Re: Problem with unexpected nil in assert_select

James Byrne
Fri, 10 Sep 2010 16:34:09 -0000

James Byrne wrote:

>
> Running the cucumber feature that invokes this step generates the
> following error:
>
>       undefined method `content_type'' for nil:NilClass
(NoMethodError)
>       /home/byrnejb/.rvm/gems/ruby-1.8.7-p302/gems/activesupport-3.0.0/
> lib/active_support/whiny_nil.rb:48:in `method_missing''
>       /home/byrnejb/.rvm/gems/ruby-1.8.7-p302/gems/actionpack-3.0.0/
> lib/action_dispatch/testing/assertions/selector.rb:605:in
> `response_from_page_or_rjs''
>       /home/byrnejb/.rvm/gems/ruby-1.8.7-p302/gems/actionpack-3.0.0/
> lib/action_dispatch/testing/assertions/selector.rb:213:in
> `assert_select''
>       /home/byrnejb/Software/Development/Projects/proforma.git/
> features/app/models/users/step_definitions/
> user_authentication_steps.rb:56
>
> The response.body inside the step definition contains exactly what I
> expect:
>
>
>      To Proceed Please Authenticate Your Identity
>
>
> What do I need to change to get this test to work in Rails-3.0.0?

Is there some place that lists the valid syntax for a css selector as
used by ActionDispatch?  I can only surmise that the argument value is
invalid for some reason.