gistfile1.rb

# This is a cheap stab at demonstrating the behavior of
# Inotify::CREATE. That is, CREATE will trigger inotify events
# immediately upon file creation.

require 'inotify'
require 'fileutils'

# Method which fakes a slow write by sleeping for one second.
def slow_write(filename)
  File.open(filename, "w") do |f|
    sleep 1
    f.puts "data"
  end
end

describe Inotify do
  before do
    @inotify = Inotify.new
  end

  describe "CREATE" do
    it 'should notify immediately' do
      wd       = @inotify.add_watch("/tmp", Inotify::CREATE)
      filename = "/tmp/inotify-" + Time.now.to_i.to_s
      writer   = Thread.new do
        slow_write(filename)
      end

      @inotify.each_event do |e|
        if e.name == File.basename(filename)
          File.read(filename).strip.should_not == "data"
          break
        end
      end

      writer.join
      FileUtils.rm(filename)
    end
  end
end