Add a worker that simulates a long running Sidekiq job (#4428)

app/workers/simulate_long_job_worker.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class SimulateLongJobWorker
+  include Sidekiq::Worker
+
+  sidekiq_options queue: :dumpworker
+
+  def perform(duration_seconds)
+    sleep(duration_seconds)
+  end
+end

spec/workers/simulate_long_job_worker_spec.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe SimulateLongJobWorker do
+  describe '#perform' do
+    let(:worker_instance) { described_class.new }
+
+    it 'calls sleep with the specified duration' do
+      allow(worker_instance).to receive(:sleep).with(10)
+      worker_instance.perform(10)
+      expect(worker_instance).to have_received(:sleep).with(10)
+    end
+  end
+end