About Software Testing

Two days later, I have to apply for a part-time software test. My job is to perform software unit testing, comprehensive testing, and random testing,
Input the result to a bug system and write the test documents in English.

I feel that my job should be quite simple, but it seems that the competition is fierce. I have a small part-time job and someone from a foreign country will apply for a job,
I can't believe it. It's hard to find a real job.

In order to prepare for the interview, I have been looking for information this afternoon. One of them is a cppunit testing tool, which seems quite good. However, I didn't understand it.
The mechanism of its operation. What's more about JUnit? It's so difficult to continue learning.

If you want to make something, you still need to study it patiently.