javascript - React-Redux/Jest 不变违规 : Could not find "store"

Question

我设置了一个简单的测试文件，几乎与 create-react-app 使用的文件相同:

App.test.js

import React from 'react';
import ReactDOM from 'react-dom';
import { App } from './App';

it('renders without crashing', () => {
  const div = document.createElement('div');
  ReactDOM.render(<App />, div);
});

当我运行 yarn test我不断收到此错误消息:

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

我已经尝试在我的 App.js 文件中进行单独的导出并导入非 Redux 组件，但我仍然无法让它工作。这是我涉及的另外两个文件:

App.js

import React, { Component } from 'react';
import axios from 'axios';
import { connect } from 'react-redux';

import TableList from './containers/table_list';
import Header from './components/header';
import Footer from './components/footer';

import './style/App.css';

// use named export for unconnected component (for tests)
export class App extends Component {
  constructor(props) {
    super(props);

    this.state = {
      recentUsers: [],
      allTimeUsers: []
    }
  }

  componentWillMount() {
    axios.all([this.fetchRecentUsers(), this.fetchAllTimeUsers()])
      .then(axios.spread((recentUsers, allTimeUsers) => {
        this.setState({ recentUsers: recentUsers.data, allTimeUsers: allTimeUsers.data });
    }))
      .catch((error) => {
        console.log(error)
      });
  }

  fetchRecentUsers() {
    return axios.get(RECENT);
  }

  fetchAllTimeUsers() {
    return axios.get(ALLTIME);
  }

  render() {
    return (
      <div>
        <Header />
          <div className="container">
            <TableList users={this.state.recentUsers} />
          </div>
        <Footer />
      </div>
    )
  }
}

const mapStateToProps = state => (
  { recentUsers: state.recentUsers, allTimeUsers: state.allTimeUsers }
)

// use default export for the connected component (for app)
export default connect(mapStateToProps)(App);

index.js

import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import { createStore } from 'redux';

import rootReducer from './reducers/index';
import App from './App';
import './style/index.css';

const store = createStore(rootReducer);

ReactDOM.render(
  <Provider store={store}>
    <App />
  </Provider>, document.getElementById('root'));

我在这里忽略了什么？该应用程序可自行正常运行，但我终究无法弄清楚测试失败的原因。

Answer 1

使用您提交的代码，您应该不会出现您指定的错误。为了在不使用 Redux 装饰您的组件的情况下进行测试，您希望您的测试像这样导入您的 App 组件:

import { App } from './App'

你已经做到了!但是，您的测试输出看起来像您在某些时候确实有这样的结果:

import App from './App'

所以再次检查，确保您保存了测试文件等...