Spring to speed up tests
Guard to automate them – starts specific tests when detects file changes
Source: http://girders.org/blog/2014/02/06/setup-rails-41-spring-rspec-and-guard/
Extract:

group :development, :test do
  gem 'spring-commands-rspec'
  gem 'guard-rspec'
end

spring binstub --all
* bin/rake: spring already present
* bin/rspec: generated with spring
* bin/rails: spring already present

spring status 

spring stop 

To generate the guardfile:

guard init

Edit the line:

guard :rspec, cmd:"spring rspec" do

Run:

guard
11:48:02 - INFO - Guard is using TerminalTitle to send notifications.
11:48:02 - INFO - Guard::RSpec is running
11:48:02 - INFO - Guard is now watching at '/home/alfredo/projects/activity_logger'
[1] guard(main)>

If you need to change something basic in your app, such as adding a gem, updating a local dependency that could be cached, you need to restart both guard and spring

»»> Restart guard »»»> Ctrl-D at the console where guard is running

LiverReload gem: gem 'guard-livereload' Execute $ guard init livereload to add it to guardfile Notice the part for watching factories to eecute test on controllers, models and views. ActiveSupport/inflector is needed for 'singularize' function

# guarfile
require 'active_support/inflector'

# A sample Guardfile
# More info at https://github.com/guard/guard#readme

## Uncomment and set this to only include directories you want to watch
# directories %w(app lib config test spec feature)

## Uncomment to clear the screen before every task
# clearing :on

## Guard internally checks for changes in the Guardfile and exits.
## If you want Guard to automatically start up again, run guard in a
## shell loop, e.g.:
##
##  $ while bundle exec guard; do echo "Restarting Guard..."; done
##
## Note: if you are using the `directories` clause above and you are not
## watching the project directory ('.'), the you will want to move the Guardfile
## to a watched dir and symlink it back, e.g.
#
#  $ mkdir config
#  $ mv Guardfile config/
#  $ ln -s config/Guardfile .
#
# and, you'll have to watch "config/Guardfile" instead of "Guardfile"

# Note: The cmd option is now required due to the increasing number of ways
#       rspec may be run, below are examples of the most common uses.
#  * bundler: 'bundle exec rspec'
#  * bundler binstubs: 'bin/rspec'
#  * spring: 'bin/rspec' (This will use spring if running and you have
#                          installed the spring binstubs per the docs)
#  * zeus: 'zeus rspec' (requires the server to be started separately)
#  * 'just' rspec: 'rspec'


guard 'livereload' do
  watch(%r{app/views/.+\.(erb|haml|slim)$})
  watch(%r{app/helpers/.+\.rb})
  watch(%r{public/.+\.(css|js|html)})
  watch(%r{config/locales/.+\.yml})
  # Rails Assets Pipeline
  watch(%r{(app|vendor)(/assets/\w+/(.+\.(css|js|html|png|jpg))).*}) { |m| "/assets/#{m[3]}" }
end

guard :rspec, cmd: "spring rspec" do
  require "guard/rspec/dsl"
  dsl = Guard::RSpec::Dsl.new(self)
  
  # Feel free to open issues for suggestions and improvements

  # RSpec files
  rspec = dsl.rspec
  watch(rspec.spec_helper) { rspec.spec_dir }
  watch(rspec.spec_support) { rspec.spec_dir }
  watch(rspec.spec_files)

  # Ruby files
  ruby = dsl.ruby
  dsl.watch_spec_files_for(ruby.lib_files)

  # Rails files
  rails = dsl.rails(view_extensions: %w(erb haml slim))
  dsl.watch_spec_files_for(rails.app_files)
  dsl.watch_spec_files_for(rails.views)

  watch(rails.controllers) do |m|
    [
      rspec.spec.("routing/#{m[1]}_routing"),
      rspec.spec.("controllers/#{m[1]}_controller"),
      rspec.spec.("acceptance/#{m[1]}")
    ]
  end

  # Rails config changes
  watch(rails.spec_helper)     { rspec.spec_dir }
  watch(rails.routes)          { "#{rspec.spec_dir}/routing" }
  watch(rails.app_controller)  { "#{rspec.spec_dir}/controllers" }

  # Capybara features specs
  watch(rails.view_dirs)     { |m| rspec.spec.("features/#{m[1]}") }

  # Turnip features and steps
  watch(%r{^spec/acceptance/(.+)\.feature$})
  watch(%r{^spec/acceptance/steps/(.+)_steps\.rb$}) do |m|
    Dir[File.join("**/#{m[1]}.feature")][0] || "spec/acceptance"
  end

  # Factories
  watch(%r{spec/factories/(.+).rb$}) do |m|
    "spec/controllers/#{m[1]}_controller_spec.rb"
    "spec/models/#{m[1].singularize}_spec.rb"
    "spec/views/#{m[1]}"
  end

end