Sporkを使ってRuby on Rails プロジェクトのテストを高速化する

メモ。
参考 : Rails Tutorial

group :development, :test do
  .
  gem 'spork-rails', '4.0.0'
  gem 'guard-spork', '1.5.0'
  gem 'childprocess', '0.4.0'
end

インストール実行

$ bundle install

Sporkの設定にBootstrapを指定

$ bundle exec spork --bootstrap

spec/spec_helper.rb を編集

require 'rubygems'
require 'spork'

Spork.prefork do
  ENV["RAILS_ENV"] ||= 'test'
  require File.expand_path("../../config/environment", __FILE__)
  require 'rspec/rails'
  require 'rspec/autorun'

  # Requires supporting ruby files with custom matchers and macros, etc,
  # in spec/support/ and its subdirectories.
  Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

  # Checks for pending migrations before tests are run.
  # If you are not using ActiveRecord, you can remove this line.
  ActiveRecord::Migration.check_pending! if defined?(ActiveRecord::Migration)

  RSpec.configure do |config|
    # == Mock Framework
    #
    # If you prefer to use mocha, flexmock or RR, 
    # uncomment the appropriate line:
    #
    # config.mock_with :mocha
    # config.mock_with :flexmock
    # config.mock_with :rr

    # Remove this line if you're not using ActiveRecord
    # or ActiveRecord fixtures
    config.fixture_path = "#{::Rails.root}/spec/fixtures"

    # If you're not using ActiveRecord, or you'd prefer not to run each of 
    # your examples within a transaction, remove the following line or
    # assign false instead of true.
    config.use_transactional_fixtures = true

    # If true, the base class of anonymous controllers will be inferred
    # automatically. This will be the default behavior in future versions of
    # rspec-rails.
    config.infer_base_class_for_anonymous_controllers = false

    # Run specs in random order to surface order dependencies. If you 
    # find an order dependency and want to debug it, you can fix the
    # order by providing the seed, which is printed after each run.
    #     --seed 1234
    config.order = "random"
    config.include Capybara::DSL
  end
end

Spork.each_run do
  # This code will be run each time you run your specs.

end

sporkを起動

$ bundle exec spork