text: import datetime
  
  from django.core.exceptions import ImproperlyConfigured, ObjectDoesNotExist
  from django.test import TestCase, override_settings
  from django.test.client import RequestFactory
  from django.views.generic.base import View
  from django.views.generic.detail import SingleObjectTemplateResponseMixin
  from django.views.generic.edit import ModelFormMixin
  
  from .models import Artist, Author, Book, Page
  
  
  @override_settings(ROOT_URLCONF='generic_views.urls')
  class DetailViewTest(TestCase):
  
      @classmethod
      def setUpTestData(cls):
          cls.artist1 = Artist.objects.create(name='Rene Magritte')
          cls.author1 = Author.objects.create(name='Roberto Bolaño', slug='roberto-bolano')
          cls.author2 = Author.objects.create(name='Scott Rosenberg', slug='scott-rosenberg')
          cls.book1 = Book.objects.create(name='2066', slug='2066', pages=800, pubdate=datetime.date(2008, 10, 1))
          cls.book1.authors.add(cls.author1)
          cls.book2 = Book.objects.create(
              name='Dreaming in Code', slug='dreaming-in-code', pages=300, pubdate=datetime.date(2006, 5, 1)
          )
          cls.page1 = Page.objects.create(
              content='I was once bitten by a moose.', template='generic_views/page_template.html'
          )
  
      def test_simple_object(self):
          res = self.client.get('/detail/obj/')
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], {'foo': 'bar'})
          self.assertIsInstance(res.context['view'], View)
          self.assertTemplateUsed(res, 'generic_views/detail.html')
  
      def test_detail_by_pk(self):
          res = self.client.get('/detail/author/%s/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.author1)
          self.assertEqual(res.context['author'], self.author1)
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_detail_missing_object(self):
          res = self.client.get('/detail/author/500/')
          self.assertEqual(res.status_code, 404)
  
      def test_detail_object_does_not_exist(self):
          with self.assertRaises(ObjectDoesNotExist):
              self.client.get('/detail/doesnotexist/1/')
  
      def test_detail_by_custom_pk(self):
          res = self.client.get('/detail/author/bycustompk/%s/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.author1)
          self.assertEqual(res.context['author'], self.author1)
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_detail_by_slug(self):
          res = self.client.get('/detail/author/byslug/scott-rosenberg/')
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], Author.objects.get(slug='scott-rosenberg'))
          self.assertEqual(res.context['author'], Author.objects.get(slug='scott-rosenberg'))
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_detail_by_custom_slug(self):
          res = self.client.get('/detail/author/bycustomslug/scott-rosenberg/')
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], Author.objects.get(slug='scott-rosenberg'))
          self.assertEqual(res.context['author'], Author.objects.get(slug='scott-rosenberg'))
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_detail_by_pk_ignore_slug(self):
          res = self.client.get('/detail/author/bypkignoreslug/%s-roberto-bolano/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.author1)
          self.assertEqual(res.context['author'], self.author1)
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_detail_by_pk_ignore_slug_mismatch(self):
          res = self.client.get('/detail/author/bypkignoreslug/%s-scott-rosenberg/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.author1)
          self.assertEqual(res.context['author'], self.author1)
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_detail_by_pk_and_slug(self):
          res = self.client.get('/detail/author/bypkandslug/%s-roberto-bolano/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.author1)
          self.assertEqual(res.context['author'], self.author1)
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_detail_by_pk_and_slug_mismatch_404(self):
          res = self.client.get('/detail/author/bypkandslug/%s-scott-rosenberg/' % self.author1.pk)
          self.assertEqual(res.status_code, 404)
  
      def test_verbose_name(self):
          res = self.client.get('/detail/artist/%s/' % self.artist1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.artist1)
          self.assertEqual(res.context['artist'], self.artist1)
          self.assertTemplateUsed(res, 'generic_views/artist_detail.html')
  
      def test_template_name(self):
          res = self.client.get('/detail/author/%s/template_name/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.author1)
          self.assertEqual(res.context['author'], self.author1)
          self.assertTemplateUsed(res, 'generic_views/about.html')
  
      def test_template_name_suffix(self):
          res = self.client.get('/detail/author/%s/template_name_suffix/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.author1)
          self.assertEqual(res.context['author'], self.author1)
          self.assertTemplateUsed(res, 'generic_views/author_view.html')
  
      def test_template_name_field(self):
          res = self.client.get('/detail/page/%s/field/' % self.page1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.page1)
          self.assertEqual(res.context['page'], self.page1)
          self.assertTemplateUsed(res, 'generic_views/page_template.html')
  
      def test_context_object_name(self):
          res = self.client.get('/detail/author/%s/context_object_name/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.author1)
          self.assertEqual(res.context['thingy'], self.author1)
          self.assertNotIn('author', res.context)
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_duplicated_context_object_name(self):
          res = self.client.get('/detail/author/%s/dupe_context_object_name/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'], self.author1)
          self.assertNotIn('author', res.context)
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_custom_detail(self):
          """
          AuthorCustomDetail overrides get() and ensures that
          SingleObjectMixin.get_context_object_name() always uses the obj
          parameter instead of self.object.
          """
          res = self.client.get('/detail/author/%s/custom_detail/' % self.author1.pk)
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['custom_author'], self.author1)
          self.assertNotIn('author', res.context)
          self.assertNotIn('object', res.context)
          self.assertTemplateUsed(res, 'generic_views/author_detail.html')
  
      def test_deferred_queryset_template_name(self):
          class FormContext(SingleObjectTemplateResponseMixin):
              request = RequestFactory().get('/')
              model = Author
              object = Author.objects.defer('name').get(pk=self.author1.pk)
  
          self.assertEqual(FormContext().get_template_names()[0], 'generic_views/author_detail.html')
  
      def test_deferred_queryset_context_object_name(self):
          class FormContext(ModelFormMixin):
              request = RequestFactory().get('/')
              model = Author
              object = Author.objects.defer('name').get(pk=self.author1.pk)
              fields = ('name',)
  
          form_context_data = FormContext().get_context_data()
          self.assertEqual(form_context_data['object'], self.author1)
          self.assertEqual(form_context_data['author'], self.author1)
  
      def test_invalid_url(self):
          with self.assertRaises(AttributeError):
              self.client.get('/detail/author/invalid/url/')
  
      def test_invalid_queryset(self):
          msg = (
              'AuthorDetail is missing a QuerySet. Define AuthorDetail.model, '
              'AuthorDetail.queryset, or override AuthorDetail.get_queryset().'
          )
          with self.assertRaisesMessage(ImproperlyConfigured, msg):
              self.client.get('/detail/author/invalid/qs/')
  
      def test_non_model_object_with_meta(self):
          res = self.client.get('/detail/nonmodel/1/')
          self.assertEqual(res.status_code, 200)
          self.assertEqual(res.context['object'].id, "non_model_1")
  