Faster Rails test runs...with Unix! http://www.jstorimer.com/blogs/workingwithcode/8136295-screencast-faster-rails-test-runs-with-unix

tclient

#!/usr/bin/env ruby

require 'socket'

test_file = ARGV[0]

socket = UNIXSocket.new('testing.sock')
socket.write(test_file)
socket.close_write

while r = socket.read(1)
  print r
end

# puts socket.read

tsever

#!/usr/bin/env ruby

ENV['RAILS_ENV'] = 'test'
require 'benchmark'
require 'socket'

rails_boot = Benchmark.measure { require './config/application' }
puts "Rails load: #{rails_boot}"

server = UNIXServer.new('testing.sock')

parent_process_id = Process.pid
at_exit {
  if Process.pid == parent_process_id
    File.unlink('testing.sock')
  end
}

trap('INT') { exit }

loop do
  client = server.accept
  test_file = client.read

  pid = fork do
    $stdout.reopen(client)
    $LOAD_PATH.unshift('./spec')
    require './' + test_file
  end

  Process.wait(pid)
  client.close
end