如何使用Jest和Proxyquire存根模块?

时间:2018-07-06 23:33:27

标签: mocking jestjs proxyquire node-fetch

我想强迫node-fetch成为存根,但遇到了一些麻烦 使它工作。代码:

const fetchMock = jest.fn();

const {
  getArticle 
} = require('../../sfpublish/api');
console.log('loaded api')
const A = global.proxyquire('../../sfpublish/api', {
  'node-fetch': fetchMock
});

setup.js

global.proxyquire = require('proxyquire');

package.json

"jest": {
    "automock": false,
    "globalSetup": "./test/__config.js",
    "setupFiles": [
      "./test/__setup.js"
    ]
  },

结果:

FAIL  test/sfpublish/api.test.js
  ● Test suite failed to run

    Cannot find module '../../sfpublish/api'

      23 | } = require('../../sfpublish/api');
      24 | console.log('loaded api')
    > 25 | const A = global.proxyquire('../../sfpublish/api', {
         |                  ^
      26 |   'node-fetch': fetchMock
      27 | });

如何无法加载我之前加载2行的模块? proxyquire不是在此处使用的正确模块吗?

在测试中,我已经node-fetch成为模拟对象,但是当我在模块中运行该函数(顶部为const fetch = require('node-fetch');)时,它将转到真实的模块中,而不是假的。我已经尝试过使用fetch-mock之类的访存嘲讽库无济于事。

1 个答案:

答案 0 :(得分:0)

我最终加入了一个模拟:

test / __ mocks __ / node-fetch.js

'use strict';
const nodeFetch = jest.genMockFromModule('node-fetch');
module.exports = nodeFetch;

package.json:

 "jest": {
    "verbose": true,
    "automock": false,
    "globalSetup": "./test/__config.js",
    "coverageReporters": [
      "text-summary",
      "html"
    ],
    "roots": [
      "./test"
    ],
    "setupFiles": [
      "./test/__setup.js"
    ]
  }