commit 62764566e8892233d0408368d6760bd710b1c504
author Mark Dickinson <dickinsm@gmail.com> Tue Jul 15 21:55:23 2008 +0000
committer Mark Dickinson <dickinsm@gmail.com> Tue Jul 15 21:55:23 2008 +0000
tree fd65e39c3cbee3ae90c4af8fa4787a26efb6f72a
parent 2affb40e70808c3613708ab2e360b5070e1583f7

Fix float.from_hex tests.  It appears that Linux/ia64 doesn't like
computing 2.0**-1074 accurately.  Using ldexp(1.0, -1074) should be
safer.

Lib/test/test_float.py

diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py
index 254dd37..3f4998d 100644
--- a/Lib/test/test_float.py
+++ b/Lib/test/test_float.py
@@ -362,10 +362,10 @@
         self.fail('%r not identical to %r' % (x, y))
 
     def test_ends(self):
-        self.identical(self.MIN, 2.**-1022)
-        self.identical(self.TINY, 2.**-1074)
-        self.identical(self.EPS, 2.**-52)
-        self.identical(self.MAX, 2.*(2.**1023 - 2.**970))
+        self.identical(self.MIN, ldexp(1.0, -1022))
+        self.identical(self.TINY, ldexp(1.0, -1074))
+        self.identical(self.EPS, ldexp(1.0, -52))
+        self.identical(self.MAX, 2.*(ldexp(1.0, 1023) - ldexp(1.0, 970)))
 
     def test_invalid_inputs(self):
         invalid_inputs = [