Mercurial > cpython-lru_cache-weakref

annotate Lib/tkinter/test/test_tkinter/test_loadtk.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 ba16ff86d4f6
children
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1 import os
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2 import sys
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3 import unittest
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4 import test.support as test_support
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5 from tkinter import Tcl, TclError
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6
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7 test_support.requires('gui')
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8
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9 class TkLoadTest(unittest.TestCase):
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11 @unittest.skipIf('DISPLAY' not in os.environ, 'No $DISPLAY set.')
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12 def testLoadTk(self):
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13 tcl = Tcl()
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14 self.assertRaises(TclError,tcl.winfo_geometry)
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15 tcl.loadtk()
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16 self.assertEqual('1x1+0+0', tcl.winfo_geometry())
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17 tcl.destroy()
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18
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19 def testLoadTkFailure(self):
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20 old_display = None
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21 if sys.platform.startswith(('win', 'darwin', 'cygwin')):
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22 # no failure possible on windows?
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23
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24 # XXX Maybe on tk older than 8.4.13 it would be possible,
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25 # see tkinter.h.
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26 return
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27 with test_support.EnvironmentVarGuard() as env:
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28 if 'DISPLAY' in os.environ:
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29 del env['DISPLAY']
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30 # on some platforms, deleting environment variables
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31 # doesn't actually carry through to the process level
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32 # because they don't support unsetenv
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33 # If that's the case, abort.
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34 with os.popen('echo $DISPLAY') as pipe:
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35 display = pipe.read().strip()
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36 if display:
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37 return
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38
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39 tcl = Tcl()
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40 self.assertRaises(TclError, tcl.winfo_geometry)
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41 self.assertRaises(TclError, tcl.loadtk)
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42
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43 tests_gui = (TkLoadTest, )
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44
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45 if __name__ == "__main__":
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46 test_support.run_unittest(*tests_gui)