Ruby convert IDN domain from Punycode to Unicode

Question

I\'m writing a Rails app that needs to convert an IDN domain name from Punycode into its Unicode equivalent. I tried installing the idn gem that has bindings to GNU LibIDN,

Answer 1

https://github.com/knu/ruby-domain_name seem to have exactly the same functionality:

irb(main):018:0> SimpleIDN::Punycode.encode('axa.test')
=> "axa.test-"

irb(main):017:0> DomainName::Punycode.encode('axa.test')
=> "axa.test-"