bpo-13153: Use OS native encoding for converting between Python and Tcl. (GH-16545)

On Windows use UTF-16 (or UTF-32 for 32-bit Tcl_UniChar) with the
"surrogatepass" error handler for converting to/from Tcl Unicode objects.

On Linux use UTF-8 with the "surrogateescape" error handler for converting
to/from Tcl String objects.

Converting strings from Tcl to Python and back now never fails
(except MemoryError).
(cherry picked from commit 06cb94bc8419b9a24df6b0d724fcd8e40c6971d6)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

1 files changed, 0 insertions, 12 deletions

diff --git a/Lib/idlelib/idle_test/test_editor.py b/Lib/idlelib/idle_test/test_editor.py
index 4af4ff0..240db71 100644
--- a/Lib/idlelib/idle_test/test_editor.py
+++ b/Lib/idlelib/idle_test/test_editor.py
@@ -30,18 +30,6 @@ class EditorWindowTest(unittest.TestCase):
         e._close()
 
 
-class EditorFunctionTest(unittest.TestCase):
-
-    def test_filename_to_unicode(self):
-        func = Editor._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)
-
-
 class TestGetLineIndent(unittest.TestCase):
     def test_empty_lines(self):
         for tabwidth in [1, 2, 4, 6, 8]: