def assert_worker_runs_methods(worker, *methods)
    worker_klass = "#{worker.to_s.camelize}Worker".constantize
    methods.each do |method|
      worker_klass.any_instance.stubs(method).returns(true)
      MiddleMan.expects(:worker).with(:"#{worker}_worker").returns(worker_klass.new)
    end
  end

  def deny_worker_runs_methods(worker, *methods)
    worker_klass = "#{worker.to_s.camelize}Worker".constantize
    methods.each do |method|
      worker_klass.any_instance.stubs(method).returns(true)
      MiddleMan.expects(:worker).with(:"#{worker}_worker").returns(worker_klass.new).never
    end
  end

  # Shoulda examples
  should "update cached csv registration after save" do
    assert_worker_runs_methods :form_updater, :async_update_cached_csv_registrations
    assert forms(:one).save
  end

  should "not update cached csv registration after update if event has no registrations" do
    Registration.delete_all
    deny_worker_runs_methods :form_updater, :async_update_cached_csv_registrations
    assert forms(:one).save
  end