Test-KitchenでShell-VerifierとDockerCli-Driverで高速にServerspecテストを回す ref: http://qiita.com/Marcy/items/8a85ae78a21787f57bca

.kitchen.yml

---
provisioner:
  name: chef_zero

platforms:
  - name: ubuntu-14.04

suites:
  - name: vagrant
    driver:
      name: vagrant
    run_list:
      - recipe[example::default]
      # デフォルトのbusserでServerspec実行
  - name: docker_cli
    driver:
      name: docker_cli
    transport:
      name: docker_cli
    run_list:
      - recipe[example::default]
    verifier:
      name: shell
      command: ./bin/rspec test/integration/docker_cli/serverspec/example_spec.rb
      # ローカルからshell-verifierでServerspec実行

default.rb

execute 'apt-get update -y' do
  user 'root'
end

package 'nginx'

DockerCli-Driver

$ time ./bin/kitchen converge docker-cli -l warn

real    1m27.959s
user    0m3.111s
sys     0m0.603s

example_spec.rb

require 'serverspec'

set :backend, :docker
set :docker_container, ENV['KITCHEN_CONTAINER_ID']

describe package('nginx') do
  it { should be_installed }
end

Gemfile

source "https://rubygems.org"

gem 'kitchen-verifier-shell'
gem 'kitchen-docker_cli'
gem 'kitchen-vagrant'
gem 'serverspec'
gem 'docker-api'

Vagrant-Driver

$ time ./bin/kitchen converge vagrant -l warn

real    2m46.553s
user    0m6.068s
sys     0m2.041s