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[3.13] gh-121039: add Floats/ComplexesAreIdenticalMixin to test.support.testcase (GH-121071) (#123840)

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* [3.13] gh-121039: add Floats/ComplexesAreIdenticalMixin to test.support.testcase (GH-121071)
(cherry picked from commit 8ef8354ef1)

Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>

* +1
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Sergey B Kirpichev 2024-09-30 04:27:23 +03:00 • committed by GitHub
parent 25a23cb002
commit 62e54ddc05
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5 changed files with 63 additions and 87 deletions
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Lib/test/test_float.py
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@ -8,6 +8,7 @@ import time
import unittest
from test import support
from test.support.testcase import FloatsAreIdenticalMixin
from test.test_grammar import (VALID_UNDERSCORE_LITERALS,
INVALID_UNDERSCORE_LITERALS)
from math import isinf, isnan, copysign, ldexp
@ -1053,21 +1054,14 @@ class InfNanTest(unittest.TestCase):
fromHex = float.fromhex
toHex = float.hex
class HexFloatTestCase(unittest.TestCase):
class HexFloatTestCase(FloatsAreIdenticalMixin, unittest.TestCase):
MAX = fromHex('0x.fffffffffffff8p+1024') # max normal
MIN = fromHex('0x1p-1022') # min normal
TINY = fromHex('0x0.0000000000001p-1022') # min subnormal
EPS = fromHex('0x0.0000000000001p0') # diff between 1.0 and next float up
def identical(self, x, y):
# check that floats x and y are identical, or that both
# are NaNs
if isnan(x) or isnan(y):
if isnan(x) == isnan(y):
return
elif x == y and (x != 0.0 or copysign(1.0, x) == copysign(1.0, y)):
return
self.fail('%r not identical to %r' % (x, y))
self.assertFloatsAreIdentical(x, y)
def test_ends(self):
self.identical(self.MIN, ldexp(1.0, -1022))