import * as assert from 'assert' ; import './main.svelte' ; export default function ( target ) { const warnings = [ ] ; const warn = console . warn ; console . warn = warning => { warnings . push ( warning ) ; } ; target . innerHTML = '<my-app foo=yes />' ; assert . deepEqual ( warnings , [ "<my-app> was created without expected prop 'bar'" ] ) ; console . warn = warn ; }