const assert = require('assert'); const fs = require('fs'); const path = require('path'); const css = fs.readFileSync(path.join(__dirname, '..', 'shared', 'popup', 'popup.css'), 'utf8'); assert.match(css, /select\s*\{[^}]*appearance:\s*none/, 'popup select must hide the native arrow'); assert.match(css, /select option\s*\{[^}]*background/, 'popup options must use the extension surface'); console.log('browser extension popup select style test passed');