アイヌ語追加 (#428) (#433)

Reviewed-on: #433
Co-authored-by: miteruzo <miteruzo@naver.com>

backend/spec/support/auth_helper.rb

@@ -1,4 +1,16 @@
 module AuthHelper
+  def cookie_headers(user)
+    env = Rails.application.env_config.merge(Rack::MockRequest.env_for('/'))
+    endpoint = lambda do |request_env|
+      ActionDispatch::Request.new(request_env).session[:inheritance_code] = user.inheritance_code
+      [200, {}, []]
+    end
+    store = ActionDispatch::Session::CookieStore.new(
+        endpoint, Rails.application.config.session_options)
+    headers = ActionDispatch::Cookies.new(store).call(env)[1]
+    { 'Cookie' => Array(headers['set-cookie']).map { _1.split(';').first }.join('; ') }
+  end
+
   def sign_in_as(user)
     allow_any_instance_of(ApplicationController)
       .to receive(:current_user).and_return(user)