From: Mark Dickinson Date: Mon, 9 May 2011 13:02:45 +0000 (+0100) Subject: Issue #11188: In log2 tests, create powers of 2 using ldexp(1, n) instead of the... X-Git-Tag: v3.3.0a1~2338 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=df77e3d4a07223ebfe049e66d4d8a8c0b4315e04;p=python Issue #11188: In log2 tests, create powers of 2 using ldexp(1, n) instead of the less reliable 2.0**n. --- diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py index 3b80bb6c6f..81080f2d1f 100644 --- a/Lib/test/test_math.py +++ b/Lib/test/test_math.py @@ -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