Forum: RSpec 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...@gmail.com>

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...@gmail.com>