No test coverage for ipaddr in HTTP.start

We use a code like this:

request = Net::HTTP::Get.new(uri.request_uri)

Net::HTTP.start(uri.hostname, uri.port, ipaddr: ip, use_ssl: true) do |http|
  http.request(request)
end

What I have noticed is that it is difficult to see if ipaddr is actually used for the request... If there is a change in the future the ipaddr param may be just ignored and nobody will notice.

Furthermore I have noticed that in the code of this gem there is no test coverage for the ipaddr parameter passed to HTTP.start.

• Is there a more "solid" and "future-proof" solution to set the ipaddr in the above code?
• Can you add test coverage for this parameter so that it won't break in future versions?

Start at the HTTP.start entry point and trace how its ipaddr argument reaches the request connection. Add test coverage demonstrating that the supplied ipaddr is used, then run the relevant HTTP.start tests and confirm the behavior remains covered in future changes.