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, 22 insertions, 0 deletions

diff --git a/Lib/tkinter/test/test_tkinter/test_misc.py b/Lib/tkinter/test/test_tkinter/test_misc.py
index 1d1a3c2..236cae0 100644
--- a/Lib/tkinter/test/test_tkinter/test_misc.py
+++ b/Lib/tkinter/test/test_tkinter/test_misc.py
@@ -156,6 +156,28 @@ class MiscTest(AbstractTkTest, unittest.TestCase):
         with self.assertRaises(tkinter.TclError):
             root.tk.call('after', 'info', idle1)
 
+    def test_clipboard(self):
+        root = self.root
+        root.clipboard_clear()
+        root.clipboard_append('Ùñî')
+        self.assertEqual(root.clipboard_get(), 'Ùñî')
+        root.clipboard_append('çōđě')
+        self.assertEqual(root.clipboard_get(), 'Ùñîçōđě')
+        root.clipboard_clear()
+        with self.assertRaises(tkinter.TclError):
+            root.clipboard_get()
+
+    def test_clipboard_astral(self):
+        root = self.root
+        root.clipboard_clear()
+        root.clipboard_append('𝔘𝔫𝔦')
+        self.assertEqual(root.clipboard_get(), '𝔘𝔫𝔦')
+        root.clipboard_append('𝔠𝔬𝔡𝔢')
+        self.assertEqual(root.clipboard_get(), '𝔘𝔫𝔦𝔠𝔬𝔡𝔢')
+        root.clipboard_clear()
+        with self.assertRaises(tkinter.TclError):
+            root.clipboard_get()
+
 
 tests_gui = (MiscTest, )