Background
When I joined my company, we discussed that I will get a 10% raise when my probation period will end. It's ending at the end of this month. I am supposed to get a 10% raised salary from next month without any further discussion about it.
My work performance is exceptional and I got a very lower offer when I joined my company so even after the raise it's not a good salary for my experience level. Back then I was in a hurry because of some personal problems and it was my first job so I accepted their offer without any/much negotiation.
I am about to quit too (will take 1-2 months depending upon luck). It's confirmed because of the poor working condition and I am not going to change my mind even after any raise.
Question
I want to invite a discussion and discuss my raise with them. Is it professional considering I may quit in next 30 days anyway and serve my notice period for 2-4 further weeks?
Reason why I want to do is:
Learn my self-worth: Knowing how much I am worth will help in negotiating for a new job.
Practice my negotiation skills
I also heard many companies ask for you current salary when offering a job and just add 10-20% to it. So I might be able to get an even higher salary thanks to the raise.
Only thing I am worried about is if it is considered professional or not?