Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / v9 / lib / python2.4 / test / test_operations.py

# Python test set -- part 3, built-in operations.


print '3. Operations'
print 'XXX Mostly not yet implemented'


print '3.1 Dictionary lookups succeed even if __cmp__() raises an exception'

# SourceForge bug #112558:
# http://sourceforge.net/bugs/?func=detailbug&bug_id=112558&group_id=5470

class BadDictKey:
   already_printed_raising_error = 0

   def __hash__(self):
       return hash(self.__class__)

   def __cmp__(self, other):
       if isinstance(other, self.__class__):
           if not BadDictKey.already_printed_raising_error:
               # How many times __cmp__ gets called depends on the hash
               # code and the internals of the dict implementation; we
               # know it will be called at least once, but that's it.
               # already_printed_raising_error makes sure the expected-
               # output file prints the msg at most once.
               BadDictKey.already_printed_raising_error = 1
               print "raising error"
           raise RuntimeError, "gotcha"
       return other

d = {}
x1 = BadDictKey()
x2 = BadDictKey()
d[x1] = 1
d[x2] = 2
print "No exception passed through."

# Dict resizing bug, found by Jack Jansen in 2.2 CVS development.
# This version got an assert failure in debug build, infinite loop in
# release build.  Unfortunately, provoking this kind of stuff requires
# a mix of inserts and deletes hitting exactly the right hash codes in
# exactly the right order, and I can't think of a randomized approach
# that would be *likely* to hit a failing case in reasonable time.

d = {}
for i in range(5):
   d[i] = i
for i in range(5):
   del d[i]
for i in range(5, 9):  # i==8 was the problem
   d[i] = i