[UnitTest] @Self Annotation using Mangeto and a CIF Model within custom Model

Hi Community, 

I'm trying to write my Unit test for a model created to interact with the MagentoGraphqlClient Object. 

My doubt here comes when I need to inject a mocked object using the @1961677  annotation.

@Self(injectionStrategy = InjectionStrategy.OPTIONAL)
private MagentoGraphqlClient magentoGraphqlClient;

 Also for a CIF Model that is being called within my custom model.

@Self(injectionStrategy = InjectionStrategy.OPTIONAL)
@Via(type = ResourceSuperType.class)
private com.adobe.cq.commerce.core.components.models.productlist.ProductList productList;

 Does anybody have any idea how can I inject these mocked objects and interact with the returning values within my Model?

Regards.