How to make google-test classes friends with my classes?

Question

I heard there is a possibility to enable google-test TestCase classes friends to my classes, thus enabling tests to access my private/protected members.

How to accomplis

Answer 1

I know this is old but I was searching for the same answer today. "gtest_prod.h" just introduces a simple macro to reference test classes.

#define FRIEND_TEST(test_case_name, test_name)\
friend class test_case_name##_##test_name##_Test

So FRIEND_TEST(FooTest, BarReturnsZeroOnNull); is equivalent to:

friend class FooTest_BarReturnsZeroOnNull_Test;

This works because each test is its own class as mentioned in the previous answer.