角度认证服务单元测试

Question

我有一个身份验证代码，该代码调用另一个服务的checkAuthorization

身份验证，似乎无法读取该属性。

checkAuthorization代码在httpservice.ts文件中

AuthService.Ts
    
    @Injectable()
    export class AuthService {
    
      constructor(private httpService: HttpService) {
    
      }
    
      public isAuthenticated(): boolean {
        let isAuthorized: boolean;
        const access_token = sessionStorage.getItem('access_token');
        this.httpService.checkAuthorization().subscribe(response => {
           isAuthorized = response;
         });
       return isAuthorized;
      }
    

httpservice.ts
  public checkAuthorization(): Observable<any> {
    const httpOptions = {
      headers: new HttpHeaders({
        'Content-Type': 'application/json',
        'Cache-Control':  'no-cache, no-store, must-revalidate, post-check=0, pre-check=0',
        'Pragma': 'no-cache',
        'Expires': '0'
      })
    };
    return this.http.post<any>(
      this.apiUrl + ApiEndpoints.API_ENDPOINT_CONSTANTS.AUTHORIZATION, httpOptions)
      .pipe(map(data => this.handleResponse(data), catchError(this.handleError)));
  }
  handleResponse(res: any) {
      return res;
  }
  public handleError(error: any) {
    return Observable.throw(error || 'Server Error');
  }

测试文件：Authservice.spec.ts

    describe('Service: AuthService', () => {
      let service: AuthService;
      let fixture: ComponentFixture<AuthService>;
      let httpservice: HttpService;
    
      beforeEach(async(() => {
        TestBed.configureTestingModule({
          imports:[
            HttpClientTestingModule
          ],
          providers: [
            AuthService,
            HttpService,
           // DataMappingService,
            SessionStorageService,
            GoogleAnalyticsEventsService,
          //{ provide: HttpClient, useValue: httpservice }
          ]
        });
      }));
    
      fit('should return true from isAuthenticated when there is a token',() => {
        let mockResponse : boolean=true;
        localStorage.setItem('access_token','1234');
        httpservice.checkAuthorization();
        expect(service.isAuthenticated).toBe(mockResponse);
    
       // spyOn(window.sessionStorage, 'getItem').and.returnValue('1234');
       // spyOn(httpservice,'checkAuthorization').and.returnValue(mockResponse);
     
       });
    
    

我不断收到错误消息：TypeError：无法读取属性'checkAuthorization'

未定义