I have been blessed with a tanning bed that runs on 220 plug, which I do not have in my home. Before I pay someone to put a 220 outlet into my home, I wanted to know if there is any way I can test the tanning bed first to see if it works first?
One option, if you truly don't have any 220v outlets in your home, is to take it to a local RV park/campground.
Most campgrounds have multiple outlet types and are easily accessed by a truck so I think this could be a great way to test an electric appliance before moving it into your home. You'll need a site with a 50 amp hookup. I'd try public campgrounds before private ones.
You can't fully test it without plugging it in. If you have an electric stove or an electric dryer, you may be able to plug in to test it there. Otherwise, the electrician may be able and willing to temporarily tie it in at the box so you can make sure it works. You may find a generator with the same plug, too.
However you go about it, you need to have power to it to test it.