mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 00:48:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

Issue #11188: In log2 tests, create powers of 2 using ldexp(1, n) instead of the less reliable 2.0**n.

Browse source
This commit is contained in:
Mark Dickinson 2011-05-09 14:02:45 +01:00
parent 86e104a6ab
commit df77e3d4a0
1 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
Lib/test/test_math.py
View file

@ -653,8 +653,8 @@ class MathTests(unittest.TestCase):
def testLog2(self):
self.assertRaises(TypeError, math.log2)
# Check that we get exact equality for log2 of powers of 2.
actual = [math.log2(2.0**n) for n in range(-324, 1024)]
expected = [float(n) for n in range(-324, 1024)]
actual = [math.log2(math.ldexp(1.0, n)) for n in range(-1074, 1024)]
expected = [float(n) for n in range(-1074, 1024)]
self.assertEqual(actual, expected)
# Check some integer values