Guardfile

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