Hello Ferruh,

>BUT overall how can we catch issues like this in the feature, we don't
>have a good way to test testpmd flow commands.
>@Ori, @Gregory, do you have any idea?
>cc'ed CI mail list too.

We have a tool for unit tests based on the testpmd.
The tool details are here:  https://drive.google.com/drive/folders/1cHrPwx4fUJ6ibUCtHd4kNKsrmmvQvvOj?usp=drive_link.
There's also a short description here: https://inbox.dpdk.org/ci/2a287ee7-cda4-f2ab-a4e6-a47021f8573f@nvidia.com/

Consider an option when a code patch is accompanied with a short test script that validates that patch functionality.
DPDK CI can run the script to verify that the patch functions correctly.

Regards,
Gregory