Enhances ActionMailer to support the :cache delivery method, which behaves like :test, except that the deliveries are marshalled to a temporary cache file, thus making them available to other processes.
You'll want to use this gem if you're testing with Selenium (or any other tool which distinct processes). Another approach would be to share deliveries between threads (in this case, this gem is not needed at all).
Add to Gemfile
gem 'action_mailer_cache_delivery'Now run bundle install
Change delivery method in your config/environments/test.rb
config.action_mailer.delivery_method = :cacheYou can optionally specify location for cache file.
config.action_mailer.cache_settings = { :location => "#{Rails.root}/tmp/mail.cache" }To access the cached deliveries in another process, just do
ActionMailer::Base.cached_deliveriesIf you use parallel_tests to run your tests in parallel, you may get unexpected errors like EOFError. If so, make sure cache files differ for processes. Change you config/environment/test.rb
config.action_mailer.cache_settings = { :location => "#{Rails.root}/tmp/cache/action_mailer_cache_delivery#{ENV['TEST_ENV_NUMBER']}.cache" }I tried to list there everyone who forked original version on GitHub. If you're not here, just send pull request.