text: 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.equal(warnings.length, 1);
  	assert.equal(warnings[0], `<my-app> was created without expected prop 'bar'`);
  
  	console.warn = warn;
  }