text: from django.core.exceptions import ObjectDoesNotExist
  from django.test import TestCase
  from .models import BaseManagerModel, RenameManagerModel, ReplaceManagerModel, MultipleManagerModel
  
  
  class TestModelIdent(TestCase):
      def setUp(self):
          self.base_model = BaseManagerModel.create()
          self.rename_model = RenameManagerModel.create()
          self.replace_model = ReplaceManagerModel.create()
          self.multiple_model = MultipleManagerModel.create()
  
      def test_created(self):
          self.assertEqual(BaseManagerModel.objects.get(pk=1), self.base_model)
          self.assertEqual(RenameManagerModel.instances.get(pk=1), self.rename_model)
          self.assertEqual(MultipleManagerModel.objects.get(pk=1), self.multiple_model)
          with self.assertRaises(ObjectDoesNotExist):
              ReplaceManagerModel.objects.get(pk=1)
          with self.assertRaises(ObjectDoesNotExist):
              MultipleManagerModel.instances.get(pk=1)
  
      def test_ident(self):
          self.assertEquals(BaseManagerModel.ident_(1).pk, 1)
  
      def test_non_existant_pk(self):
          with self.assertRaises(ObjectDoesNotExist):
              BaseManagerModel.ident_(2)
  