code: def test_sentiment_classifier(self):
      m = self.model
      self.assertEqual(m.classifier.classes, [1, 2, 3, 5])
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import tempfile
  import turicreate
  from turicreate.toolkits._main import ToolkitError
  from turicreate.toolkits._internal_utils import _mac_ver
  from .None import util
  import sys
label_desc: Use image node_id 6 for calling the TextClassifierCreateTests obj's underlying member method code with example usage: obj.test_sentiment_classifier() without return types