Add assertJSONEqual method to TestCase

            self.assertTrue(real_count != 0,

                msg_prefix + "Couldn't find '%s' in response" % needle)

    def assertJSONEqual(self, raw, expected_data, msg=None):

        try:

            data = json.loads(raw)

        except ValueError:

            self.fail("First argument is not valid JSON: %r" % raw)

        if isinstance(expected_data, six.string_types):

            try:

                expected_data = json.loads(expected_data)

            except ValueError:

                self.fail("Second argument is not valid JSON: %r" % expected_data)

        self.assertEqual(data, expected_data, msg=msg)

    def assertXMLEqual(self, xml1, xml2, msg=None):

        """

        Asserts that two XML snippets are semantically the same.