Take the hdd out of the enclosure. You'll most likely need a philips head screwdriver. It's not dangerous or difficult. If you have a friend with an external hdd, you can swap your hdd into their case quickly to test it. Or you can install it in any PC with a spare sata power cord and sata data cable
edit: ah no tools. Again I'd say check with your friends then, nearly everyone has a screwdriver or two in their garage
edit: ah no tools. Again I'd say check with your friends then, nearly everyone has a screwdriver or two in their garage