gistfile1.rb

module Interface
  def self.method_check(method_name, *expect_params)
    @interface_defines = {} unless @interface_defines
    @interface_defines[method_name] = *expect_params
  end

  def self.append_features(k)
    @interface_defines.each do |method_name, expect_params|
      if k.respond_to?(method_name)
        method = k.method(method_name)
        params = method.parameters
        # TODO params と expect_paramsが一致する処理
      else
        raise "No method error occured" 
      end
    end
  end

  method_check :helloworld
  method_check :echo, :text
end

class Hoge
  def self.helloworld
    p "helloworld"
  end

  def self.echo(text)
    p "text"
  end

  include Interface
end