Auto Test Lite Edition

auto_test.rb

#!/usr/bin/env ruby
require 'directory_watcher'

# Copyright (c) 2012, Mihail Szabolcs
# Released into the public domain. (http://unlicense.org/)

VERSION = "0.1"
HELP = <<-HELP
AutoTest Lite Edition v#{VERSION}

Usage:
  #{File.basename(__FILE__, File.extname(__FILE__))} file [test]
HELP

if ARGV.size < 1
  puts HELP
  exit
end

watch = true

command = "ruby -I. #{ARGV[0]}"
command+= " -n \"test_#{ARGV[1].gsub(' ', '_')}\"" if ARGV.size == 2

directory = File.expand_path(File.dirname(ARGV[0]))

puts "Watching directory '#{directory}' for changes ..."
puts "Running '#{command}' on every change ..."

dw = DirectoryWatcher.new directory, :glob => "*.rb", :pre_load => true, :interval => 1
dw.add_observer do |*args|
  args.each do |event|
    system(command)
  end
end

trap("INT") do
  puts "Bye, bye ..."
  watch = false
  dw.stop
end

dw.start

while watch
  sleep 1
end