rspec users - Aug 2010 - How do I write specs for Rails 3 view block helpers that use #with_output_buffer(&block) ?

I found this:
http://stackoverflow.com/questions/197164/how-do-i-test-rails-block-helpers-with-rspec

  it ''should do something'' do
    helper.some_block_helper { the_block_code }.should XXXX
  end

but not sure how to use it

I have a module which is extended on top of ActiveView::Base

module MyViewExt
    def area(clazz, &block)
      content = with_output_buffer(&block)
      content_tag :div, content, :class => clazz
    end
end

How would I go about testing this in isolation, especially that the
effect of using #with_output_buffer(&block)
is as expected (especially when I have nested calls of view helpers
using this approach!).

Thanks.

I have finally come up with a workable solution

http://gist.github.com/545866

module MyViewHelper
  def tab_for(clazz, &block)
    content = with_output_buffer(&block)
    content_tag :li, content, :class => clazz
  end
end

module MyOtherViewHelper
...
end


describe "do it" do
  it "works" do
    ActionViewTester.tests MyViewHelper, MyOtherViewHelper
    ActionViewTester.new do |helper|
      helper.tab_for(''kristian'') { ''hello''
}.should match /kristian/
      helper.hello(''david'') { ''hello''
}.should match /david/
    end
  end
end

On Aug 23, 4:04?pm, Kristian Mandrup <kmandrup.git... at gmail.com>
wrote:
> I found
this:http://stackoverflow.com/questions/197164/how-do-i-test-rails-block-h...
>
> ? it ''should do something'' do
> ? ? helper.some_block_helper { the_block_code }.should XXXX
> ? end
>
> but not sure how to use it
>
> I have a module which is extended on top of ActiveView::Base
>
> module MyViewExt
> ? ? def area(clazz, &block)
> ? ? ? content = with_output_buffer(&block)
> ? ? ? content_tag :div, content, :class => clazz
> ? ? end
> end
>
> How would I go about testing this in isolation, especially that the
> effect of using #with_output_buffer(&block)
> is as expected (especially when I have nested calls of view helpers
> using this approach!).
>
> Thanks.
> _______________________________________________
> rspec-users mailing list
> rspec-us... at
rubyforge.orghttp://rubyforge.org/mailman/listinfo/rspec-users

I packed it up into a useful reusable gem ;)

http://github.com/kristianmandrup/rspec-action_view

Only these dependencies :)

require ''rspec''
require ''action_view''
require ''active_support/railtie''
require ''action_view/template/handlers/erb''


Now allows for this DSL

describe "My ViewHelpers" do
  it "should render content as expected" do
    setup_action_view do
      tests MyViewHelper, MyOtherViewHelper
    end

    with_action_view do |view|
      view.tab_for(''kristian'') { ''hello''
}.should match /kristian/
      view.hello(''david'') { ''hello'' }.should
match /david/

      with_action_view do |view|
        view.with_template(%{
          <%= tab_for(''kristian'') {
''hello'' } %>
        }).should match /hello/
    end
  end
end

Enjoy!

On Aug 23, 8:51?pm, Kristian Mandrup <kmandrup.git... at gmail.com>
wrote:
> I have finally come up with a workable solution
>
> http://gist.github.com/545866
>
> module MyViewHelper
> ? def tab_for(clazz, &block)
> ? ? content = with_output_buffer(&block)
> ? ? content_tag :li, content, :class => clazz
> ? end
> end
>
> module MyOtherViewHelper
> ...
> end
>
> describe "do it" do
> ? it "works" do
> ? ? ActionViewTester.tests MyViewHelper, MyOtherViewHelper
> ? ? ActionViewTester.new do |helper|
> ? ? ? helper.tab_for(''kristian'') {
''hello'' }.should match /kristian/
> ? ? ? helper.hello(''david'') { ''hello''
}.should match /david/
> ? ? end
> ? end
> end
>
> On Aug 23, 4:04?pm, Kristian Mandrup <kmandrup.git... at gmail.com>
> wrote:
>
> > I found
this:http://stackoverflow.com/questions/197164/how-do-i-test-rails-block-h...
>
> > ? it ''should do something'' do
> > ? ? helper.some_block_helper { the_block_code }.should XXXX
> > ? end
>
> > but not sure how to use it
>
> > I have a module which is extended on top of ActiveView::Base
>
> > module MyViewExt
> > ? ? def area(clazz, &block)
> > ? ? ? content = with_output_buffer(&block)
> > ? ? ? content_tag :div, content, :class => clazz
> > ? ? end
> > end
>
> > How would I go about testing this in isolation, especially that the
> > effect of using #with_output_buffer(&block)
> > is as expected (especially when I have nested calls of view helpers
> > using this approach!).
>
> > Thanks.
> > _______________________________________________
> > rspec-users mailing list
> > rspec-us... at
rubyforge.orghttp://rubyforge.org/mailman/listinfo/rspec-users
>
> _______________________________________________
> rspec-users mailing list
> rspec-us... at
rubyforge.orghttp://rubyforge.org/mailman/listinfo/rspec-users