devton

#config/initializers/interceptor.rb
require "#{Rails.root}/lib/development_mail_interceptor"
ActionMailer::Base.register_interceptor(DevelopmentMailInterceptor) if Rails.env.development?

#lib/development_mail_interceptor.rb
class DevelopmentMailInterceptor
  def self.delivering_email(message)
    message.subject = "[#{message.to}] #{message.subject}"
    message.to = `git config --global user.email`.strip
  end  

devton

class ResquedDeviseMailer < Devise::Mailer
  include Resque::Mailer

  private
  # Configure default email options
  def devise_mail(record, action)

    record = hack_record(record)

    @scope_name     = Devise::Mapping.find_scope!(record)

devton

  config.after(:each) do 
    puts "cleaning mongodb...."
    Mongoid.database.collections.each do |collection|
      unless collection.name =~ /^system\./
        collection.remove
      end
    end
    puts "finished cleaning mongodb."
  end