操作HTML5存储对象

读取HTML5的localStorahe和sessionStorage的内容，并删除存储的内容。

#!usr/bin/env python  
#-*- coding:utf-8 -*-  
#操作HTML5存储对象

from selenium import webdriver
import unittest,time

class Html5Storage(unittest.TestCase):
    def setUp(self):
        self.driver = webdriver.Chrome()

    def test_Html5localStorage(self):
        localStorageUrl = 
            'http://www.w3school.com.cn/tiy/loadtext.asp?f=html5_webstorage_local'
        self.driver.get(localStorageUrl)
        time.sleep(2)
        #通过JavaScript语句，获取存储在localStorage中的lastname的值
        lastName = self.driver.execute_script('return localStorage.lastname')
        print('lastName:',lastName)
        self.assertEqual('Gates',lastName)
        #通过JavaScript语句'localStorage.clear();'清除所有存储在localStorage中的存储值
        self.driver.execute_script('localStorage.clear();')
        #清除存储在localStorage中的存储值后再次查看lastname的值
        last_Name = self.driver.execute_script('return localStorage.lastname')
        self.assertEqual(None,last_Name)

    def test_Html5SessionStorage(self):
        sessionStorageUrl = 
            "http://www.w3school.com.cn/tiy/loadtext.asp?f=html5_webstorage_session"
        self.driver.get(sessionStorageUrl)
        time.sleep(2)
        self.driver.find_element_by_tag_name('button').click()
        time.sleep(2)
        clickCpunt = self.driver.execute_script('return sessionStorage.clickcount')
        print('clickCpunt:',clickCpunt)
        self.assertEquals(1,int(clickCpunt))
        self.driver.execute_script('sessionStorage.clear();')
        click_count = self.driver.execute_script('return sessionStorage.clickcount')
        self.assertEqual(None,click_count)

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

if __name__ == '__main__':
    unittest.main()