1 > t2))
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76 self.assertTrue(t1 >= t2)
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77 self.assertTrue(not (t1 != t2))
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78
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79 def test_fields(self):
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80 t = time.gmtime()
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81 self.assertEqual(len(t), t.n_sequence_fields)
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82 self.assertEqual(t.n_unnamed_fields, 0)
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83 self.assertEqual(t.n_fields, time._STRUCT_TM_ITEMS)
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84
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85 def test_constructor(self):
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86 t = time.struct_time
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87
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88 self.assertRaises(TypeError, t)
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89 self.assertRaises(TypeError, t, None)
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90 self.assertRaises(TypeError, t, "123")
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91 self.assertRaises(TypeError, t, "123", dict={})
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92 self.assertRaises(TypeError, t, "123456789", dict=None)
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93
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94 s = "123456789"
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95 self.assertEqual("".join(t(s)), s)
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96
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97 def test_eviltuple(self):
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98 class Exc(Exception):
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99 pass
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100
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101 # Devious code could crash structseqs' contructors
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102 class C:
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103 def __getitem__(self, i):
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104 raise Exc
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105 def __len__(self):
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106 return 9
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107
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108 self.assertRaises(Exc, time.struct_time, C())
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109
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110 def test_reduce(self):
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111 t = time.gmtime()
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112 x = t.__reduce__()
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113
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114 def test_extended_getslice(self):
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115 # Test extended slicing by comparing with list slicing.
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116 t = time.gmtime()
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117 L = list(t)
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118 indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300)
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119 for start in indices:
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120 for stop in indices:
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121 # Skip step 0 (invalid)
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122 for step in indices[1:]:
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123 self.assertEqual(list(t[start:stop:step]),
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124 L[start:stop:step])
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125
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126 def test_main():
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127 support.run_unittest(StructSeqTest)
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128
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129 if __name__ == "__main__":
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130 test_main()