cpython/Lib/test/test_syslog.py

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from test.support import import_helper, threading_helper
syslog = import_helper.import_module("syslog") #skip if not supported
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from test import support
import sys
import threading
import time
import unittest
from textwrap import dedent
# XXX(nnorwitz): This test sucks. I don't know of a platform independent way
# to verify that the messages were really logged.
# The only purpose of this test is to verify the code doesn't crash or leak.
class Test(unittest.TestCase):
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def tearDown(self):
syslog.closelog()
def test_openlog(self):
syslog.openlog('python')
# Issue #6697.
self.assertRaises(UnicodeEncodeError, syslog.openlog, '\uD800')
def test_syslog(self):
syslog.openlog('python')
syslog.syslog('test message from python test_syslog')
syslog.syslog(syslog.LOG_ERR, 'test error from python test_syslog')
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def test_syslog_implicit_open(self):
syslog.closelog() # Make sure log is closed
syslog.syslog('test message from python test_syslog')
syslog.syslog(syslog.LOG_ERR, 'test error from python test_syslog')
def test_closelog(self):
syslog.openlog('python')
syslog.closelog()
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syslog.closelog() # idempotent operation
def test_setlogmask(self):
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mask = syslog.LOG_UPTO(syslog.LOG_WARNING)
oldmask = syslog.setlogmask(mask)
self.assertEqual(syslog.setlogmask(0), mask)
self.assertEqual(syslog.setlogmask(oldmask), mask)
def test_log_mask(self):
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mask = syslog.LOG_UPTO(syslog.LOG_WARNING)
self.assertTrue(mask & syslog.LOG_MASK(syslog.LOG_WARNING))
self.assertTrue(mask & syslog.LOG_MASK(syslog.LOG_ERR))
self.assertFalse(mask & syslog.LOG_MASK(syslog.LOG_INFO))
def test_openlog_noargs(self):
syslog.openlog()
syslog.syslog('test message from python test_syslog')
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@threading_helper.requires_working_threading()
def test_syslog_threaded(self):
start = threading.Event()
stop = False
def opener():
start.wait(10)
i = 1
while not stop:
syslog.openlog(f'python-test-{i}') # new string object
i += 1
def logger():
start.wait(10)
while not stop:
syslog.syslog('test message from python test_syslog')
orig_si = sys.getswitchinterval()
support.setswitchinterval(1e-9)
try:
threads = [threading.Thread(target=opener)]
threads += [threading.Thread(target=logger) for k in range(10)]
with threading_helper.start_threads(threads):
start.set()
time.sleep(0.1)
stop = True
finally:
sys.setswitchinterval(orig_si)
def test_subinterpreter_syslog(self):
# syslog.syslog() is not allowed in subinterpreters, but only if
# syslog.openlog() hasn't been called in the main interpreter yet.
with self.subTest('before openlog()'):
code = dedent('''
import syslog
caught_error = False
try:
syslog.syslog('foo')
except RuntimeError:
caught_error = True
assert(caught_error)
''')
res = support.run_in_subinterp(code)
self.assertEqual(res, 0)
syslog.openlog()
try:
with self.subTest('after openlog()'):
code = dedent('''
import syslog
syslog.syslog('foo')
''')
res = support.run_in_subinterp(code)
self.assertEqual(res, 0)
finally:
syslog.closelog()
def test_subinterpreter_openlog(self):
try:
code = dedent('''
import syslog
caught_error = False
try:
syslog.openlog()
except RuntimeError:
caught_error = True
assert(caught_error)
''')
res = support.run_in_subinterp(code)
self.assertEqual(res, 0)
finally:
syslog.closelog()
def test_subinterpreter_closelog(self):
syslog.openlog('python')
try:
code = dedent('''
import syslog
caught_error = False
try:
syslog.closelog()
except RuntimeError:
caught_error = True
assert(caught_error)
''')
res = support.run_in_subinterp(code)
self.assertEqual(res, 0)
finally:
syslog.closelog()
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if __name__ == "__main__":
unittest.main()