Deep Chaining

With Isolator++ Professional, you can fake a chain of members in one command, making it especially useful for APIs where multiple objects return each other.

This feature simplifies the process by allowing you to fake an entire chain without manually creating individual fakes for each member in the chain.

Note: Deep Chaining also supports Conditional Behavior Faking

When you use Deep Chaining, every method in the chain gets mocked and its behavior is set to default.

If the method is void, it will instead be ignored.

Example

In this example, the GetLocation method returns a fake GPSLocation, even though it isn't explicitly faked in the test. The chained call GetLocation()->Latitude() is set to return 10, which is then used in the method under test, GetLocationLatitude.

TEST_F(Examples, SettingChainedMethodsBehavior)

{

   // Arrange

   auto a = Isolator();  

   Person* livePerson = new Person();

   Address * fakeAdd = a.Fake.Instance<Address>();

   a.CallTo(fakeAdd->GetLocation()->Latitude()).WillReturn(10);

   // Act

   auto result = livePerson->GetLocationLatitude(fakeAdd);  

   // Assert

   ASSERT_EQ(10, result); 

}

//The method under test

int Person::GetLocationLatitude(Address* pAddress)

{

 return pAddress->GetLocation()->Latitude();

}