Creating Test Case for Angular Service with Dependencies Using TestBed

Good Day.

Currently running a project in angular framework. I am attempting to write a test case for a service with dependencies, but obviously do not understand the how to scaffold it. Below are the two classes in question.

This is the LoginService

@Injectable({
  providedIn: 'root'
})
export class LoginService implements CanActivate, OnInit {

  constructor(private router: Router,
              private httpClient: HttpClient,
              private cookieService: CookieService) { }

This is the test class for LoginService:

import {Router} from '@angular/router';
import {CookieService} from 'angular2-cookie/core';
import {ComponentFixture, TestBed} from '@angular/core/testing';
import {LoginService} from './login.service';
import {HttpClient} from '@angular/common/http';

describe('Service: LoginService', () => {

  let router: Router;
  let httpClient: HttpClient;
  let cookieService: CookieService;
  let service: LoginService;
  let fixture: ComponentFixture<LoginService>;

  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [LoginService],
      providers: [Router, HttpClient, CookieService]
    });

    fixture = TestBed.createComponent(LoginService);
    service = fixture.componentInstance;
    router = TestBed.get(Router);
    httpClient = TestBed.get(HttpClient);
    cookieService = TestBed.get(CookieService);
  });

  it('should return true from isLoggedIn when token is set', function () {
    spyOn(cookieService, 'get').and.returnValue('true');
    expect(service.isLoggedIn()).toBeTruthy();
  });
});

It is simple as I am trying it out. The error I am getting is :

Error: Unexpected value 'LoginService' declared by the module 'DynamicTestModule'. Please add a @Pipe/@Directive/@Component annotation.
    at syntaxError (http://localhost:9876/node_modules/@angular/compiler/fesm5/compiler.js?:2547:1)

Basically my intention is to have the LoginService's dependencies injected and then use the spyOn method within the individual tests to disrupt flow as I deem fit.

A nudge in the right direction would be appreciated. If the solution is documented please do link.

Are services treated in a different way compared to the Components when using the TestBed? If I am honest I am not sure how to interpret the error as why would a Service have those annotations?

Regards.