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

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Sergey B Kirpichev 2024-09-11 12:21:05 +03:00 committed by GitHub
parent a1dbf2ea69
commit d2b9b6f919
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1 changed files with 5 additions and 5 deletions
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Lib/test/test_float.py
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@ -863,7 +863,7 @@ class ReprTestCase(unittest.TestCase):
self.assertEqual(repr(float(negs)), str(float(negs))) self.assertEqual(repr(float(negs)), str(float(negs)))
@support.requires_IEEE_754 @support.requires_IEEE_754
class RoundTestCase(unittest.TestCase): class RoundTestCase(unittest.TestCase, FloatsAreIdenticalMixin):
def test_inf_nan(self): def test_inf_nan(self):
self.assertRaises(OverflowError, round, INF) self.assertRaises(OverflowError, round, INF)
@ -893,10 +893,10 @@ class RoundTestCase(unittest.TestCase):
def test_small_n(self): def test_small_n(self):
for n in [-308, -309, -400, 1-2**31, -2**31, -2**31-1, -2**100]: 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.assertFloatsAreIdentical(round(123.456, n), 0.0)
self.assertEqual(round(-123.456, n), -0.0) self.assertFloatsAreIdentical(round(-123.456, n), -0.0)
self.assertEqual(round(1e300, n), 0.0) self.assertFloatsAreIdentical(round(1e300, n), 0.0)
self.assertEqual(round(1e-320, n), 0.0) self.assertFloatsAreIdentical(round(1e-320, n), 0.0)
def test_overflow(self): def test_overflow(self):
self.assertRaises(OverflowError, round, 1.6e308, -308) self.assertRaises(OverflowError, round, 1.6e308, -308)