Guardfile

# 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 features) \
#  .select{|d| Dir.exist?(d) ? d : UI.warning("Directory #{d} does not exist")}

## Note: if you are using the `directories` clause above and you are not
## watching the project directory ('.'), then 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"
require "active_support/inflector"

guard :minitest, all_on_start: false do
  watch(%r{^test/(.*)/?(.*)_test\.rb$}) 
  watch('test/test_helper.rb') { 'test' } 
  watch('config/routes.rb') { interface_tests }
  watch(%r{app/views/layouts/*}) { interface_tests } 
  watch(%r{^app/models/(.*?)\.rb$}) do |matches|
    ["test/models/#{matches[1]}_test.rb", "test/integration/microposts_interface_test.rb"]
    end
    watch(%r{^test/fixtures/(.*?)\.yml$}) do |matches|
    "test/models/#{matches[1].singularize}_test.rb" end
    watch(%r{^app/mailers/(.*?)\.rb$}) do |matches| "test/mailers/#{matches[1]}_test.rb"
    end
    watch(%r{^app/views/(.*)_mailer/.*$}) do |matches|
    "test/mailers/#{matches[1]}_mailer_test.rb" end
    watch(%r{^app/controllers/(.*?)_controller\.rb$}) do |matches| resource_tests(matches[1])
    end
    watch(%r{^app/views/([^/]*?)/.*\.html\.erb$}) do |matches|
    ["test/controllers/#{matches[1]}_controller_test.rb"] +
        integration_tests(matches[1])
      end
    watch(%r{^app/helpers/(.*?)_helper\.rb$}) do |matches| integration_tests(matches[1])
    end 
    watch('app/views/layouts/application.html.erb') do
    'test/integration/site_layout_test.rb'
    end 
    watch('app/helpers/sessions_helper.rb') do
    integration_tests << 'test/helpers/sessions_helper_test.rb' end
    watch('app/controllers/sessions_controller.rb') do ['test/controllers/sessions_controller_test.rb',
    'test/integration/users_login_test.rb'] end
    watch('app/controllers/account_activations_controller.rb') do 'test/integration/users_signup_test.rb'
      end
      watch(%r{app/views/users/*}) do
        resource_tests('users') +
    ['test/integration/microposts_interface_test.rb'] end
    watch('app/controllers/relationships_controller.rb') do ['test/controllers/relationships_controller_test.rb',
    'test/integration/following_test.rb'] end
    end
    # Returns the integration tests corresponding to the given resource.
    def integration_tests(resource = :all)
      if resource == :all
        Dir["test/integration/*"]
      else
        Dir["test/integration/#{resource}_*.rb"] end
        end
        # Returns all tests that hit the interface.
        def interface_tests
        integration_tests << "test/controllers"
        end
        # Returns the controller tests corresponding to the given resource.
        def controller_test(resource) "test/controllers/#{resource}_controller_test.rb"
        end
        # Returns all tests for the given resource.
        def resource_tests(resource)
        integration_tests(resource) << controller_test(resource)
        end


  # with Minitest::Spec
  # watch(%r{^spec/(.*)_spec\.rb$})
  # watch(%r{^lib/(.+)\.rb$})         { |m| "spec/#{m[1]}_spec.rb" }
  # watch(%r{^spec/spec_helper\.rb$}) { 'spec' }

  # Rails 4
  # watch(%r{^app/(.+)\.rb$})                               { |m| "test/#{m[1]}_test.rb" }
  # watch(%r{^app/controllers/application_controller\.rb$}) { 'test/controllers' }
  # watch(%r{^app/controllers/(.+)_controller\.rb$})        { |m| "test/integration/#{m[1]}_test.rb" }
  # watch(%r{^app/views/(.+)_mailer/.+})                    { |m| "test/mailers/#{m[1]}_mailer_test.rb" }
  # watch(%r{^lib/(.+)\.rb$})                               { |m| "test/lib/#{m[1]}_test.rb" }
  # watch(%r{^test/.+_test\.rb$})
  # watch(%r{^test/test_helper\.rb$}) { 'test' }

  # Rails < 4
  # watch(%r{^app/controllers/(.*)\.rb$}) { |m| "test/functional/#{m[1]}_test.rb" }
  # watch(%r{^app/helpers/(.*)\.rb$})     { |m| "test/helpers/#{m[1]}_test.rb" }
  # watch(%r{^app/models/(.*)\.rb$})      { |m| "test/unit/#{m[1]}_test.rb" }