class RSpec::Core::Ordering::Random

Orders items randomly.
@private

def initialize(configuration) 

def initialize(configuration)
  @configuration = configuration
  @used = false
end

def jenkins_hash_digest(string)

to load another part of stdlib, which we try to minimize.
implemented in C) but has the advantage of not requiring us
It's a bit slower than MD5 (primarily because `Digest::MD5` is
Jenkins provides a good distribution and is simpler than MD5.
http://en.wikipedia.org/wiki/Jenkins_hash_function 
def jenkins_hash_digest(string)
  hash = 0
  string.each_byte do |byte|
    hash += byte
    hash &= MAX_32_BIT
    hash += ((hash << 10) & MAX_32_BIT)
    hash &= MAX_32_BIT
    hash ^= hash >> 6
  end
  hash += ((hash << 3) & MAX_32_BIT)
  hash &= MAX_32_BIT
  hash ^= hash >> 11
  hash += ((hash << 15) & MAX_32_BIT)
  hash &= MAX_32_BIT
  hash
end

def order(items) 

def order(items)
  @used = true
  seed = @configuration.seed.to_s
  items.sort_by { |item| jenkins_hash_digest(seed + item.id) }
end

def used? 

def used?
  @used
end