gistfile1.rb

require 'tempfile'

class WriteAndReadRunner
  class FileNotFoundError < StandardError; end

  def initialize(count = 200)
    @all_files = []
    @count = count
  end

  def run
    @count.times.each do |count_index|
      @all_files << write_new_file
      if !find_file?(@all_files.last.path)
        raise FileNotFoundError, "File #{@all_files.last} not found at count_index: #{count_index}"
      end
    end
    cleanup_files
    puts "Completed #{@count} run(s) without error"
  end

  private

  def cleanup_files
    @all_files.each_with_index do |file, file_index|
      begin
        file.unlink
      rescue Errno::ENOENT
        puts "Error deleting file index #{file_index}"
        raise
      end
    end
  end

  def write_new_file
    file = Tempfile.new(['meta', '.in-progress'])
    IO.write(file.path, 'foo')
    file.close
    file
  end

  def find_file?(path)
    File.file?(path)
  end
end

if $0 == __FILE__
  count = ARGV[0].to_i
  WriteAndReadRunner.new(count).run
end