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-rw-r--r--Lib/test/test_zlib.py8
1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py
index 13656d6..6b7d4a6 100644
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -38,6 +38,14 @@ class ChecksumTestCase(unittest.TestCase):
self.assertEqual(zlib.crc32(b"penguin"), zlib.crc32(b"penguin", 0))
self.assertEqual(zlib.adler32(b"penguin"),zlib.adler32(b"penguin",1))
+ def test_crc32_adler32_unsigned(self):
+ foo = 'abcdefghijklmnop'
+ # explicitly test signed behavior
+ self.assertEqual(zlib.crc32(foo), 2486878355)
+ self.assertEqual(zlib.crc32('spam'), 1138425661)
+ self.assertEqual(zlib.adler32(foo+foo), 3573550353)
+ self.assertEqual(zlib.adler32('spam'), 72286642)
+
class ExceptionTestCase(unittest.TestCase):