Improve spec coverage for collection of workers/ classes (#27874)

spec/workers/publish_announcement_reaction_worker_spec.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe PublishAnnouncementReactionWorker do
+  let(:worker) { described_class.new }
+
+  describe '#perform' do
+    before { Fabricate(:account, user: Fabricate(:user, current_sign_in_at: 1.hour.ago)) }
+
+    let(:announcement) { Fabricate(:announcement) }
+    let(:name) { 'name value' }
+
+    it 'sends the announcement and name to the service when subscribed' do
+      allow(redis).to receive(:exists?).and_return(true)
+      allow(redis).to receive(:publish)
+
+      worker.perform(announcement.id, name)
+
+      expect(redis).to have_received(:publish)
+    end
+
+    it 'does not send the announcement and name to the service when not subscribed' do
+      allow(redis).to receive(:exists?).and_return(false)
+      allow(redis).to receive(:publish)
+
+      worker.perform(announcement.id, name)
+
+      expect(redis).to_not have_received(:publish)
+    end
+
+    it 'returns true for non-existent record' do
+      result = worker.perform(123_123_123, name)
+
+      expect(result).to be(true)
+    end
+  end
+end