How-to spec this helper method?

Hey gang,

I have this dead-simple method defined in a helper:

def add_category_link(name)
link_to_function name do |page|
page.insert_html :bottom, :categories, :partial =>
‘category’, :object => Category.new
end
end

Where, and mostly how, would I spec this? I haven’t been able to find
how to stub the rjs in a helper spec, so I’d appreciate any pointers
whatsoever…

thanks!
bartz

On Dec 20, 2007 4:31 AM, Bart Z. [email protected] wrote:

Where, and mostly how, would I spec this? I haven’t been able to find
how to stub the rjs in a helper spec, so I’d appreciate any pointers
whatsoever…

If you can spec it in a template using rjs, you can do it in a helper:

describe FooHelper do
it “should build a category link” do
add_category_link(:foo).should have_rjs(…)
end
end

“should have_rjs” is a wrapper for assert_select_rjs in rails.

HTH,
David

On 24 dec 2007, at 05:09, David C. wrote:

end

add_category_link(:foo).should have_rjs(…)
end
end

Thanks! However, I am getting an error about ‘nil.render’ now, with
this backtrace:

You have a nil object when you didn’t expect it!
The error occurred while evaluating nil.render
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_view/
helpers/prototype_helper.rb:956:in render' /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_view/ helpers/prototype_helper.rb:727:ininsert_html’
/Users/bartz/Documents/workspace/blog/app/helpers/admin/
admin_helper.rb:34:in __instance_exec0' /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/ active_support/core_ext/object/extending.rb:52:insend’
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/
active_support/core_ext/object/extending.rb:52:in instance_exec' /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_view/ helpers/prototype_helper.rb:581:ininitialize’
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_view/
helpers/prototype_helper.rb:992:in new' /opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_view/ helpers/prototype_helper.rb:992:inupdate_page’
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_view/
helpers/javascript_helper.rb:87:in `link_to_function’

No idea how to fix this :(…

thanks in advance, and happy Christmas and all!
bartz

On Dec 24, 2007 7:48 AM, Bart Z. [email protected] wrote:

def add_category_link(name)
If you can spec it in a template using rjs, you can do it in a helper:

describe FooHelper do
it “should build a category link” do
add_category_link(:foo).should have_rjs(…)
end
end

Thanks! However, I am getting an error about ‘nil.render’ now, with
this backtrace:

Just for fun - try putting it in a view specs instead and include the
helper:

describe “FooHelper”, :type => :view do
include FooHelper

etc

end

It might be that view specs have services you need for this example
that don’t exist in helper specs. If it works, then you can use that
as a workaround for now and we know where the deficiency lies. If so,
please submit a ticket at http://rspec.lighthouseapp.com/.

Cheers,
David

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