Mmm, I don't use autotest, nowadays seems that Guard is best fit, so:
# Add to Gemfile
group :development do
gem 'terminal-notifier-guard' # or libnotify for linux
gem 'rb-fsevent', require: false # or rb-inotify for linux
gem 'guard-minitest'
gem 'minitest'
end
# From bash
$ bundle update
$ guard init minitest # or bundle exec guard init minitest
# Edit the GuardFile, mine looks like:
guard 'minitest' do
# with Minitest::Unit
watch(%r|^test/(.*)\/?test_(.*)\.rb|)
watch(%r|^app/models/(.*)\.rb|) { |m| "test/test_#{m[1]}.rb" }
watch(%r|^lib/(.*)([^/]+)\.rb|) { |m| "test/test_#{m[2]}.rb" }
watch(%r|^test/helper\.rb|) { 'test' }
end
# Here my test helper.rb. /test/helper.rb
ENV['PADRINO_ENV'] ||= 'test'
require_relative '../config/boot'
require 'minitest/autorun'
# Have fun!
$ bundle exec guard