How can I get Python's unittest to not catch exceptions?

Question

I'm working on a Django project but I think this is a pure Python unittest question.

Normally, when you run tests, exceptions will be caught by the test runner and handled accordingly.

For debugging purposes, I want to disable this behavior, ie so that:

python -i manage.py test

will break into the interactive Python shell on an exception, as normal.

How to do that?

EDIT: based on the answers so far, it seems like this is more of a Django-specific question than I realized!

Answer 1

You can use django-nose test runner, it works with unittest tests, and run your tests like python manage.py test -v2 --pdb . And nose will run pdb for you.

Answer 2

一个新的应用程序django-pdb使这更好，支持打破测试失败或常规代码中未捕获的异常的模式。

Answer 3

You could try something like this in a module within your package, then use CondCatches( your exceptions, ) in your code:

# System Imports
import os

class NoSuchException(Exception):
    """ Null Exception will not match any exception."""
    pass

def CondCatches(conditional, *args):
    """
    Depending on conditional either returns the arguments or NoSuchException.

    Use this to check have a caught exception that is suppressed some of the
    time. e.g.:
    from DisableableExcept import CondCatches
    import os
    try:
        # Something like:
        print "Do something bad!"
        print 23/0
    except CondCatches(os.getenv('DEBUG'), Exception), e:
        #handle the exception in non DEBUG
        print 'Somthing has a problem!', e
    """
    if conditional:
        return (NoSuchException, )
    else:
        return args

if __name__ == '__main__':
    # Do SOMETHING if file is called on it's own.
    try:
        print 'To Suppress Catching this exception set DEBUG=anything'
        print 1 / 0
    except CondCatches(os.getenv('DEBUG'), ValueError, ZeroDivisionError), e:
        print "Caught Exception", e