JestJS->不变违规:无法找到“存储"在"Connect(Portfolio)"的上下文中或在其道具中的意思是: [英] JestJS -> Invariant Violation: Could not find "store" in either the context or props of "Connect(Portfolio)"

问题描述

完整的错误消息:

不变违反:在"Connect(Portfolio)"的上下文或道具中找不到"store".将根组件包装在中，或者将存储"作为道具明确传递给"Connect(Portfolio)".

Invariant Violation: Could not find "store" in either the context or props of "Connect(Portfolio)". Either wrap the root component in a , or explicitly pass "store" as a prop to "Connect(Portfolio)".

不确定我的应用程序正在运行时为什么在Jest测试中会出现此错误，并且可以通过调度操作更改状态.

Not sure why I'm getting this error in my Jest tests as my app is working and I can change my state with dispatch actions.

import React from 'react'
import ReactDOM from 'react-dom'
import { createStore, applyMiddleware, compose } from 'redux'
import { Provider } from 'react-redux'
import thunk from 'redux-thunk'
import reducer from './reducer'
import App from './App'

const element = document.getElementById('coinhover');

const store = createStore(reducer, compose(
    applyMiddleware(thunk),
    window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
));

ReactDOM.render(
    <Provider store={ store }>
        <App />
    </Provider>, element);

投资组合组件

import React from 'react'
import { connect } from 'react-redux'
import SocialMediaFooter from '../common/SocialMediaFooter'
import AssetsTable from '../assetsTable/AssetsTable'
import local_coins from '../../coins.json'
import * as api from '../../services/api'

const mapStateToProps = ({ portfolio }) => ({
    portfolio
});

let localCoins = local_coins;

class Portfolio extends React.Component {
    constructor(props) {
        super(props)
        this.state = {
            loading: true,
            assets: props.portfolio,
            total: 0
        };
    }

    componentDidMount() {
        this.setState({ loading: false });
    }

    render() {
        const assets = this.state.assets;
        const total  = this.state.total;

        return (
            <div className="app-bg">
                <section className="portfolio">
                    <header>
                        <h1><span className="plus">+</span>COINHOVER</h1>
                        <h2>Watch your cryptocurrency asset balances in once place.</h2>
                        <em className="num">${ total }</em>
                    </header>
                    { this.state.loading ? (
                        <div className="loading">
                            <div className="loader"></div>
                            <span>Loading coin data...</span>
                        </div>
                    ) : (
                        <AssetsTable assets={ assets }/>
                    )}
                    <SocialMediaFooter />
                </section>
            </div>
        )
    }
}

export default connect(mapStateToProps, null)(Portfolio)

推荐答案

对于错误消息，您需要确保对连接的组件的测试可以实际访问商店实例.因此，在测试代码中，您还应该使用<Provider store={store}><ConnectedPortfolio /></Provider>或<ConnectedPortfolio store={store} />.或者，您可以分别导出普通的Portfolio组件并进行测试，而不是连接的版本.

Per the error message, you need to make sure that tests for a connected component can actually access a store instance. So, in your test code, you should also use <Provider store={store}><ConnectedPortfolio /></Provider>, or <ConnectedPortfolio store={store} />. Or, you can export your plain Portfolio component separately, and test that, not the connected version.

有关详细信息，请参见有关测试的Redux文档，以及 Redux测试方法中的文章在我的反应/Redux链接列表中.

See the Redux docs on testing for more info, as well as the articles on Redux testing approaches in my React/Redux links list.

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