1 files changed, 14 insertions, 1 deletions
diff --git a/Lib/test/test_unicodedata.py b/Lib/test/test_unicodedata.py
index 2dfa807..4f691b5 100644
--- a/Lib/test/test_unicodedata.py
+++ b/Lib/test/test_unicodedata.py
@@ -20,7 +20,7 @@ encoding = 'utf-8'
 class UnicodeMethodsTest(unittest.TestCase):
 
     # update this, if the database changes
-    expectedchecksum = 'aef99984a58c8e1e5363a3175f2ff9608599a93e'
+    expectedchecksum = 'b7db9b5f1d804976fa921d2009cbef6f025620c1'
 
     def test_method_checksum(self):
         h = hashlib.sha1()
@@ -258,6 +258,19 @@ class UnicodeMiscTest(UnicodeDatabaseTest):
         # the upper-case mapping: as delta, or as absolute value
         self.assert_("a".upper()=='A')
         self.assert_("\u1d79".upper()=='\ua77d')
+        self.assert_(".".upper()=='.')
+
+    def test_bug_5828(self):
+        self.assertEqual("\u1d79".lower(), "\u1d79")
+        # Only U+0000 should have U+0000 as its upper/lower/titlecase variant
+        self.assertEqual(
+            [
+                c for c in range(sys.maxunicode+1)
+                if "\x00" in chr(c).lower()+chr(c).upper()+chr(c).title()
+            ],
+            [0]
+        )
+
 
 def test_main():
     test.support.run_unittest(