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Unit testing
============
When developing unit tests, you may find the
:class:`~logutils.testing.TestHandler` and :class:`~logutils.testing.Matcher`
classes useful.
Typical usage::
import logging
from logutils.testing import TestHandler, Matcher
import unittest
class LoggingTest(unittest.TestCase):
def setUp(self):
self.handler = h = TestHandler(Matcher())
self.logger = l = logging.getLogger()
l.addHandler(h)
def tearDown(self):
self.logger.removeHandler(self.handler)
self.handler.close()
def test_simple(self):
"Simple test of logging test harness."
# Just as a demo, let's log some messages.
# Only one should show up in the log.
self.logger.debug("This won't show up.")
self.logger.info("Neither will this.")
self.logger.warning("But this will.")
h = self.handler
self.assertTrue(h.matches(levelno=logging.WARNING))
self.assertFalse(h.matches(levelno=logging.DEBUG))
self.assertFalse(h.matches(levelno=logging.INFO))
def test_partial(self):
"Test of partial matching in logging test harness."
# Just as a demo, let's log some messages.
# Only one should show up in the log.
self.logger.debug("This won't show up.")
self.logger.info("Neither will this.")
self.logger.warning("But this will.")
h = self.handler
self.assertTrue(h.matches(msg="ut th")) # from "But this will"
self.assertTrue(h.matches(message="ut th")) # from "But this will"
self.assertFalse(h.matches(message="either"))
self.assertFalse(h.matches(message="won't"))
def test_multiple(self):
"Test of matching multiple values in logging test harness."
# Just as a demo, let's log some messages.
# Only one should show up in the log.
self.logger.debug("This won't show up.")
self.logger.info("Neither will this.")
self.logger.warning("But this will.")
self.logger.error("And so will this.")
h = self.handler
self.assertTrue(h.matches(levelno=logging.WARNING,
message='ut thi'))
self.assertTrue(h.matches(levelno=logging.ERROR,
message='nd so wi'))
self.assertFalse(h.matches(levelno=logging.INFO))
.. automodule:: logutils.testing
:members:
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