def test_commit(self):

       self.wc.checkout(self.repo)

       p = self.wc.join("a_file")

       p.write("test file")

       p.add()

       rev = self.wc.commit("some test")

       assert p.info().rev == 1

       assert rev == 1

->     rev = self.wc.commit()

       assert rev is None

   def commit(self, msg='', rec=1):

       """ commit with support for non-recursive commits """

       from py.__.path.svn import cache

       # XXX i guess escaping should be done better here?!?

       cmd = 'commit -m "%s" --force-log' % (msg.replace('"', '\\"'),)

       if not rec:

           cmd += ' -N'

       out = self._authsvn(cmd)

       try:

->         del cache.info[self]

       except KeyError:

           pass

       if out: 

           m = self._rex_commit.match(out)

           return int(m.group(1))