Convert settings/preferences/notifications controller spec to system (#33322)

spec/system/settings/preferences/notifications_spec.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Settings preferences notifications page' do
+  let(:user) { Fabricate :user }
+
+  before { sign_in user }
+
+  it 'Views and updates user prefs' do
+    visit settings_preferences_notifications_path
+
+    expect(page)
+      .to have_private_cache_control
+
+    uncheck notifications_follow_field
+
+    expect { click_on submit_button }
+      .to change { user.reload.settings['notification_emails.follow'] }.to(false)
+    expect(page)
+      .to have_title(I18n.t('settings.notifications'))
+  end
+
+  def notifications_follow_field
+    I18n.t('simple_form.labels.notification_emails.follow')
+  end
+end