Python unittest装饰器实现原理及代码

import unittest

class Test(unittest.TestCase):

  @classmethod
  def setUpClass(cls) -> None:
    print("-----开始执行用例-----")

  def setUp(self) -> None:
    print("执行用例准备动作...")
  def test01(self):
    print("第一条用例正在执行...")
  def test02(self):
    print("第二条用例正在执行...")
  def tearDown(self) -> None:
    print("用例执行完结动作...")
    
  @classmethod
  def tearDownClass(cls) -> None:
    print("-----用例执行结束-----")
    
if __name__ == '__main__':
  unittest.main()

#执行结果如下：
"""
-----开始执行用例-----
执行用例准备动作...
第一条用例正在执行...
用例执行完结动作...
执行用例准备动作...
第二条用例正在执行...
用例执行完结动作...
-----用例执行结束-----
"""

from selenium import webdriver
import unittest
from time import sleep

class DymLogin(unittest.TestCase):

  @classmethod
  def setUpClass(cls) -> None:
    """
    所有的用例只需要执行一次打开浏览器操作
    """
    print("Test start...")
    cls.dr = webdriver.Chrome()
    cls.dr.get("http://www.duoyoumi.com/")
    cls.dr.implicitly_wait(10)
    cls.dr.maximize_window()
    cls.dr.find_element_by_class_name("login").click()
    sleep(1)

  @classmethod
  def tearDownClass(cls) -> None:
    sleep(2)
    cls.dr.quit()
    print("Test end...")

  def test_login01(self):
    """
    账号密码都为空
    """
    self.dr.find_element_by_name("loginName").clear()
    self.dr.find_element_by_name("loginPwd").clear()
    self.dr.find_element_by_xpath('//*[@id="loginForm"]/div/div/div/div[2]/div[1]/div[2]').click()   #登录操作
    TipsMsg = self.dr.find_element_by_class_name("promptLogin").text
    self.assertEqual(TipsMsg,"-请输入登录账号！",msg="Test_login01 login exception")

  def test_login02(self):
    """
    账号正确，密码为空
    """
    self.dr.find_element_by_name("loginName").clear()
    self.dr.find_element_by_name("loginPwd").clear()
    self.dr.find_element_by_name("loginName").send_keys("17779828887")
    self.dr.find_element_by_xpath('//*[@id="loginForm"]/div/div/div/div[2]/div[1]/div[2]').click() # 登录操作
    TipsMsg = self.dr.find_element_by_class_name("promptLogin").text
    self.assertEqual(TipsMsg, "-请输入密码！", msg="Test_login02 login exception")

  def test_login03(self):
    """
    账号密码都正确
    """
    self.dr.find_element_by_name("loginName").clear()
    self.dr.find_element_by_name("loginPwd").clear()
    self.dr.find_element_by_name("loginName").send_keys("17779828887")
    self.dr.find_element_by_name("loginPwd").send_keys("zy295240")
    self.dr.find_element_by_xpath('//*[@id="loginForm"]/div/div/div/div[2]/div[1]/div[2]').click()   #登录操作
    sleep(2)
    TipsMsg = self.dr.find_element_by_css_selector("#w_nav_temp_1000 > div.fr.dl > a:nth-child(4)").text
    self.assertEqual(TipsMsg,"[退出]",msg="Test_login03 login exception")

if __name__ == '__main__':
  unittest.main()
#执行结果如下
"""
Test start...
...
Test end...
----------------------------------------------------------------------
Ran 3 tests in 25.253s

OK
"""

import unittest

class Test(unittest.TestCase):

  def setUp(self) -> None:
    print("---start---")

  def tearDown(self) -> None:
    print("---end---")

  def testbbb(self):
    print("case testbbb")

  @unittest.skip("testaaa 被跳过")
  def testaaa(self):
    print("case testaaa")

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

# 结果如下
s.
----------------------------------------------------------------------
Ran 2 tests in 0.000s
OK (skipped=1)

---start---
case testbbb
---end---