CppUnitTest

I haev heard of it before but actually I don't know how to do with it.

Can you guide me most basic steps to do with it ?
Say something like,
step 1: open the gui
step 2: click some button
step 3: copy and paste the code into something
step 4: .........

I intend to learn about this before learning formalized words' use in Unit Test, as I don't know what it exactly is about. Even when I read their definitions, I still don't know how practically they are used in Unittest, I guess those are just for debates by professionals, but me have no intention to be professional because I need money and food to eat first before formalizing the words

Thank you for your time :wave: