.window.setSize() 建议编辑

                    .window.setSize(width, height, [callback])
                

module.exports = {
  'set current window size': function (browser) {
     browser.window.setSize(1024, 768, function (result) {
       console.log('window resized successfully');
     });
  },

  'set current window size using ES6 async/await': async function (browser) {
     await browser.window.setSize(1024, 768);
  }
}