Python unit test with base and sub class

Question

I currently have a few unit tests which share a common set of tests. Here\'s an example:

import unittest

class BaseTest(unittest.TestCase):

    def testCo         


        

Answer 1

So this is kind of an old thread but I came across this problem today and thought of my own hack for it. It uses a decorator that makes the values of the functions None when acessed through the base class. Don't need to worry about setup and setupclass because if the baseclass has no tests they won't run.

import types
import unittest


class FunctionValueOverride(object):
    def __init__(self, cls, default, override=None):
        self.cls = cls
        self.default = default
        self.override = override

    def __get__(self, obj, klass):
        if klass == self.cls:
            return self.override
        else:
            if obj:
                return types.MethodType(self.default, obj)
            else:
                return self.default


def fixture(cls):
    for t in vars(cls):
        if not callable(getattr(cls, t)) or t[:4] != "test":
            continue
        setattr(cls, t, FunctionValueOverride(cls, getattr(cls, t)))
    return cls


@fixture
class BaseTest(unittest.TestCase):
    def testCommon(self):
        print('Calling BaseTest:testCommon')
        value = 5
        self.assertEqual(value, 5)


class SubTest1(BaseTest):
    def testSub1(self):
        print('Calling SubTest1:testSub1')
        sub = 3
        self.assertEqual(sub, 3)


class SubTest2(BaseTest):

    def testSub2(self):
        print('Calling SubTest2:testSub2')
        sub = 4
        self.assertEqual(sub, 4)

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