How to setup Autotest with Rspec v. 2..

Setup Autotest with Rspec v. 2 (For Ruby and Rails Projects)

Install the necessary gems:

$ gem install autotest
$ gem install autotest-growl
$ gem install autotest-fsevent

note: you may also need the "autotest-rails-pure" gem

Create ~/.autotest configuration file (include the following script):
 
# if you have any issues getting this to work (like Growl notifications not appearing),
# take a look at the README found here: http://github.com/svoop/autotest-growl
 
begin
  require 'autotest/growl'
rescue LoadError
  warn "Error loading autotest/growl. Run '[sudo] gem install autotest-growl' first."
end
 
begin
  require 'autotest/fsevent'
rescue LoadError
  warn "Error loading autotest/fsevent. It switches autotest from constantly polling your hard drive to using OS X's event notification system. Cool!"
  warn "Run '[sudo] gem install autotest-fsevent' first."
end
 
# configuration options
 # I find show_modified_files to be way too much clutter on my screen, so I default them to false
 Autotest::Growl::show_modified_files = false
 Autotest::Growl::hide_label = true

#Autotest::Growl::clear_terminal = false
#Autotest::Growl::sticky_failure_notifications = false
#Autotest::Growl::one_notification_per_run = true
 
# this is a workaround for growl notifications not popping up
Autotest::Growl::remote_notification = true
 
# ignore changes to these files
Autotest.add_hook :initialize do |at|
  %w{.git .svn .hg .DS_Store ._* log}.each {|exception|at.add_exception(exception)}
end

__END__

OPTIONAL:
Create a ~/.rspec configuration file:

personally, i like my .rspec file to look like this:
-c
--format doc

Configure a project to use Autotest (works for both Ruby and Rails projects):

$ cd project_dir
$ mkdir autotest
$ vim autotest/discovery.rb

add the following to discovery.rb:

Autotest.add_discovery { "rspec2" }

$ autotest

And that should work!

Note: if you are using a different testing engine than rspec version 2, you will want to use that in the discovery.rb file rather than "rspec2"