Use spring gem to speed up dev testing

Gemfile

@@ -10,7 +10,8 @@ gem 'jquery-rails'
 gem 'turbolinks'
 gem 'jbuilder' #, '~> 2.0'
 gem 'sdoc',          group: :doc #, '~> 0.4.0'
-# gem 'spring',        group: :development
+gem 'spring',        group: :development
+gem 'spring-commands-rspec', group: :development
 gem 'devise'
 gem 'devise_invitable'
 gem 'haml-rails'

Gemfile.lock

@@ -379,6 +379,9 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.3)
+    spring (3.0.0)
+    spring-commands-rspec (1.0.4)
+      spring (>= 0.9.1)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
@@ -472,6 +475,8 @@ DEPENDENCIES
   selenium-webdriver
   simple_form
   simplecov
+  spring
+  spring-commands-rspec
   sprockets (~> 3.7)
   turbolinks
   uglifier

bin/rails

@@ -1,4 +1,9 @@
 #!/usr/bin/env ruby
+begin
+  load File.expand_path('../spring', __FILE__)
+rescue LoadError => e
+  raise unless e.message.include?('spring')
+end
 if ENV['RAILS_ENV'] == 'development'
   ENV['PORT'] = '9012'
 end

bin/rake

@@ -1,4 +1,9 @@
 #!/usr/bin/env ruby
+begin
+  load File.expand_path('../spring', __FILE__)
+rescue LoadError => e
+  raise unless e.message.include?('spring')
+end
 require_relative '../config/boot'
 require 'rake'
 Rake.application.run

bin/rspec

@@ -5,6 +5,11 @@
 # The application 'rspec' is installed as part of a gem, and
 # this file is here to facilitate running it.
 #
+begin
+  load File.expand_path('../spring', __FILE__)
+rescue LoadError => e
+  raise unless e.message.include?('spring')
+end
 
 require 'pathname'
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path("../../Gemfile",

bin/spring

@@ -1,16 +1,17 @@
 #!/usr/bin/env ruby
-#
-# This file was generated by Bundler.
-#
-# The application 'spring' 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)
+# This file loads Spring without using Bundler, in order to be fast.
+# It gets overwritten when you run the `spring binstub` command.
 
-require 'rubygems'
-require 'bundler/setup'
+unless defined?(Spring)
+  require 'rubygems'
+  require 'bundler'
 
-load Gem.bin_path('spring', 'spring')
+  lockfile = Bundler::LockfileParser.new(Bundler.default_lockfile.read)
+  spring = lockfile.specs.detect { |spec| spec.name == 'spring' }
+  if spring
+    Gem.use_paths Gem.dir, Bundler.bundle_path.to_s, *Gem.path
+    gem 'spring', spring.version
+    require 'spring/binstub'
+  end
+end

config/environments/test.rb

@@ -5,7 +5,7 @@ Rails.application.configure do
   # test suite. You never need to work with it otherwise. Remember that
   # your test database is "scratch space" for the test suite and is wiped
   # and recreated between test runs. Don't rely on the data there!
-  config.cache_classes = true
+  config.cache_classes = false
 
   # Do not eager load code on boot. This avoids loading your whole application
   # just for the purpose of running a single test. If you are using a tool that