import * as assert from 'assert'; import CustomElement from './main.html'; export default function (target) { new CustomElement({ target }); assert.equal(target.innerHTML, ''); const el = target.querySelector('custom-element'); const widget = el.shadowRoot.querySelector('my-widget'); const [p1, p2] = widget.shadowRoot.querySelectorAll('p'); assert.equal(p1.textContent, '3 items'); assert.equal(p2.textContent, 'a, b, c'); el.items = ['d', 'e', 'f', 'g', 'h']; assert.equal(p1.textContent, '5 items'); assert.equal(p2.textContent, 'd, e, f, g, h'); }