How to write tests?

Question

C++ / C#

I really don't understand how to do it.
So much has been written about tests, but nowhere is there a clear explanation of what it is.
Create a separate project in the IDE for tests? Create module/package?

Answer 1

If we are talking about unit tests, then in fact these are separate small programs that check the performance of various parts of your project. In principle, these can be separate projects in the IDE. To facilitate writing such programs, there are specialized libraries like google test .