When mocha tests an asynchronous action with an ajax request, the console reports a Cannot read property 'document' of undefined error. The code is as follows:
/counter.js/

import $ from "../componet/jquery.min.js" export const CHANGE_USERNAME_ERROR = 'CHANGE_USERNAME_ERROR' export function checkUsername (name) { return (dispatch) => { $.get('/check', {username: name}, (msg) => { dispatch({ type: CHANGE_USERNAME_ERROR, error: msg }) }) } }

/counter.test.js/

import { expect } from 'chai' import sinon from 'sinon' import * as Actions from '../../public/javascripts/actions/counter'; describe('actions/register', () => { let actions let dispatchSpy let getStateSpy let xhr let requests beforeEach(function() { actions = [] dispatchSpy = sinon.spy(action => { actions.push(action) }) xhr = sinon.useFakeXMLHttpRequest() requests = [] xhr.onCreate = function(xhr) { requests.push(xhr); }; }) afterEach(function() { xhr.restore(); }); describe('Action: checkUsername', () => { it('Should call dispatch CHANGE_USERNAME_ERROR.', () => { Actions.checkUsername('foo@bar')(dispatchSpy) const body = '不能含有特殊字符' // 手动设置 ajax response requests[0].respond(200, {'Content-Type': 'text/plain'}, body) expect(actions[0]).to.have.property('type', Actions. CHANGE_USERNAME_ERROR) expect(actions[0]).to.have.property('error', '不能含有特殊字符') }) }) }) 报的是jquery.min.js中的错误，我是在控制台跑的mocha，麻烦各位给参谋参谋！拜谢