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|
import time
import threading
import uuid
import pytest
from kazoo.exceptions import KazooException
from kazoo.protocol.states import EventType
from kazoo.testing import KazooTestCase
class KazooDataWatcherTests(KazooTestCase):
def setUp(self):
super(KazooDataWatcherTests, self).setUp()
self.path = "/" + uuid.uuid4().hex
self.client.ensure_path(self.path)
def test_data_watcher(self):
update = threading.Event()
data = [True]
# Make it a non-existent path
self.path += 'f'
@self.client.DataWatch(self.path)
def changed(d, stat):
data.pop()
data.append(d)
update.set()
update.wait(10)
assert data == [None]
update.clear()
self.client.create(self.path, b'fred')
update.wait(10)
assert data[0] == b'fred'
update.clear()
def test_data_watcher_once(self):
update = threading.Event()
data = [True]
# Make it a non-existent path
self.path += 'f'
dwatcher = self.client.DataWatch(self.path)
@dwatcher
def changed(d, stat):
data.pop()
data.append(d)
update.set()
update.wait(10)
assert data == [None]
update.clear()
with pytest.raises(KazooException):
@dwatcher
def func(d, stat):
data.pop()
def test_data_watcher_with_event(self):
# Test that the data watcher gets passed the event, if it
# accepts three arguments
update = threading.Event()
data = [True]
# Make it a non-existent path
self.path += 'f'
@self.client.DataWatch(self.path)
def changed(d, stat, event):
data.pop()
data.append(event)
update.set()
update.wait(10)
assert data == [None]
update.clear()
self.client.create(self.path, b'fred')
update.wait(10)
assert data[0].type == EventType.CREATED
update.clear()
def test_func_style_data_watch(self):
update = threading.Event()
data = [True]
# Make it a non-existent path
path = self.path + 'f'
def changed(d, stat):
data.pop()
data.append(d)
update.set()
self.client.DataWatch(path, changed)
update.wait(10)
assert data == [None]
update.clear()
self.client.create(path, b'fred')
update.wait(10)
assert data[0] == b'fred'
update.clear()
def test_datawatch_across_session_expire(self):
update = threading.Event()
data = [True]
@self.client.DataWatch(self.path)
def changed(d, stat):
data.pop()
data.append(d)
update.set()
update.wait(10)
assert data == [b""]
update.clear()
self.expire_session(threading.Event)
self.client.retry(self.client.set, self.path, b'fred')
update.wait(25)
assert data[0] == b'fred'
def test_func_stops(self):
update = threading.Event()
data = [True]
self.path += "f"
fail_through = []
@self.client.DataWatch(self.path)
def changed(d, stat):
data.pop()
data.append(d)
update.set()
if fail_through:
return False
update.wait(10)
assert data == [None]
update.clear()
fail_through.append(True)
self.client.create(self.path, b'fred')
update.wait(10)
assert data[0] == b'fred'
update.clear()
self.client.set(self.path, b'asdfasdf')
update.wait(0.2)
assert data[0] == b'fred'
d, stat = self.client.get(self.path)
assert d == b'asdfasdf'
def test_no_such_node(self):
args = []
@self.client.DataWatch("/some/path")
def changed(d, stat):
args.extend([d, stat])
assert args == [None, None]
def test_no_such_node_for_children_watch(self):
args = []
path = self.path + '/test_no_such_node_for_children_watch'
update = threading.Event()
def changed(children):
args.append(children)
update.set()
# watch a node which does not exist
children_watch = self.client.ChildrenWatch(path, changed)
assert update.is_set() is False
assert children_watch._stopped is True
assert args == []
# watch a node which exists
self.client.create(path, b'')
children_watch = self.client.ChildrenWatch(path, changed)
update.wait(3)
assert args == [[]]
update.clear()
# watch changes
self.client.create(path + '/fred', b'')
update.wait(3)
assert args == [[], ['fred']]
update.clear()
# delete children
self.client.delete(path + '/fred')
update.wait(3)
assert args == [[], ['fred'], []]
update.clear()
# delete watching
self.client.delete(path)
# a hack for waiting the watcher stop
for retry in range(5):
if children_watch._stopped:
break
children_watch._run_lock.acquire()
children_watch._run_lock.release()
time.sleep(retry / 10.0)
assert update.is_set() is False
assert children_watch._stopped is True
def test_watcher_evaluating_to_false(self):
class WeirdWatcher(list):
def __call__(self, *args):
self.called = True
watcher = WeirdWatcher()
self.client.DataWatch(self.path, watcher)
self.client.set(self.path, b'mwahaha')
assert watcher.called is True
def test_watcher_repeat_delete(self):
a = []
ev = threading.Event()
self.client.delete(self.path)
@self.client.DataWatch(self.path)
def changed(val, stat):
a.append(val)
ev.set()
assert a == [None]
ev.wait(10)
ev.clear()
self.client.create(self.path, b'blah')
ev.wait(10)
assert ev.is_set() is True
ev.clear()
assert a == [None, b'blah']
self.client.delete(self.path)
ev.wait(10)
assert ev.is_set() is True
ev.clear()
assert a == [None, b'blah', None]
self.client.create(self.path, b'blah')
ev.wait(10)
assert ev.is_set() is True
ev.clear()
assert a == [None, b'blah', None, b'blah']
def test_watcher_with_closing(self):
a = []
ev = threading.Event()
self.client.delete(self.path)
@self.client.DataWatch(self.path)
def changed(val, stat):
a.append(val)
ev.set()
assert a == [None]
b = False
try:
self.client.stop()
except:
b = True
assert b is False
class KazooChildrenWatcherTests(KazooTestCase):
def setUp(self):
super(KazooChildrenWatcherTests, self).setUp()
self.path = "/" + uuid.uuid4().hex
self.client.ensure_path(self.path)
def test_child_watcher(self):
update = threading.Event()
all_children = ['fred']
@self.client.ChildrenWatch(self.path)
def changed(children):
while all_children:
all_children.pop()
all_children.extend(children)
update.set()
update.wait(10)
assert all_children == []
update.clear()
self.client.create(self.path + '/' + 'smith')
update.wait(10)
assert all_children == ['smith']
update.clear()
self.client.create(self.path + '/' + 'george')
update.wait(10)
assert sorted(all_children) == ['george', 'smith']
def test_child_watcher_once(self):
update = threading.Event()
all_children = ['fred']
cwatch = self.client.ChildrenWatch(self.path)
@cwatch
def changed(children):
while all_children:
all_children.pop()
all_children.extend(children)
update.set()
update.wait(10)
assert all_children == []
update.clear()
with pytest.raises(KazooException):
@cwatch
def changed_again(children):
update.set()
def test_child_watcher_with_event(self):
update = threading.Event()
events = [True]
@self.client.ChildrenWatch(self.path, send_event=True)
def changed(children, event):
events.pop()
events.append(event)
update.set()
update.wait(10)
assert events == [None]
update.clear()
self.client.create(self.path + '/' + 'smith')
update.wait(10)
assert events[0].type == EventType.CHILD
update.clear()
def test_func_style_child_watcher(self):
update = threading.Event()
all_children = ['fred']
def changed(children):
while all_children:
all_children.pop()
all_children.extend(children)
update.set()
self.client.ChildrenWatch(self.path, changed)
update.wait(10)
assert all_children == []
update.clear()
self.client.create(self.path + '/' + 'smith')
update.wait(10)
assert all_children == ['smith']
update.clear()
self.client.create(self.path + '/' + 'george')
update.wait(10)
assert sorted(all_children) == ['george', 'smith']
def test_func_stops(self):
update = threading.Event()
all_children = ['fred']
fail_through = []
@self.client.ChildrenWatch(self.path)
def changed(children):
while all_children:
all_children.pop()
all_children.extend(children)
update.set()
if fail_through:
return False
update.wait(10)
assert all_children == []
update.clear()
fail_through.append(True)
self.client.create(self.path + '/' + 'smith')
update.wait(10)
assert all_children == ['smith']
update.clear()
self.client.create(self.path + '/' + 'george')
update.wait(0.5)
assert all_children == ['smith']
def test_child_watcher_remove_session_watcher(self):
update = threading.Event()
all_children = ['fred']
fail_through = []
def changed(children):
while all_children:
all_children.pop()
all_children.extend(children)
update.set()
if fail_through:
return False
children_watch = self.client.ChildrenWatch(self.path, changed)
session_watcher = children_watch._session_watcher
update.wait(10)
assert session_watcher in self.client.state_listeners
assert all_children == []
update.clear()
fail_through.append(True)
self.client.create(self.path + '/' + 'smith')
update.wait(10)
assert session_watcher not in self.client.state_listeners
assert all_children == ['smith']
update.clear()
self.client.create(self.path + '/' + 'george')
update.wait(10)
assert session_watcher not in self.client.state_listeners
assert all_children == ['smith']
def test_child_watch_session_loss(self):
update = threading.Event()
all_children = ['fred']
@self.client.ChildrenWatch(self.path)
def changed(children):
while all_children:
all_children.pop()
all_children.extend(children)
update.set()
update.wait(10)
assert all_children == []
update.clear()
self.client.create(self.path + '/' + 'smith')
update.wait(10)
assert all_children == ['smith']
update.clear()
self.expire_session(threading.Event)
self.client.retry(self.client.create,
self.path + '/' + 'george')
update.wait(20)
assert sorted(all_children) == ['george', 'smith']
def test_child_stop_on_session_loss(self):
update = threading.Event()
all_children = ['fred']
@self.client.ChildrenWatch(self.path, allow_session_lost=False)
def changed(children):
while all_children:
all_children.pop()
all_children.extend(children)
update.set()
update.wait(10)
assert all_children == []
update.clear()
self.client.create(self.path + '/' + 'smith')
update.wait(10)
assert all_children == ['smith']
update.clear()
self.expire_session(threading.Event)
self.client.retry(self.client.create,
self.path + '/' + 'george')
update.wait(4)
assert update.is_set() is False
assert all_children == ['smith']
children = self.client.get_children(self.path)
assert sorted(children) == ['george', 'smith']
class KazooPatientChildrenWatcherTests(KazooTestCase):
def setUp(self):
super(KazooPatientChildrenWatcherTests, self).setUp()
self.path = "/" + uuid.uuid4().hex
def _makeOne(self, *args, **kwargs):
from kazoo.recipe.watchers import PatientChildrenWatch
return PatientChildrenWatch(*args, **kwargs)
def test_watch(self):
self.client.ensure_path(self.path)
watcher = self._makeOne(self.client, self.path, 0.1)
result = watcher.start()
children, asy = result.get()
assert len(children) == 0
assert asy.ready() is False
self.client.create(self.path + '/' + 'fred')
asy.get(timeout=1)
assert asy.ready() is True
def test_exception(self):
from kazoo.exceptions import NoNodeError
watcher = self._makeOne(self.client, self.path, 0.1)
result = watcher.start()
with pytest.raises(NoNodeError):
result.get()
def test_watch_iterations(self):
self.client.ensure_path(self.path)
watcher = self._makeOne(self.client, self.path, 0.5)
result = watcher.start()
assert result.ready() is False
time.sleep(0.08)
self.client.create(self.path + '/' + uuid.uuid4().hex)
assert result.ready() is False
time.sleep(0.08)
assert result.ready() is False
self.client.create(self.path + '/' + uuid.uuid4().hex)
time.sleep(0.08)
assert result.ready() is False
children, asy = result.get()
assert len(children) == 2
|
