From 6e61ceaa1b5f132c67ddc86dd0fa0085969152d5 Mon Sep 17 00:00:00 2001 From: Guido van Rossum Date: Sat, 5 Jan 2008 00:59:59 +0000 Subject: Patch #1725 by Mark Dickinson, fixes incorrect conversion of -1e1000 and adds errors for -0x. --- Lib/test/test_float.py | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'Lib/test/test_float.py') diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py index 11f169054a..9d330403aa 100644 --- a/Lib/test/test_float.py +++ b/Lib/test/test_float.py @@ -121,6 +121,13 @@ class IEEEFormatTestCase(unittest.TestCase): self.assertEquals(pos_pos(), neg_pos()) self.assertEquals(pos_neg(), neg_neg()) + if float.__getformat__("double").startswith("IEEE"): + def test_underflow_sign(self): + import math + # check that -1e-1000 gives -0.0, not 0.0 + self.assertEquals(math.atan2(-1e-1000, -1), math.atan2(-0.0, -1)) + self.assertEquals(math.atan2(float('-1e-1000'), -1), + math.atan2(-0.0, -1)) class ReprTestCase(unittest.TestCase): def test_repr(self): -- cgit v1.2.1