Mocks out facade fields and methods for testing purposes.
@inheritdoc
| Name | Type | Description | 
|---|---|---|
| filters$ | BehaviorSubject< DaffFilters> | |
| appliedFilters$ | BehaviorSubject< DaffFilters> | |
| productResults$ | BehaviorSubject< DaffProduct[]> | The products returned in the most recent search. | 
| dispatch |