如何使用jest测试Web组件(lit-element)

npm install --save-dev jest

import { html, fixture, expect } from '@open-wc/testing';
import '../your-component.js';

describe('your-component', () => {
  it('renders correctly', async () => {
    const el = await fixture(html`
      <your-component></your-component>
    `);
    
    expect(el).shadowDom.to.equalSnapshot();
  });
  
  it('sets property correctly', async () => {
    const el = await fixture(html`
      <your-component .yourProperty=${'yourValue'}></your-component>
    `);
    
    expect(el.yourProperty).to.equal('yourValue');
  });
  
  // 更多测试用例...
});

npx jest