我正在嘗試在使用Webpack時測試帶有Jest /酶的React組件。測試反應:目標容器不是DOM元素
我有一個非常簡單的測試@
import React from 'react';
import { shallow } from 'enzyme';
import App from './App';
it('App',() => {
const app = shallow(<App />);
expect(1).toEqual(1);
});
它撿了相對組件:
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,運行jest
導致失敗:
Invariant Violation: _registerComponent(...): Target container is not a DOM element.
有錯誤@
at Object.<anonymous> (src/App.js:14:48) at Object.<anonymous> (src/App.test.js:4:38)
測試文件的引用線4,它是<App />
的進口,並由此導致失敗。堆棧跟蹤說明App.js
的第14行是失敗的原因 - 這只不過是來自react-dom
的渲染調用,這是我從來沒有遇到過的挑戰(應用程序從我的Webpack安裝程序正確呈現)。
對於那些有興趣(的WebPack代碼):
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,如果有人會說,div元素沒有被之前的加載腳本,這是我的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>
什麼可能是雷納斯對這個奇怪的渲染問題?一些新的Jest更新到15.0?
我得到了同樣的錯誤: - 我與阿娃測試.. 請告訴我,我應該在哪裏錯了.. 出口默認類應用延伸元器件{ 渲染(){ 回報(
@BhavikKheni請創建新的問題,並在其中包含完整的代碼以及錯誤和堆棧跟蹤。 – biphobe