## A simple HAML helper [ruby]
module ApplicationHelper
  # display a flash message, when one is available
  # usage:  (in haml)
  #   - display_flash
  def display_flash
    for name in [:notice, :warning, :error]
      if flash[name]
        haml_tag :div, flash[name], {:class => name.to_s}
      end
    end
    nil
  end
end

## RSpec for the helper [ruby]
describe ApplicationHelper do
  include ApplicationHelper
  include ActionView::Helpers
  include Haml::Helpers

  before(:all) do
    @haml_is_haml = true
    @haml_stack = [Haml::Buffer.new(:attr_wrapper => "'")]
  end

  it "should display flash" do
    for name in [ :notice, :warning, :error ]
      flash[name] = "flash #{name.to_s} message"
      capture_haml {
        display_flash
      }.should have_tag( "div.#{name.to_s}", 1, :text => flash[name] )
    end
  end
end

## Error!!!
1)
NoMethodError in 'ApplicationHelper should display flash'
You have a nil object when you didn't expect it!
The error occurred while evaluating nil.buffer
/home/evgeny/.gems/gems/haml-1.9.0/lib/haml/helpers.rb:255:in `capture_haml'
./spec/helpers/application_helper_spec.rb:16:
./spec/helpers/application_helper_spec.rb:14:in `each'
./spec/helpers/application_helper_spec.rb:14:
script/spec:4:


## HELP