Cheating on a test is just stupid. First of all, you should already know most of the stuff you need to know for the test. Second of all, you should study at least an hour for a test (not having any time to study is NOT an excuse). Thirdly, cheating on a test won't get you anywhere. In college (if you go to college), there is no study guide and if you fail those tests you most likely fail the entire class which is a huge waste of money.
Even if you forget to study, you still shouldn't cheat. Make up for that test in your classwork, homework and other tests. If you forget to study for a final exam, that's your fault.
For a comparison, I am an A and B student and my freshman year I took Cold War and didn't study for most of the tests and ended up with a low B or a high C (can't remember). The next year, I took American History and studied for every test and got a 97% for that class. I even aced a benchmark I forgot to study for. The American History class was harder than the Cold War class, too.