Guardfile

guard :minitest, spring: true, all_on_start: false do

  watch(%r{^lib\/(.+).rb$}) do |matches|
		"test/lib/#{matches[1]}_test.rb"
	end
  watch(%r{^test/(.*)\/?(.*)_test\.rb$})
	watch('config/routes.rb') { integration_tests }
	watch(%r{^app/models/(.*?)\.rb$}) do |matches|
    "test/models/#{matches[1]}_test.rb"
  end
  watch(%r{^app/controllers/(.*?)_controller\.rb$}) do |matches|
    resource_tests(matches[1])
  end
  watch(%r{^app/views/([^/]*?)/.*\.html\.erb$}) do |matches|
    ["test/controllers/#{matches[1]}_controller_test.rb"] +
    integration_tests(matches[1])
  end
  watch(%r{^app/helpers/(.*?)_helper\.rb$}) do |matches|
    integration_tests(matches[1])
  end

end

def integration_tests(resource = :all)
	if resource == :all
		Dir['test/integration/*']
	else
		Dir["test/integrations/#{resource}_*.rb"]
	end
end

def controller_test(resource)
	"test/controllers/#{resource}_controller_test.rb"
end

def resource_tests(resource)
	integration_tests(resource) << controller_test(resource)
end