Faking methods called in constructor

To fake methods that are called in the constructor (without faking the whole constructor itself) use the following pattern.

Example. For our example we have a Person class with that calls the Init() method in the constructor.

class Person

{

private:

   Address* m_address

   void Init() { m_address = new Address();}

public:

   Person() { Init(); } 

}

With the FAKE_ALL API, we create a fake Person object, we can then fake the Init() method before instantiating the new Address:

TEST_F(PersonTests, FakeMethodInConstructor)

{

   // Fake all Persons, but call the real method, we get a handle 

   Person* fakePerson = FAKE_ALL<Person>(FakeOptions::CallOriginal);

   // Fake Init method that will be called in constructor 

   PRIVATE_WHEN_CALLED(fakePerson,Init).Ignore(); 

   // Create a new person, the Init will not run

   Person person;

   // Continue with test...

}

Note: You can also use ISOLATOR_INVOKE_CONSTRUCTOR after you setup the Fake, to do the same:

TEST_F(PersonTests, FakeMethodInConstructor)

{

   // Fake a Person, all methods are fake, constructor is not called

   Person* fakePerson = FAKE<Person>();

   // Call constructor, Init is Faked by default, you can change any behavior before calling the constructor

   ISOLATOR_INVOKE_CONSTRUCTOR(fakePerson); 

   // Continue with test...

}