svelte/test/js/update.js

// this file will replace all the expected.js and expected-bundle.js files with
// their _actual equivalents. Only use it when you're sure that you haven't
// broken anything!
const fs = require('fs');
const glob = require('glob');

glob.sync('samples/*/_actual*', {cwd: __dirname}).forEach(file => {
	const actual = fs.readFileSync(`${__dirname}/${file}`, 'utf-8');
	fs.writeFileSync(`${__dirname}/${file.replace('_actual', 'expected')}`, actual);
});