[Python-checkins] CVS: python/dist/src/Lib/test pickletester.py,1.4,1.5

[Tim Peters]

Update of /cvsroot/python/python/dist/src/Lib/test
In directory usw-pr-cvs1:/tmp/cvs-serv21796/python/dist/src/Lib/test

Modified Files:
	pickletester.py 
Log Message:
Test full range of native ints.  This exposes two more binary pickle
bugs on sizeof(long)==8 machines.  pickle.py has no idea what it's
doing with very large ints, and variously gets things right by accident,
computes nonsense, or generates corrupt pickles.  cPickle fails on
cases 2**31 <= i < 2**32:  since it *thinks* those are 4-byte ints
(the "high 4 bytes" are all zeroes), it stores them in the (signed!) BININT
format, so they get unpickled as negative values.


Index: pickletester.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/pickletester.py,v
retrieving revision 1.4
retrieving revision 1.5
diff -C2 -r1.4 -r1.5
*** pickletester.py	2001/04/09 20:07:05	1.4
--- pickletester.py	2001/04/10 03:41:41	1.5
***************
*** 1,4 ****
--- 1,7 ----
  # test_pickle and test_cpickle both use this.
  
+ from test_support import TestFailed
+ import sys
+ 
  # break into multiple strings to please font-lock-mode
  DATA = """(lp1
***************
*** 198,199 ****
--- 201,218 ----
              if u2 != u:
                  print "Endcase failure: %s => %s" % (`u`, `u2`)
+ 
+     # Test the full range of Python ints.
+     n = sys.maxint
+     while n:
+         for expected in (-n, n):
+             for binary_mode in (0, 1):
+                 s = pickle.dumps(expected, binary_mode)
+                 got = pickle.loads(s)
+                 if expected != got:
+                     raise TestFailed("for %s-mode pickle of %d, pickle "
+                                      "string is %s, loaded back as %s" % (
+                                      binary_mode and "binary" or "text",
+                                      expected,
+                                      repr(s),
+                                      got))
+         n = n >> 1