Cheating or mind games?

Is being on a dating site cheating? And is it playing mind games if he says it was a test?

I recently caught my partner on a dating site, he had made it the day prior and had already matched and liked other girls profiles, messaged a couple and on his profile it said he was looking for other woman to hook up with. I confronted him about it and he said it was a test and I was supposed to see it. Hasn’t apologised for it. Says it’s not cheating, avoiding the question as to why he was on it and turns it around and makes me the bad guy. Is that cheating and mind games and what should I do?

Damn it’s real in the field huh