Convert admin/terms_of_service/* spec controller->system (#33975)

spec/system/admin/terms_of_service/previews_spec.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Admin TermsOfService Previews' do
+  let(:terms_of_service) { Fabricate(:terms_of_service, notification_sent_at: nil) }
+
+  before { sign_in(admin_user) }
+
+  describe 'Viewing TOS previews' do
+    it 'shows the TOS preview page' do
+      visit admin_terms_of_service_preview_path(terms_of_service)
+
+      expect(page)
+        .to have_title(I18n.t('admin.terms_of_service.preview.title'))
+    end
+  end
+end