Add: #95 リストへの新着投稿通知 (#192)

* Add: テーブル定義、内部処理

* Add: 通知の定期削除処理、自動削除、テスト

* Add: Web画面の表示、設定

* Fix test

spec/lib/vacuum/list_statuses_vacuum_spec.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Vacuum::ListStatusesVacuum do
+  subject { described_class.new }
+
+  describe '#perform' do
+    let!(:local_status_old) { Fabricate(:status, created_at: 2.days.ago) }
+    let!(:local_status_recent) { Fabricate(:status, created_at: 5.hours.ago) }
+    let!(:list_status_old) { Fabricate(:list_status, status: local_status_old, created_at: local_status_old.created_at) }
+    let!(:list_status_recent) { Fabricate(:list_status, status: local_status_recent, created_at: local_status_recent.created_at) }
+
+    before do
+      subject.perform
+    end
+
+    it 'deletes old list status' do
+      expect { list_status_old.reload }.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    it 'does not delete recent status' do
+      expect { list_status_recent.reload }.to_not raise_error
+    end
+
+    it 'statuses are remain' do
+      expect { local_status_old }.to_not raise_error
+    end
+  end
+end