remix-project/test-browser/commands/editorScroll.js

const EventEmitter = require('events')

// fix for editor scroll
class ScrollEditor extends EventEmitter {
  command (direction, numberOfTimes) {
    const browser = this.api

    browser.waitForElementPresent('.ace_text-input')
    for (let i=0; i<numberOfTimes; i++){
      if (direction.toLowerCase() === 'up') browser.sendKeys('.ace_text-input', browser.Keys.ARROW_UP)
      if (direction.toLowerCase() === 'down') browser.sendKeys('.ace_text-input', browser.Keys.ARROW_DOWN)
    }
    browser.perform((done) => {
      done()
      this.emit('complete')
    })
    return this
  }
}

module.exports = ScrollEditor