Angular TestBed Configure

app.component.spec.ts

let store: MockStore<AppState>;
beforeEach(() => {
  TestBed.configureTestingModule({
    declarations: [AppComponent, ItemComponent],
    imports: [ReactiveFormsModule],
    providers: [provideMockStore()],
    schemas: [CUSTOM_ELEMENTS_SCHEMA]
  });
  fixture = TestBed.createComponent(AppComponent);
  app = fixture.componentInstance;
  store = TestBed.inject(MockStore);
});