From df77e3d4a07223ebfe049e66d4d8a8c0b4315e04 Mon Sep 17 00:00:00 2001 From: Mark Dickinson Date: Mon, 9 May 2011 14:02:45 +0100 Subject: Issue #11188: In log2 tests, create powers of 2 using ldexp(1, n) instead of the less reliable 2.0**n. --- Lib/test/test_math.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py index 3b80bb6..81080f2 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 -- cgit v0.12