          """
          upload = SimpleUploadedFile("file.txt", b"file_content")
          request = Request(factory.post('/', {'upload': upload}))
          request.parsers = (FormParser(), MultiPartParser())
          assert list(request.POST.keys()) == []
          assert list(request.FILES.keys()) == ['upload']
  
      def test_standard_behaviour_determines_form_content_PUT(self):
          """
          Ensure request.data returns content for PUT request with form content.
          """
 
</s> remove         assert list(serializer.validated_data.keys()) == []
 </s> add         assert list(serializer.validated_data) == [] </s> remove         assert list(response.data['actions'].keys()) == ['PUT']
 </s> add         assert list(response.data['actions']) == ['PUT'] </s> remove         assert set(serializer.data.keys()) == {'name', 'ref'}
 </s> add         assert set(serializer.data) == {'name', 'ref'} </s> remove         assert set(serializer.data.keys()) == {'name1', 'name2', 'id'}
 </s> add         assert set(serializer.data) == {'name1', 'name2', 'id'} </s> remove         assert list(serializer.validated_data.keys()) == ['message']
 </s> add         assert list(serializer.validated_data) == ['message']
        assert list(request.POST) == []
        assert list(request.FILES) == ['upload']
          """
          upload = SimpleUploadedFile("file.txt", b"file_content")
          request = Request(factory.post('/', {'upload': upload}))
          request.parsers = (FormParser(), MultiPartParser())
        assert list(request.POST) == []
        assert list(request.FILES) == ['upload']
        assert list(request.POST) == []
        assert list(request.FILES) == ['upload']
  
      def test_standard_behaviour_determines_form_content_PUT(self):
          """
          Ensure request.data returns content for PUT request with form content.
          """
keep keep keep keep replace replace keep keep keep keep keep
 Perfer iter(dict) over iter(dict.keys()) (#5736)

Calling dict.keys() is unnecessary. The two are functionally equivalent
on modern Pythons.

Inspired by Lennart Regebro's talk "Prehistoric Patterns in Python" from
PyCon 2017.

https://www.youtube.com/watch?v=V5-JH23Vk0I 
tests/test_request.py