angular - 我正在尝试使用 jasmine 和 angular 测试来自服务的 api 请求，但没有成功

Question

当我尝试将响应与从服务器返回的对象进行比较时，它返回一条错误消息，指出 Expected undefined to equal Object({ data: '2019-11-21T13:00:03.070Z', desconhecido: false, id: 21214, ip: '444.444.44.44', nomeUsuario: 'rodrigo.spinelli', sucesso: true, usuarioId: 1414, usuarioNome: 'rodrigo abreu' }).:

beforeEach(() => {

        TestBed.configureTestingModule({
          imports: [HttpClientTestingModule],
          providers: [AcessoService]
        });

        httpTestingController = TestBed.get(HttpTestingController);
        service = TestBed.get(AcessoService);
      });

      afterEach(() => {
        httpTestingController.verify();
      });


      const profileInfo = {
        data: new Date('2019-11-21T10:00:03.07').toISOString(),
        desconhecido: false,
        id: 21214,
        ip: '444.444.44.44',
        nomeUsuario: 'rodrigo.spinelli',
        sucesso: true,
        usuarioId: 1414,
        usuarioNome: 'rodrigo abreu'
      };

        const index = '1';
        const itemsPage = '1';
        const usuarioId = '';
        const nomeUsuario = '';
        const dataIni = new Date('2019-11-01T18:25:39.000Z').toISOString();
        const dataFim = new Date('2019-11-30T18:25:39.000Z').toISOString();
        const ip = '';
        const sucesso = '';
        const orderBy = '';

        let Acessos;


      it('can load instance', () => {
        expect(service).toBeTruthy();
      });

      it('getDepartmentMapping() should return data', () => {

        service.getAcessos(index, itemsPage, '', '', dataIni, dataFim, '', '', '').subscribe(res => {
          Acessos = res.items;
        });

      expect(Acessos).toEqual(profileInfo);
      });

    });

Answer 1

这是因为 getAccessos 具有异步行为。它返回一个 Observable 并且你也订阅它。当它为您提供下一个数据时，您会在上下文中而不是在上下文之外得到结果。 Accessos 在订阅的解析函数之外未定义。

像这样尝试:

...
it('getDepartmentMapping() should return data', async () => {
  Acessos = await service.getAcessos(index, itemsPage, '', '', dataIni, dataFim, '', '', '').pipe(take(1)).pipe(map((res) => { return res.items; })).toPromise();
  expect(Acessos).toEqual(profileInfo);
});
...