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: Consider a Person class where the Init() method is called within 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 Person:

TEST_F(PersonTests, FakeMethodInConstructor)

{

   // Arrange

   auto a = Isolator();  

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

   Person* personHandle = a.Fake.All<Person>(FakeOptions::CallOriginal);

   // Fake Init method that will be called in constructor 

   a.CallToPrivate(A::Member(personHandle,Init)).WillBeIgnored();

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

   Person person;

   // Continue with test...

}

Note: You can also use Invoke(A::Ctor()) 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 = a.Fake.Instance<Person>();

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

   a.Invoke(A::Ctor(fakePerson));

   // Continue with test...

}

See the InvokeOriginal API for more information.