Silence ActionMailer warnings when using deliver_* class methods

gistfile1.rb

# The ActionMailer interface in Rails >= 3 sucks.  Besides when
# testing the mailer, I see no reason to instantiate an object and
# then deliver it.  Extend your mailer with this module to silence the
# warnings and enjoy life once again.

module SilenceDeliverWarnings
  def method_missing(method, *args)
    if method.to_s =~ /^deliver_(.*)/
      send($1, *args).deliver
    else
      super
    end
  end
end

class Mailer < ActionMailer::Base
  extend SilenceDeliverWarnings
end