ant-design/components/breadcrumb/__tests__/router.test.js

import React from 'react';
import { Route, Switch, Link, withRouter, MemoryRouter } from 'react-router-dom';
import { Breadcrumb } from 'antd';
import { mount } from 'enzyme';

const Apps = () => (
  <ul className="app-list">
    <li>
      <Link to="/apps/1">Application1</Link>：<Link to="/apps/1/detail">Detail</Link>
    </li>
    <li>
      <Link to="/apps/2">Application2</Link>：<Link to="/apps/2/detail">Detail</Link>
    </li>
  </ul>
);

const breadcrumbNameMap = {
  '/apps': 'Application List',
  '/apps/1': 'Application1',
  '/apps/2': 'Application2',
  '/apps/1/detail': 'Detail',
  '/apps/2/detail': 'Detail',
};

const Home = withRouter((props) => {
  const { location, history } = props;
  const pathSnippets = location.pathname.split('/').filter(i => i);
  const extraBreadcrumbItems = pathSnippets.map((_, index) => {
    const url = `/${pathSnippets.slice(0, index + 1).join('/')}`;
    return (
      <Breadcrumb.Item key={url}>
        <Link to={url}>
          {breadcrumbNameMap[url]}
        </Link>
      </Breadcrumb.Item>
    );
  });
  const breadcrumbItems = [(
    <Breadcrumb.Item key="home">
      <Link to="/">Home</Link>
    </Breadcrumb.Item>
  )].concat(extraBreadcrumbItems);
  return (
    <div className="demo">
      <div className="demo-nav">
        <a onClick={() => history.push('/')}>Home</a>
        <a onClick={() => history.push('/apps')}>Application List</a>
      </div>
      <Switch>
        <Route path="/apps" component={Apps} />
        <Route render={() => <span>Home Page</span>} />
      </Switch>
      <Breadcrumb>
        {breadcrumbItems}
      </Breadcrumb>
    </div>
  );
});

describe('react router', () => {
  beforeAll(() => {
    jest.useFakeTimers();
  });

  afterAll(() => {
    jest.useRealTimers();
  });
  // https://github.com/airbnb/enzyme/issues/875
  it('react router 4', () => {
    const wrapper = mount(
      <MemoryRouter initialEntries={['/']} initialIndex={0}>
        <Home />
      </MemoryRouter>
    );
    expect(wrapper.find('BreadcrumbItem').length).toBe(1);
    expect(wrapper.find('BreadcrumbItem .ant-breadcrumb-link').at(0).text()).toBe('Home');
    wrapper.find('.demo-nav a').at(1).simulate('click');
    expect(wrapper.find('BreadcrumbItem').length).toBe(2);
    expect(wrapper.find('BreadcrumbItem .ant-breadcrumb-link').at(1).text()).toBe('Application List');
  });
});