装饰器@classmethod
一、装饰器@classmethod
多个用例可能需要多次打开浏览器，装饰器@classmethod只打开一次浏览器。classmethod是python里的类方法，@是修饰符号。
1、setUpClass():
@classmethod
def setUpClass(cls):
2、tearDownClass():
@classmethod
def tearDownClass(cls):
示例：
from selenium import webdriver
from time import sleep
import unittest
class Login(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls.driver = webdriver.Chrome()
cls.driver.get("http://www.anenda.com")
cls.driver.implicitly_wait(30)
cls.driver.maximize_window()
sleep(2)
cls.driver.find_element_by_id("liger-textbox-user").send_keys("chen")
cls.driver.find_element_by_id("liger-textbox-pwd_old").clear()
cls.driver.find_element_by_id("liger-textbox-pwd").send_keys("chen")
cls.driver.find_element_by_id("go").click()
sleep(3)
def test01(self):
result1 = self.driver.find_element_by_xpath(".//*[@id=‘l-topmenu-r-bottm‘]/span[2]").text
print(result1)
result2 = "安恩达,欢迎您"
self.assertIn(result2,result1,msg="失败原因：%s中没有发现%s"%(result1,result2))
sleep(2)
def test02(self):
result1 = self.driver.find_element_by_id("hour").text
print(result1)
result2 = "2018年"
self.assertIn(result2,result1,msg="失败原因：%s中没有发现%s"%(result1,result2))
sleep(2)
@classmethod
def tearDownClass(cls):
cls.driver.quit()
if __name__ == ‘__main__‘:
unittest.main()