Rails 3 + rspec2 + mongoid + Factory_girl + autotest(growl)

.autotest

# Include plugins
require 'autotest/fsevent'
require 'autotest/growl'

# Skip some paths
Autotest.add_hook :initialize do |autotest|
  %w{.git .DS_Store ._* vendor}.each { |exception| autotest.add_exception(exception) }
  false
end

_setup

#
# Rails 3 + rspec2 + mongoid + Factory_girl + autotest(growl)
#
# thanks to
# http://ukstudio.jp/2010/09/03/rspec2_rails3_autotes/
# http://d.hatena.ne.jp/tkrd/20100814/1281752294
# http://blog.madoro.org/mn/74
# http://blog.madoro.org/mn/76
# http://wiki.github.com/rspec/rspec/autotest/
#

$ mkdir demo; cd demo
$ vi Gemfile
//use Gemfile
$ bundle install vendor/bundle
$ bundle exec rails new . -T --skip-activerecord
$ rails g mongoid:config
$ rails g rspec:install

$ vi config/application.rb
- require 'rails/all'
+ require "action_controller/railtie"
+ require "action_mailer/railtie"
+ require "active_resource/railtie"

  config.filter_parameters += [:password]

+ config.generators do |g|
+   g.orm :mongoid
+   g.test_framework  :rspec, :fixture => true
+   g.fixture_replacement :factory_girl, :dir => "spec/factories"
+ end  
+ config.mongoid.logger = Logger.new($stdout, :warn)

$ vi spec/spec_helper.rb
// use spec_helper.rb

$ vi ~/.autotest
// use .autotest

$ rails g model user

$ rake

$ autotest

Gemfile

source 'http://rubygems.org'

gem 'rails', '3.0.0'

gem 'mongoid', '2.0.0.beta.17'
gem 'bson_ext', '1.0.4'

gem 'rails3-generators'

group :development, :test do
  gem 'rspec','>=2.0.0.beta.20'
  gem 'rspec-rails','>=2.0.0.beta.20'
  gem 'ZenTest'
  gem 'autotest'
  gem 'autotest-rails'
  gem 'autotest-fsevent'
  gem 'autotest-growl'
  gem 'webrat'
  gem 'factory_girl_rails', :require => nil
end

spec_helper.rb

# This file is copied to spec/ when you run 'rails generate rspec:install'
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'mongoid'
require 'factory_girl'
Factory.find_definitions

# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

RSpec.configure do |config|
  # == Mock Framework
  #
  # If you prefer to use mocha, flexmock or RR, uncomment the appropriate line:
  #
  # config.mock_with :mocha
  # config.mock_with :flexmock
  # config.mock_with :rr
  config.mock_with :rspec

  config.before :all do
    Mongoid.master.collections.
      select { |c| c.name != 'system.indexes' }.each(&:drop)
  end
end