module RSpec::Core::Backports::Random::Implementation

def seed_rand(new_seed = 0)
  new_seed = Backports.coerce_to_int(new_seed)
  @seed = nil unless defined?(@seed)
  old, @seed = @seed, new_seed.nonzero? || Random.new_seed
  @mt = MT19937[ @seed ]
  old
end