<!--some other component html--!>
 <div class="mx-auto" style="width: max-content">
                <ngb-pagination [collectionSize]="currentView.totalTaskCount" [(page)]="currentView.currentPage" [maxSize]="10"
                                [pageSize]="currentView.pageSize" [rotate]="true" [boundaryLinks]="true"
                                (pageChange)="currentView.setCurrentPageSlice($event)">

                </ngb-pagination>
</div>

'ngb-pagination' is not a known element:
1. If 'ngb-pagination' is an Angular component, then verify that it is part of this module.
2. If 'ngb-pagination' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message.

//imports..

    describe('App: WorkFlowDisplay Component', () => {

      beforeEach(async(() => {
        params = new Subject<Params>();
        TestBed.configureTestingModule({
          imports: [RouterTestingModule],
          declarations: [WorkflowDisplayComponent,
TaskComponent, DatePipe,ModalService,UserList,<<?ngBootstrapComponent???>
          ],
    //some more code