refactor: auto-update mechanism

src/app/app.component.spec.ts

@@ -11,11 +11,13 @@ import { RouterTestingModule } from '@angular/router/testing';
 import { provideMockStore } from '@ngrx/store/testing';
 import { TranslatePipe, TranslateService } from '@ngx-translate/core';
 import { MockModule, MockPipe, MockProviders } from 'ng-mocks';
+import { NgxIndexedDBService } from 'ngx-indexed-db';
 import { NgxWhatsNewModule } from 'ngx-whats-new';
 import { of } from 'rxjs';
 import { AppComponent } from './app.component';
 import { DataService } from './services/data.service';
 import { ElectronServiceStub } from './services/electron.service.stub';
+import { PlaylistsService } from './services/playlists.service';
 import { SettingsService } from './services/settings.service';
 import { WhatsNewService } from './services/whats-new.service';
 import { WhatsNewServiceStub } from './services/whats-new.service.stub';
@@ -23,10 +25,6 @@ import { Language } from './settings/language.enum';
 import { Theme } from './settings/theme.enum';
 import { STORE_KEY } from './shared/enums/store-keys.enum';
 
-class MatSnackBarStub {
-    open(): void {}
-}
-
 jest.spyOn(global.console, 'error').mockImplementation(() => {});
 
 describe('AppComponent', () => {
@@ -43,10 +41,14 @@ describe('AppComponent', () => {
             TestBed.configureTestingModule({
                 declarations: [AppComponent, MockPipe(TranslatePipe)],
                 providers: [
-                    { provide: MatSnackBar, useClass: MatSnackBarStub },
                     { provide: WhatsNewService, useClass: WhatsNewServiceStub },
-                    MockProviders(TranslateService),
-                    SettingsService, // TODO: stub
+                    MockProviders(
+                        TranslateService,
+                        PlaylistsService,
+                        NgxIndexedDBService,
+                        MatSnackBar
+                    ),
+                    SettingsService,
                     {
                         provide: DataService,
                         useClass: ElectronServiceStub,
@@ -70,6 +72,9 @@ describe('AppComponent', () => {
         translateService = TestBed.inject(TranslateService);
         whatsNewService = TestBed.inject(WhatsNewService);
         component = fixture.componentInstance;
+
+        // TODO: investigate in detail
+        component.triggerAutoUpdateMechanism = jest.fn();
         component.modals = [];
         fixture.detectChanges();
     });