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