Fixed #18561 -- Made HttpResponse.tell() support non-ascii chars

    def tell(self):

        if self._base_content_is_iter:

            raise Exception("This %s instance cannot tell its position" % self.__class__)

        return sum([len(str(chunk)) for chunk in self._container])

        return sum([len(chunk) for chunk in self])

class HttpResponseRedirect(HttpResponse):

    status_code = 302

# -*- encoding: utf-8 -*-

from __future__ import unicode_literals

import copy

        self.assertRaises(UnicodeEncodeError,

                          getattr, r, 'content')

    def test_file_interface(self):

        r = HttpResponse()

        r.write(b"hello")

        self.assertEqual(r.tell(), 5)

        r.write("привет")

        self.assertEqual(r.tell(), 17)

        r = HttpResponse(['abc'])

        self.assertRaises(Exception, r.write, 'def')

class CookieTests(unittest.TestCase):

    def test_encode(self):

        """