Add basic coverage for VoteService class (mastodon#29334)

spec/services/vote_service_spec.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe VoteService do
+  describe '#call' do
+    subject { described_class.new.call(voter, poll, [0]) }
+
+    context 'with a poll and poll options' do
+      let(:poll) { Fabricate(:poll, account: account, options: %w(Fun UnFun)) }
+      let(:fun_vote) { Fabricate(:poll_vote, poll: poll) }
+      let(:not_fun_vote) { Fabricate(:poll_vote, poll: poll) }
+      let(:voter) { Fabricate(:account, domain: nil) }
+
+      context 'when the poll was created by a local account' do
+        let(:account) { Fabricate(:account, domain: nil) }
+
+        it 'stores the votes and distributes the poll' do
+          expect { subject }
+            .to change(PollVote, :count).by(1)
+
+          expect(ActivityPub::DistributePollUpdateWorker)
+            .to have_enqueued_sidekiq_job(poll.status.id)
+        end
+      end
+
+      context 'when the poll was created by a remote account' do
+        let(:account) { Fabricate(:account, domain: 'host.example') }
+
+        it 'stores the votes and processes delivery' do
+          expect { subject }
+            .to change(PollVote, :count).by(1)
+
+          expect(ActivityPub::DeliveryWorker)
+            .to have_enqueued_sidekiq_job(anything, voter.id, poll.account.inbox_url)
+        end
+      end
+    end
+  end
+end