[pypy-commit] pypy default: since pack() uses copysign, avoid testing copysign(1.0, float('nan')) which is platform dependent

[mattip]

Author: mattip <matti.picus at gmail.com>
Branch: 
Changeset: r72069:e01f896e6bfc
Date: 2014-06-15 20:38 +0300
http://bitbucket.org/pypy/pypy/changeset/e01f896e6bfc/

Log:	since pack() uses copysign, avoid testing copysign(1.0,
	float('nan')) which is platform dependent

diff --git a/rpython/rlib/rstruct/test/test_ieee.py b/rpython/rlib/rstruct/test/test_ieee.py
--- a/rpython/rlib/rstruct/test/test_ieee.py
+++ b/rpython/rlib/rstruct/test/test_ieee.py
@@ -198,8 +198,9 @@
 
         def check_roundtrip(x, size):
             s = c_pack(x, size)
-            assert s == pack(x, size)
             if not isnan(x):
+                # pack uses copysign which is ambiguous for NAN
+                assert s == pack(x, size)
                 assert unpack(s) == x
                 assert c_unpack(s) == x
             else: