test PDF generation by Prawn in a controller spec

[Javix]

According the Prawn wiki at https://github.com/prawnpdf/prawn/wiki/Using-Prawn-in-Rails-3, what is the way to test a PDF generation method in the controller spec:

class HelloController < ApplicationController
   def index
    output = HelloReport.new.to_pdf

    respond_to do |format|
      format.pdf do
        send_data output, :filename => "hello.pdf", 
                          :type => "application/pdf"
      end
    end
  end
end

Thanks

[Irish]

This is how I do it for CSVs file downloads, you can basically do the same thing for PDFs.  Obviously the content disposition would be different though.

https://gist.github.com/4138045

[Javix]

Thanks a lot, Irish, it works for me.