What

For stress testing, we need to use fake backends. for APNs we need one that mocks the TLS socket connection for Push/Feedback servers

Why

without the mock backend, it's impossible to test APNs connection code of UPS

How

Find a APNs fake backend, that is NOT based on the new HTTP/2 APIs, since we are still using the old TLS socket connection.

Perhaps there are some OpenSource solutions out there, or it's perhaps reasonable to take a look here: https://github.com/aerogear/aerogear-unifiedpush-server-integration-tests/tree/master/tools/proxy

Result

A fake APNs backend, that can be used for Push tests of iOS/APNs