Fixed #27184 -- Allowed uploading TemporaryFile with the test client.

Thanks Federico Capoano for finishing the patch.

tests/test_client/tests.py

@@ -22,6 +22,8 @@ rather than the HTML rendered to the end-user.
 """
 from __future__ import unicode_literals
 
+import tempfile
+
 from django.contrib.auth.models import User
 from django.core import mail
 from django.http import HttpResponse
@@ -714,6 +716,11 @@ class ClientTest(TestCase):
         with self.assertRaisesMessage(Exception, 'exception message'):
             self.client.get('/nesting_exception_view/')
 
+    def test_uploading_temp_file(self):
+        test_file = tempfile.TemporaryFile()
+        response = self.client.post('/upload_view/', data={'temp_file': test_file})
+        self.assertEqual(response.content, b'temp_file')
+
 
 @override_settings(
     MIDDLEWARE=['django.middleware.csrf.CsrfViewMiddleware'],

tests/test_client/urls.py

@@ -5,6 +5,7 @@ from django.views.generic import RedirectView
 from . import views
 
 urlpatterns = [
+    url(r'^upload_view/$', views.upload_view, name='upload_view'),
     url(r'^get_view/$', views.get_view, name='get_view'),
     url(r'^post_view/$', views.post_view),
     url(r'^trace_view/$', views.trace_view),

tests/test_client/views.py

@@ -324,3 +324,8 @@ def nesting_exception_view(request):
 
 def django_project_redirect(request):
     return HttpResponseRedirect('https://www.djangoproject.com/')
+
+
+def upload_view(request):
+    """Prints keys of request.FILES to the response."""
+    return HttpResponse(', '.join(request.FILES.keys()))