'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.assertTrue(('xml' in all_formats)),)
    self.assertTrue(('xml' in public_formats))
    self.assertTrue(('json2' in all_formats))
    self.assertTrue(('json2' in public_formats))
    self.assertTrue(('python' in all_formats))
    self.assertFalse(('python' in public_formats))
