如何使用 Jest 和 Proxyquire 存根模块?

How do I stub a module with Jest and Proxyquire?

我想强制node-fetch成为一个存根,我遇到了一些麻烦 让它工作。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 | });

我前两行刚加载的模块加载失败怎么办? proxyquire 不是这里使用的正确模块吗?

我已经让 node-fetch 在我的测试中成为一个模拟,但是当我 运行 模块中的函数(顶部有 const fetch = require('node-fetch'); )它会去真正的模块而不是假的。我尝试使用 fetch-mock 之类的获取模拟库无济于事。

我最后放了一个模拟:

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"
    ]
  }