[rspec-users] Mock UploadedFile object in controller params

[David Piegza]

Hi,

I'm trying to mock an UploadedFile object and pass it to a controller action. Unfortunately, the mocked object gets stringified in the params hash, so I'm not able to use the mock object in a test.

Is there any way to avoid this stringification for UploadedFile objects?

This has been discussed already on github: https://github.com/rails/rails/pull/1203

As described, the params are stringified, but it should exclude Rack::Test::UploadedFile: https://github.com/rails/rails/pull/1203#issuecomment-1217081

Here is a small example:

let(:file) { mock('UploadedFile') }

it "tests something" do
  file.stub(:content_type).and_return 'text/plain'   # this won't work
  post :upload, { file: file }                                          # params in controller will be "file" => "#[RSpec::Mock ... ]"
end

I get a NoMethodError: undefined method `content_type' for "#[RSpec::Mocks::Mock:0x3fe4723a81bc @name=\"file\"]":String

So, how can I test this?

Thanks,
David

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