code: def test_marshal_tuple(self):
      model = OrderedDict({"foo": fields.Raw})
      marshal_fields = OrderedDict([("foo", "bar"), ("bat", "baz")])
      output = marshal((marshal_fields,), model)
      assert output == [{"foo": "bar"}]
  
imports: from __future__ import unicode_literals
  import pytest
  from flask_restplus import marshal, marshal_with, marshal_with_field, fields, Api, Resource
label_desc: Use image node_id 17 for calling the MarshallingTest obj's underlying member method code with example usage: obj.test_marshal_tuple() without return types