So this the video linked below is by these 2 guys, aba and preach. I watch alot of their vids and I was re-watching this video about a time aba let someone sleep over. Now at 6.24 of the video is where my question rises.

He talks about 1. Keeping your word and 2. About how in relationships people (he primarily talks about women in relationships but then mentions men) will test your boundaries.

Now I'm a yound guy. No intention of marriage or relationships and I really don't care about sex. So this question isn't really from a romantic relationship but rather more general relationships like friendships, with your parents, with people you work. What exactly does he mean by testing my boundaries? Keep in mind I am a young guy, fuck all world experience, so the chances of someone having done this to me, like tried to check my boundaries (or shit-tests as their called in TRP) and I probably just didn't realise it. So what exactly would testing my boundaries be, be it a woman, a friend, a boss, a collegue, how could they test my boundaries and how can I respond appropriately?

Video link: https://youtu.be/DPM7tHWNfKA