public async Task GetCountyTest() { await Assert.ThrowsAsync <ArgumentException>(() => JdVopApi.GetCountyAsync(null, 0)); var res = await ApiInstance.GetCountyAsync(TestHelper.JDArress.CityId); Assert.True(res.Success, res.ResultMessage); var country = res.Result; Assert.NotNull(country); Assert.NotEmpty(country); Assert.Contains(TestHelper.JDArress.County, country.Keys); }