Restful routing spec macor

routing_marcors.rb

module RoutingMacors
  CRUD = { index: :get, show: :get, new: :get, edit: :get, update: :put, create: :post, destroy: :delete }

  def have_restful_resource *resources
    faked_id = Time.now.to_i.to_s
    options = resources.extract_options!
    collection_name = resources.last.to_s.pluralize
    ancestors = resources[0..-2].collect{|ancestor|  [ancestor.to_s.pluralize, faked_id] }.join("/")

    actions = CRUD.keys
    actions.reject!{|a| [options[:except]].flatten.include?(a) } if options[:except].present?
    actions = actions & [options[:only]].flatten if options[:only].present?
    actions.uniq!

    paths = {
      index: "/#{ancestors}/#{collection_name}", 
      show: "/#{ancestors}/#{collection_name}/#{faked_id}", 
      new: "/#{ancestors}/#{collection_name}/new", 
      create: "/#{ancestors}/#{collection_name}", 
      edit: "/#{ancestors}/#{collection_name}/#{faked_id}/edit", 
      update: "/#{ancestors}/#{collection_name}/#{faked_id}", 
      destroy: "/#{ancestors}/#{collection_name}/#{faked_id}"
    }

    CRUD.keys.each do |action|
      controller_path = [options[:namespace], options[:scope], '/', collection_name].reject(&:blank?).join("/")
      controller_path.gsub!(/\/+/,'/')
      controller_path.gsub!(/\A\/+/,'')
      route_matcher = {controller: controller_path, action: action.to_s}
      resources[0..-2].each do |res|
        res_id = '%s_id' % res.to_s.singularize
        route_matcher.merge!( res_id => faked_id)
      end
      route_matcher.merge!(id: faked_id) if [:show, :edit, :update, :destroy].include?(action)
      verb, path = CRUD[action], [options[:scope], '/', paths[action]].join('/').gsub(/\/+/,'/')
      if actions.include?(action)
        # expectations for specified routings
        puts "\t\t#{verb.to_s.upcase} #{path}"
        expect(verb => path).to route_to(route_matcher)
      else
        # expect excepted routings NOT to be routable
        puts "\t\t!#{verb.to_s.upcase} #{path}"
        expect(verb => path).not_to route_to(route_matcher)
      end
    end
  end
end