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SpringでRSpecを高速化する

RSpec

Last updated at 2015-09-16Posted at 2015-09-16

1. Gemfileに`spring-commands-rspec`を追加する

gem 'spring-commands-rspec'

2. `bin/rspec`を作成する

spring-commands-rspecの場合

$ bundle exec spring binstub rspec

bin/rspec

#!/usr/bin/env ruby
begin
  load File.expand_path("../spring", __FILE__)
rescue LoadError
end
require 'bundler/setup'
load Gem.bin_path('rspec-core', 'rspec')

注意：すでにbundleのbinstubsを使ってbin/rspecがある場合は、一度削除する

$ bundle binstubs rspec-core

binstubsで生成したbin/rspec

#!/usr/bin/env ruby
#
# This file was generated by Bundler.
#
# The application 'rspec' is installed as part of a gem, and
# this file is here to facilitate running it.
#

require 'pathname'
ENV['BUNDLE_GEMFILE'] ||= File.expand_path("../../Gemfile",
  Pathname.new(__FILE__).realpath)

require 'rubygems'
require 'bundler/setup'

load Gem.bin_path('rspec-core', 'rspec')

このbin/rspecはspringが使われない

3. 測定

Springなし

実行

$ bundle exec spring status
Spring is not running.

出力結果

bundle exec rspec  3.83s user 0.94s system 97% cpu 4.887 total

Springあり

実行

$ time bundle exec bin/rspec