import { TestBed } from '@angular/core/testing'; import { TutorialService } from './tutorial.service'; describe('TutorialService', () => { let service: TutorialService; beforeEach(() => { TestBed.configureTestingModule({}); service = TestBed.inject(TutorialService); }); it('should be created', () => { expect(service).toBeTruthy(); }); });