text: from __future__ import unicode_literals
  from django.conf.urls import patterns, url, include
  from django.test import TestCase
  from django.utils import six
  from tests.models import BasicModel, BasicModelSerializer
  from rest_framework.response import Response
  from rest_framework.views import APIView
  from rest_framework import generics
  from rest_framework import routers
  from rest_framework import status
  from rest_framework.renderers import (
      BaseRenderer,
      JSONRenderer,
      BrowsableAPIRenderer
  )
  from rest_framework import viewsets
  from rest_framework.settings import api_settings
  
  
  class MockPickleRenderer(BaseRenderer):
      media_type = 'application/pickle'
  
  
  class MockJsonRenderer(BaseRenderer):
      media_type = 'application/json'
  
  
  class MockTextMediaRenderer(BaseRenderer):
      media_type = 'text/html'
  
  DUMMYSTATUS = status.HTTP_200_OK
  DUMMYCONTENT = 'dummycontent'
  
  RENDERER_A_SERIALIZER = lambda x: ('Renderer A: %s' % x).encode('ascii')
  RENDERER_B_SERIALIZER = lambda x: ('Renderer B: %s' % x).encode('ascii')
  
  
  class RendererA(BaseRenderer):
      media_type = 'mock/renderera'
      format = "formata"
  
      def render(self, data, media_type=None, renderer_context=None):
          return RENDERER_A_SERIALIZER(data)
  
  
  class RendererB(BaseRenderer):
      media_type = 'mock/rendererb'
      format = "formatb"
  
      def render(self, data, media_type=None, renderer_context=None):
          return RENDERER_B_SERIALIZER(data)
  
  
  class RendererC(RendererB):
      media_type = 'mock/rendererc'
      format = 'formatc'
      charset = "rendererc"
  
  
  class MockView(APIView):
      renderer_classes = (RendererA, RendererB, RendererC)
  
      def get(self, request, **kwargs):
          return Response(DUMMYCONTENT, status=DUMMYSTATUS)
  
  
  class MockViewSettingContentType(APIView):
      renderer_classes = (RendererA, RendererB, RendererC)
  
      def get(self, request, **kwargs):
          return Response(DUMMYCONTENT, status=DUMMYSTATUS, content_type='setbyview')
  
  
  class HTMLView(APIView):
      renderer_classes = (BrowsableAPIRenderer, )
  
      def get(self, request, **kwargs):
          return Response('text')
  
  
  class HTMLView1(APIView):
      renderer_classes = (BrowsableAPIRenderer, JSONRenderer)
  
      def get(self, request, **kwargs):
          return Response('text')
  
  
  class HTMLNewModelViewSet(viewsets.ModelViewSet):
      model = BasicModel
  
  
  class HTMLNewModelView(generics.ListCreateAPIView):
      renderer_classes = (BrowsableAPIRenderer,)
      permission_classes = []
      serializer_class = BasicModelSerializer
      model = BasicModel
  
  
  new_model_viewset_router = routers.DefaultRouter()
  new_model_viewset_router.register(r'', HTMLNewModelViewSet)
  
  
  urlpatterns = patterns(
      '',
      url(r'^setbyview$', MockViewSettingContentType.as_view(renderer_classes=[RendererA, RendererB, RendererC])),
      url(r'^.*\.(?P<format>.+)$', MockView.as_view(renderer_classes=[RendererA, RendererB, RendererC])),
      url(r'^$', MockView.as_view(renderer_classes=[RendererA, RendererB, RendererC])),
      url(r'^html$', HTMLView.as_view()),
      url(r'^html1$', HTMLView1.as_view()),
      url(r'^html_new_model$', HTMLNewModelView.as_view()),
      url(r'^html_new_model_viewset', include(new_model_viewset_router.urls)),
      url(r'^restframework', include('rest_framework.urls', namespace='rest_framework'))
  )
  
  
  # TODO: Clean tests bellow - remove duplicates with above, better unit testing, ...
  class RendererIntegrationTests(TestCase):
      """
      End-to-end testing of renderers using an ResponseMixin on a generic view.
      """
  
      urls = 'tests.test_response'
  
      def test_default_renderer_serializes_content(self):
          """If the Accept header is not set the default renderer should serialize the response."""
          resp = self.client.get('/')
          self.assertEqual(resp['Content-Type'], RendererA.media_type + '; charset=utf-8')
          self.assertEqual(resp.content, RENDERER_A_SERIALIZER(DUMMYCONTENT))
          self.assertEqual(resp.status_code, DUMMYSTATUS)
  
      def test_head_method_serializes_no_content(self):
          """No response must be included in HEAD requests."""
          resp = self.client.head('/')
          self.assertEqual(resp.status_code, DUMMYSTATUS)
          self.assertEqual(resp['Content-Type'], RendererA.media_type + '; charset=utf-8')
          self.assertEqual(resp.content, six.b(''))
  
      def test_default_renderer_serializes_content_on_accept_any(self):
          """If the Accept header is set to */* the default renderer should serialize the response."""
          resp = self.client.get('/', HTTP_ACCEPT='*/*')
          self.assertEqual(resp['Content-Type'], RendererA.media_type + '; charset=utf-8')
          self.assertEqual(resp.content, RENDERER_A_SERIALIZER(DUMMYCONTENT))
          self.assertEqual(resp.status_code, DUMMYSTATUS)
  
      def test_specified_renderer_serializes_content_default_case(self):
          """If the Accept header is set the specified renderer should serialize the response.
          (In this case we check that works for the default renderer)"""
          resp = self.client.get('/', HTTP_ACCEPT=RendererA.media_type)
          self.assertEqual(resp['Content-Type'], RendererA.media_type + '; charset=utf-8')
          self.assertEqual(resp.content, RENDERER_A_SERIALIZER(DUMMYCONTENT))
          self.assertEqual(resp.status_code, DUMMYSTATUS)
  
      def test_specified_renderer_serializes_content_non_default_case(self):
          """If the Accept header is set the specified renderer should serialize the response.
          (In this case we check that works for a non-default renderer)"""
          resp = self.client.get('/', HTTP_ACCEPT=RendererB.media_type)
          self.assertEqual(resp['Content-Type'], RendererB.media_type + '; charset=utf-8')
          self.assertEqual(resp.content, RENDERER_B_SERIALIZER(DUMMYCONTENT))
          self.assertEqual(resp.status_code, DUMMYSTATUS)
  
      def test_specified_renderer_serializes_content_on_accept_query(self):
          """The '_accept' query string should behave in the same way as the Accept header."""
          param = '?%s=%s' % (
              api_settings.URL_ACCEPT_OVERRIDE,
              RendererB.media_type
          )
          resp = self.client.get('/' + param)
          self.assertEqual(resp['Content-Type'], RendererB.media_type + '; charset=utf-8')
          self.assertEqual(resp.content, RENDERER_B_SERIALIZER(DUMMYCONTENT))
          self.assertEqual(resp.status_code, DUMMYSTATUS)
  
      def test_specified_renderer_serializes_content_on_format_query(self):
          """If a 'format' query is specified, the renderer with the matching
          format attribute should serialize the response."""
          resp = self.client.get('/?format=%s' % RendererB.format)
          self.assertEqual(resp['Content-Type'], RendererB.media_type + '; charset=utf-8')
          self.assertEqual(resp.content, RENDERER_B_SERIALIZER(DUMMYCONTENT))
          self.assertEqual(resp.status_code, DUMMYSTATUS)
  
      def test_specified_renderer_serializes_content_on_format_kwargs(self):
          """If a 'format' keyword arg is specified, the renderer with the matching
          format attribute should serialize the response."""
          resp = self.client.get('/something.formatb')
          self.assertEqual(resp['Content-Type'], RendererB.media_type + '; charset=utf-8')
          self.assertEqual(resp.content, RENDERER_B_SERIALIZER(DUMMYCONTENT))
          self.assertEqual(resp.status_code, DUMMYSTATUS)
  
      def test_specified_renderer_is_used_on_format_query_with_matching_accept(self):
          """If both a 'format' query and a matching Accept header specified,
          the renderer with the matching format attribute should serialize the response."""
          resp = self.client.get('/?format=%s' % RendererB.format,
                                 HTTP_ACCEPT=RendererB.media_type)
          self.assertEqual(resp['Content-Type'], RendererB.media_type + '; charset=utf-8')
          self.assertEqual(resp.content, RENDERER_B_SERIALIZER(DUMMYCONTENT))
          self.assertEqual(resp.status_code, DUMMYSTATUS)
  
  
  class Issue122Tests(TestCase):
      """
      Tests that covers #122.
      """
      urls = 'tests.test_response'
  
      def test_only_html_renderer(self):
          """
          Test if no infinite recursion occurs.
          """
          self.client.get('/html')
  
      def test_html_renderer_is_first(self):
          """
          Test if no infinite recursion occurs.
          """
          self.client.get('/html1')
  
  
  class Issue467Tests(TestCase):
      """
      Tests for #467
      """
  
      urls = 'tests.test_response'
  
      def test_form_has_label_and_help_text(self):
          resp = self.client.get('/html_new_model')
          self.assertEqual(resp['Content-Type'], 'text/html; charset=utf-8')
          self.assertContains(resp, 'Text comes here')
          self.assertContains(resp, 'Text description.')
  
  
  class Issue807Tests(TestCase):
      """
      Covers #807
      """
  
      urls = 'tests.test_response'
  
      def test_does_not_append_charset_by_default(self):
          """
          Renderers don't include a charset unless set explicitly.
          """
          headers = {"HTTP_ACCEPT": RendererA.media_type}
          resp = self.client.get('/', **headers)
          expected = "{0}; charset={1}".format(RendererA.media_type, 'utf-8')
          self.assertEqual(expected, resp['Content-Type'])
  
      def test_if_there_is_charset_specified_on_renderer_it_gets_appended(self):
          """
          If renderer class has charset attribute declared, it gets appended
          to Response's Content-Type
          """
          headers = {"HTTP_ACCEPT": RendererC.media_type}
          resp = self.client.get('/', **headers)
          expected = "{0}; charset={1}".format(RendererC.media_type, RendererC.charset)
          self.assertEqual(expected, resp['Content-Type'])
  
      def test_content_type_set_explictly_on_response(self):
          """
          The content type may be set explictly on the response.
          """
          headers = {"HTTP_ACCEPT": RendererC.media_type}
          resp = self.client.get('/setbyview', **headers)
          self.assertEqual('setbyview', resp['Content-Type'])
  
      def test_viewset_label_help_text(self):
          param = '?%s=%s' % (
              api_settings.URL_ACCEPT_OVERRIDE,
              'text/html'
          )
          resp = self.client.get('/html_new_model_viewset/' + param)
          self.assertEqual(resp['Content-Type'], 'text/html; charset=utf-8')
          self.assertContains(resp, 'Text comes here')
          self.assertContains(resp, 'Text description.')
  
      def test_form_has_label_and_help_text(self):
          resp = self.client.get('/html_new_model')
          self.assertEqual(resp['Content-Type'], 'text/html; charset=utf-8')
          self.assertContains(resp, 'Text comes here')
          self.assertContains(resp, 'Text description.')
  