LNK2019: unresolved external symbol in VS unit-testing

Question

I get the error as stated in the title. I ensured the following:
- The Include directory, include library and additional include directory are set correctly
- In the pro

Answer 1

I know this is very late but let me explain why including the .cpp file fixes the issue.

#include "../LifeLib/StornoTafel.h"

...

LifeLib::StornoTafel stornoTafel_; // Throws unresolved external symbol

Your unit test project exists outside of your application, you have provided references to the header files which provide the declarations of your types and methods but not their definitions.

By placing references to the .cpp files the compiler can actually get the declarations of these signatures:

#include "../LifeLib/StornoTafel.h"
#include "../LifeLib/StornoTafel.cpp"

...

LifeLib::StornoTafel stornoTafel_; // Works perfectly

The simplest solution is to simply duplicate your header file reference and change .h to .cpp