What are the right steps to bug test WordPress website converted from .ASP?

My website was previously in .ASP (links had .asp extension and there was no dashboard like in WordPress)
I paid developer for its conversion to WordPress CMS and now everything seems to be working, however, are there any steps to do like bug tests etc. before telling developer that all is okay? Thanks

I think the best way is to just test as much as possible; try as many features as you can to make sure it’s all working as expected. Surely if you discover some in the future anyway the developer won’t mind fixing them?