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 accomplish that?

Answer 1

Try this (straight from Google Test docs...):

FRIEND_TEST(TestCaseName, TestName);

For example:

// foo.h
#include <gtest/gtest_prod.h>

// Defines FRIEND_TEST.
class Foo {
  ...
 private:
  FRIEND_TEST(FooTest, BarReturnsZeroOnNull);
  int Bar(void* x);
};

// foo_test.cc
...
TEST(FooTest, BarReturnsZeroOnNull) {
  Foo foo;
  EXPECT_EQ(0, foo.Bar(NULL));
  // Uses Foo's private member Bar().
}