autowatchr

(Thanks to Adam Grant)
Used with Autowatchr helper gem, Watchr adds testing functionality to your project
ala Zentest/autotest without the cruft and (sometimes) confusing callback hooks
that can lead someone to stop testing and turn to drinking massive amounts of Tab Cola.

The script contains a set of simple rules that map observed files to an action. 
Its DSL is a single method: 

    watch(pattern, &action)

The Basic Idea:

    watch( 'a regexp pattern matching paths to observe' )  {|match_data_object| command_to_run }

For example:

  watch( 'test/test_.*\.rb' )  {|files| system("ruby #{files[0]}") }
  
will match any test file and run it whenever it is saved!

Demo files:

test/test.watchr:
================================================================================
require 'watchr'
require 'autowatchr'

Autowatchr.new(self) do |config|
	config.run_suite = true
	config.test_dir = 'test'
	config.require = %w(test_helper)
	config.test_re = '^%s.*/.*_test\.rb$' % config.test_dir	
end
================================================================================


Rakefile:
================================================================================
require(File.join(File.dirname(__FILE__), 'config', 'boot'))

require 'rake'
require 'rake/testtask'
require 'rake/rdoctask'

require 'tasks/rails'

desc "Starts running the test environment ala Zentest/autotest style!"
task :autotest do
  sh "watchr #{File.join(File.dirname(__FILE__), 'test', 'test.watchr')}"
end
================================================================================

To use, run this in your terminal from the RAILS_ROOT directory:

    rake autotest
    
And you're done!

Homepage:

    http://github.com/mynyml/watchr

Installation:
    
    gem install watchr
    gem install rev     (If on *nix system this is a big help!)