Python3.x 如何将 WebDriver 传输到导入的测试

主模块测试和导入的测试必须在同一浏览器窗口中执行.但有些事情出了问题:

100

import unittest
from selenium import webdriver
from selenium.webdriver.chrome.service import Service
import import_test_set

class MainTests(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.url = "https://www.google.com/"
        s = Service("../chromedriver/chromedriver")
        cls.driver = webdriver.Chrome(service=s)
        cls.driver.maximize_window()

    def test_00_01_open_site(self):
        print('test_00_01_open_site')

        self.driver.get(self.url)
        self.assertIn("Google", self.driver.title)

    def test_00_02_imported_tests(self):
        print('test_00_02_imported_tests')

        imported_tests = import_test_set.ImportTestSet()
        imported_tests.set_driver(self.driver)
        suite = unittest.TestLoader().loadTestsFromModule(import_test_set)

        result = unittest.TextTestRunner(verbosity=2).run(suite)
        self.assertEqual(result.failures, [])

100

import unittest
from selenium.webdriver.common.by import By


class ImportTestSet(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.i_wait = 5

    def set_driver(self, driver):
        self.driver = driver

    def test_00_02_01_enter(self):
        print('test_00_02_01_enter')

        self.driver.implicitly_wait(self.i_wait)
        a_enter = self.driver.find_element(By.LINK_TEXT, 'Log in')
        a_enter.click()
        page_title = self.driver.title
        self.assertEqual(page_title, 'Google')
   
    def runTest(self):
        pass

执行时，我收到一个错误:

文件"C:\USERS...\IMPORT_TEST_set.py"，第17行，位于 TEST_00_02_01_ENTER Self.driver.IMPLICLY_WAIT(selfI._Wait)AttributeError:‘ImportTestSet’对象没有属性‘DRIVER’

我不明白为什么司机不能通过进口考试. 代码中有什么错误？