If you choose a topic, your tutor usually only gives you a general scope. You should hand in a topic report at the beginning of your senior year, and then give you some topics for your reference. Of course, if you think you really want to do something, you can talk to your tutor and generally agree. There is no need to worry too much about graduation project now.
If you download the graduation thesis, things like Wanfang and China Knowledge Network are all good, but it is best to use the school intranet, otherwise there will be a charge for downloading.
The following are the complete works of graduation thesis related websites for your reference.
/daquan.htm
Well testing can't be anything else. It's easy to find on the paper net. Don't worry.