Add spree_mail_settings to your Gemfile:
gem 'spree_mail_settings'
Bundle your dependencies and run the installation generator:
bundle
bundle exec rails g spree_mail_settings:install
Be sure to bundle your dependencies and then create a dummy test app for the specs to run against.
bundle
bundle exec rake test_app
bundle exec rspec spec
When testing your applications integration with this extension you may use it's factories. Simply add this require statement to your spec_helper:
require 'spree_mail_settings/factories'
Copyright (c) 2014 [name of extension creator], released under the New BSD License