Spec coverage for settings/preferences/* controllers (#24825)

app/controllers/settings/preferences/base_controller.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class Settings::Preferences::BaseController < Settings::BaseController
+  def show; end
+
+  def update
+    if current_user.update(user_params)
+      I18n.locale = current_user.locale
+      redirect_to after_update_redirect_path, notice: I18n.t('generic.changes_saved_msg')
+    else
+      render :show
+    end
+  end
+
+  private
+
+  def after_update_redirect_path
+    raise 'Override in controller'
+  end
+
+  def user_params
+    params.require(:user).permit(:locale, chosen_languages: [], settings_attributes: UserSettings.keys)
+  end
+end