Add failing test for request.version AttributeError in BrowsableAPI.

tests/browsable_api/auth_urls.py

 from __future__ import unicode_literals
 from django.conf.urls import patterns, url, include
+from rest_framework import routers
 
-from .views import MockView
+from .views import MockView, FooViewSet, BarViewSet
+
+router = routers.SimpleRouter()
+router.register(r'foo', FooViewSet)
+router.register(r'bar', BarViewSet)
 
 urlpatterns = patterns(
     '',
     (r'^$', MockView.as_view()),
+    url(r'^', include(router.urls)),
+    url(r'^bar/(?P<pk>\d+)/$', BarViewSet, name='bar-list'),
     url(r'^auth/', include('rest_framework.urls', namespace='rest_framework')),
 )

tests/browsable_api/test_browsable_api.py

@@ -3,6 +3,7 @@ from django.contrib.auth.models import User
 from django.test import TestCase
 
 from rest_framework.test import APIClient
+from .models import Foo, Bar
 
 
 class DropdownWithAuthTests(TestCase):
@@ -16,6 +17,8 @@ class DropdownWithAuthTests(TestCase):
         self.email = 'lennon@thebeatles.com'
         self.password = 'password'
         self.user = User.objects.create_user(self.username, self.email, self.password)
+        foo = Foo.objects.create(name='Foo')
+        Bar.objects.create(foo=foo)
 
     def tearDown(self):
         self.client.logout()
@@ -25,6 +28,13 @@ class DropdownWithAuthTests(TestCase):
         response = self.client.get('/')
         self.assertContains(response, 'john')
 
+    def test_bug_2455_clone_request(self):
+        self.client.login(username=self.username, password=self.password)
+        json_response = self.client.get('/foo/1/?format=json')
+        self.assertEqual(json_response.status_code, 200)
+        browsable_api_response = self.client.get('/foo/1/')
+        self.assertEqual(browsable_api_response.status_code, 200)
+
     def test_logout_shown_when_logged_in(self):
         self.client.login(username=self.username, password=self.password)
         response = self.client.get('/')

tests/browsable_api/views.py

 from __future__ import unicode_literals
 
 from rest_framework.views import APIView
+from rest_framework.viewsets import ModelViewSet
 from rest_framework import authentication
 from rest_framework import renderers
 from rest_framework.response import Response
+from rest_framework.renderers import BrowsableAPIRenderer, JSONRenderer
+from rest_framework.versioning import NamespaceVersioning
+from .models import Foo, Bar
+from .serializers import FooSerializer, BarSerializer
 
 
 class MockView(APIView):
@@ -13,3 +18,25 @@ class MockView(APIView):
 
     def get(self, request):
         return Response({'a': 1, 'b': 2, 'c': 3})
+
+
+class SerializerClassMixin(object):
+    def get_serializer_class(self):
+        # Get base name of serializer
+        self.request.version
+        return self.serializer_class
+
+
+class FooViewSet(SerializerClassMixin, ModelViewSet):
+    versioning_class = NamespaceVersioning
+    model = Foo
+    queryset = Foo.objects.all()
+    serializer_class = FooSerializer
+    renderer_classes = (BrowsableAPIRenderer, JSONRenderer)
+
+
+class BarViewSet(SerializerClassMixin, ModelViewSet):
+    model = Bar
+    queryset = Bar.objects.all()
+    serializer_class = BarSerializer
+    renderer_classes = (BrowsableAPIRenderer, )