How to mock a child component that implements Validator

[Blackbaud-JasonBodnar]

I have a component that implements CVA and Validator. A parent component emits based on the validity of the child component. I want to test that the parent component is emitting correctly based on the child validity.

I have:

TestBed.configureTestingModule({
      imports: [
        ConsentConfigurationComponent,
        MockComponent(ConsentOptionsComponent)
      ],
      ...
});

and I can access the mock with:

ngMocks.findInstance(ConsentOptionsComponent)

But how do I define the behavior of the mock?