在Jest测试中,窗口对象来自哪里？

Question

我有一个简单的Jest测试:

describe('test', function() {
  beforeEach(function() {});
  it('test', function() {
    console.log(window.document); //a real or nearly real document
  });
});

我需要一些模块,例如bootstrap - 但看起来它没有任何东西可能提供一个窗口对象 - 上面有一个文档对象.

我的问题是 - 谁/什么提供这个窗口(和window.document)对象？窗口对象类似于浏览器窗口 - 尽管缺少一两种方法.但我不知道是谁提供它.我不太了解node.js和webpack(使用webpack构建测试)以了解从哪里开始.

它不是ReactDOM.是Jest吗？还是节点？

Answer 1

快速检查,我认为这是jsdom.

基于这篇博文:

它简单,标准和独立(基于JSDom并构建在Jasmine之上).

望着的package.json在开玩笑库,

"dependencies": {
    "chalk": "^1.1.1",
    "cover": "^0.2.9",
    "diff": "^2.1.1",
    "graceful-fs": "^4.1.3",
    "istanbul": "^0.4.2",
    "jest-environment-jsdom": "^12.0.2",
    "jest-environment-node": "^12.0.2",
    "jest-haste-map": "^12.0.2",
    "jest-jasmine1": "^12.0.2",
    "jest-jasmine2": "^12.0.2",
    "jest-mock": "^12.0.2",
    "jest-util": "^12.0.2",
    "json-stable-stringify": "^1.0.0",
    "lodash.template": "^4.2.4",
    "mkdirp": "^0.5.1",
    "optimist": "^0.6.1",
    "resolve": "^1.1.6",
    "sane": "^1.2.0",
    "which": "^1.1.1",
    "worker-farm": "^1.3.1"
  },