def assertRedirects(self, response, expected_url, status_code=302,
                        target_status_code=200, host=None, msg_prefix=''):
        if msg_prefix:
            msg_prefix += ": "

        if hasattr(response, 'redirect_chain'):
            # The request was a followed redirect
            self.assertTrue(len(response.redirect_chain) > 0,
                msg_prefix + "Response didn't redirect as expected: Response"
                " code was %d (expected %d)" %
                    (response.status_code, status_code))

            self.assertEqual(response.redirect_chain[0][1], status_code,
                msg_prefix + "Initial response didn't redirect as expected:"
                " Response code was %d (expected %d)" %
                    (response.redirect_chain[0][1], status_code))

            url, status_code = response.redirect_chain[-1]

            self.assertEqual(response.status_code, target_status_code,
                msg_prefix + "Response didn't redirect as expected: Final"
                " Response code was %d (expected %d)" %
                    (response.status_code, target_status_code))

        else:
            # Not a followed redirect
            self.assertEqual(response.status_code, status_code,
                msg_prefix + "Response didn't redirect as expected: Response"
                " code was %d (expected %d)" %
                    (response.status_code, status_code))

            url = response['Location']
            scheme, netloc, path, query, fragment = urlsplit(url)

            redirect_response = response.client.get(path, QueryDict(query))

            # Get the redirection page, using the same client that was used
            # to obtain the original response.
            self.assertEqual(redirect_response.status_code, target_status_code,
                msg_prefix + "Couldn't retrieve redirection page '%s':"
                " response code was %d (expected %d)" %
                    (path, redirect_response.status_code, target_status_code))

        e_scheme, e_netloc, e_path, e_query, e_fragment = urlsplit(
                                                              expected_url)
        if not (e_scheme or e_netloc):
            expected_url = urlunsplit(('http', host or 'testserver', e_path,
                e_query, e_fragment))

        self.assertEqual(url, expected_url,
            msg_prefix + "Response redirected to '%s', expected '%s'" %
                (url, expected_url))
Asserts that a response redirected to a specific URL, and that the
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/test/testcases.py/TransactionTestCase.assertRedirects