jobs: migrate pool category updates to ActiveJob.

app/jobs/update_pool_pseudo_tags_job.rb

@@ -0,0 +1,8 @@
+class UpdatePoolPseudoTagsJob < ApplicationJob
+  queue_as :default
+  queue_with_priority 20
+
+  def perform(pool)
+    pool.update_category_pseudo_tags_for_posts
+  end
+end

app/models/pool.rb

@@ -291,7 +291,7 @@ class Pool < ApplicationRecord
 
   def update_category_pseudo_tags_for_posts_async
     if saved_change_to_category?
-      delay(:queue => "default").update_category_pseudo_tags_for_posts
+      UpdatePoolPseudoTagsJob.perform_later(self)
     end
   end
 

test/unit/pool_test.rb

@@ -267,8 +267,10 @@ class PoolTest < ActiveSupport::TestCase
       end
 
       should "allow Builders to change the category of large pools" do
-        @builder = FactoryBot.create(:builder_user)
-        as(@builder) { @pool.update(category: "collection") }
+        perform_enqueued_jobs do
+          @builder = create(:builder_user)
+          as(@builder) { @pool.update(category: "collection") }
+        end
 
         assert_equal(true, @pool.valid?)
         assert_equal("collection", @pool.category)