gtest使用友元类测试私有函数

私有函数怎么测?

What is the best way of testing private methods with GoogleTest? [closed]

OPTION 2 修正后

/*example*/

class Foo
{
public:
    Foo(){}
    friend class FooTest;
private:
    int bar(){return 1;}
};

class FooTest : public ::testing::Test
{
public:
    FooTest(){}
    int bar() { return foo.bar();}

private:
    void TestBody(){}

private:
    Foo foo;
};

TEST(FooTest, ALL)
{
    FooTest ft;
    EXPECT_EQ(ft.bar(), 1);
}


int main(int argc, char** argv)
{
    ::testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}