gistfile1.txt

class User < ActiveRecord::Base
  # Omitted
  def send_devise_notification(notification, *args)
    devise_mailer.send(notification, self, *args).deliver_later
  end
end

test 'send_devise_notification queues into activejob' do
  @user.save
  assert_equal enqueued_jobs.size, 1 # Passes
  assert_equal Sidekiq::Extensions::DelayedMailer.jobs.size, 1 #Fails
end