My coffeescript TDD super fast feedback loop

Readme.txt

Get the parts
* jasmine-node (https://github.com/mhevery/jasmine-node)
* watchr (https://github.com/mynyml/watchr)
* growlnotify (you can brew this)
* And of course coffeescript :)

You can see the demo here: http://holatdd.com/videos/kata-lonja (just advance the 5 first mins or so)

Create a project like this
├── spec
│   └── coffeescripts
│       └── simple_spec.coffee
└── watch.rb

2 directories, 2 files

The watch.rb file is described below...

watchr.rb

system('clear')

def growl(message)
  growlnotify = `which growlnotify`.chomp
  title = "the doom guy says"
  image = message.include?('0 failures') ? "~/.watchr_images/passed.png" : "~/.watchr_images/failed.png"
  options = "-w -n Watchr --image '#{File.expand_path(image)}' -m '#{message}' '#{title}'"
  system %(#{growlnotify} #{options} &)  
end

def run(cmd)
  puts(cmd)
  `#{cmd}`
end

def run_specs
  result = run 'jasmine-node --coffee spec'
  result.gsub!('[32m', '') # ... Successful tests
  result.gsub!('[31m', '') # FFF Failed tests
  result.gsub!('[0m', '')  # Closing colors from the terminal
  puts result
  growl result.split('\n').last rescue nil
end

watch('spec/coffeescripts/.*'){ |m| run_specs }