mirror of https://github.com/python/cpython
47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
import os
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import sys
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import unittest
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import test.support as test_support
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from test.support import os_helper
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from tkinter import Tcl, TclError
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test_support.requires('gui')
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class TkLoadTest(unittest.TestCase):
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@unittest.skipIf('DISPLAY' not in os.environ, 'No $DISPLAY set.')
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def testLoadTk(self):
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tcl = Tcl()
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self.assertRaises(TclError,tcl.winfo_geometry)
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tcl.loadtk()
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self.assertEqual('1x1+0+0', tcl.winfo_geometry())
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tcl.destroy()
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def testLoadTkFailure(self):
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old_display = None
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if sys.platform.startswith(('win', 'darwin', 'cygwin')):
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# no failure possible on windows?
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# XXX Maybe on tk older than 8.4.13 it would be possible,
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# see tkinter.h.
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return
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with os_helper.EnvironmentVarGuard() as env:
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if 'DISPLAY' in os.environ:
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del env['DISPLAY']
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# on some platforms, deleting environment variables
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# doesn't actually carry through to the process level
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# because they don't support unsetenv
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# If that's the case, abort.
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with os.popen('echo $DISPLAY') as pipe:
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display = pipe.read().strip()
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if display:
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return
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tcl = Tcl()
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self.assertRaises(TclError, tcl.winfo_geometry)
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self.assertRaises(TclError, tcl.loadtk)
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if __name__ == "__main__":
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unittest.main()
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