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