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test.support: add requires_mac_ver() function

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Add also linux_version() to __all__.
This commit is contained in:
Victor Stinner 2011-06-01 12:28:04 +02:00
parent 197a59f49b
commit fce9233e93
2 changed files with 25 additions and 4 deletions
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7
Lib/test/test_math.py
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@ -2,6 +2,7 @@
# XXXX Should not do tests around zero only
from test.support import run_unittest, verbose, requires_IEEE_754
from test import support
import unittest
import math
import os
@ -669,10 +670,10 @@ class MathTests(unittest.TestCase):
self.assertTrue(math.isnan(math.log2(NAN)))
@requires_IEEE_754
@unittest.skipIf(sys.platform == 'darwin'
and platform.mac_ver()[0].startswith('10.4.'),
'Mac OS X Tiger log2() is not accurate enough')
def testLog2Exact(self):
# log2() is not accurate enough on Mac OS X Tiger (10.4)
support.requires_mac_ver(10, 5)
# Check that we get exact equality for log2 of powers of 2.
actual = [math.log2(math.ldexp(1.0, n)) for n in range(-1074, 1024)]
expected = [float(n) for n in range(-1074, 1024)]