[Pyunit-interest] Some PyUnit snippets

[Joshua Macy/T. P. <Ma...@to...>]

Here are a couple of things that I do all the time, just in case anyone is
interested.  (I think both might be relevant to the current discussion on
the Python Dev in regard to using PyUnit as Python's official unit test
module.)

Syntactic sugar for common tests:

def assertEquals(got, expect, error):
    assert got == expect, '''%s: expected %s, got %s''' % (error, `expect`,
`got`)

Invocation of Tim Peters' doctext module (also becoming part of Python
core):

class DocTestCase(unittest.TestCase):
    def setUp(self):
        """Override setUp in derived classes to set the doctest to the
appropriate doctest object from the module.

        Usually this looks like:
        import doctest, mymodule
        self.doctest = doctest.testmod(mymodule, verbose=0)
        """
        self.doctest = None

    def checkDoc(self):
        if self.doctest:
            errors, tests = self.doctest(0)
            assertEquals(errors, 0,
                         '%s Doctest failed, %s errors out of %s tests' %
(self.__class__.__name__, errors, tests))

It might actually make more sense to override DocTestCase's __init__ to set
self.doctest, since there's no real reason to create a doctest object every
time.  On the other hand, a DocTestCase will almost never have more than
one check method, so performance-wise it's probably moot.


Joshua