iMovie questions

Hi,

I'll start off by saying I am a huge mac newbie so please be gentle lol.

I want to know if my macbook pro runs out of space while imovie is recording will it finalise itself or will it wait until I finalise it myself?
It will be connected to power.

Also, what if the macbook isn't connected to power & imovie is recording will it finalise before the mac shuts down?

Thanks a lot :)