如何在setUpClass中使python单元测试失败？
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How to fail a python unittest in setUpClass?
提问by Alex
I am doing some unittests with python and some pre-test checks in setUpClass. How can I throw a unitest-failwithin the setUpClass, as the following simple example:
我正在用 python 进行一些单元测试，并在setUpClass. 我如何可以抛出一个unitest-fail内的setUpClass，如下面的简单的例子：
class MyTests(unittest.TestCase):
@classmethod
def setUpClass(cls):
unittest.TestCase.fail("Test")
def test1(self):
pass
if __name__ == '__main__':
unittest.main()
gives the error TypeError: unbound method fail() must be called with TestCase instance as first argument (got str instance instead).
给出错误TypeError: unbound method fail() must be called with TestCase instance as first argument (got str instance instead)。
I understand the error I get as fail is a instance method, and I don't have an instance of MyClassyet. Using an instance on-the-fly like
我明白我得到的错误是一个实例方法，我还没有一个实例MyClass。即时使用实例，例如
unittest.TestCase().fail("Test")
also does not work, as unittest.TestCaseitself has no tests. Any ideas how to fail all tests in MyClass, when some condition in setUpClassis not met?
也不起作用，因为unittest.TestCase它本身没有测试。MyClass当setUpClass不满足中的某些条件时，任何想法如何使 中的所有测试失败？
Followup question: Is there a way to see the tests in setUpClass?
后续问题：有没有办法在 中查看测试setUpClass？
采纳答案by Raufio
self.fail("test")put into your setUp instance method fails all the tests
self.fail("test")放入您的 setUp 实例方法未通过所有测试
I think the easiest way to do this at the class level is to make a class variable so something like:
我认为在类级别执行此操作的最简单方法是创建一个类变量，例如：
@classmethod
def setUpClass(cls):
cls.flag = False
def setUp(self):
if self.flag:
self.fail("conditions not met")
Hope this is what you want.
希望这是你想要的。
回答by Greg
Using a simple assert should work
使用简单的断言应该可以工作
assert False, "I mean for this to fail"
