def test_getrange(self):

       x = self.source[0:2]

->     assert x.isparseable()

       assert len(x.lines) == 2

       assert str(x) == "def f(x):\n    pass"

   def isparseable(self, deindent=True):

       """ return True if source is parseable, heuristically

               deindenting it by default. 

           """

       import parser

       if deindent:

->         source = str(self.deindent())

       else:

           source = str(self)

       try:

           parser.suite(source+'\n')

       except (parser.ParserError, SyntaxError):

           return False

       else:

           return True