Guardfile
guard :rspec, all_after_pass: true, all_on_start: true, cmd: 'bundle exec rspec' do
watch(%r{^spec/.+_spec\.rb$})
watch(%r{^lib/(.+)\.rb$}) { |m| "spec/#{m[1]}_spec.rb" }
watch(%r{^lib/(.+?)/.+\.rb$}) { |m| "spec/#{m[1]}_spec.rb" }
watch('spec/spec_helper.rb') { 'spec' }
watch(%r{^spec/support/.+\.rb$}) { 'spec' }
end