On Jun 14, 2010, at 7:05 PM, David Chelimsky wrote:
> On Jun 14, 2010, at 6:40 PM, Marcelo de Moraes Serpa wrote:
>
>> Hey guys.
>>
>> I would like to test the following behavior:
>>
>> render :update do |page|
>> page.replace_html 'errors', :partial => 'signup_errors', :locals
>> => { :errors => 'errors'}
>> end
>> }
>>
>> I'm doing:
>>
>> controller.should_receive(:render).with(:update)
>>
>> But I am not sure on how to test the block. Maybe checking out what is the
>> class of the page var and setting up an expection on it?
>
> Hmmm. The common idiom for this is:
>
> page = double('page')
> controller.stub(:render).with(:update).and_yield(page)
> page.should_receive(:replace_html).with(...)
>
> This does not seem to work with rspec-2/rails-3. Don't know why yet (won't be
> able to look for a bit), but my guess is that something (like rspec :) ) is
> adding render() to the controller even later than this stub does. I'll follow
> up if I learn something.
Looks like action_pack calls render twice (the 2nd time in
action_controller/metal/implicit_render.rb:10:in `default_render'), so we've
got to stub the :render call twice:
page = double('page')
controller.stub(:render)
controller.stub(:render).with(:update).and_yield(page)
page.should_receive(:replace_html).with(...)
Bummer. It seems like this is a rails bug (render should only get called once,
and there is code that prevents it from being called twice, but not _all_ of
the time), but I'm not sure if I can make that case or not. I'll try :)
Cheers,
David
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