problem including tests in unittest

Peter Otten __peter__ at
Thu Oct 12 20:58:33 CEST 2006

Chris Fonnesbeck wrote:

> I have a module for which I am trying to code a unit test. However,
> when I run unittest.main(), I get:
> In [1]: import PyMC
> In [2]: PyMC.unittest.main()
> ----------------------------------------------------------------------
> Ran 0 tests in 0.000s
> OK
> This is confusing, because I have set up a class called MCMCTest that
> is a sublcass of unttest.TestCase, which in turn contains a test
> method. Yet, unittest seems not to be aware of it. Is there anything I
> am forgetting?

By default unittest.main() scans the __main__ module for TestCases.
Though you could use it from an interactive interpreter

>>> import unittest
>>> unittest.main("PyMC", argv=["yadda", "-v"])
test_alpha (PyMC.Test) ... ok
test_beta (PyMC.Test) ... ok

Ran 2 tests in 0.000s

$ # Oops

without countermeasures unittest.main() will exit that too after completion.
The normal usage (the only one I know) is to put it inside the test script:

# your testcases
if __name__ == "__main__":

and run that from the shell:

$ python -v
test_alpha (__main__.Test) ... ok
test_beta (__main__.Test) ... ok

Ran 2 tests in 0.001s



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