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# *****************************************************************************
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# See NOTICE file for details.
#
# *****************************************************************************
import os
import signal
import sys
import threading
import unittest
import jpype
import subrun
@subrun.TestCase
class SignalsTest(unittest.TestCase):
@classmethod
def setUpClass(cls):
# set up signal handling before starting jpype
cls.sigint_event = threading.Event()
cls.sigterm_event = threading.Event()
def sigint_handler(sig, frame):
cls.sigint_event.set()
def sigterm_handler(sig, frame):
cls.sigterm_event.set()
signal.signal(signal.SIGINT, sigint_handler)
signal.signal(signal.SIGTERM, sigterm_handler)
# start jpype with interrupt=False to pass back control to python
jpype.startJVM(interrupt=False)
def setUp(self):
if sys.platform == "win32":
raise unittest.SkipTest("signals test not applicable on windows")
self.sigint_event.clear()
self.sigterm_event.clear()
def testSigInt(self):
os.kill(os.getpid(), signal.SIGINT)
# the test is executed in the main thread. The signal cannot interrupt the threading.Event.wait() call
# so asserting the return value of `wait` does not work.
# However, after returning from the wait, the control should go to the signal handler, and the next `is_set`
# call will reflect the actual value of the flag.
self.sigint_event.wait(0.1)
self.assertTrue(self.sigint_event.is_set())
self.assertFalse(self.sigterm_event.is_set())
def testSigTerm(self):
os.kill(os.getpid(), signal.SIGTERM)
self.sigterm_event.wait(0.1)
if sys.version_info < (3, 10):
# python versions below 3.10 do not support PyErr_SetInterruptEx
# so SIGTERM will be sent as SIGINT to the interpreter
self.assertTrue(self.sigint_event.is_set())
self.assertFalse(self.sigterm_event.is_set())
else:
self.assertTrue(self.sigterm_event.is_set())
self.assertFalse(self.sigint_event.is_set())
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