import { TestBed } from '@angular/core/testing'; import { UserService } from './user.service'; import {Router} from "@angular/router"; describe('UserService', () => { let service: UserService; const routerSpy = { navigate: jest.fn(), navigateByUrl: jest.fn(), }; beforeEach(() => { TestBed.configureTestingModule({ providers: [ { provide: Router, useValue: routerSpy }, // <<— spy: neutralise la navigation ], imports: [] }); service = TestBed.inject(UserService); }); it('should be created', () => { expect(service).toBeTruthy(); }); });