What is unittest in Python?

Answer 1

Unit testing is the same concept on any language.
The most difficult part is to define what do you want to define as a unit on your code, to be tested. Some could say that is a function/method, others can say it is a feature or other piece of code.
Search for "Martin Fowler unit test"

Answer 2

https://code.sololearn.com/cV2Avd1uLwPV/?ref=app

Answer 3

Check it above for some idea