我正在尝试在使用Webpack时测试带有Jest /酶的React组件。测试反应:目标容器不是DOM元素
我有一个非常简单的测试@
import React from 'react';
import { shallow } from 'enzyme';
import App from './App';
it('App',() => {
const app = shallow(<App />);
expect(1).toEqual(1);
});
它捡了相对组件:
import React, { Component } from 'react';
import { render } from 'react-dom';
// import './styles/normalize.css';
class App extends Component {
render() {
return (
<div>app</div>
);
}
}
render(<App />, document.getElementById('app'));
但是,运行jest
导致失败:
Invariant Violation: _registerComponent(...): Target container is not a DOM element.
有错误@
at Object.<anonymous> (src/App.js:14:48) at Object.<anonymous> (src/App.test.js:4:38)
测试文件的引用线4,它是<App />
的进口,并由此导致失败。堆栈跟踪说明App.js
的第14行是失败的原因 - 这只不过是来自react-dom
的渲染调用,这是我从来没有遇到过的挑战(应用程序从我的Webpack安装程序正确呈现)。
对于那些有兴趣(的WebPack代码):
module.exports = {
entry: './src/App',
output: {
filename: 'bundle.js',
path: './dist'
},
module: {
loaders: [
{
test: /\.js?$/,
exclude: /node_modules/,
loader: 'babel',
query: {
presets: ['react', 'es2015']
}
},
{
test: /\.css$/,
loader: 'style!css-loader?modules&importLoaders=1&localIdentName=[name]__[local]___[hash:base64:5]'
},
{
test: /\.scss$/,
loader: 'style!css-loader?modules&importLoaders=1&localIdentName=[name]__[local]___[hash:base64:5]!sass'
}
]
}
}
而且我package.json
:
{
"name": "tic-tac-dux",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"dev": "webpack-dev-server --devtool eval --progress --colors --inline --hot --content-base dist/",
"test": "jest"
},
"jest": {
"moduleNameMapper": {
"^.+\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/__mocks__/fileMock.js",
"^.+\\.(css|sass)$": "<rootDir>/__mocks__/styleMock.js"
}
},
"keywords": [],
"author": "",
"license": "ISC",
"devDependencies": {
"babel-core": "^6.17.0",
"babel-jest": "^16.0.0",
"babel-loader": "^6.2.5",
"babel-polyfill": "^6.16.0",
"babel-preset-es2015": "^6.16.0",
"babel-preset-react": "^6.16.0",
"css-loader": "^0.25.0",
"enzyme": "^2.4.1",
"jest": "^16.0.1",
"jest-cli": "^16.0.1",
"node-sass": "^3.10.1",
"react-addons-test-utils": "^15.3.2",
"react-dom": "^15.3.2",
"sass-loader": "^4.0.2",
"style-loader": "^0.13.1",
"webpack": "^1.13.2",
"webpack-dev-server": "^1.16.2"
},
"dependencies": {
"react": "^15.3.2",
"react-dom": "^15.3.2"
}
}
哦,如果有人会说,div元素没有被之前的加载脚本,这是我的index.html
:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>App</title>
</head>
<body>
<div id="app"></div>
<script src="/bundle.js"></script>
</body>
</html>
什么可能是雷纳斯对这个奇怪的渲染问题?一些新的Jest更新到15.0?
我得到了同样的错误: - 我与阿娃测试.. 请告诉我,我应该在哪里错了.. 出口默认类应用延伸元器件{ 渲染(){ 回报(
@BhavikKheni请创建新的问题,并在其中包含完整的代码以及错误和堆栈跟踪。 – biphobe