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from __future__ import print_function import signal import gevent.testing as greentest import gevent import pkg_resources try: cffi_version = pkg_resources.get_distribution('cffi').parsed_version except Exception: # pylint:disable=broad-except # No cffi installed. Shouldn't happen to gevent standard tests, # but maybe some downstream distributor removed it. cffi_version = None class Expected(Exception): pass def raise_Expected(): raise Expected('TestSignal') if hasattr(signal, 'SIGALRM'): class TestSignal(greentest.TestCase): error_fatal = False __timeout__ = greentest.LARGE_TIMEOUT def test_handler(self): self.assertRaises(TypeError, gevent.signal, signal.SIGALRM, 1) def test_alarm(self): sig = gevent.signal(signal.SIGALRM, raise_Expected) assert sig.ref is False, repr(sig.ref) sig.ref = True assert sig.ref is True sig.ref = False try: signal.alarm(1) try: gevent.sleep(2) raise AssertionError('must raise Expected') except Expected as ex: assert str(ex) == 'TestSignal', ex # also let's check that alarm is persistent signal.alarm(1) try: gevent.sleep(2) raise AssertionError('must raise Expected') except Expected as ex: assert str(ex) == 'TestSignal', ex finally: sig.cancel() # pylint:disable=no-member @greentest.skipIf((greentest.PY3 and greentest.CFFI_BACKEND and cffi_version < pkg_resources.parse_version('1.11.3')), "https://bitbucket.org/cffi/cffi/issues/352/systemerror-returned-a-result-with-an") @greentest.ignores_leakcheck def test_reload(self): # The site module tries to set attributes # on all the modules that are loaded (specifically, __file__). # If gevent.signal is loaded, and is our compatibility shim, # this used to fail on Python 2: sys.modules['gevent.signal'] has no # __loader__ attribute, so site.py's main() function tries to do # gevent.signal.__file__ = os.path.abspath(gevent.signal.__file__), which # used to not be allowed. (Under Python 3, __loader__ is present so this # doesn't happen). See # https://github.com/gevent/gevent/issues/805 # This fails on Python 3.5 under linux (travis CI) but not # locally on macOS with (for both libuv and libev cffi); sometimes it # failed with libuv on Python 3.6 too, but not always: # AttributeError: cffi library 'gevent.libuv._corecffi' has no function, # constant or global variable named '__loader__' # which in turn leads to: # SystemError: <built-in function getattr> returned a result with an error set # It's not safe to continue after a SystemError, so we just skip the test there. # As of Jan 2018 with CFFI 1.11.2 this happens reliably on macOS 3.6 and 3.7 # as well. # See https://bitbucket.org/cffi/cffi/issues/352/systemerror-returned-a-result-with-an # This is fixed in 1.11.3 import gevent.signal # make sure it's in sys.modules pylint:disable=redefined-outer-name assert gevent.signal import site if greentest.PY34: from importlib import reload as reload_module elif greentest.PY3: from imp import reload as reload_module else: # builtin on py2 reload_module = reload # pylint:disable=undefined-variable try: reload_module(site) except TypeError: # Non-CFFI on Travis triggers this, for some reason, # but only on 3.6, not 3.4 or 3.5, and not yet on 3.7. # The only module seen to trigger this is __main__, i.e., this module. # This is hard to trigger in a virtualenv since it appears they # install their own site.py, different from the one that ships with # Python 3.6., and at least the version I have doesn't mess with # __cached__ assert greentest.PY36 import sys for m in set(sys.modules.values()): try: if m.__cached__ is None: print("Module has None __cached__", m, file=sys.stderr) except AttributeError: continue if __name__ == '__main__': greentest.main()