Question

我正在尝试测试redux连接组件。该组件在resize事件上更改其属性。

我想用酶挂载我的DatePicker组件，调度resize事件，并测试我的DatePicker的prop值IS_DESKTOP_VIEWPORT === true，因此，我的DatePicker的状态也发生了变化。

但是我无法访问DatePicker的状态，因为如果包装器组件不是root用户，则酶不允许您访问状态：

console.log(wrapper.find('DatePicker').state())
// ReactWrapper::state() can only be called on the root

我已经尝试将连接的DatePicker包装在提供商中，如文档所示，以及直接挂载它，但将商店作为道具传递。这些方法似乎都不允许我将DatePicker称为根组件，因此这些方法都不允许我获取组件的状态。

以下是我的尝试：这些控制台日志的输出位于：https://gist.github.com/gecko25/56fb14154585a2d06697c399685c9111

import React from 'react';
import { Provider } from 'react-redux';
import PropTypes from 'prop-types';
import { mount } from 'enzyme';
import configureDataStore from '%SRC%/store/configure';
import { windowResize } from '%CONSTANTS%/store/actions';
import  ConnectedDatePicker, { DatePicker }  from './DatePicker';

const DESKTOP = 1025;

describe('calendar open and closes', () => {

    test('connected attempt #1', ()=>{

        const store = configureDataStore();

        const options = {
          context: { store },
          childContextTypes: { store: PropTypes.object }
        }

        const wrapper = mount(<ConnectedDatePicker store={store}/>)

        store.dispatch(windowResize(DESKTOP));

        console.log('state-->', wrapper.state()) // {}
        console.log('props-->', wrapper.props()) // Doesn't include all my component specific props
        console.log(wrapper.find('DatePicker').props()) // Prints all props as expected
        console.log(wrapper.find('DatePicker').state()) // Error

        console.log('--------------------------')

    })

    test('connected attempt #2', () => {

        const store = configureDataStore();

        const options = {
          context: { store },
          childContextTypes: { store: PropTypes.object }
        }

        const wrapper = mount(<ConnectedDatePicker/>, options)

        store.dispatch(windowResize(DESKTOP));


        console.log('state-->', wrapper.state()) // {}
        console.log('props-->', wrapper.props()) // Doesn't include all my component specific props
        console.log(wrapper.find('DatePicker').props()) // Prints all props as expected
        console.log(wrapper.find('DatePicker').state()) // Error

    });

    test('connected attempt #3', () => {

        const store = configureDataStore();

        const wrapper = mount(<Provider store={store}><ConnectedDatePicker/></Provider>)

        store.dispatch(windowResize(DESKTOP));

        console.log('state-->', wrapper.state()) // null
        console.log('props-->', wrapper.props()); // Doesn't include all my component specific props
        console.log(wrapper.find('DatePicker').props()) // Prints all props as expected
        console.log(wrapper.find('DatePicker').state()) // Error
        console.log('--------------------------')

    });
});

Answer 1

wrapper.find('DatePicker').instance().state应该对你有用：）

Answer 2

操作如下：

确保您的DatePicker：

export class DatePicker... // without export it would not work in your test file
export default connect(...)(DatePicker);

获得状态的几种方法：

如果您这样做：

const wrapper = shallow(<connectedDatePicker {...props} />)

您需要两次潜入DatePicker才能获得状态：

expect(wrapper.dive().dive().state()).toEqual({...})

如果您这样做：

const wrapper = shallow(<DatePicker {...props} />);

您不需要潜水即可获得状态。

expect(wrapper.state()).toEqual({...})

AIRBNB开发人员在哪里建议我这样做：
要获取包装器状态，不建议使用wrapper.instance().state，
您最好使用wrapper.state()

Answer 3

以下对我有用：

let component = shallow(<ConnectedDatePicker store={store}/>).dive().dive();
it("The description", () => {
     expect(component.state('StateName')).toEqual('something');
});

获取与酶连接到redux的子组件的状态

3 个答案: