[Python-checkins] r64981 - python/trunk/Lib/test/test_float.py

[mark.dickinson]

Author: mark.dickinson
Date: Tue Jul 15 23:55:23 2008
New Revision: 64981

Log:
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.


Modified:
   python/trunk/Lib/test/test_float.py

Modified: python/trunk/Lib/test/test_float.py
==============================================================================
--- python/trunk/Lib/test/test_float.py	(original)
+++ python/trunk/Lib/test/test_float.py	Tue Jul 15 23:55:23 2008
@@ -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 = [