J_K9, when I meant testing it on your local machine, I really meant it like that too! Doesn't matter if your ISP disconnects you for 30 minutes or maybe even for a whole day. You just install the server software locally and access your own computer locally! You don't even need any Internet connection! It's done all on your local system. At least, that's how I test my own webpages. Try it on your local system by browsing to http://localhost or http://127.0.0.1 or http://YourMachineName or whatever.
If you have two computers and they are connected with a network, you can even install the webhost on one computer and browse to it from the other. You could, for example, an old second-hand computer with not much memory and diskspace, install FreeBSD or Linux on it with Apache and use that one as host for your tests. It only has to be connected to your other system that you'll use to brose to ut.

The biggest advantage? This saves a lot of time uploading all your stuff to this webhost...

Besides, if you want to have a live test with others accessing your site, it shouldn't matter much if it's down even half the time... It's a test, remember?