class Spec::Story::Runner::ScenarioRunner

def Scenario(name, &block)
  # do nothing
end

def add_listener(listener)
  @listeners << listener
end

def initialize
  @listeners = []
end

def run(scenario, world)
  @listeners.each { |l| l.scenario_started(scenario.story.title, scenario.name) }
  run_story_ignoring_scenarios(scenario.story, world)
  
  world.start_collecting_errors
  unless scenario.body
    @listeners.each { |l| l.scenario_pending(scenario.story.title, scenario.name, '') }
    return true
  end
  
  world.instance_eval(&scenario.body)
  if world.errors.empty?
    @listeners.each { |l| l.scenario_succeeded(scenario.story.title, scenario.name) }
  else
    if Spec::Example::ExamplePendingError === (e = world.errors.first)
      @listeners.each { |l| l.scenario_pending(scenario.story.title, scenario.name, e.message) }
    else
      @listeners.each { |l| l.scenario_failed(scenario.story.title, scenario.name, e) }
      return false
    end
  end
  true
end

def run_story_ignoring_scenarios(story, world)
  class << world
    def Scenario(name, &block)
      # do nothing
    end
  end
  story.run_in(world)
  class << world
    remove_method(:Scenario)
  end
end