How can I test pdf generation in Rails using Cucumber/Rspec + Prawn + Prawnto?

[Cássio Marques]

Hi everyone!

I'm using Prawn + Prawnto in my Rails application to generate pdfs. I
would like to know how could I test it using Cucumber (assert that the
pdf was generated and sent to the browser) and how could I test the
pdf contents with Rspec. Has anyone tried this?

Thanks!

[Daniel Nelson]

Hello Cássio,

To check in Cucumber, you could have a line like "Then I should see "%PDF-1.3".

One possibility for testing content of the PDF would be to use
pdf-inspector, just like Prawn does in its specs.

Cheers,

Daniel

[Cássio Marques]

Hum... the approach for Cucumber seems very obvious... but I didn't think of that. Thanks!

For the rspec part, I'm just wondering how to intercept the pdf generated by prawnto, since it sends it directly to the browser. I don't  know where I can have access to it when it's generated. Maybe in a controller test through response.body?

Thanks!

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Cássio Marques

Blog: http://cassiomarques.wordpress.com

If you're writing code and you're not testing it, the code is wrong. I don't care if it does the right thing, and people need to understand this. If it works by accident, you're still wrong.
Bryan Liles - Ruby Hoedown 2008

[Gregory Brown]

2010/2/4 Cássio Marques <cass...@gmail.com>:

> Hum... the approach for Cucumber seems very obvious... but I didn't think of
> that. Thanks!
> For the rspec part, I'm just wondering how to intercept the pdf generated by
> prawnto, since it sends it directly to the browser. I don't  know where I
> can have access to it when it's generated. Maybe in a controller test
> through response.body?

Though not an answer to your question, you could avoid using Prawnto,
and that would solve the problem :)
http://wiki.github.com/sandal/prawn/using-prawn-in-rails

[Daniel Nelson]

Since PDF output is a view, I wouldn't test it with a controller spec.
I use Cucumber for all of my view checks. You could build a custom
step that analyzes the returned content.

-Daniel

[Cássio Marques]

Hum... yes, in fact Cucumber would be better for this.

Thanks everyone!

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