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import contextlib
import unittest
import pytest
from kazoo.client import KazooClient
from kazoo.handlers import utils
from kazoo.protocol import states as kazoo_states
from kazoo.tests import test_client
from kazoo.tests import test_lock
from kazoo.tests import util as test_util
try:
import eventlet
from eventlet.green import threading
from kazoo.handlers import eventlet as eventlet_handler
EVENTLET_HANDLER_AVAILABLE = True
except ImportError:
EVENTLET_HANDLER_AVAILABLE = False
@contextlib.contextmanager
def start_stop_one(handler=None):
if not handler:
handler = eventlet_handler.SequentialEventletHandler()
handler.start()
try:
yield handler
finally:
handler.stop()
class TestEventletHandler(unittest.TestCase):
def setUp(self):
if not EVENTLET_HANDLER_AVAILABLE:
pytest.skip("eventlet handler not available.")
super(TestEventletHandler, self).setUp()
def test_started(self):
with start_stop_one() as handler:
assert handler.running is True
assert len(handler._workers) != 0
assert handler.running is False
assert len(handler._workers) == 0
def test_spawn(self):
captures = []
def cb():
captures.append(1)
with start_stop_one() as handler:
handler.spawn(cb)
assert len(captures) == 1
def test_dispatch(self):
captures = []
def cb():
captures.append(1)
with start_stop_one() as handler:
handler.dispatch_callback(kazoo_states.Callback("watch", cb, []))
assert len(captures) == 1
def test_async_link(self):
captures = []
def cb(handler):
captures.append(handler)
with start_stop_one() as handler:
r = handler.async_result()
r.rawlink(cb)
r.set(2)
assert len(captures) == 1
assert r.get() == 2
def test_timeout_raising(self):
handler = eventlet_handler.SequentialEventletHandler()
with pytest.raises(handler.timeout_exception):
raise handler.timeout_exception("This is a timeout")
def test_async_ok(self):
captures = []
def delayed():
captures.append(1)
return 1
def after_delayed(handler):
captures.append(handler)
with start_stop_one() as handler:
r = handler.async_result()
r.rawlink(after_delayed)
w = handler.spawn(utils.wrap(r)(delayed))
w.join()
assert len(captures) == 2
assert captures[0] == 1
assert r.get() == 1
def test_get_with_no_block(self):
handler = eventlet_handler.SequentialEventletHandler()
with start_stop_one(handler):
r = handler.async_result()
with pytest.raises(handler.timeout_exception):
r.get(block=False)
r.set(1)
assert r.get() == 1
def test_async_exception(self):
def broken():
raise IOError("Failed")
with start_stop_one() as handler:
r = handler.async_result()
w = handler.spawn(utils.wrap(r)(broken))
w.join()
assert r.successful() is False
with pytest.raises(IOError):
r.get()
def test_huge_file_descriptor(self):
try:
import resource
except ImportError:
self.skipTest("resource module unavailable on this platform")
from eventlet.green import socket
from kazoo.handlers.utils import create_tcp_socket
try:
resource.setrlimit(resource.RLIMIT_NOFILE, (4096, 4096))
except (ValueError, resource.error):
self.skipTest("couldnt raise fd limit high enough")
fd = 0
socks = []
while fd < 4000:
sock = create_tcp_socket(socket)
fd = sock.fileno()
socks.append(sock)
with start_stop_one() as h:
h.start()
h.select(socks, [], [], 0)
h.stop()
for sock in socks:
sock.close()
class TestEventletClient(test_client.TestClient):
def setUp(self):
if not EVENTLET_HANDLER_AVAILABLE:
pytest.skip("eventlet handler not available.")
super(TestEventletClient, self).setUp()
@staticmethod
def make_event():
return threading.Event()
@staticmethod
def make_condition():
return threading.Condition()
def _makeOne(self, *args):
return eventlet_handler.SequentialEventletHandler(*args)
def _get_client(self, **kwargs):
kwargs["handler"] = self._makeOne()
return KazooClient(self.hosts, **kwargs)
class TestEventletSemaphore(test_lock.TestSemaphore):
def setUp(self):
if not EVENTLET_HANDLER_AVAILABLE:
pytest.skip("eventlet handler not available.")
super(TestEventletSemaphore, self).setUp()
@staticmethod
def make_condition():
return threading.Condition()
@staticmethod
def make_event():
return threading.Event()
@staticmethod
def make_thread(*args, **kwargs):
return threading.Thread(*args, **kwargs)
def _makeOne(self, *args):
return eventlet_handler.SequentialEventletHandler(*args)
def _get_client(self, **kwargs):
kwargs["handler"] = self._makeOne()
c = KazooClient(self.hosts, **kwargs)
try:
self._clients.append(c)
except AttributeError:
self._client = [c]
return c
class TestEventletLock(test_lock.KazooLockTests):
def setUp(self):
if not EVENTLET_HANDLER_AVAILABLE:
pytest.skip("eventlet handler not available.")
super(TestEventletLock, self).setUp()
@staticmethod
def make_condition():
return threading.Condition()
@staticmethod
def make_event():
return threading.Event()
@staticmethod
def make_thread(*args, **kwargs):
return threading.Thread(*args, **kwargs)
@staticmethod
def make_wait():
return test_util.Wait(getsleep=(lambda: eventlet.sleep))
def _makeOne(self, *args):
return eventlet_handler.SequentialEventletHandler(*args)
def _get_client(self, **kwargs):
kwargs["handler"] = self._makeOne()
c = KazooClient(self.hosts, **kwargs)
try:
self._clients.append(c)
except AttributeError:
self._client = [c]
return c
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