Guardfile

guard 'rspec', cli: '--drb --format Fuubar --color', version: 2 do
  # run every updated spec file
  watch(%r{^spec/.+_spec\.rb$})
  # run the lib specs when a file in lib/ changes
  watch(%r{^lib/(.+)\.rb$}) { |m| "spec/lib/#{m[1]}_spec.rb" }
  # run the model specs related to the changed model
  watch(%r{^app/(.+)\.rb$}) { |m| "spec/#{m[1]}_spec.rb" }
  # run the view specs related to the changed view
  watch(%r{^app/(.*)(\.erb|\.haml|\.slim)$}) { |m| "spec/#{m[1]}#{m[2]}_spec.rb" }
  # run the integration specs related to the changed controller
  watch(%r{^app/controllers/(.+)\.rb}) { |m| "spec/requests/#{m[1]}_spec.rb" }  
  # run all integration tests when application controller change
  watch('app/controllers/application_controller.rb') { "spec/requests" }
end

# guard 'rspec' do
#   watch('spec/spec_helper.rb')                        { "spec" }
#   watch('config/routes.rb')                           { "spec/routing" }
#   watch('app/controllers/application_controller.rb')  { "spec/controllers" }
#   watch(%r{^spec/.+_spec\.rb$})
#   watch(%r{^app/(.+)\.rb$})                           { |m| "spec/#{m[1]}_spec.rb" }
#   watch(%r{^app/(.*)(\.erb|\.haml)$})                 { |m| "spec/#{m[1]}#{m[2]}_spec.rb" }
#   watch(%r{^lib/(.+)\.rb$})                           { |m| "spec/lib/#{m[1]}_spec.rb" }
#   watch(%r{^app/controllers/(.+)_(controller)\.rb$})  { |m| ["spec/routing/#{m[1]}_routing_spec.rb", "spec/#{m[2]}s/#{m[1]}_#{m[2]}_spec.rb", "spec/acceptance/#{m[1]}_spec.rb"] }
# end