Hi Techia,
I've been through this process before. They don't have to actually fix anything before you move in, the apartment just needs to be "liveable". For example, if one bathroom isn't working but the other bathroom is, you can still move in as you will have running water and a toilet, therefore it is "liveable".
I know this from personal experience with our friends (who were our next-door neighbours). They had the bathroom issue, plus many more in the house (walls weren't properly patched up and were wavy, some fixtures weren't working, etc). They were still told to move in, and people came over to fix stuff during the day.
My tips would be:
1- read your contract so you know what their responsabilities are and what they haven't actually claimed to do.
2- Make sure you test out everything- see how the doors close/lock/slide and how all the handles work, if the windows open/close properly, make sure all water fixutres work properly (shower/tub, toilets, sinks), check out your appliances to make sure they're in working condition. Look at all the walls to make sure that nails haven't started popping out already (you can see little round circles on the wall), make sure the outlets work, etc. Basically, go in with a critical eye, and jot down anything you see wrong. Most of the things they'll have to fix.
Let me know if you have any more questions