From: Sergey B Kirpichev <skirpichev@gmail.com>
Date: Wed, 11 Sep 2024 09:21:05 +0000 (+0300)
Subject: gh-123811: test that round() can return signed zero (#123829)
X-Git-Tag: v3.14.0a1~525
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d2b9b6f919e92184420c8e13d078e83447ce7917;p=thirdparty%2FPython%2Fcpython.git

gh-123811: test that round() can return signed zero (#123829)
---

diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py
index 42fc99131472..048bb1450906 100644
--- a/Lib/test/test_float.py
+++ b/Lib/test/test_float.py
@@ -863,7 +863,7 @@ class ReprTestCase(unittest.TestCase):
             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)
@@ -893,10 +893,10 @@ class RoundTestCase(unittest.TestCase):
 
     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)