获取css的属性值

 # -*- coding:utf-8 -*-

 """
 在元素上执行双击操作
 """

 from selenium import webdriver
 from selenium.webdriver import ActionChains
 import unittest

 class Actions_Element_Click(unittest.TestCase):
     def setUp(self):
         self.driver = webdriver.Firefox()
         self.driver.get(r'F:\电子书\selenium\Selenium Testing Tools Cookbook(中文)\demo\DoubleClickDemo.html')

     def test_element_double_click(self):
         driver = self.driver
         message = driver.find_element_by_id('message')

         # message.value_of_css_property('font-size'): 获取css的属性值
         self.assertEqual('14px', message.value_of_css_property('font-size'))
         action_chains = ActionChains(driver)
         action_chains.double_click(message).perform()       #鼠标双击动作

         self.assertEqual('20px', message.value_of_css_property('font-size'))

     def tearDown(self):
         self.driver.quit()