To add tempfile method to Rack::Test::UploadedFile to make it like ActionDispatch::Http::UploadedFile

gistfile1.md

The CSV.foreach method cexpects a string of a file to open. ActionDispatch::Http::UploadedFile has a #tempfile method which is good enough to pass into File.open like CSV.foreach does. Rack::Test::UploadedFile doesn't (and probably won't: rails/rails#799, rack/rack-test#30).

I added it like this:

# in spec/support/add_tempfile_to_test_uploaded_file.rb

class Rack::Test::UploadedFile
  def tempfile
    @tempfile
  end
end