Federate Remove when collection is deleted (#37741)

spec/services/delete_collection_service_spec.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe DeleteCollectionService do
+  subject { described_class.new }
+
+  let!(:collection) { Fabricate(:collection) }
+
+  describe '#call' do
+    it 'destroys the collection' do
+      expect { subject.call(collection) }.to change(Collection, :count).by(-1)
+    end
+
+    it 'federates a `Remove` activity', feature: :collections_federation do
+      subject.call(collection)
+
+      expect(ActivityPub::AccountRawDistributionWorker).to have_enqueued_sidekiq_job
+    end
+  end
+end