Custom RedCloth formatting

formatter.rb

require 'rubygems'
require 'redcloth'

module CustomHTML
  include RedCloth::Formatters::HTML
  def custom(opts)
    "<em>#{opts[:text].sub("hard.", "easy!")}</em>"
  end
end

formatter_test.rb

require 'test/unit'
require 'formatter'

class FormatterTest < Test::Unit::TestCase
  
  def test_output_is_formatted
    input = RedCloth.new %q{
h1. RedCloth Custom Tags

custom. Making a custom tag is hard.
}

    standard = %Q{<h1>RedCloth Custom Tags</h1>\n<p>custom. Making a custom tag is hard.</p>}
    assert_equal standard, input.to_html
    
    custom   = %Q{<h1>RedCloth Custom Tags</h1>\n<em>Making a custom tag is easy!</em>}
    assert_equal custom, input.to(CustomHTML)
  end
end