class_docstr: Test case to make sure that the Django Statement model
  and ChatterBot Statement object have a common interface.
class_docstr_tok: ["Test","case","to","make","sure","that","the","Django","Statement","model","and","ChatterBot","Statement","object","have","a","common","interface","."]
code: def test_add_tags(self):
      self.object.add_tags("a", "b")
      self.model.add_tags("a", "b")
  
      self.assertIn("a", self.object.get_tags())
      self.assertIn("a", self.model.get_tags())
  
file_path: ChatterBot/tests_django/test_statement_integration.py
imports: from django.test import TestCase
  from chatterbot.conversation import Statement
  from chatterbot.ext.django_chatterbot.models import Statement
label_desc: Use image node_id 7 for calling the StatementIntegrationTestCase obj's underlying member method code with example usage: obj.test_add_tags() without return types