test_listen_ignore.rb

require 'rubygems'
require 'listen'
require 'fileutils'

FileUtils.rm_rf("./output")
FileUtils.mkdir_p("output")
listener = Listen.to('.').filter(/\.js$/).ignore('output').change do |*args|
  puts "Called back with: #{args.inspect}"
  exit!
end
Thread.new { listener.start }
sleep(0.5)
File.open('output/output.js', 'w') {|f| f.puts "Hello, world!" }
sleep