guard 'minitest', test_folders: 'spec' do
  # with Minitest::Spec
  
  watch(%r|^spec/unit/(.*)_spec\.rb|)
  watch(%r|^(.*)\.rb|)   { |m| "spec/unit/#{m[1]}_spec.rb" }

  # with Minitest::Unit
  # watch(%r|^test/(.*)\/?test_(.*)\.rb|)
  # watch(%r|^lib/(.*)([^/]+)\.rb|)     { |m| "test/#{m[1]}test_#{m[2]}.rb" }
  # watch(%r|^test/test_helper\.rb|)    { "test" }

  # Rails 3.2
  # watch(%r|^app/controllers/(.*)\.rb|) { |m| "test/controllers/#{m[1]}_test.rb" }
  # watch(%r|^app/helpers/(.*)\.rb|)     { |m| "test/helpers/#{m[1]}_test.rb" }
  # watch(%r|^app/models/(.*)\.rb|)      { |m| "test/unit/#{m[1]}_test.rb" }
  
  # Rails
  # watch(%r|^app/controllers/(.*)\.rb|) { |m| "test/functional/#{m[1]}_test.rb" }
  # watch(%r|^app/helpers/(.*)\.rb|)     { |m| "test/helpers/#{m[1]}_test.rb" }
  # watch(%r|^app/models/(.*)\.rb|)      { |m| "test/unit/#{m[1]}_test.rb" }
end