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-rw-r--r--Lib/test/test_unicode.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index c2ede07a83..e1ccd5c1da 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -661,6 +661,11 @@ class UnicodeTest(string_tests.CommonTest,
self.assertEqual('x'.center(4, '\U0010FFFF'),
'\U0010FFFFx\U0010FFFF\U0010FFFF')
+ @unittest.skipUnless(sys.maxsize == 2**31 - 1, "requires 32-bit system")
+ def test_case_operation_overflow(self):
+ # Issue #22643
+ self.assertRaises(OverflowError, ("ΓΌ"*(2**32//12 + 1)).upper)
+
def test_contains(self):
# Testing Unicode contains method
self.assertIn('a', 'abdb')