follow Sinatra write extension document, I write a ./lib/sinatra/test_helper.rb
file containing my TestHelper, but using rackup
start I got this error:
/...PATH.../vendor/cache/ruby/1.9.1/gems/backports-3.1.1/lib/backports/tools.rb:328:in `require': cannot load such file -- sinatra/testhelper (LoadError)
Seems Bundler could find my custom helpers extension. How to declare it in my Gemfile?