def test_dump(self):

       import tempfile

       for bin in 0, 1: 

           try:

               fd, name = tempfile.mkstemp()

               f = py.std.os.fdopen(fd)

           except AttributeError:

               name = tempfile.mktemp()

               f = open(name, 'w+')

           try:

               d = {'answer' : 42}

               path = local(name)

->             path.dump(d, bin=bin)

               from cPickle import load

               dnew = load(f)

               assert d == dnew

           finally:

               f.close()

               py.std.os.remove(name)