How do you test that a Python function throws an exception?

Asked 2008-09-24T20:00:35.597

1277

How does one write a unit test that fails only if a function doesn't throw an expected exception?

python unit-testing exception

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1 Answer

1047

Use TestCase.assertRaises from the unittest module, for example:

import mymod

class MyTestCase(unittest.TestCase):
    def test1(self):
        self.assertRaises(SomeCoolException, mymod.myfunc)

answered 2008-09-24T20:02:29.600