How to use the ng-mocks.MockDirective function in ng-mocks

it('finds mocked directives', () => {
      const {findDirective} = new Rendering(fixture, element, instance, {}, testSetup);

      expect(findDirective(DirectiveToMock) instanceof MockDirective(DirectiveToMock)).toBe(true);
    });

beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [MatListModule, RouterTestingModule],
      declarations: [
        PageInformationComponent,
        MockComponent({ selector: 'mat-card' }),
        MockComponent({ selector: 'mat-card-title' }),
        MockComponent({ selector: 'mat-card-header' }),
        MockComponent({ selector: 'mat-card-content' }),
        MockComponent({ selector: 'mat-card-subtitle' }),
        MockDirective(FeedbackDrawerDirective)
      ],
      providers: [WINDOW_PROVIDER],
      schemas: [NO_ERRORS_SCHEMA]
    }).compileComponents();
  }));

beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [NgxsModule.forRoot([AppState]), HttpClientTestingModule, RouterTestingModule],
      declarations: [AppComponent, MockDirective(FeatureFlagDirective)],
      providers: [
        { provide: PersonService, useValue: null },
        { provide: SwUpdate, useValue: null },
        { provide: MailService, useValue: null },
        { provide: MatSnackBar, useValue: null },
        { provide: ServiceWorkerService, useValue: null },
        { provide: FeatureFlagService, useValue: null },
        { provide: MatDialog, useValue: null },
        { provide: I18n, useClass: MockI18nService },
        { provide: ThemeService, useValue: null }
      ],
      schemas: [NO_ERRORS_SCHEMA]
    }).compileComponents();
  }));

beforeEach(async () => {
    MockedDirective = MockDirective(DirectiveToMock);
    MockedStructuralDirective = MockDirective(StructuralDirectiveToMock);
    MockedComponent = MockComponent(ComponentToMock);
    testSetup = new TestSetup(OuterComponent, class {});
    testSetup.mockCache.add(DirectiveToMock, MockedDirective);
    testSetup.mockCache.add(ComponentToMock, MockedComponent);
    return TestBed.configureTestingModule({
      declarations: [
        TestHostComponent,
        OuterComponent,
        OtherComponent,
        InnerComponent,
        TestDirective,
        OtherDirective,
        MockedComponent,
        MockedDirective,
        MockedStructuralDirective

beforeEach(async(() => {
    TestBed.configureTestingModule({
      schemas: [NO_ERRORS_SCHEMA],
      declarations: [SettingsComponent, MockDirective(FeatureFlagDirective)],
      providers: [{ provide: ThemeService, useClass: MockThemeService }]
    }).compileComponents();
  }));

beforeEach((done) => {
    TestBed.configureTestingModule({
      declarations: [
        MockDirective(CustomTypeDirective),
        MockDirective(CustomRootComponent),
      ],
    }).compileComponents().then(done);
  });

beforeEach((done) => {
    TestBed.configureTestingModule({
      declarations: [
        MockDirective(CustomTypeDirective),
        MockDirective(CustomRootComponent),
      ],
    }).compileComponents().then(done);
  });

beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [
        TestedComponent,
        MockDirective(DependencyDirective),
      ]
    });

    fixture = TestBed.createComponent(TestedComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

beforeEach(async () => {
    MockedDirective = MockDirective(DirectiveToMock);
    MockedStructuralDirective = MockDirective(StructuralDirectiveToMock);
    MockedComponent = MockComponent(ComponentToMock);
    testSetup = new TestSetup(OuterComponent, class {});
    testSetup.mockCache.add(DirectiveToMock, MockedDirective);
    testSetup.mockCache.add(ComponentToMock, MockedComponent);
    return TestBed.configureTestingModule({
      declarations: [
        TestHostComponent,
        OuterComponent,
        OtherComponent,
        InnerComponent,
        TestDirective,
        OtherDirective,
        MockedComponent,
        MockedDirective,
        MockedStructuralDirective
      ],

beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [RouterTestingModule, TranslateModule.forRoot()],
      declarations: [
        LoginModalComponent,
        MockComponent(LoginFormContainerComponent),
        MockDirective(ServerHtmlDirective),
      ],
    }).compileComponents();
  }));