ephemeral_response.rb

# place in features/support
require 'ephemeral_response'

EphemeralResponse.configure do |config|
  config.expiration = lambda { one_day * 30 }
  config.white_list = ['localhost', '127.0.0.1']
  config.register('api.twitter.com') do |request|
    if oauth_token_match = request['authorization'].match(/oauth_token=\"\d+-\w+"/)
      "#{request.uri.to_s}#{request.method}#{oauth_token_match[0]}"
    else
      "#{request.uri.to_s}#{request.method}#{request.body}"
    end
  end
end


Before do
  EphemeralResponse.activate
end

After do
  EphemeralResponse.deactivate
end

very cool!