title: Testing Sidekiq/ActiveJob - Job in ActiveJob but not Sidekiq
body: <p>I monkey patched my user class (backed by devise) to use ActiveJob like so:</p>
  
  <pre><code>class User &lt; ActiveRecord::Base
    # Omitted
  
    def send_devise_notification(notification, *args)
      devise_mailer.send(notification, self, *args).deliver_later
    end
  end
  </code></pre>
  
  <p>I tried testing this with the following test:</p>
  
  <pre><code>class UserTest &lt; ActiveSupport::TestCase
    include ActiveJob::TestHelper
  
    def setup
      @user = User.new(email: 'example@gmail.com', password: 'password',
                       password_confirmation: 'password')
    end
  
    test 'send_devise_notification queues into activejob' do
      @user.save
      assert_equal enqueued_jobs.size, 1 # This test passes
      assert_equal Sidekiq::Extensions::DelayedMailer.jobs.size, 1 # This test fails
    end
  </code></pre>
  
  <p>log/test.log looks like this:</p>
  
  <pre><code>------------------------------------------------------------------
  UserTest: test_0011_send_devise_notification queues into activejob
  ------------------------------------------------------------------
    [1m[35m (0.1ms)[0m  SAVEPOINT active_record_1
    [1m[36mUser Exists (0.4ms)[0m  [1mSELECT  1 AS one FROM "users" WHERE "users"."email" = 'example@gmail.com' LIMIT 1[0m
    [1m[35mUser Load (0.3ms)[0m  SELECT  "users".* FROM "users" WHERE "users"."confirmation_token" = $1  ORDER BY "users"."id" ASC LIMIT 1  [["confirmation_token", "62d1fac8e1319c29bfbe630aece15975963994b09746edbad65772e4598aa4d2"]]
    [1m[36mSQL (0.4ms)[0m  [1mINSERT INTO "users" ("email", "encrypted_password", "created_at", "updated_at", "confirmation_token", "confirmation_sent_at") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id"[0m  [["email", "example@gmail.com"], ["encrypted_password", "$2a$04$b6/WjVWCthq.bKG1KN8JPeb3w8jz8oVWTU53BpTn90wIlTQ5cC2KO"], ["created_at", "2015-01-30 06:19:03.531310"], ["updated_at", "2015-01-30 06:19:03.531310"], ["confirmation_token", "62d1fac8e1319c29bfbe630aece15975963994b09746edbad65772e4598aa4d2"], ["confirmation_sent_at", "2015-01-30 06:19:03.730092"]]
  [ActiveJob] Enqueued ActionMailer::DeliveryJob (Job ID: 9730d5a8-5dd4-4334-8290-e4e8e554715e) to Test(mailers) with arguments: "Devise::Mailer", "confirmation_instructions", "deliver_now", gid://swyp/User/232633312, "s7QVW_T2Aw8-ik6o1g2f", {}
    [1m[35m (0.2ms)[0m  RELEASE SAVEPOINT active_record_1
    [1m[36m (0.2ms)[0m  [1mROLLBACK[0m
    [1m[35m (0.1ms)[0m  BEGIN
  </code></pre>
  
  <p>enqueued_jobs inside of a debugger looks like this:</p>
  
  <pre><code>[{:job=&gt;ActionMailer::DeliveryJob,
  :args=&gt;["Devise::Mailer", "confirmation_instructions", "deliver_now", #&lt;User id: 232633312, email: "example@gmail.com", encrypted_password: "$2a$04$E05.gR8oXSHQyk8hUOTBZ.PvswvHy2YYtTNXaha.wj2...", reset_password_token: nil, reset_password_sent_at: nil, remember_created_at: nil, sign_in_count: 0, current_sign_in_at: nil, last_sign_in_at: nil, current_sign_in_ip: nil, last_sign_in_ip: nil, confirmation_token: "cba7134de82b6fde115fd3ca8e40975befeac299a1e619cdcb...", confirmed_at: nil, confirmation_sent_at: "2015-01-30 17:08:51", unconfirmed_email: nil, created_at: "2015-01-30 17:08:51", updated_at: "2015-01-30 17:08:51", first_name: nil, last_name: nil&gt;, "QBLzzPLKVLy3znSZESBc", {}], :queue=&gt;"mailers"}]
  </code></pre>
  
  <p>bin/rails c --environment test</p>
  
  <pre><code>irb(main):004:0&gt; Rails.application.config.active_job.queue_adapter
  =&gt; :sidekiq
  </code></pre>
  
  <p>My Procfile looks like this:</p>
  
  <pre><code>web: bin/rails s
  redis: redis-server
  worker: bundle exec sidekiq -q default -q mailers
  </code></pre>
  
  <p>Anyone have any ideas?</p>