Tell me how to do a unit test in C language, samples, and experiences!

Hello.

I'm a beginner developer. I want to do a unit test while doing a socket program with c in the centos Linux environment, so I am posting a question like this.

Could you briefly tell me the Unit Test framework and how to use it in the C language environment?

I'm practicing socket programming with Eclipse in CentOS.

When testing the functions for normal operation, It was difficult to create main functions every time, and it was difficult to manage the files of the main functions.

I searched C Unit Test on Google.

http://stackoverflow.com/questions/65820/unit-testing-c-code I was able to find the same article as above.

Among them, I installed a tool called check and followed the document I didn't succeed because of my lack of English, and I need to understand another tool.

Could you please let me know if there is a sample or a document in Korean that I can follow? I would appreciate it more if you could tell me your experience of using it yourself.