import * as assert from 'assert' ; import CustomElement from './main.svelte' ; export default function ( target ) { new CustomElement ( { target } ) ; assert . equal ( target . innerHTML , '<custom-element></custom-element>' ) ; const el = target . querySelector ( 'custom-element' ) ; const button = el . shadowRoot . querySelector ( 'button' ) ; assert . ok ( button instanceof customElements . get ( 'custom-button' ) ) ; }