This example has already been tested for build a TLS connection successfully?

[tigerBeh12]

As the title say.

[nsc]

Yes. As mentioned in the README, there is a server running on https://swifttls.org and you can connect to any server running TLS 1.2 or 1.3 using the command line tool:
swift run -c release tls client --connect server.example.org

[tigerBeh12]

You're really good. I have a general look at the code today, and it's too difficult for me to implement such a low-level detailed implementation. 5555555