We knew of it as it was happening. We knew the systems and the vehicle were fine, and we knew that we had good voice communications.
They tested one side of thrusters and they'll look at when to test the other side.
It's enough so that you don't have to use up the oxygen supplies to feed the fuel cells.
It's like moving into a house with somebody else's stuff.
It's difficult, because things are stored away in a bag in a drawer behind a panel, and stuff might be stored in front of that panel, too.