# from selenium import webdriver

# browser = webdriver.Firefox()
# browser.get('http://localhost:5000')
# assert browser.title == 'Welcome'

# x = browser.find_element_by_id('x-field')
# x.send_keys("3")
# y = browser.find_element_by_id('y-field')
# y.send_keys("4")

# btn = browser.find_element_by_id('calc-button')
# btn.click()

# result = browser.find_element_by_id('result')
# assert result.text == "7"