Question

我正在尝试使用ts-mockito测试API端点。一切顺利，直到我开始异步... 我的测试：

it('should throw an error if the address is not valid',()=>{
  const mockedGeolocationService: GoogleGeolocationService = mock(GoogleGeolocationService);
  when(mockedGeolocationService.getLocation(address)).thenThrow(new Error("the address provided is not valid"));
  const geolocationService: IGeolocationService = instance(mockedGeolocationService);

  const addressService: AddressService = new AddressService(geolocationService, new MongoAddressRepository());
  expect(() => addressService.storeAddress(address)).to.throw("the address provided is not valid");
});

服务：

public storeAddress = (address: Address): void => {
  const location = this.geolocationService.getLocation(address);
  address.setLocation(location);
  this.addressRepository.store(address);
}

到目前为止，一切正常。但是，当我开始实施地理定位服务时，我不得不将其声明为Promise，因为它会执行http请求。

public storeAddress = async (address: Address): Promise<void> => {
  const location = await this.geolocationService.getLocation(address);
  address.setLocation(location);
  this.addressRepository.store(address);
}

然后，如果毕竟抛出了错误，我将无法捕获抛出的错误... 任何线索，我应该如何捕获或引发此错误？预先感谢。

Answer 1

我想出了解决错误的方法，为了让别人有帮助，我留下了答案。事实是，由于它是一个异步函数，因此无法捕获错误。必须手动处理它并比较错误（作为字符串），如下所示：

it('should throw an error if the address is not valid',(done)=>{
    const mockedGeolocationService: GoogleGeolocationService = mock(GoogleGeolocationService);
    when(mockedGeolocationService.getLocation(address)).thenThrow(new Error("the address provided is not valid"));
    const geolocationService: IGeolocationService = instance(mockedGeolocationService);

    const addressService: AddressService = new AddressService(geolocationService, new MongoAddressRepository());
    addressService.storeAddress(address).catch(error => {
        expect(error.toString()).to.be.equal(new Error("the address provided is not valid").toString());
        done();
    });
});

在异步函数中使用ts-mockito引发错误

1 个答案: