Bots?

I just played a game of draft 5v5 normals... but there was a twist. When we entered the game it said they were bots and RIot was testing us and we'd get some icon or something. after we got rekt, the bots disappeared in the post game screen and the real players came back... but it felt like bots and there was the bold orange yellow text saying it was

ALSO the other team, real players, at endgame screen, said they played against bots too...

i hope it was a real bots game and it was actually a test and not a prank

but seriously they were advanced bots