Question

I want to create an Macro that will help in unit testing for c++. where i do not want to create a new object for only testing purposes. Is it possible to pass a class function reference like (ClassName::function) ?

#define TEST(func_ptr,X,Expercted) \
(__extension__ ( \
{ \
  __typeof__(X) __x = (X); \
  __typeof__(Expercted) __y = (Expercted); \
  result= funct_ptr(__x);\
  //------- do some testing stuffs-----\
 } \
))

I have a Class A and its method square()

int main(){
  TEST(&A::square,2,4);
  return 0;
 }

I want to test whether the square function returns the true value.

The Above codes gives error. How to solve the problem. Solution in other ways is appreciable

Answer 1

You are passing a non static member function pointer, which requires a class instance to call. If you change that to a static member or a free function, it should work OK.

class A{
    ...
    static bool square(...);
};

TEST(A::square,...);

or

bool square(...);

TEST(square,...);

Also your macro has a typo – func_ptr vs funct_ptr