text: from unittest import TestCase
  from tgt_grease.core import GreaseContainer, Logging, Configuration, Notifications
  from tgt_grease.core.Connectivity import Mongo
  from pymongo.collection import Collection
  
  
  class TestIOC(TestCase):
      def test_logger(self):
          ioc = GreaseContainer()
          self.assertTrue(isinstance(ioc.getLogger(), Logging))
  
      def test_config(self):
          ioc = GreaseContainer()
          self.assertTrue(isinstance(ioc.getConfig(), Configuration))
  
      def test_notifications(self):
          ioc = GreaseContainer()
          self.assertTrue(isinstance(ioc.getNotification(), Notifications))
  
      def test_mongo(self):
          ioc = GreaseContainer()
          self.assertTrue(isinstance(ioc.getMongo(), Mongo))
  
      def test_get_collection(self):
          ioc = GreaseContainer()
          self.assertTrue(isinstance(ioc.getMongo(), Mongo))
          coll = ioc.getCollection('TestCollection')
          self.assertTrue(isinstance(coll, Collection))
          self.assertEqual(coll.name, "TestCollection")
  
      def test_registration(self):
          ioc = GreaseContainer()
          self.assertTrue(ioc.ensureRegistration())
  