reactjs - 使用 enzyme 在 react 测试中找到渲染子组件的数量？

Question

我花了一整天的时间深入研究 Enzyme 文档并开始掌握基础知识。

我正在循环访问 Redux 存储中的一些数据来渲染这些嵌套的 <BudgetWidgetCard />组件到我的父组件中并希望确保 X其中一些正在渲染到页面上。

组件示例

  <div>
    <main className="col-sm-9 offset-sm-3 col-md-10 offset-md-2 pt-3">
      <h1 name='main-header-title'>{metaProperties.pageTitle}</h1>
      {budgetWidgets.map((widget, i) => {
        return <BudgetWidgetCard className='budget-widget' title={widget} key={i} state={this.props} />
      })}
</main>
</div>

测试方法

  it('+++renders the budget widget items correctly', () => {
      console.log(wrapper.children().children().filter('budget-widget').length)
      console.log(wrapper.find(<BudgetWidgetCard />).forEach(child => {
        console.log(child.text())
      }))
    })

我不喜欢调用children().children()的想法...似乎紧密耦合，但也许这就是可行的方法。我的最终目标是简单地说 componentA 的浅层渲染有X数量<BudgetWidgetCards />

我得到以下输出:

Review Current Budget<BudgetWidgetCard /><BudgetWidgetCard /><BudgetWidgetCard /><BudgetWidgetCard />Add A New Budget Item<ReduxForm /><BudgetTable />

当使用以下内容时:

  wrapper.children().forEach(child=> {
    console.log(child.text())
  })

测试文件

import React from 'react'
import { shallow, mount } from 'enzyme';
import renderer from 'react-test-renderer'
// import configureStore from 'redux-mock-store'
import {Provider} from 'react-redux'
import {createStore} from 'redux'
import { MemoryRouter as Router, withRouter } from 'react-router-dom';
import { configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
import { configureStore } from '../src/configuration/store';
configure({ adapter: new Adapter() });

/**
BUDGET COMPONENTS
**/
import Budget from '../src/Budget/components/Budget';
import BudgetWidgetCard from '../src/Budget/components/Budget';

let mainHeaderTitle = 'Review Current Budget';
const store = configureStore();
const wrapper = shallow(<Budget />);

// Snapshot for Budget React Component
describe('>>>B U D G E T --- Snapshot',()=>{
  it('+++capturing Snapshot of Budget', () => {
      const wrapper = shallow(<Budget />);
      expect(wrapper).toMatchSnapshot();
    })
});

describe('>>>B U D G E T --- Elements Getting Rendered Correctly',()=>{
  it('+++correct title is getting rendered as header', () => {
      expect(wrapper.find('h1[name="main-header-title"]').text()).toEqual(mainHeaderTitle);
    })

  it('+++renders the budget widget items correctly', () => {
      expect(wrapper.children().find(BudgetWidgetCard).length).toE‌​qual(4)
    })
});

Answer 1

如果导入您希望渲染 x 次的组件，您可以执行以下操作:

expect(wrapper.find(BudgetWidgetCard)).to.have.length(x);

http://airbnb.io/enzyme/docs/api/ReactWrapper/find.html