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我想爲我的反應應用程序編寫單元測試。我寫的第一個單元測試是遵循反應測試錯誤。目標容器不是DOM元素
it('renders without crashing',() => {
const div = document.getElementById('root');
ReactDOM.render(<Index />, div);
});
不過,我得到了錯誤
Invariant Violation: _registerComponent(...): Target container is not a DOM element.
我不得不說,其實我寫的應用程序有沒有這樣的錯誤,如果我npm start
此運行錯誤只有當我用單元測試測試我的程序時才存在。我想知道如何解決這個問題?
這裏是index.js
文件根格渲染
import React from 'react';
import { Provider } from 'react-redux';
import { render } from 'react-dom';
import { Router, browserHistory } from 'react-router';
import routes from './routes';
import '../style/style.css';
import configurationStore from './store/configurationStore';
const store = configurationStore();
// TODO: Comments;
render (
<Provider store={store}>
<Router history={browserHistory} routes={routes}/>
</Provider>,
document.getElementById('root')
);
,這裏是我的html文件
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyDLjwDjIMWnBb8C6Nrc-38HcWfVK5nmVhM&libraries=places"></script>
<link href="https://fonts.googleapis.com/css?family=Roboto:300,400,500" rel="stylesheet">
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/latest/css/bootstrap.min.css">
<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/latest/css/bootstrap-theme.min.css">
<script src="https://cdn.auth0.com/js/lock/10.6/lock.min.js"></script>
<script src="https://apis.google.com/js/platform.js" async defer></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<title>React App</title>
</head>
<body>
<img alt="background image" src="http://www.viudigital.com/images/viu_bg_temp.jpg?crc=524745911" id="fullscreen" />
<div id="root"></div>
</body>
</html>
解決方案: 我發現解決這個錯誤的解決方案。要修復它,只需將我們要測試的組件包裝到根組件中即可。這是一個測試例子
test('Header component rendered properly',() => {
const tree = renderer.create(
<App>
<Header />
</App>
).toJSON();
expect(tree).toMatchSnapshot();
});
不,我試過之前,同樣的錯誤 – Darren
你可以嘗試文件附加到身體像這樣: '文件.body.appendChild(DIV)'。這將在'ReactDOM.render()' –
之前感謝您的幫助。我已經解決了這個錯誤 – Darren