如何在setUpClass中使python单元测试失败?

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问题描述

我正在使用 python 进行一些单元测试，并在 setUpClass 中进行一些预测试检查.如何在 setUpClass 中抛出 unitest-fail ，如下面的简单示例:

I am doing some unittests with python and some pre-test checks in setUpClass. How can I throw a unitest-fail within the setUpClass, as the following simple example:

class MyTests(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        unittest.TestCase.fail("Test")

    def test1(self):
        pass

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

给出错误TypeError: unbound method fail() must be called with TestCase instance as first argument (got str instance instead).

我明白我得到的错误是一个实例方法，我还没有 MyClass 的实例.即时使用实例，例如

I understand the error I get as fail is a instance method, and I don't have an instance of MyClass yet. Using an instance on-the-fly like

unittest.TestCase().fail("Test")

也不起作用，因为 unittest.TestCase 本身没有测试.当 setUpClass 中的某些条件不满足时，如何使 MyClass 中的所有测试失败?

also does not work, as unittest.TestCase itself has no tests. Any ideas how to fail all tests in MyClass, when some condition in setUpClass is not met?

后续问题:有没有办法查看setUpClass中的测试?

Followup question: Is there a way to see the tests in setUpClass?

推荐答案

self.fail("test") 放入你的 setUp 实例方法失败所有测试

self.fail("test") put into your setUp instance method fails all the tests

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:

I think the easiest way to do this at the class level is to make a class variable so something like:

@classmethod
def setUpClass(cls):
   cls.flag = False

def setUp(self):
   if self.flag:
       self.fail("conditions not met")

希望这是你想要的.

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SetUpClass