Move HtmlVariantSuccess.create delay calls to ActiveJob (#3173)

- add AJ job + job spec
  - refactor call

app/controllers/html_variant_successes_controller.rb

@@ -1,6 +1,6 @@
 class HtmlVariantSuccessesController < ApplicationController
   def create
-    HtmlVariantSuccess.delay.create(html_variant_id: params[:html_variant_id], article_id: params[:article_id])
+    HtmlVariantSuccessCreateJob.perform_later(html_variant_id: params[:html_variant_id], article_id: params[:article_id])
     head :ok
   end
 end

app/jobs/html_variant_success_create_job.rb

@@ -0,0 +1,7 @@
+class HtmlVariantSuccessCreateJob < ApplicationJob
+  queue_as :html_variant_success_create
+
+  def perform(html_variant_id:, article_id:)
+    HtmlVariantSuccess.create(html_variant_id: html_variant_id, article_id: article_id)
+  end
+end

spec/jobs/html_variant_success_create_job_spec.rb

@@ -0,0 +1,6 @@
+require "rails_helper"
+require "jobs/shared_examples/enqueues_job"
+
+RSpec.describe HtmlVariantSuccessCreateJob, type: :job do
+  include_examples "#enqueues_job", "html_variant_success_create", [{ html_variant_id: 789, article_id: 456 }]
+end

spec/requests/html_variant_successes_spec.rb

@@ -7,7 +7,7 @@ RSpec.describe "HtmlVariantSuccesses", type: :request do
 
   describe "POST /html_variant_successes" do
     it "rejects non-permissioned user" do
-      run_background_jobs_immediately do
+      perform_enqueued_jobs do
         post "/html_variant_successes", params: {
           article_id: article.id,
           html_variant_id: html_variant.id