How to use the ngx-bootstrap/datepicker.BsDatepickerModule.forRoot function in ngx-bootstrap

imports: [
    BrowserModule,
    FormsModule,
    HttpClientModule,
    BrowserAnimationsModule,
    appRoutes,
    ClipboardModule,
    JwBootstrapSwitchNg2Module,
    TooltipModule.forRoot(),
    ToastrModule.forRoot(),
    ModalModule.forRoot(),
    CollapseModule.forRoot(),
    PopoverModule.forRoot(),
    BsDropdownModule.forRoot(),
    SlimLoadingBarModule.forRoot(),
    BsDatepickerModule.forRoot(),
    YagaModule
  ],
  declarations: [AppComponent,
    LoginComponent,
    ShareLoginComponent,
    GalleryComponent,
    FacesComponent,
    // misc
    FrameComponent,
    LanguageComponent,
    // Gallery
    GalleryLightboxMediaComponent,
    GalleryPhotoLoadingComponent,
    GalleryGridComponent,
    GalleryDirectoryComponent,
    GalleryLightboxComponent,

describe('RbdTrashMoveModalComponent', () => {
  let component: RbdTrashMoveModalComponent;
  let fixture: ComponentFixture;
  let httpTesting: HttpTestingController;

  configureTestBed({
    imports: [
      ReactiveFormsModule,
      HttpClientTestingModule,
      RouterTestingModule,
      SharedModule,
      ToastrModule.forRoot(),
      BsDatepickerModule.forRoot()
    ],
    declarations: [RbdTrashMoveModalComponent],
    providers: [BsModalRef, BsModalService, i18nProviders]
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(RbdTrashMoveModalComponent);
    component = fixture.componentInstance;
    httpTesting = TestBed.get(HttpTestingController);

    component.metaType = 'RBD';
    component.poolName = 'foo';
    component.imageName = 'bar';
  });

  it('should create', () => {

}

@NgModule({
  imports: [
    AppStoreModule,
    CommonModule,
    FormsModule,
    HttpClientModule,
    RouterModule,
    SharedModule,
    ClickOutsideModule,
    GuardsModule,
    BrowserAnimationsModule,
    NotificationsModule,
    AlertModule.forRoot(),
    BsDatepickerModule.forRoot(),
    BsDropdownModule.forRoot(),
    PopoverModule.forRoot(),
    ModalModule.forRoot(),
    TimepickerModule.forRoot(),
    TypeaheadModule.forRoot(),
    DeviceDetectorModule.forRoot(),
  ],
  declarations: [HomeComponent, RedirectComponent],
  providers: [
    {
      provide: ErrorHandler,
      useClass: SentryErrorHandler,
    },
    httpInterceptorProviders,
    CollectionService,
    DocumentService,

entryComponents: [
    RbdDetailsComponent,
    RbdSnapshotFormComponent,
    RbdTrashMoveModalComponent,
    RbdTrashRestoreModalComponent,
    RbdTrashPurgeModalComponent
  ],
  imports: [
    CommonModule,
    MirroringModule,
    FormsModule,
    ReactiveFormsModule,
    TabsModule.forRoot(),
    ProgressbarModule.forRoot(),
    BsDropdownModule.forRoot(),
    BsDatepickerModule.forRoot(),
    TooltipModule.forRoot(),
    ModalModule.forRoot(),
    SharedModule,
    RouterModule
  ],
  declarations: [
    RbdListComponent,
    IscsiComponent,
    RbdDetailsComponent,
    RbdFormComponent,
    RbdSnapshotListComponent,
    RbdSnapshotFormComponent,
    RbdTrashListComponent,
    RbdTrashMoveModalComponent,
    RbdImagesComponent,
    RbdTrashRestoreModalComponent,

import { UserPasswordFormComponent } from './user-password-form/user-password-form.component';
import { UserTabsComponent } from './user-tabs/user-tabs.component';

@NgModule({
  imports: [
    BsDropdownModule.forRoot(),
    ButtonsModule.forRoot(),
    CommonModule,
    FormsModule,
    PopoverModule.forRoot(),
    ReactiveFormsModule,
    SharedModule,
    TabsModule.forRoot(),
    RouterModule,
    NgBootstrapFormValidationModule,
    BsDatepickerModule.forRoot()
  ],
  declarations: [
    LoginComponent,
    RoleDetailsComponent,
    RoleFormComponent,
    RoleListComponent,
    SsoNotFoundComponent,
    UserTabsComponent,
    UserListComponent,
    UserFormComponent,
    UserPasswordFormComponent
  ]
})
export class AuthModule {}

const routes: Routes = [

locales.forEach((locale: LocaleData) => {
  if (!locale.abbr) {
    return;
  }

  defineLocale(locale.abbr, locale);
});

@NgModule({
  declarations: [
    DatepickerSectionComponent,
    ...DEMO_COMPONENTS
  ],
  imports: [
    DatepickerModule.forRoot(),
    BsDatepickerModule.forRoot(),
    TabsModule.forRoot(),
    CommonModule,
    FormsModule,
    ReactiveFormsModule,
    DocsModule,
    RouterModule.forChild(routes)
  ],
  exports: [DatepickerSectionComponent],
  entryComponents: [...DEMO_COMPONENTS]
})
export class DemoDatepickerModule {}

const DASHBOARD_INDEX_ROUTE = [
    {path: '', component: DashboardIndexComponent}
];

@NgModule({
    declarations: [
        DashboardIndexComponent
    ],
    imports: [
        CommonModule,
        AngularEchartsModule,
        TooltipModule.forRoot(),
        BsDropdownModule.forRoot(),
        BsDatepickerModule.forRoot(),
        ModalModule.forRoot(),
        RouterModule.forChild(DASHBOARD_INDEX_ROUTE)
    ],
    providers: []
})

export class DashboardIndexModule {
}

import { routedComponents, ProgramsRoutingModule } from './programs-routing.module';
import { ProgramsService } from './programs.service';
import { ProgramPlayInfoComponent } from './program-play-info.component';

@NgModule({
  imports: [
    CommonModule,
    FormsModule,
    ReactiveFormsModule,
    LoadingBarModule.forRoot(),
    LoadingBarHttpClientModule,
    LoadingBarRouterModule,
    HotkeyModule,
    ToastModule.forRoot(),
    CollapseModule.forRoot(),
    BsDatepickerModule.forRoot(),
    BsDropdownModule.forRoot(),
    ModalModule.forRoot(),
    PaginationModule.forRoot(),
    TabsModule.forRoot(),
    ContextMenuModule.forRoot({
      useBootstrap4: true,
      autoFocus: true,
    }),
    CommentModule,
    SharedModule,
    PlayerModule,
    ProgramsRoutingModule,
  ],
  declarations: [
    routedComponents,
    ProgramPlayInfoComponent,

}]
    }),
    NgxPermissionsModule.forRoot(),
    TokenModule.forRoot({
      withoutTokenUrls: [
        '/api/account/info',
        '/api/account/login'
      ]
    }),
    AccountModule.forRoot(),
    ThemesModule.forRoot(),
    RouterModule.forRoot(AppRoutes, { preloadingStrategy: PreloadAllModules, initialNavigation: 'enabled' }),
    ModalModule.forRoot(),
    AuthModalModule,
    NavbarModule,
    BsDatepickerModule.forRoot()
  ],
  providers: [
    { provide: ErrorHandler, useClass: CustomErrorHandler },
    ErrorsExtractor,
    AccountConfig,
    GroupsConfig,
    PermissionsConfig,
    ContentTypesConfig,
    UsersConfig,
    BsLocaleService
  ],
  bootstrap: [AppComponent]
})
export class AppModule {
}

beforeEach(async(() => {

        TestBed.configureTestingModule({

            imports: [
                ReactiveFormsModule,
                NoopAnimationsModule,
                BsDatepickerModule.forRoot(),
                TextMaskModule,
                DynamicFormsCoreModule
            ],
            declarations: [DynamicBootstrapDatePickerComponent]

        }).compileComponents().then(() => {

            fixture = TestBed.createComponent(DynamicBootstrapDatePickerComponent);

            component = fixture.componentInstance;
            debugElement = fixture.debugElement;
        });
    }));