How to test a Rails 3 metal controller?

Hi!

I could not find an easy solution to this question: how can I properly
test an Rails controller action?

We were trying to run the following test:

get :show, :id => 'hello'
response.should redirect_to("http://www.google.com")

But we got:

undefined method `formats=’ for #LinksController:0x00000104000b40

After reading a couple of blog posts, we tried this work-around:

class LinksController
include ActionController::UrlFor
include ActionController::Testing
include Rails.application.routes.url_helpers
include AbstractController::ViewPaths
end

It works only partially, we’re now stuck with the limits of our monkey-
patching and get the following error:

undefined method `protected_instance_variables’ for
LinksController:Class

Well - is there a clean way to test our a Rails metal with RSpec?

Thanks for your support!

– Thibaut

On Mar 22, 2011, at 7:50 AM, Thibaut Barrère [email protected]
wrote:

But we got:
end

It works only partially, we’re now stuck with the limits of our monkey-
patching and get the following error:

undefined method `protected_instance_variables’ for
LinksController:Class

Well - is there a clean way to test our a Rails metal with RSpec?

Use a request spec (in spec/requests) instead of a controller spec.

Hello David,

Use a request spec (in spec/requests) instead of a controller spec.

Thanks, it worked perfectly!

I only encountered a “stack level too deep” error, which was solved by
upgrading rspec from 2.0.1 to 2.5.0, if it helps someone.

Thanks again!

– Thibaut

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