How to test new AWS IoT certificates after certificate rotation? (CA-281)

[tobyloki]

Hello. I am currently using AWS IoT Jobs to do certificate rotation. After receiving the new AWS certificate and private key pair, how can I test that the certificates work before restarting the application and saving the credentials?

[espressing]

Has there been any movement on this? I would join this topic as it is absolutely fundamental going to the ability to realise WHY a connection is not made. At the moment there are e.g. TLS status codes that could say that there is authentication failure, BUT these are either not actually implemented OR are folded into opaque overall fail/success...