RepecでControllerのテストを実行した際に発生。 以下エラー文 Devise::MissingWarden: Devise could not find the `Warden::Proxy` instance on your request environment. Make sure that your application is loading Devise and Warden as expected and that the `Warden::Manager` middleware is present in your middleware stack. 原因 Device gem によるプロキシエラー。 対応 f you're using RSpec, you can put the following inside a file named spec/suppo