用猴子补丁的方式解决 python unittest按定义的顺序执行用例

import unittest

# 用猴子补丁的方式解决 testcase 按定义的顺序执行用例
from unittest.loader import TestLoader

# 自定义一个getTestCaseNames方法， 替换TestLoader中的getTestCaseNames方法
def getTestCaseNames(self, testCaseClass):
    def isTestMethod(attrname, testCaseClass=testCaseClass,
                     prefix=self.testMethodPrefix):
        return attrname.startswith(prefix) and 
               callable(getattr(testCaseClass, attrname))

    testFnNames = []
    for testFnName in testCaseClass.__dict__:
        if isTestMethod(testFnName):
            testFnNames.append(testFnName)
    return testFnNames


# 替换TestLoader中的getTestCaseNames方法
TestLoader.getTestCaseNames = getTestCaseNames

class Test(unittest.TestCase):
    def setUp(self) -> None:
        print('setup')

    def test_b(self):
        print('test_b')

    def test_02(self):
        print('test-02')
      
    def test_01(self):
        print('test-01')

    def test_a(self):
        print('test-a')

    def meth(self):
        print('meth')


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