axios-mock-适配器与预期的url不匹配

Question

我曾经非常成功地使用axios-mock-adapter，但最近几次我尝试使用它时，我的路由似乎从未匹配过，它仍在尝试执行一个真正的端点。

为什么这个单元测试仍然调用example.com并返回404？我本以为它会返回500。

test/libs/orgService/index.spec.js

const uuid = require('uuidv4')
const axios = require('axios')
const MockAdapter = require('axios-mock-adapter')
const mock = new MockAdapter(axios)
const { getOrgById } = require('../../../src/libs/orgService/index')
const chai = require('chai')
const chaiAsPromised = require('chai-as-promised')
chai.use(chaiAsPromised)
const expect = chai.expect
const orgServiceHost = 'https://example.com'

describe.only('#getOrgById failure', () => {
  const id = uuid()
  before(() => {
    console.log('`${orgServiceHost}/organizations/${id}` = ', `${orgServiceHost}/organizations/${id}`)
    mock.onGet(`${orgServiceHost}/organizations/${id}`).reply(500) <-- SHOULD BE RETURNING 500!!
  })

  after(() => {
    mock.reset()
  })

  it('should fail to fetch an organization', () => {
    return expect(getOrgById(orgServiceHost, id, tkn)).to.eventually.be.rejected
  })
})

src/libs/orgService/index.js

const axios = require('axios')

function getOrgById (orgServiceHost, id, token) {
  log.debug('orgServiceHost = ', orgServiceHost)
  log.debug('id = ', id)
  log.debug('token = ', token)
  return new Promise((resolve, reject) => {
    if (id === undefined) {
      return resolve()
    }
    console.log('`${orgServiceHost}/organizations/${id}` = ', `${orgServiceHost}/organizations/${id}`)
    axios({
      url: `${orgServiceHost}/organizations/${id}`,
      method: 'GET',
      headers: {
        Authorization: `Bearer ${token}`,
        Accept: 'application/json',
      }
    })
      .then(res => {
        return resolve(res.data)
      })
      .catch(err => {
        log.error('getOrgById err = ', err)
        return reject(err)
      })
  })
}

module.exports = { getOrgById }

Answer 1

(注:我没有足够的信用来评论，所以请将下面的答案发布为答案。)

我不确定这是否有效，但请尝试创建一个axios实例

before(() => {
 instance = AxiosApi.getAxiosInstance();
 mock = new MockAdapter(instance);
 mock.onGet(`${orgServiceHost}/organizations/${id}`).reply(500);
})

Answer 2

问题是您从服务返回一个Promise。尝试如下所示：

it('should fail to fetch an organization', (done) => {
    getOrgById(orgServiceHost, id, tkn)
      .then(() => {
        assert.fail("custom error message"); // or any other failure here
        done();
      }).catch((exception) => {
        expect(true).toBeTruthy(); // or any other way to pass the test
        done();
      });
  });