Unittest setUpClass not working

Question

I'm trying to get started with unittest, but I got a problem with setUpClass() . Here is my test code ...

 import unittest class TestRepGen(unittest.TestCase): """ Contains methods for training data testing """ testvar = None @classmethod def setUpClass(cls): cls.testvar = 6 def test_method(self): """ Ensure data is selected """ self.assertIsNotNone(self.testvar,"self.testvar is None!") # run tests if __name__ == '__main__': unittest.main() 

An error message is displayed indicating that self.testvar == None , and has not been changed to setUpClass() . Is there something wrong with my code?

I get the same result if I run the code from my IDE (Wing) or directly from the command line. For the record, I use Python 3.2.1 under Windows7.

Answer 1

Well - this is the time to admit that it was my mistake. I used 3.1.2 when I should (and thought I was) using 3.2.1. Now I changed the correct version, everything is fine, and the test passes. Many thanks to everyone who answered (and sorry for wasting your time :-().

Answer 2

setUpClass is new to the unittest environment in versions 2.7 and 3.2. If you want to use it with the old version, you will need to use your nose as a test runner instead of unittest.

Answer 3

I am going to assume that you are not calling this test class directly, but a derived class.

If this is the case, you need to call up setUpClass() manually - it will not be automatically called.

 class TestB(TestRepGen): @classmethod def setUpClass(cls): super(TestB, cls).setUpClass() 

Also, accoding to docs class-level fixtures are implemented by the test suite . So, if you call TestRepGen or test_method some weird way that you did not send messages, setUpClass may not start.