driving-the-browser-in-e2e-tests.js

    const digit4Element = await driver.findElement(By.css('.digit-4'))
    const digit2Element = await driver.findElement(By.css('.digit-2'))
    const operatorMultiply = await driver.findElement(By.css('.operator-multiply'))
    const operatorEquals = await driver.findElement(By.css('.operator-equals'))

    await digit4Element.click()
    await digit2Element.click()
    await operatorMultiply.click()
    await digit2Element.click()
    await operatorEquals.click()

    await retry(async () => {
      const displayElement = await driver.findElement(By.css('.display'))
      const displayText = await displayElement.getText()

      expect(displayText).to.equal('84')
    })