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# A greenlet that's killed before it is ever started
# should never be switched to
import gevent
import gevent.testing as greentest
class MyException(Exception):
pass
class TestSwitch(greentest.TestCase):
def setUp(self):
super(TestSwitch, self).setUp()
self.switched_to = [False, False]
self.caught = None
def should_never_run(self, i): # pragma: no cover
self.switched_to[i] = True
def check(self, g, g2):
gevent.joinall((g, g2))
self.assertEqual([False, False], self.switched_to)
# They both have a GreenletExit as their value
self.assertIsInstance(g.value, gevent.GreenletExit)
self.assertIsInstance(g2.value, gevent.GreenletExit)
# They both have no reported exc_info
self.assertIsNone(g.exc_info)
self.assertIsNone(g2.exc_info)
self.assertIsNone(g.exception)
self.assertIsNone(g2.exception)
def test_gevent_kill(self):
g = gevent.spawn(self.should_never_run, 0) # create but do not switch to
g2 = gevent.spawn(self.should_never_run, 1) # create but do not switch to
# Using gevent.kill
gevent.kill(g)
gevent.kill(g2)
self.check(g, g2)
def test_greenlet_kill(self):
# killing directly
g = gevent.spawn(self.should_never_run, 0)
g2 = gevent.spawn(self.should_never_run, 1)
g.kill()
g2.kill()
self.check(g, g2)
def test_throw(self):
# throwing
g = gevent.spawn(self.should_never_run, 0)
g2 = gevent.spawn(self.should_never_run, 1)
g.throw(gevent.GreenletExit)
g2.throw(gevent.GreenletExit)
self.check(g, g2)
def catcher(self):
try:
while True:
gevent.sleep(0)
except MyException as e:
self.caught = e
def test_kill_exception(self):
# Killing with gevent.kill gets the right exception
g = gevent.spawn(self.catcher)
g.start()
gevent.sleep()
gevent.kill(g, MyException())
gevent.sleep()
self.assertIsInstance(self.caught, MyException)
self.assertIsNone(g.exception, MyException)
if __name__ == '__main__':
greentest.main()