等待alert出现，切换到alert， 关闭alert， 判断alert已经消失

 

from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
       
......

        # 等待弹窗出现
        WebDriverWait(self.driver, 3).until(EC.alert_is_present())
        alert = self.driver.switch_to.alert
        assert alert.text == expect
        alert.accept()
        # 等待弹窗消失
        WebDriverWait(self.driver, 3).until_not(EC.alert_is_present())