Settings controllers specs (#23915)

spec/controllers/settings/preferences/appearance_controller_spec.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe Settings::Preferences::AppearanceController do
+  render_views
+
+  let!(:user) { Fabricate(:user) }
+
+  before do
+    sign_in user, scope: :user
+  end
+
+  describe 'GET #show' do
+    it 'returns http success' do
+      get :show
+      expect(response).to have_http_status(200)
+    end
+  end
+end