Issue #14455: fix handling of unsigned long long values for binary plist files

Values in the range of an unsigned long long, but outside of the range
of a signed long long were serialized as a negative value.

Due to a bug in PyObjC my test scripts indicated that the previous behavior
matched Apple's plist code, instead the handle large unsigned values correctly.

The change to plistlib.py is from a patch by Serhiy.

1 files changed, 67 insertions, 65 deletions

diff --git a/Lib/test/test_plistlib.py b/Lib/test/test_plistlib.py
index a191608..bb7cc15 100644
--- a/Lib/test/test_plistlib.py
+++ b/Lib/test/test_plistlib.py
@@ -22,72 +22,73 @@ TESTDATA={
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 }
 
 
@@ -106,6 +107,7 @@ class TestPlistlib(unittest.TestCase):
             aFloat = 0.5,
             anInt = 728,
             aBigInt = 2 ** 63 - 44,
+            aBigInt2 = 2 ** 63 + 44,
             aNegativeInt = -5,
             aNegativeBigInt = -80000000000,
             aDict=dict(
@@ -152,7 +154,7 @@ class TestPlistlib(unittest.TestCase):
 
     def test_int(self):
         for pl in [0, 2**8-1, 2**8, 2**16-1, 2**16, 2**32-1, 2**32,
-                   2**63-1, 1, -2**63]:
+                   2**63-1, 2**64-1, 1, -2**63]:
             for fmt in ALL_FORMATS:
                 with self.subTest(pl=pl, fmt=fmt):
                     data = plistlib.dumps(pl, fmt=fmt)