import * as assert from 'assert'; import './main.html'; export default function (target) { target.innerHTML = ` slotted `; const el = target.querySelector('custom-element'); const div = el.shadowRoot.children[0]; const [slot0, slot1] = div.children; assert.equal(slot0.assignedNodes()[1], target.querySelector('strong')); assert.equal(slot1.assignedNodes().length, 0); }