https://github.com/python/cpython/commit/243db20b75e6c127bb8bd2d42099ba16a5fc56e1
commit: 243db20b75e6c127bb8bd2d42099ba16a5fc56e1
branch: 3.13
author: Miss Islington (bot) <[email protected]>
committer: Yhg1s <[email protected]>
date: 2024-09-29T21:22:13-07:00
summary:

[3.13] gh-123811: test that round() can return signed zero (GH-123829) (#123938)

gh-123811: test that round() can return signed zero (GH-123829)
(cherry picked from commit d2b9b6f919e92184420c8e13d078e83447ce7917)

Co-authored-by: Sergey B Kirpichev <[email protected]>

files:
M Lib/test/test_float.py

diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py
index ebe026eb910e7e..65b9cb03e616d7 100644
--- a/Lib/test/test_float.py
+++ b/Lib/test/test_float.py
@@ -830,7 +830,7 @@ def test_short_repr(self):
             self.assertEqual(repr(float(negs)), str(float(negs)))
 
 @support.requires_IEEE_754
-class RoundTestCase(unittest.TestCase):
+class RoundTestCase(unittest.TestCase, FloatsAreIdenticalMixin):
 
     def test_inf_nan(self):
         self.assertRaises(OverflowError, round, INF)
@@ -860,10 +860,10 @@ def test_large_n(self):
 
     def test_small_n(self):
         for n in [-308, -309, -400, 1-2**31, -2**31, -2**31-1, -2**100]:
-            self.assertEqual(round(123.456, n), 0.0)
-            self.assertEqual(round(-123.456, n), -0.0)
-            self.assertEqual(round(1e300, n), 0.0)
-            self.assertEqual(round(1e-320, n), 0.0)
+            self.assertFloatsAreIdentical(round(123.456, n), 0.0)
+            self.assertFloatsAreIdentical(round(-123.456, n), -0.0)
+            self.assertFloatsAreIdentical(round(1e300, n), 0.0)
+            self.assertFloatsAreIdentical(round(1e-320, n), 0.0)
 
     def test_overflow(self):
         self.assertRaises(OverflowError, round, 1.6e308, -308)

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