Guardfile

guard 'rspec', cmd: 'bundle exec rspec', all_after_pass: true, all_on_start: false do
  watch('spec/spec_helper.rb')                        { 'spec' }
  watch('config/routes.rb')                           { 'spec/controllers' }
  watch(%r{^spec/(.+)_spec\.rb$})                     { |m| "spec/#{m[1]}_spec.rb" }
  watch(%r{^app/(.+)_decorator\.rb$})                 { |m| "spec/#{m[1]}_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$})                           { |m| "spec/#{m[1]}_spec.rb" }
  watch(%r{^app/controllers/(.+)_(controller)\.rb$})  { |m| "spec/#{m[2]}s/#{m[1]}_#{m[2]}_spec.rb" }
end