Run specs in random order

shuffle_spec.rb

#!/usr/bin/env ruby

if size_opt = ARGV.index('-s')
  seed = ARGV[size_opt+1]
end

seed ||= Time.now.to_i

if clip_opt = ARGV.index('-c')
  begin
    require 'rubygems'
    require 'clipboard'
    Clipboard.copy(seed)
  rescue LoadError => e
    warn "Could not load 'clipboard' gem which is necessary for '-c'"
  end
end

puts "Using seed #{seed}"

srand(seed)

files = Dir['spec/**/*_spec.rb'].sort_by {rand}

system 'rspec', *files

exit $?

Use -s to specify a particular seed value, and -c to automatically copy the seed of the following run to the clipboard.