Question

我之前编写过一个测试脚本，它与下面给出的脚本非常相似。使用以下版本的库

运行良好

"chai": "^3.5.0",
"chai-jquery": "^2.0.0",
"jquery": "^2.2.1",
"jsdom": "^8.1.0",
"mocha": "^2.4.5",
"react-addons-test-utils": "^0.14.7"

我使用jsdom修改了创建DOM的方法，这样脚本就可以运行以下版本的库。

"chai": "^4.1.2",
"chai-jquery": "^2.0.0",
"jquery": "^3.3.1",
"jsdom": "^11.6.2",
"mocha": "^5.0.1",
"react-addons-test-utils": "^15.6.2"

但是我收到如下错误：

 App
    1) "before each" hook for "renders something"


  0 passing (31ms)
  1 failing

  1) App
       "before each" hook for "renders something":
     TypeError: document.createElement is not a function
      at Object.renderIntoDocument (node_modules/react-dom/cjs/react-dom-test-utils.development.js:741:24)
      at renderComponent (test/test_helper.js:21:40)
      at Context.<anonymous> (test/components/app_test.js:8:17)

这是我的应用测试文件

import { renderComponent , expect } from '../test_helper';
import App from '../../src/components/App';

describe('App' , () => {
  let component;

  beforeEach(() => {
    component = renderComponent(App);
  });

  it('renders something', () => {
    expect(component).to.exist;
  });
});

这是我的测试帮助文件

import _$ from 'jquery';
import React from 'react';
import ReactDOM from 'react-dom';
import TestUtils from 'react-dom/test-utils';
import {JSDOM} from 'jsdom';
import chai, { expect } from 'chai';
import chaiJquery from 'chai-jquery';
import { Provider } from 'react-redux';
import { createStore } from 'redux';
import reducers from '../src/reducers';

global.document = new JSDOM('<!doctype html><html><body></body></html>');
global.window = global.document.window;
console.log(global.document);
global.navigator = global.window.navigator;
const $ = _$(window);

chaiJquery(chai, chai.util, $);

function renderComponent(ComponentClass, props = {}, state = {}) {
  const componentInstance =  TestUtils.renderIntoDocument(
    <div></div>
  );

  return $(ReactDOM.findDOMNode(componentInstance));
}

$.fn.simulate = function(eventName, value) {
  if (value) {
    this.val(value);
  }
  TestUtils.Simulate[eventName](this[0]);
};

export {renderComponent, expect};

我已经搜索过解决方案但无法找到任何突破。你们中的任何人都可以告诉我为什么TestUtils.renderIntoDocument无法创建一个简单的div。

注意：我故意将div置于TestUtils.renderIntoDocument内部，以便测试始终通过以进行调试。

Answer 1

通过以下方式更改JSDOM的行：

global.dom = new JSDOM('<!doctype html><html><body></body></html>');
global.window = dom.window;
global.document = dom.window.document;
global.navigator = global.window.navigator;

TypeError：document.createElement不是函数 - React，Mocha，JSDOM测试

1 个答案: