Question

我正在尝试测试此服务呼叫

get(): Observable<Country[]> {
const config = { params: new HttpParams().set('pagesize', '300') };
return this.http
  .get<any>(`${api_url}countries`, config)
  .pipe(map(response => (response.data as Country[]))); }

这是测试：

describe('CountriesService Tests', () => {

let countriesService: CountriesService;
let httpTestingController: HttpTestingController;

let countries: Country[] = [
    { Country: 'ALBANIA', CountryCode: 'AL', ReportingCountryCode: 'ALB' },
    { Country: 'Canada', CountryCode: 'CA', ReportingCountryCode: 'CND' }];
beforeEach(() => {

    TestBed.configureTestingModule({
        imports: [HttpClientTestingModule],
        providers: [CountriesService]
    });
    countriesService = TestBed.get(CountriesService);
    httpTestingController = TestBed.get(HttpTestingController);
});
afterEach(() => {
    httpTestingController.verify();
});

it('should return all countries', () => {
    countriesService.get().subscribe((data: Country[]) => {
        expect(data).toBe(countries);
    });
    const url = ({ const: environment.url + 'countries', params: {'pagesize': '300'}});

    let countriesRequest: TestRequest = httpTestingController.expectOne(url.const + url.params);

    expect(countriesRequest.request.method).toEqual('GET');

    countriesRequest.flush(countries);
})});

我收到此错误：错误：预期对标准“匹配URL：/ api / publicdata / countries [对象对象]”的一个匹配请求，未找到任何请求。这是我们传递给调用的参数问题，我不确定如何添加它们。你能帮忙吗？

Answer 1

不确定OP是否已修复！

expectOne(url.const + url.params) // Wrong
expectOne(url.const + '?param1=value') // should be that

Answer 2

创建http调用后，您可能会期待它，请尝试以下测试用例

    it('should return all countries', () => {

    const url = ({ const: environment.url + 'countries', params: {'pagesize': '300'}});

    let countriesRequest: TestRequest = httpTestingController.expectOne(url.const + url.params);

    countriesService.getCountries().subscribe((data: Country[]) => {
            expect(data).toBe(countries);
        });

    expect(countriesRequest.request.method).toEqual('GET');

    countriesRequest.flush(countries);
})});

Answer 3

可能我来晚了，但是下面的解决方案适用于你们

创建一个HttpParams对象，并在其中append()您的所有查询参数。
创建HttpRequest对象并为其提供适当的值。
然后按如下所示致电httpTestingController.expectOne()
我使用urlWithParams来比较网址，因为它减少了检查每个网址的代码参数对象。

 it('should return all countries', fakeAsync(() => {

    countriesService.getCountries().subscribe((data: Country[]) => {
            expect(data).toBe(countries);
        });
     // you can create multiple parameters by appending on same object 
    let parameters = new HttpParams().append('pagesize', '30');
     
    // environment is your base url
    const httpReq = new HttpRequest('GET',environment.url, {params:parameters}); 

    let countriesRequest = httpTestingController.expectOne((req:HttpRequest)=>
        req.method === httpReq.method && req.urlWithParams === httpReq.urlWithParams
    );
   
    countriesRequest.flush(countries);
    httpTestingController.verify();
});

带参数的角度http服务调用单元测试

3 个答案: