bpo-29456: Fix bugs in unicodedata.normalize: u1176, u11a7 and u11c3 (GH-1958)

Hangul composition check boundaries are wrong for the second character
([0x1161, 0x1176) instead of [0x1161, 0x1176]) and third character ((0x11A7, 0x11C3)
instead of [0x11A7, 0x11C3]).

1 files changed, 13 insertions, 0 deletions

diff --git a/Lib/test/test_unicodedata.py b/Lib/test/test_unicodedata.py
index 99dd0dec9d..170778fa97 100644
--- a/Lib/test/test_unicodedata.py
+++ b/Lib/test/test_unicodedata.py
@@ -208,6 +208,19 @@ class UnicodeFunctionsTest(UnicodeDatabaseTest):
         b = 'C\u0338' * 20  + '\xC7'
         self.assertEqual(self.db.normalize('NFC', a), b)
 
+    def test_issue29456(self):
+        # Fix #29456
+        u1176_str_a = '\u1100\u1176\u11a8'
+        u1176_str_b = '\u1100\u1176\u11a8'
+        u11a7_str_a = '\u1100\u1175\u11a7'
+        u11a7_str_b = '\uae30\u11a7'
+        u11c3_str_a = '\u1100\u1175\u11c3'
+        u11c3_str_b = '\uae30\u11c3'
+        self.assertEqual(self.db.normalize('NFC', u1176_str_a), u1176_str_b)
+        self.assertEqual(self.db.normalize('NFC', u11a7_str_a), u11a7_str_b)
+        self.assertEqual(self.db.normalize('NFC', u11c3_str_a), u11c3_str_b)
+
+
     def test_east_asian_width(self):
         eaw = self.db.east_asian_width
         self.assertRaises(TypeError, eaw, b'a')