不使用加载测试unittest.TestLoader（）在我的unittest.TestCase班

Question

我有一个测试作为unittest.TestCase我用了个装饰工。在

import unittest
from selenium import webdriver
import sys

SAUCE_USERNAME = 'xxx'
SAUCE_ACCESS_KEY = 'xxx'
sauce = SauceClient(SAUCE_USERNAME, SAUCE_ACCESS_KEY)
browsers = [{"platform": "Mac OS X 10.9",
     "browserName": "chrome",
     "version": "31"},
    {"platform": "Windows 8.1",
     "browserName": "internet explorer",
     "version": "11"}]


def on_platforms(platforms):
    def decorator(base_class):
        module = sys.modules[base_class.__module__].__dict__
        for i, platform in enumerate(platforms):
            d = dict(base_class.__dict__)
            d['desired_capabilities'] = platform
            name = "%s_%s" % (base_class.__name__, i + 1)
            module[name] = new.classobj(name, (base_class,), d)
    return decorator

@on_platforms(browsers)
class MyTestSuite(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.desired_capabilities['name'] = cls.id()
        sauce_url = "http://%s:%s@ondemand.saucelabs.com:80/wd/hub"
        cls.driver = webdriver.Remote(
        desired_capabilities=cls.desired_capabilities,
        command_executor=sauce_url %     (SAUCE_USERNAME,SAUCE_ACCESS_KEY))
    cls.driver.implicitly_wait(30)

def test_1from_sauce(self):
    pass

def test_2from_sauce(self):
    pass

@classmethod
def tearDownClass(cls):
    cls.driver.quit()

if __name__ == "__main__":
     suite =unittest.TestLoader().loadTestsFromTestCase(Registration)
     unittest.TextTestRunner(verbosity=1).run(suite)

问题是，当我使用CLI运行此代码时，会出现以下错误：

^{pr2}$

当我注释掉@on_platforms修饰符时，这个错误就消失了。同样，当我使用这个装饰器时，MyTestSuite type is "Nonetype"并且当我删除它时，MyTestSuite的类型将变为"type"。问题从何而来？在

Answer 1

您的装饰器正在更改它所装饰的对象的签名。格雷厄姆·邓普尔顿对这个问题作了极其详细的解释。尝试使用pypi中的Decorator来装饰您的装饰器，使其保留所装饰内容的签名。在