如何对unittest测试用例进行排序？

Question

我was given是一个类修饰器，用于在unittest中自动生成测试用例的编号，这就是修饰器：

def generate_test_numbers(test_class):
    counter = 1
    for method_name in dir(test_class):
        if not method_name.startswith('test_n_'):
            continue
        method = getattr(test_class, method_name)
        if not callable(method):
            continue
        new_method_name = method_name.replace('_n_', '_{:02d}_'.format(counter))
        counter += 1
        setattr(test_class, new_method_name, method)
        delattr(test_class, method_name)
    return test_class

我的问题是当我尝试在单元测试文件中运行类装饰器时：

import unittest
from generator import generate_test_numbers


@generate_test_numbers
class TestStringMethods(unittest.TestCase):

    def test_n_remove(self):
        print("1")

    def test_n_add(self):
        print("2")

    def test_n_c(self):
        print("3")

    def test_n_d(self):
        print("4")

    def test_n_e(self):
        print("5")

    def test_n_f(self):
        print("6")

    def test_n_g(self):
        print("7")


if __name__ == '__main__':
    suite = unittest.TestLoader().loadTestsFromTestCase(TestStringMethods)
    unittest.TextTestRunner(verbosity=2).run(suite)

我希望将test_n_remove作为第一个测试而不是最后一个：

test_01_add (__main__.TestStringMethods) ... 2
ok
test_02_c (__main__.TestStringMethods) ... 3
ok
test_03_d (__main__.TestStringMethods) ... 4
ok
test_04_e (__main__.TestStringMethods) ... 5
ok
test_05_f (__main__.TestStringMethods) ... 6
ok
test_06_g (__main__.TestStringMethods) ... 7
ok
test_07_remove (__main__.TestStringMethods) ... 1
ok