probably you know, is a test tool of XPath. You can put XML, XPath and current node if you want.
I believe you have installed Ruby 2.x and bundler!
$ git clone https://github.com/youcune/xpath-tester.git
$ cd xpath-tester
$ bundle install --path vendor/bundle --without development test
$ bundle exec rails server -e production
or just visit http://xpath-tester.herokuapp.com/!