Specs for cleanup workers (#3235)

* Add spec files for feed and media cleanup workers

* Add coverage for feed and media cleanup schedulers

* Clean up feed and media cleanup workers

spec/workers/scheduler/feed_cleanup_scheduler_spec.rb

@@ -0,0 +1,19 @@
+require 'rails_helper'
+
+describe Scheduler::FeedCleanupScheduler do
+  subject { described_class.new }
+
+  let!(:active_user) { Fabricate(:user, current_sign_in_at: 2.days.ago) }
+  let!(:inactive_user) { Fabricate(:user, current_sign_in_at: 22.days.ago) }
+
+  it 'clears feeds of inactives' do
+    expect_any_instance_of(Redis).to receive(:del).with(feed_key_for(inactive_user))
+    expect_any_instance_of(Redis).not_to receive(:del).with(feed_key_for(active_user))
+
+    subject.perform
+  end
+
+  def feed_key_for(user)
+    FeedManager.instance.key(:home, user.account_id)
+  end
+end