be home and dry 
to have completed something successfully.
I’ve just got one more report to write and I’ll be home and dry.
I’ve just got one more report to write and I’ll be home and dry.
dry run
an occasion when you practise doing something to make sure there will be no problems when you really do it.
We decided to do a dry run at the church the day before the wedding. We’d better have a couple of dummy runs before we do the real thing.
but:
run dry
to be all used completely
We have been told the Social Security trust fund will run dry in a few more years because so many people will be retiring
