by Adam Scott http://adams.co.tt/
A mock SMTP server loosely based on mailtrap and greenmail, and can be used for automated testing. Like mailtrap, mailcrate listens on a chosen port and talks just enough SMTP protocol for ActionMailer to successfully deliver a message. However, like greenmail, it is started, stopped and interogated from your test code.
gem install mailcrateThe constructor requires a single parameter, the port which it should listen on.
require 'mailcrate'
mailcrate = Mailcrate.new(2525)
mailcrate.start
Mailer.send_mail(:to => 'to@example.com', :from => 'from@example.com', :body => 'An important message.')
mailcrate.mails[0][:from].should == 'from@example.com'
mailcrate.mails[0][:to_list].should include 'to@example.com'
mailcrate.mails[0][:body].should == 'An important message.'
mailcrate.stop