commit a9a8a9814a52b3c92b3680f0b3a356116510ee18
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Mon Feb 26 16:50:09 2018 -0800
committer GitHub <noreply@github.com> Mon Feb 26 16:50:09 2018 -0800
tree cb6e1f0bee39923db9d354e741f330c36dbe2995
parent 51d95ffc2fb3337dc87277c9af25ecc9a01f991b

bpo-32713: Fix tarfile.itn for large/negative float values. (GH-5434)

(cherry picked from commit 72d9b2be36f091793ae7ffc5ad751f040c6e6ad3)

Co-authored-by: Joffrey F <f.joffrey@gmail.com>

Lib/test/test_tarfile.py

diff --git a/Lib/test/test_tarfile.py b/Lib/test/test_tarfile.py
index b868326..7d2eec8 100644
--- a/Lib/test/test_tarfile.py
+++ b/Lib/test/test_tarfile.py
@@ -2149,6 +2149,14 @@
         self.assertEqual(tarfile.itn(-0x100000000000000),
                          b"\xff\x00\x00\x00\x00\x00\x00\x00")
 
+        # Issue 32713: Test if itn() supports float values outside the
+        # non-GNU format range
+        self.assertEqual(tarfile.itn(-100.0, format=tarfile.GNU_FORMAT),
+                         b"\xff\xff\xff\xff\xff\xff\xff\x9c")
+        self.assertEqual(tarfile.itn(8 ** 12 + 0.0, format=tarfile.GNU_FORMAT),
+                         b"\x80\x00\x00\x10\x00\x00\x00\x00")
+        self.assertEqual(tarfile.nti(tarfile.itn(-0.1, format=tarfile.GNU_FORMAT)), 0)
+
     def test_number_field_limits(self):
         with self.assertRaises(ValueError):
             tarfile.itn(-1, 8, tarfile.USTAR_FORMAT)