TypeError: setUpClass() missing 1 required positional argument: ‘cls‘怎么解决？-Toy模板网

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import unittest,time
from selenium import webdriver

class testLogin(unittest.TestCase):
    def setUpClass(cls) -> None:
        cls.driver = webdriver.Chrome()
        cls.driver.maximize_window()
        cls.driver.implicitly_wait(10)
        cls.driver.get('https://www.baidu.com/')

    def tearDownClass(cls) -> None:
        cls.driver.quit()
       
    def setUp(self) -> None:
        self.driver.refresh()

    def tearDown(self) -> None:
        pass

    def test_usernameNull(self):
        #用户名为空
        login_operation(self.driver,'','123456')
        time.sleep(0.5)

typeerror: setupclass() missing 1 required positional argument: 'cls,selenium,python,selenium

解决方法：

分别在 setUpClass(cls) 和 tearDownClass(cls) 前面加 @classmethod文章来源地址https://www.toymoban.com/news/detail-533060.html

import unittest,time
from selenium import webdriver

class testLogin(unittest.TestCase):
    @classmethod
    def setUpClass(cls) -> None:
        cls.driver = webdriver.Chrome()
        cls.driver.maximize_window()
        cls.driver.implicitly_wait(10)
        cls.driver.get('https://www.baidu.com/')

    @classmethod
    def tearDownClass(cls) -> None:
        cls.driver.quit()

    def setUp(self) -> None:
        self.driver.refresh()

    def tearDown(self) -> None:
        pass

    def test_usernameNull(self):
        #用户名为空
        login_operation(self.driver,'','123456')
        time.sleep(0.5)
        assertUserNameNull(self.driver)

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