第二种方式，修改python unittest的执行顺序，使用猴子补丁

import time
import unittest
from unittest.main import TestProgram
from app.utils.utils_ydf import LogManager


class CustomTestCase(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.logger = LogManager(‘unittest用例的日志‘).get_logger_without_handlers()
    @classmethod
    def tearDownClass(cls):
        time.sleep(1)
        cls.logger.debug(‘---------------------------------所有用例完成-----------------------------‘)
        time.sleep(200000)

    def tearDown(self):
        time.sleep(0.1)

    def setUp(self):
        time.sleep(0.1)


class CustomLoader(unittest.TestLoader):
    def getTestCaseNames(self, testCaseClass):
        """Return a sorted sequence of method names found within testCaseClass
        """

        def isTestMethod(attrname, testCaseClass=testCaseClass,
                         prefix=self.testMethodPrefix):
            return attrname.startswith(prefix) and                    callable(getattr(testCaseClass, attrname))

        testFnNames = list(filter(isTestMethod, dir(testCaseClass)))
        if self.sortTestMethodsUsing:
            testFnNames.sort(key=lambda fun_name: getattr(testCaseClass, fun_name).__code__.co_firstlineno)
        return testFnNames


custom_loader = CustomLoader()


class CustomTestTestProgram(TestProgram):
    def __init__(self, *args, testLoader=custom_loader, **kwargs):
        super().__init__(*args, testLoader=testLoader, **kwargs)


def patch_unittest():
    unittest.TestCase = CustomTestCase
    unittest.defaultTestLoader = custom_loader
    unittest.main = CustomTestTestProgram


if __name__ == ‘__main__‘:
    patch_unittest()


    class _Test(unittest.TestCase):
        def test_3(self):
            print(1)

        def test_2(self):
            print(2)

        def test_1(self):
            print(3)


    unittest.main()