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122 lines
4.5 KiB
Python
122 lines
4.5 KiB
Python
5 years ago
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from __future__ import print_function
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import signal
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import gevent.testing as greentest
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import gevent
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import pkg_resources
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try:
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cffi_version = pkg_resources.get_distribution('cffi').parsed_version
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except Exception: # pylint:disable=broad-except
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# No cffi installed. Shouldn't happen to gevent standard tests,
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# but maybe some downstream distributor removed it.
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cffi_version = None
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class Expected(Exception):
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pass
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def raise_Expected():
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raise Expected('TestSignal')
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@greentest.skipUnless(hasattr(signal, 'SIGALRM'),
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"Uses SIGALRM")
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class TestSignal(greentest.TestCase):
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error_fatal = False
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__timeout__ = greentest.LARGE_TIMEOUT
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def test_handler(self):
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with self.assertRaises(TypeError):
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gevent.signal_handler(signal.SIGALRM, 1)
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def test_alarm(self):
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sig = gevent.signal_handler(signal.SIGALRM, raise_Expected)
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assert sig.ref is False, repr(sig.ref)
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sig.ref = True
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assert sig.ref is True
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sig.ref = False
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try:
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signal.alarm(1)
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try:
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gevent.sleep(2)
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raise AssertionError('must raise Expected')
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except Expected as ex:
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assert str(ex) == 'TestSignal', ex
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# also let's check that alarm is persistent
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signal.alarm(1)
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try:
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gevent.sleep(2)
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raise AssertionError('must raise Expected')
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except Expected as ex:
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assert str(ex) == 'TestSignal', ex
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finally:
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sig.cancel() # pylint:disable=no-member
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@greentest.skipIf((greentest.PY3
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and greentest.CFFI_BACKEND
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and cffi_version < pkg_resources.parse_version('1.11.3')),
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"https://bitbucket.org/cffi/cffi/issues/352/systemerror-returned-a-result-with-an")
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@greentest.ignores_leakcheck
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def test_reload(self):
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# The site module tries to set attributes
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# on all the modules that are loaded (specifically, __file__).
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# If gevent.signal is loaded, and is our compatibility shim,
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# this used to fail on Python 2: sys.modules['gevent.signal'] has no
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# __loader__ attribute, so site.py's main() function tries to do
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# gevent.signal.__file__ = os.path.abspath(gevent.signal.__file__), which
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# used to not be allowed. (Under Python 3, __loader__ is present so this
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# doesn't happen). See
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# https://github.com/gevent/gevent/issues/805
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# This fails on Python 3.5 under linux (travis CI) but not
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# locally on macOS with (for both libuv and libev cffi); sometimes it
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# failed with libuv on Python 3.6 too, but not always:
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# AttributeError: cffi library 'gevent.libuv._corecffi' has no function,
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# constant or global variable named '__loader__'
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# which in turn leads to:
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# SystemError: <built-in function getattr> returned a result with an error set
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# It's not safe to continue after a SystemError, so we just skip the test there.
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# As of Jan 2018 with CFFI 1.11.2 this happens reliably on macOS 3.6 and 3.7
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# as well.
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# See https://bitbucket.org/cffi/cffi/issues/352/systemerror-returned-a-result-with-an
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# This is fixed in 1.11.3
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import gevent.signal # make sure it's in sys.modules pylint:disable=redefined-outer-name
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assert gevent.signal
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import site
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if greentest.PY3:
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from importlib import reload as reload_module
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else:
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# builtin on py2
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reload_module = reload # pylint:disable=undefined-variable
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try:
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reload_module(site)
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except TypeError:
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# Non-CFFI on Travis triggers this, for some reason,
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# but only on 3.6, not 3.4 or 3.5, and not yet on 3.7.
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# The only module seen to trigger this is __main__, i.e., this module.
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# This is hard to trigger in a virtualenv since it appears they
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# install their own site.py, different from the one that ships with
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# Python 3.6., and at least the version I have doesn't mess with
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# __cached__
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assert greentest.PY36
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import sys
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for m in set(sys.modules.values()):
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try:
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if m.__cached__ is None:
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print("Module has None __cached__", m, file=sys.stderr)
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except AttributeError:
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continue
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if __name__ == '__main__':
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greentest.main()
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