I found that the behaviour of assertRaises used as a context manager a bit surprising.
This small example doesn't fail, but the OSError exception is cathed even if not declared.. Is this the expected behaviour (from the doc I would say it's not). (Running on arch-linux 64 bits and Python 2.7.3, but it doesn the same with Python 3.2.3) import unittest class TestWithRaises(unittest.TestCase): def test_ass(self): with self.assertRaises(AssertionError): assert False, "should happen" raise OSError("should give error") if __name__ == '__main__': unittest.main() -- http://mail.python.org/mailman/listinfo/python-list