Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_sys.py @ 47628:d15d8680a00a

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Fixed test_sys failure due to removal of the unused slots in PyNumberMethods.
author Alexandre Vassalotti <alexandre@peadrop.com>
date Thu, 12 Jun 2008 00:23:43 +0000
parents 94f64f11fdd0
children 0b1c01eec788
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # -*- coding: iso-8859-1 -*-
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2 import unittest, test.support
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3 import sys, io, os
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4
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5 class SysModuleTest(unittest.TestCase):
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6
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7 def setUp(self):
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8 self.orig_stdout = sys.stdout
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9 self.orig_stderr = sys.stderr
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10 self.orig_displayhook = sys.displayhook
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11
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12 def tearDown(self):
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13 sys.stdout = self.orig_stdout
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14 sys.stderr = self.orig_stderr
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15 sys.displayhook = self.orig_displayhook
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16
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17 def test_original_displayhook(self):
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18 import builtins
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19 out = io.StringIO()
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20 sys.stdout = out
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21
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22 dh = sys.__displayhook__
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23
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24 self.assertRaises(TypeError, dh)
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25 if hasattr(builtins, "_"):
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26 del builtins._
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27
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28 dh(None)
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29 self.assertEqual(out.getvalue(), "")
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30 self.assert_(not hasattr(builtins, "_"))
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31 dh(42)
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32 self.assertEqual(out.getvalue(), "42\n")
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33 self.assertEqual(builtins._, 42)
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34
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35 del sys.stdout
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36 self.assertRaises(RuntimeError, dh, 42)
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37
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38 def test_lost_displayhook(self):
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39 del sys.displayhook
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40 code = compile("42", "<string>", "single")
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41 self.assertRaises(RuntimeError, eval, code)
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42
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43 def test_custom_displayhook(self):
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44 def baddisplayhook(obj):
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45 raise ValueError
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46 sys.displayhook = baddisplayhook
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47 code = compile("42", "<string>", "single")
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48 self.assertRaises(ValueError, eval, code)
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49
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50 def test_original_excepthook(self):
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51 err = io.StringIO()
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52 sys.stderr = err
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53
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54 eh = sys.__excepthook__
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55
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56 self.assertRaises(TypeError, eh)
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57 try:
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58 raise ValueError(42)
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59 except ValueError as exc:
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60 eh(*sys.exc_info())
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61
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62 self.assert_(err.getvalue().endswith("ValueError: 42\n"))
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63
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64 # FIXME: testing the code for a lost or replaced excepthook in
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65 # Python/pythonrun.c::PyErr_PrintEx() is tricky.
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66
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67 def test_exit(self):
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68 self.assertRaises(TypeError, sys.exit, 42, 42)
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69
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70 # call without argument
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71 try:
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72 sys.exit(0)
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73 except SystemExit as exc:
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74 self.assertEquals(exc.code, 0)
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75 except:
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76 self.fail("wrong exception")
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77 else:
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78 self.fail("no exception")
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79
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80 # call with tuple argument with one entry
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81 # entry will be unpacked
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82 try:
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83 sys.exit(42)
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84 except SystemExit as exc:
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85 self.assertEquals(exc.code, 42)
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86 except:
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87 self.fail("wrong exception")
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88 else:
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89 self.fail("no exception")
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90
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91 # call with integer argument
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92 try:
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93 sys.exit((42,))
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94 except SystemExit as exc:
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95 self.assertEquals(exc.code, 42)
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96 except:
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97 self.fail("wrong exception")
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98 else:
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99 self.fail("no exception")
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100
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101 # call with string argument
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102 try:
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103 sys.exit("exit")
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104 except SystemExit as exc:
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105 self.assertEquals(exc.code, "exit")
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106 except:
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107 self.fail("wrong exception")
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108 else:
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109 self.fail("no exception")
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110
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111 # call with tuple argument with two entries
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112 try:
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113 sys.exit((17, 23))
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114 except SystemExit as exc:
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115 self.assertEquals(exc.code, (17, 23))
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116 except:
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117 self.fail("wrong exception")
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118 else:
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119 self.fail("no exception")
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120
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121 # test that the exit machinery handles SystemExits properly
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122 import subprocess
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123 rc = subprocess.call([sys.executable, "-c",
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124 "raise SystemExit(47)"])
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125 self.assertEqual(rc, 47)
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126
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127 def test_getdefaultencoding(self):
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128 self.assertRaises(TypeError, sys.getdefaultencoding, 42)
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129 # can't check more than the type, as the user might have changed it
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130 self.assert_(isinstance(sys.getdefaultencoding(), str))
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131
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132 # testing sys.settrace() is done in test_trace.py
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133 # testing sys.setprofile() is done in test_profile.py
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134
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135 def test_setcheckinterval(self):
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136 self.assertRaises(TypeError, sys.setcheckinterval)
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137 orig = sys.getcheckinterval()
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138 for n in 0, 100, 120, orig: # orig last to restore starting state
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139 sys.setcheckinterval(n)
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140 self.assertEquals(sys.getcheckinterval(), n)
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141
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142 def test_recursionlimit(self):
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143 self.assertRaises(TypeError, sys.getrecursionlimit, 42)
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144 oldlimit = sys.getrecursionlimit()
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145 self.assertRaises(TypeError, sys.setrecursionlimit)
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146 self.assertRaises(ValueError, sys.setrecursionlimit, -42)
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147 sys.setrecursionlimit(10000)
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148 self.assertEqual(sys.getrecursionlimit(), 10000)
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149 sys.setrecursionlimit(oldlimit)
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150
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151 def test_getwindowsversion(self):
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152 if hasattr(sys, "getwindowsversion"):
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153 v = sys.getwindowsversion()
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154 self.assert_(isinstance(v, tuple))
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155 self.assertEqual(len(v), 5)
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156 self.assert_(isinstance(v[0], int))
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157 self.assert_(isinstance(v[1], int))
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158 self.assert_(isinstance(v[2], int))
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159 self.assert_(isinstance(v[3], int))
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160 self.assert_(isinstance(v[4], str))
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161
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162 def test_dlopenflags(self):
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163 if hasattr(sys, "setdlopenflags"):
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164 self.assert_(hasattr(sys, "getdlopenflags"))
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165 self.assertRaises(TypeError, sys.getdlopenflags, 42)
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166 oldflags = sys.getdlopenflags()
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167 self.assertRaises(TypeError, sys.setdlopenflags)
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168 sys.setdlopenflags(oldflags+1)
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169 self.assertEqual(sys.getdlopenflags(), oldflags+1)
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170 sys.setdlopenflags(oldflags)
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171
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172 def test_refcount(self):
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173 self.assertRaises(TypeError, sys.getrefcount)
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174 c = sys.getrefcount(None)
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175 n = None
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176 self.assertEqual(sys.getrefcount(None), c+1)
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177 del n
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178 self.assertEqual(sys.getrefcount(None), c)
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179 if hasattr(sys, "gettotalrefcount"):
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180 self.assert_(isinstance(sys.gettotalrefcount(), int))
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181
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182 def test_getframe(self):
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183 self.assertRaises(TypeError, sys._getframe, 42, 42)
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184 self.assertRaises(ValueError, sys._getframe, 2000000000)
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185 self.assert_(
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186 SysModuleTest.test_getframe.__code__ \
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187 is sys._getframe().f_code
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188 )
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189
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190 # sys._current_frames() is a CPython-only gimmick.
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191 def test_current_frames(self):
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192 have_threads = True
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193 try:
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194 import _thread
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195 except ImportError:
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196 have_threads = False
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197
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198 if have_threads:
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199 self.current_frames_with_threads()
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200 else:
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201 self.current_frames_without_threads()
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202
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203 # Test sys._current_frames() in a WITH_THREADS build.
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204 def current_frames_with_threads(self):
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205 import threading, _thread
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206 import traceback
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207
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208 # Spawn a thread that blocks at a known place. Then the main
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209 # thread does sys._current_frames(), and verifies that the frames
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210 # returned make sense.
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211 entered_g = threading.Event()
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212 leave_g = threading.Event()
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213 thread_info = [] # the thread's id
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214
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215 def f123():
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216 g456()
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217
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218 def g456():
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219 thread_info.append(_thread.get_ident())
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220 entered_g.set()
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221 leave_g.wait()
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222
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223 t = threading.Thread(target=f123)
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224 t.start()
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225 entered_g.wait()
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226
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227 # At this point, t has finished its entered_g.set(), although it's
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228 # impossible to guess whether it's still on that line or has moved on
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229 # to its leave_g.wait().
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230 self.assertEqual(len(thread_info), 1)
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231 thread_id = thread_info[0]
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232
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233 d = sys._current_frames()
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234
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235 main_id = _thread.get_ident()
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236 self.assert_(main_id in d)
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237 self.assert_(thread_id in d)
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238
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239 # Verify that the captured main-thread frame is _this_ frame.
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240 frame = d.pop(main_id)
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241 self.assert_(frame is sys._getframe())
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242
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243 # Verify that the captured thread frame is blocked in g456, called
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244 # from f123. This is a litte tricky, since various bits of
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245 # threading.py are also in the thread's call stack.
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246 frame = d.pop(thread_id)
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247 stack = traceback.extract_stack(frame)
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248 for i, (filename, lineno, funcname, sourceline) in enumerate(stack):
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249 if funcname == "f123":
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250 break
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251 else:
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252 self.fail("didn't find f123() on thread's call stack")
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253
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254 self.assertEqual(sourceline, "g456()")
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255
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256 # And the next record must be for g456().
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257 filename, lineno, funcname, sourceline = stack[i+1]
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258 self.assertEqual(funcname, "g456")
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259 self.assert_(sourceline in ["leave_g.wait()", "entered_g.set()"])
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260
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261 # Reap the spawned thread.
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262 leave_g.set()
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263 t.join()
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264
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265 # Test sys._current_frames() when thread support doesn't exist.
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266 def current_frames_without_threads(self):
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267 # Not much happens here: there is only one thread, with artificial
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268 # "thread id" 0.
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269 d = sys._current_frames()
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270 self.assertEqual(len(d), 1)
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271 self.assert_(0 in d)
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272 self.assert_(d[0] is sys._getframe())
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273
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274 def test_attributes(self):
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275 self.assert_(isinstance(sys.api_version, int))
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276 self.assert_(isinstance(sys.argv, list))
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277 self.assert_(sys.byteorder in ("little", "big"))
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278 self.assert_(isinstance(sys.builtin_module_names, tuple))
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279 self.assert_(isinstance(sys.copyright, str))
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280 self.assert_(isinstance(sys.exec_prefix, str))
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281 self.assert_(isinstance(sys.executable, str))
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282 self.assertEqual(len(sys.float_info), 11)
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283 self.assertEqual(sys.float_info.radix, 2)
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284 self.assert_(isinstance(sys.hexversion, int))
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285 self.assert_(isinstance(sys.maxsize, int))
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286 self.assert_(isinstance(sys.maxunicode, int))
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287 self.assert_(isinstance(sys.platform, str))
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288 self.assert_(isinstance(sys.prefix, str))
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289 self.assert_(isinstance(sys.version, str))
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290 vi = sys.version_info
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291 self.assert_(isinstance(vi, tuple))
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292 self.assertEqual(len(vi), 5)
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293 self.assert_(isinstance(vi[0], int))
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294 self.assert_(isinstance(vi[1], int))
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295 self.assert_(isinstance(vi[2], int))
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296 self.assert_(vi[3] in ("alpha", "beta", "candidate", "final"))
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297 self.assert_(isinstance(vi[4], int))
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298
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299 def test_43581(self):
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300 # Can't use sys.stdout, as this is a StringIO object when
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301 # the test runs under regrtest.
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302 self.assertEqual(sys.__stdout__.encoding, sys.__stderr__.encoding)
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303
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304 def test_intern(self):
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305 self.assertRaises(TypeError, sys.intern)
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306 s = "never interned before"
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307 self.assert_(sys.intern(s) is s)
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308 s2 = s.swapcase().swapcase()
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309 self.assert_(sys.intern(s2) is s)
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310
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311 # Subclasses of string can't be interned, because they
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312 # provide too much opportunity for insane things to happen.
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313 # We don't want them in the interned dict and if they aren't
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314 # actually interned, we don't want to create the appearance
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315 # that they are by allowing intern() to succeeed.
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316 class S(str):
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317 def __hash__(self):
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318 return 123
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319
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320 self.assertRaises(TypeError, sys.intern, S("abc"))
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321
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322
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323 def test_sys_flags(self):
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324 self.failUnless(sys.flags)
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325 attrs = ("debug", "division_warning",
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326 "inspect", "interactive", "optimize", "dont_write_bytecode",
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327 "no_user_site", "no_site", "ignore_environment", "verbose",
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328 "bytes_warning")
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329 for attr in attrs:
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330 self.assert_(hasattr(sys.flags, attr), attr)
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331 self.assertEqual(type(getattr(sys.flags, attr)), int, attr)
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332 self.assert_(repr(sys.flags))
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333 self.assertEqual(len(sys.flags), len(attrs))
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334
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335 def test_clear_type_cache(self):
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336 sys._clear_type_cache()
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337
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338 def test_compact_freelists(self):
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339 sys._compact_freelists()
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340 r = sys._compact_freelists()
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341 ## freed blocks shouldn't change
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342 #self.assertEqual(r[0][2], 0)
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343 ## fill freelists
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344 #ints = list(range(10000))
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345 #floats = [float(i) for i in ints]
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346 #del ints
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347 #del floats
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348 ## should free more than 100 blocks
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349 #r = sys._compact_freelists()
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350 #self.assert_(r[0][1] > 100, r[0][1])
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351 #self.assert_(r[0][2] > 100, r[0][2])
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352
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353 def test_ioencoding(self):
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354 import subprocess,os
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355 env = dict(os.environ)
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356
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357 # Test character: cent sign, encoded as 0x4A (ASCII J) in CP424,
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358 # not representable in ASCII.
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359
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360 env["PYTHONIOENCODING"] = "cp424"
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361 p = subprocess.Popen([sys.executable, "-c", 'print(chr(0xa2))'],
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362 stdout = subprocess.PIPE, env=env)
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363 out = p.stdout.read()
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364 self.assertEqual(out, "\xa2\n".encode("cp424"))
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365
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366 env["PYTHONIOENCODING"] = "ascii:replace"
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367 p = subprocess.Popen([sys.executable, "-c", 'print(chr(0xa2))'],
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368 stdout = subprocess.PIPE, env=env)
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369 out = p.stdout.read().strip()
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370 self.assertEqual(out, b'?')
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371
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372
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373 class SizeofTest(unittest.TestCase):
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374
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375 def setUp(self):
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376 import struct
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377 self.i = len(struct.pack('i', 0))
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378 self.l = len(struct.pack('l', 0))
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379 self.p = len(struct.pack('P', 0))
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380 self.headersize = self.l + self.p
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381 if hasattr(sys, "gettotalrefcount"):
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382 self.headersize += 2 * self.p
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383 self.file = open(test.support.TESTFN, 'wb')
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384
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385 def tearDown(self):
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386 self.file.close()
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387 test.support.unlink(test.support.TESTFN)
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388
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389 def check_sizeof(self, o, size, size2=None):
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390 """Check size of o. Possible are size and optionally size2)."""
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391 result = sys.getsizeof(o)
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392 msg = 'wrong size for %s: got %d, expected ' % (type(o), result)
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393 if (size2 != None) and (result != size):
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394 self.assertEqual(result, size2, msg + str(size2))
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395 else:
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396 self.assertEqual(result, size, msg + str(size))
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397
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398 def align(self, value):
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399 mod = value % self.p
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400 if mod != 0:
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401 return value - mod + self.p
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402 else:
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403 return value
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404
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405 def test_align(self):
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406 self.assertEqual(self.align(0) % self.p, 0)
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407 self.assertEqual(self.align(1) % self.p, 0)
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408 self.assertEqual(self.align(3) % self.p, 0)
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409 self.assertEqual(self.align(4) % self.p, 0)
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410 self.assertEqual(self.align(7) % self.p, 0)
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411 self.assertEqual(self.align(8) % self.p, 0)
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412 self.assertEqual(self.align(9) % self.p, 0)
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413
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414 def test_standardtypes(self):
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415 i = self.i
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416 l = self.l
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417 p = self.p
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418 h = self.headersize
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419 # bool
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420 self.check_sizeof(True, h + 2*l)
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421 # bytearray
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422 self.check_sizeof(bytes(), h + self.align(i) + l + p)
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423 # cell
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424 def get_cell():
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425 x = 42
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426 def inner():
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427 return x
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428 return inner
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429 self.check_sizeof(get_cell().__closure__[0], h + p)
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430 # code
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431 self.check_sizeof(get_cell().__code__, h + self.align(5*i) + 8*p +\
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432 self.align(i) + 2*p)
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433 # complex
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434 self.check_sizeof(complex(0,1), h + 2*8)
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435 # enumerate
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436 self.check_sizeof(enumerate([]), h + l + 3*p)
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437 # reverse
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438 self.check_sizeof(reversed(''), h + l + p )
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439 # float
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440 self.check_sizeof(float(0), h + 8)
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441 # function
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442 def func(): pass
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443 self.check_sizeof(func, h + 11 * p)
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444 class c():
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445 @staticmethod
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446 def foo():
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447 pass
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448 @classmethod
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449 def bar(cls):
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450 pass
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451 # staticmethod
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452 self.check_sizeof(foo, h + l)
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453 # classmethod
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454 self.check_sizeof(bar, h + l)
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455 # generator
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456 def get_gen(): yield 1
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457 self.check_sizeof(get_gen(), h + p + self.align(i) + 2*p)
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458 # builtin_function_or_method
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459 self.check_sizeof(abs, h + 3*p)
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460 # module
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461 self.check_sizeof(unittest, h + 3*p)
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462 # range
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463 self.check_sizeof(range(1), h + 3*p)
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464 # slice
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465 self.check_sizeof(slice(0), h + 3*p)
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466
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467 h += l
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468 # new-style class
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469 class class_newstyle(object):
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470 def method():
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471 pass
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472 # type (PyTypeObject + PyNumberMethods + PyMappingMethods +
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473 # PySequenceMethods + PyBufferProcs)
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474 self.check_sizeof(class_newstyle, h +
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475 # PyTypeObject
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476 p + 2*l + 15*p + l + 4*p + l + 9*p + l + 11*p +
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477 self.align(4) +
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478 # PyNumberMethods
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479 16*p + self.align(i) + 17*p +
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480 3*p + # PyMappingMethods
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481 10*p + # PySequenceMethods
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482 2*p + # PyBufferProcs
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483 2*p) # *ht_name and *ht_slots
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484
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485 def test_specialtypes(self):
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486 i = self.i
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487 l = self.l
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488 p = self.p
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489 h = self.headersize
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490 # dict
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491 self.check_sizeof({}, h + 3*l + 3*p + 8*(l + 2*p))
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492 longdict = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8}
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493 self.check_sizeof(longdict, h + 3*l + 3*p + 8*(l + 2*p) + 16*(l + 2*p))
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494 # list
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495 self.check_sizeof([], h + l + p + l)
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496 self.check_sizeof([1, 2, 3], h + l + p + l + 3*l)
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497 # unicode
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498 import math
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499 usize = math.log(sys.maxunicode + 1, 2) / 8
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500 samples = ['', '1'*100]
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501 # we need to test for both sizes, because we don't know if the string
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502 # has been cached
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503 for s in samples:
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504 basicsize = h + l + p + l + l + p + usize * (len(s) + 1)
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505 defenc = bytes(s, 'ascii')
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506 self.check_sizeof(s, basicsize,
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507 size2=basicsize + sys.getsizeof(defenc))
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508 # trigger caching encoded version as bytes object
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509 try:
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510 getattr(sys, s)
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511 except AttributeError:
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512 pass
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513 finally:
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514 self.check_sizeof(s, basicsize + sys.getsizeof(defenc))
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515
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516 h += l
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517 # long
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518 self.check_sizeof(0, h + self.align(2))
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519 self.check_sizeof(1, h + self.align(2))
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520 self.check_sizeof(-1, h + self.align(2))
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521 self.check_sizeof(32768, h + self.align(2) + 2)
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522 self.check_sizeof(32768*32768-1, h + self.align(2) + 2)
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523 self.check_sizeof(32768*32768, h + self.align(2) + 4)
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524
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525
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526 def test_main():
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527 test.support.run_unittest(SysModuleTest, SizeofTest)
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528
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529 if __name__ == "__main__":
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530 test_main()