public create(user:User): Observable<any> {
  return this.http.post(this._apiUrls.create,
    JSON.stringify(user), {
      headers: this.apiConfig.getApiHeaders()
    });
}

beforeEachProviders(() => [
  MockBackend,
  BaseRequestOptions,
  provide(Http, {
    useFactory: (backend, defaultOptions) => new Http(backend, defaultOptions),
    deps: [MockBackend, BaseRequestOptions]
  }),
  ApiConfig,
  Authentication
]);

it('Should make a request to login a new user', inject([Authentication, MockBackend], (service, mockBackend) => {
  let connection;
  connection = mockBackend.connections.subscribe(c => connection = c);
  service.create(setUser()).subscribe((res) => {
    expect(connection.request.url).toBe(service.apiConfig.getApiRoot()+'api/identities/login');
    expect(connection.request._body).toEqual(JSON.stringify(setUser()));
  });
  connection.mockRespond(200);
}));