import unittest from tkinter import Tk, Text from idlelib.EditorWindow import EditorWindow from test.support import requires class Editor_func_test(unittest.TestCase): def test_filename_to_unicode(self): func = EditorWindow._filename_to_unicode class dummy(): filesystemencoding = 'utf-8' pairs = (('abc', 'abc'), ('a\U00011111c', 'a\ufffdc'), (b'abc', 'abc'), (b'a\xf0\x91\x84\x91c', 'a\ufffdc')) for inp, out in pairs: self.assertEqual(func(dummy, inp), out) if __name__ == '__main__': unittest.main(verbosity=2)