I am working on a library, and adding one feature broke a seemingly unrelated
feature. As I already had Test Cases written, I decided to try to incorporate
the logging module into my class, and turn on debugging at the logger before
the newly-broken test.
Here is an example script:
# -----
#!/usr/bin/env python
import logging
def get_vals():
return ['a','b','c']
class SimpleChecker(object):
def __init__(self, callback=None):
self.callback = callback
self.logger = logging.getLogger(self.__class__.__name__)
h = logging.StreamHandler()
f = logging.Formatter("%(name)s - %(levelname)s - %(message)s")
h.setFormatter(f)
self.logger.addHandler(h)
def __call__(self, thing):
self.logger.debug('calling %s' % thing)
vals = self.callback()
return thing in vals
import unittest
class LoaderTC(unittest.TestCase):
def setUp(self):
self.checker = SimpleChecker(get_vals)
def tearDown(self):
del self.checker
def test_callable(self):
self.assertTrue(callable(self.checker),
'loader did not create callable object')
self.assertTrue(callable(self.checker.callback),
'loader did not create callable callback')
self.checker.logger.setLevel(logging.DEBUG)
self.assertTrue(self.checker('q') is False, "checker accepted bad
input")
class NameSpaceTC(unittest.TestCase):
def setUp(self):
self.checker = SimpleChecker(get_vals)
def tearDown(self):
del self.checker
def test_callable(self):
self.assertTrue(callable(self.checker),
'loader did not create callable object')
self.assertTrue(callable(self.checker.callback),
'loader did not create callable callback')
self.checker.logger.setLevel(logging.DEBUG)
self.assertTrue(self.checker('a'), "checker did not accept good value")
self.assertFalse(self.checker('f'), "checker accepted bad value")
if __name__=='__main__':
unittest.main(verbosity=0)
# -------
When I run this, I get:
SimpleChecker - DEBUG - calling q
SimpleChecker - DEBUG - calling a
SimpleChecker - DEBUG - calling a
SimpleChecker - DEBUG - calling f
SimpleChecker - DEBUG - calling f
----------------------------------------------------------------------
Ran 2 tests in 0.013s
OK
Exit code: False
Why am I seeing those extra debugging lines? In the script I'm really trying to
debug, I see 12-13 debug messages repeated, making actual debugging difficult.
Josh English
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