Example usage with a mocking framework

[realmhamdy]

I'm trying to use Fruit with FakeIt in a unit test. Needless to say, I'm stuck.
I have quite a normal setup here for the code under test:

// component required by the main component
Component<RequiredComponent> getRequiredComponent() {
  return createComponent()
      .bind<RequiredComponent, RequiredComponentImpl>();
}

// component required in testing
class DependentComponent {
  INJECT(DependentComponent(RequiredComponent * reqComp, ASSISTED(double) arg)) = default;
}

using DependentFactory = function<unique_ptr<DependentComponent>(double)>;
Component<Required<RequiredComponent>, DependentFactory> getDependentComponent() {
  return createComponent().install(getRequiredComponent());
}

The compiler is happy and so I am. Now to the test:

Mock<RequiredComponent> mockRequired;
When(Method(mockRequired, someMethod)).Return(fakeData);
// now what ??

How to get the mock object, returned by mockRequired.get() and install it in the factory?

[poletti-marco]

I don't understand why you're installing getRequiredComponent() in getDependentComponent().
As far as I understand, you don't want to use the real RequiredComponent object, you want to use a mock instead.
You could pass the mock object as a parameter to getDependentComponent() and do a bindInstance() there of the mock. E.g. something like:

Component<Required<RequiredComponent>, DependentFactory> 
    getDependentComponent(RequiredComponent& requiredComponent) {
  return createComponent().bindInstance(requiredComponent);
}
...
Mock<RequiredComponent> mockRequired;
When(Method(mockRequired, someMethod)).Return(fakeData);
Injector<DependentComponent> injector(getDependentComponent(mockRequired.get()));
...

[realmhamdy]

Thank you @poletti-marco. That helped.