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