gistfile1.rb

# class TagsHelperTest < Test::Unit::TestCase
#   helper 'app/helpers/tags'
# 
#   def test_tag
#     assert_equal "<div></div>", helper.tag(:div)
#   end
# end

require 'haml/engine'

module TestingHelpers
  def self.included(base)
    class << base
      def helper(*path)
        path[-1] = "#{path[-1]}.rb"
        load root_path(*path)
      end
    end
  end

  def helper
    @helper ||= HelperContext.new
  end

  class HelperContext
    include Haml::Helpers

    def initialize
      init_haml_helpers
    end
  end
end

def helpers(&b)
  TestingHelpers::HelperContext.class_eval(&b)
  Sinatra::EventContext.class_eval(&b)
end

Test::Unit::TestCase.send(:include, TestingHelpers)