Adds CoffeeScript support for jasmine gem (rake jasmine task), uses barista gem to compile CoffeScript files to JavaScript before running Jasmine tests.

jasmine_config.rb

# put this file in spec/javascripts/support directory

require 'barista'
require 'logger'

require File.join(Rails.root, 'config/initializers/barista_config')

Barista.configure do |c|
  c.env = 'test'
  c.logger = Logger.new(STDOUT)
  c.logger.level = Logger::INFO
  c.before_compilation do |path|
    relative_path = Pathname(path).relative_path_from(Rails.root)
    c.logger.info "[#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}] Barista: Compiling #{relative_path}"
  end
end
Barista.setup_defaults

module Jasmine
  def self.app(config)
    # coffeescript jasmine test spec file directory
    Barista::Framework.register 'jasmine', config.spec_dir
    
    # compiled coffeescript tests output directory
    Barista::Framework['jasmine'].instance_variable_set('@output_root', Pathname(config.spec_dir))

    Rack::Builder.app do
      use Rack::Head

      map('/run.html')         { run Jasmine::Redirect.new('/') }
      map('/__suite__')        { run Barista::Filter.new(Jasmine::FocusedSuite.new(config)) }

      map('/__JASMINE_ROOT__') { run Rack::File.new(Jasmine.root) }
      map(config.spec_path)    { run Rack::File.new(config.spec_dir) }
      map(config.root_path)    { run Rack::File.new(config.project_root) }

      map('/favicon.ico')      { run Rack::File.new(File.join(Rails.root, 'public')) }

      map('/') do
        run Rack::Cascade.new([
          Rack::URLMap.new('/' => Rack::File.new(config.src_dir)),
          Barista::Filter.new(Jasmine::RunAdapter.new(config))
        ])
      end
    end
  end
end


# Note - this is necessary for rspec2, which has removed the backtrace
module Jasmine
  class SpecBuilder
    def declare_spec(parent, spec)
      me = self
      example_name = spec["name"]
      @spec_ids << spec["id"]
      backtrace = @example_locations[parent.description + " " + example_name]
      parent.it example_name, {} do
        me.report_spec(spec["id"])
      end
    end
  end
end