gistfile1.rb

require "cuba"

module Cuba::Routable
  def self.setup(app)
    app.define do
      self.class.routes.each do |route, app|
        on(route) { run(app) }
      end
    end
  end

  module ClassMethods
    def routes
      @routes ||= {}
    end

    def route(path, &block)
      routes[path] = Class.new(self, &block)
    end
  end
end

if __FILE__ == $0
  require "cuba/test"

  # app.rb or even config.ru
  Cuba.plugin Cuba::Routable

  # Possibly routes/users.rb
  Cuba.route("users") do
    define do
      on get do
        res.write("All of the users")
      end
    end
  end

  # Possibly routes/posts.rb
  Cuba.route("posts") do
    define do
      on get do
        res.write("All of the posts")
      end
    end
  end

  scope do
    test "routing" do
      get "/users"

      assert_equal last_response.body, "All of the users"

      get "/posts"

      assert_equal last_response.body, "All of the posts"
    end
  end

  class API < Cuba
    plugin Cuba::Routable

    def ok
      res.write("OK")
    end
  end

  API.route("users") do
    define do
      on root do
        ok
      end
    end
  end

  scope do
    def app
      API
    end

    test "subclasses the right class" do
      get "/users"

      assert_equal last_response.body, "OK"
    end
  end
end