使用 axios-mock-adapter 验证请求?

Verify request with axios-mock-adapter?

我使用 axios-mock-adapter 的 MockAdapter 进行了以下测试。但是我试图断言 get 函数已被有效调用,所以我创建了一个间谍。 由于某种原因,它似乎不起作用,我得到:

expect(jest.fn()).toHaveBeenCalled()

Expected number of calls: >= 1
Received number of calls:    0

这是我的测试:

it('gets publications', async() => {

    let spy = jest.spyOn(axios, "get");
    var mock = new MockAdapter(axios);
    mock.onGet(PUBLICATIONS_PATH + '/publications').reply(200, 
        {
            answer: {
                publications: [ "pub1", "pub2", "pub3" ]
            }
        });

    let queryParameters = {
        operation: 'FSale'
    }


    const publications = await PublicationService.getPublications(queryParameters);

    expect(publications.data.answer.publications).toEqual([ "pub1", "pub2", "pub3" ]); // works fine
    expect(spy).toHaveBeenCalled(); //This fails
})

我实际上是在尝试使用这种方法

更新:这是 getPublications

的代码
async function _getPublications(queryParameters){
  return await axios({
      method: 'get',
      url: `${PUBLICATIONS_PATH}/publications`,
      cancelToken: CancelTokenService.getSource().token,
      params: queryParameters,
      headers: {
        authorization: LocalStorageService.getAuthorization(),
        'Accept': ResourcesVersions.PUBLICATION
      }
  }).then(function (response){ return response }).catch(function (error){ return (axios.isCancel(error) ? error : error.response) })

}

我不习惯在我的测试中使用 jest.spy,但我认为你可以尝试类似的东西:

import axios from 'axios';

jest.mock('axios');
...

it('gets publications', async() => {

    const get = axios.get.mockResolvedValueOnce(yourMockedData)

    let queryParameters = {
        operation: 'FSale'
    }


    const publications = await PublicationService.getPublications(queryParameters);

    expect(publications.data.answer.publications).toEqual([ "pub1", "pub2", "pub3" ]); // works fine
    expect(get).toHaveBeenCalled(); //This fails
})

在您提供的测试代码中,您正在监视 axios get 方法,但在 getPublications 方法中您没有调用该方法。相反,您直接调用 axios 方法。

由于监视 axios 默认方法并不容易,我建议更改 getPublications 中的代码以使用 get 方法:

async function _getPublications(queryParameters){
  return await axios.get(`${PUBLICATIONS_PATH}/publications`, {
      cancelToken: CancelTokenService.getSource().token,
      params: queryParameters,
      headers: {
        authorization: LocalStorageService.getAuthorization(),
        'Accept': ResourcesVersions.PUBLICATION
      }
  }).then(function (response){ return response }).catch(function (error){ return (axios.isCancel(error) ? error : error.response) })
}

您可以使用 https://github.com/ctimmerm/axios-mock-adapter#history 功能来检查已进行的实际调用并断言 URL、headers、方法和 what-else。