python自动化测试selenium核心技术处理弹框_自动化怎么判断页面有没有alert

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from selenium import webdriver

from time import sleep

from selenium.webdriver.support.wait import WebDriverWait

from selenium.webdriver.support import expected_conditions as ec

class TestWaitCondition(object):

    def setup(self):

        self.driver = webdriver.Chrome()

        self.driver.get(<a rel="external nofollow" href="https://sahitest.com/demo/">https://sahitest.com/demo/</a>)

    def test_alert(self):

        #点页面上的Alert Test

        self.driver.find_element_by_xpath("/html/body/table/tbody/tr/td[3]/a[1]").click()

        #鼠标点击页面中“Click For Alert”按钮

        self.driver.find_element_by_name("b1").click()

         wait = WebDriverWait(self.driver,2)

        #等待并判断警告框是否存在

        wait.until(ec.alert_is_present())

        #切换到alert页面

        alert = self.driver.switch_to.alert

        #获取并打印警告框中文本

        print(alert.text)

        #点弹出警告框中的确定

        alert.accept()

        self.driver.quit()

    def test_confirm(self):

        #点击Confirm Page链接打开页面

        self.driver.find_element_by_xpath("/html/body/table/tbody/tr/td[3]/a[2]").click()

        #点击Click For Confirm按钮，弹出确认提示框

        self.driver.find_element_by_name("b1").click()

        #切换到警告框

        confirm=self.driver.switch_to.alert

        #获取警告框提示信息并打印

        print(confirm.text)

        #点确定

        # confirm.accept()

        sleep(2)

        #点取消

        confirm.dismiss()

        sleep(2)

        self.driver.quit()

    def test_prompt(self):

        # 点击Prompt Page链接打开页面

        self.driver.find_element_by_xpath("/html/body/table/tbody/tr/td[3]/a[3]").click()

        #点击Click For Prompt按钮，弹出确认提示框

        self.driver.find_element_by_name("b1").click()

        sleep(2)

        #切换到提示框

        prompt = self.driver.switch_to.alert

        #获取提示框中文本并打印

        print(prompt.text)

        #提示框中输入文本test prompt

        prompt.send_keys("test prompt")

        # 点确定

        prompt.accept()

        sleep(2)

        #点取消

        # prompt.dismiss()

        self.driver.quit()