'Requesting a list of serializer formats popuates the registry'

def test_builtin_serializers(self):

    all_formats = set(serializers.get_serializer_formats())
    public_formats = set(serializers.get_public_serializer_formats())
    (self.assertIn(u'xml', all_formats),)
    self.assertIn(u'xml', public_formats)
    self.assertIn(u'json2', all_formats)
    self.assertIn(u'json2', public_formats)
    self.assertIn(u'python', all_formats)
    self.assertNotIn(u'python', public_formats)
