Current File : //lib/python3/dist-packages/nose2/plugins/debugger.py
"""
Start a :func:`pdb.post_mortem` on errors and failures.
This plugin implements :func:`testOutcome` and will drop into pdb
whenever it sees a test outcome that includes exc_info.
It fires :func:`beforeInteraction` before launching pdb and
:func:`afterInteraction` after. Other plugins may implement
:func:`beforeInteraction` to return ``False`` and set ``event.handled`` to
prevent this plugin from launching pdb.
"""
import logging
import pdb
from nose2 import events
__unittest = True
log = logging.getLogger(__name__)
class Debugger(events.Plugin):
"""Enter pdb on test error or failure
.. attribute :: pdb
For ease of mocking and using different pdb implementations, pdb
is aliased as a class attribute.
"""
configSection = 'debugger'
commandLineSwitch = ('D', 'debugger', 'Enter pdb on test fail or error')
# allow easy mocking and replacment of pdb
pdb = pdb
def __init__(self):
self.errorsOnly = self.config.as_bool('errors-only', default=False)
def testOutcome(self, event):
"""Drop into pdb on unexpected errors or failures"""
if not event.exc_info or event.expected:
# skipped tests, unexpected successes, expected failures
return
value, tb = event.exc_info[1:]
test = event.test
if self.errorsOnly and isinstance(value, test.failureException):
return
evt = events.UserInteractionEvent()
result = self.session.hooks.beforeInteraction(evt)
try:
if not result and evt.handled:
log.warning(
"Skipping pdb for %s, user interaction not allowed", event)
return
self.pdb.post_mortem(tb)
finally:
self.session.hooks.afterInteraction(evt)
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