qubes-installer-qubes-os/anaconda/tests/lib/timer.py
Marek Marczykowski-Górecki 701ced5ddb anaconda: update to 22.20.13-1
Apply diff anaconda-21.48.21-1..anaconda-22.20.13-1
2016-03-22 02:27:17 +13:00

42 lines
1.4 KiB
Python

#
# timer.py: timer decorator for unittest functions
#
# Copyright (C) 2014 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Author: David Shea <dshea@redhat.com>
from contextlib import contextmanager
import signal
@contextmanager
def timer(seconds):
"""Return a timer context manager.
If the code within the context does not finish within the given number
of seconds, it will raise an AssertionError.
"""
def _handle_sigalrm(signum, frame):
raise AssertionError("Test failed to complete within %d seconds" % seconds)
old_handler = signal.signal(signal.SIGALRM, _handle_sigalrm)
try:
signal.alarm(seconds)
yield
finally:
# Put everything back
signal.alarm(0)
signal.signal(signal.SIGALRM, old_handler)