How would I study for this test?

For English, my "Final" is basically to decide whether or not a random piece of work is "Wildean" or not. What my 9th grade teacher is basically asking us to do, is to identify whether or not this random piece of work he's going to present to us is Wilde's or not. How would I tell? I mean, I'm pretty confident, but a little help might be nice. Thanks!