deliver_later for controller actions.

test/controllers/admin/auth_controller_test.rb

@@ -3,6 +3,8 @@ require 'test_helper'
 
 module Admin
   class AuthControllerTest < ActionDispatch::IntegrationTest
+    include ActiveJob::TestHelper
+
     test "should get login" do
       get admin_login_url
       assert_response :success
@@ -45,7 +47,7 @@ module Admin
 
     test "should process a reset request" do
       user = users(:admin)
-      assert_difference("ActionMailer::Base.deliveries.size", 1) do
+      assert_enqueued_jobs 1 do
         post admin_send_reset_url, params: { auth: { email: user.email } }
       end
       refute_equal user.reset_token, User.find(user.id).reset_token