Since mockpp emulates all method calls there is no variable to which you can return a reference. One solution is, to use a shadow method. The trick is to separate the mocking elements and the method in question which contains a real variable.

     MOCKPP_VISITABLE1(ClassName, shadow_method, int);

     X shadow_variable;  // the variable is a class member

     const X& method(int p1)
     {
        shadow_variable = shadow_method(p1);
        return shadow;
     }
    

There is no general solution how to organise the sources to both run the tests and create a releasable binary without debugging and test code.

A flexible and clean approach is the one used within mockpp:

So the layout of your project tree might look like this:

       projectroot
                 \_ main()
                 |
                 \_ subproject1
                 |             \_ tests
                 |
                 \_ subproject2
                               \_ tests

     

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