Guard+Spork+GrowlでRspecを自動実行する設定

こちらを参考。
http://ruby.railstutorial.org/chapters/static-pages#fnref-3_2

このサイトは「これからRailsやります（たいです）！」っていうタイミングだったら全部読んだほうがいいと思うよ。チュートリアルだから読みながら実践力が身につくし英語の勉強にもなるし。これよりいいガイドってみたことない。

さてMac限定です。Windowsでもできるらしいけど。
Growlはインストールしておきましょう。あとExtraのところにあるGrowl-notifyも必要なので入れときましょう。

Gemfile

group :development, :test do
  gem 'guard-rspec', '1.2.1'
  gem 'guard-spork', '1.2.0'
  gem 'spork', '0.9.2'
end

group :test do
  gem 'rb-fsevent', '0.9.1', :require => false
  gem 'growl', '1.0.3'
end

うろおぼえだけどfseventがファイルの変更を検知するやつで、guardは検知ごとに何をするのかをハンドリングするやつで、growlは画面に結果を出すやつ。で、テストを実行するたびにrailsを起動してるとオーバーヘッドでさくさくテストできないのでsporkがキャッシュする的な感じだったと思う。

$ script/rails generate rspec:install
$ bundle exec guard init rspec
$ bundle exec spork --bootstrap
$ bundle exec guard init spork

Guardfile

guard 'rspec', :version => 2, :all_after_pass => false, :cli => '--drb' do

デフォルトの動きは、failしたテストをパスすると、全部のテストを実行しようとするけど:all_after_pass => falseを足しておくと、その挙動をキャンセルできる。前実行したい場合は、コマンドラインでバシっとエンター一発叩けばおっけーだったような。drbはsporkのことで、spork経由で実行しましょうね、的な感じ。

ここまでやると、spec/spec_helper.rb がこうなってるので５０行目あたりのENV["RAILS_ENV"] ||= 'test'から下をごそっとSpork.prefork doの中に移動。
spec/spec_helper.rb BEFORE

require 'rubygems'
require 'spork'
#uncomment the following line to use spork with the debugger
#require 'spork/ext/ruby-debug'

Spork.prefork do
  # Loading more in this block will cause your tests to run faster. However,
  # if you change any configuration or code from libraries loaded here, you'll
  # need to restart spork for it take effect.

end

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

end

# --- Instructions ---
# Sort the contents of this file into a Spork.prefork and a Spork.each_run
# block.
#
# The Spork.prefork block is run only once when the spork server is started.
# You typically want to place most of your (slow) initializer code in here, in
# particular, require'ing any 3rd-party gems that you don't normally modify
# during development.
#
# The Spork.each_run block is run each time you run your specs.  In case you
# need to load files that tend to change during development, require them here.
# With Rails, your application modules are loaded automatically, so sometimes
# this block can remain empty.
#
# Note: You can modify files loaded *from* the Spork.each_run block without
# restarting the spork server.  However, this file itself will not be reloaded,
# so if you change any of the code inside the each_run block, you still need to
# restart the server.  In general, if you have non-trivial code in this file,
# it's advisable to move it into a separate file so you can easily edit it
# without restarting spork.  (For example, with RSpec, you could move
# non-trivial code into a file spec/support/my_helper.rb, making sure that the
# spec/support/* files are require'd from inside the each_run block.)
#
# Any code that is left outside the two blocks will be run during preforking
# *and* during each_run -- that's probably not what you want.
#
# These instructions should self-destruct in 10 seconds.  If they don't, feel
# free to delete them.




# This file is copied to spec/ when you run 'rails generate rspec:install'
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}

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"
end

spec/spec_helper.rb AFTER

require 'rubygems'
require 'spork'
#uncomment the following line to use spork with the debugger
#require 'spork/ext/ruby-debug'

Spork.prefork do
  # Loading more in this block will cause your tests to run faster. However,
  # if you change any configuration or code from libraries loaded here, you'll
  # need to restart spork for it take effect.

  # This file is copied to spec/ when you run 'rails generate rspec:install'
  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}

  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"
  end

end

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

end

で最後にコマンドラインで

bundle exec guard start