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##
# Copyright (c) 2013-2016 Apple Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
##
"""
Tests for L{twext.internet.fswatch}.
"""
from twext.internet.fswatch import (
DirectoryChangeListener, patchReactor, IDirectoryChangeListenee
)
from twisted.internet.kqreactor import KQueueReactor
from twisted.python.filepath import FilePath
from twisted.trial.unittest import TestCase
from zope.interface import implements
class KQueueReactorTestFixture(object):
def __init__(self, testCase, action=None, timeout=10):
"""
Creates a kqueue reactor for use in unit tests. The reactor is patched
with the vnode event handler. Once the reactor is running, it will
call a supplied method. It's expected that the method will ultimately
trigger the stop() of the reactor. The reactor will time out after 10
seconds.
@param testCase: a test method which is needed for adding cleanup to
@param action: a method which will get called after the reactor is
running
@param timeout: how many seconds to keep the reactor running before
giving up and stopping it
"""
self.testCase = testCase
self.reactor = KQueueReactor()
patchReactor(self.reactor)
self.action = action
self.timeout = timeout
def maybeStop():
if self.reactor.running:
return self.reactor.stop()
self.testCase.addCleanup(maybeStop)
def runReactor(self):
"""
Run the test reactor, adding cleanup code to stop if after a timeout,
and calling the action method
"""
def getReadyToStop():
self.reactor.callLater(self.timeout, self.reactor.stop)
self.reactor.callWhenRunning(getReadyToStop)
if self.action is not None:
self.reactor.callWhenRunning(self.action)
self.reactor.run(installSignalHandlers=False)
class DataStoreMonitor(object):
"""
Stub IDirectoryChangeListenee
"""
implements(IDirectoryChangeListenee)
def __init__(self, reactor, storageService):
"""
@param storageService: the service making use of the DataStore
directory; we send it a hardStop() to shut it down
"""
self._reactor = reactor
self._storageService = storageService
self.methodCalled = ""
def disconnected(self):
self.methodCalled = "disconnected"
self._storageService.hardStop()
self._reactor.stop()
def deleted(self):
self.methodCalled = "deleted"
self._storageService.hardStop()
self._reactor.stop()
def renamed(self):
self.methodCalled = "renamed"
self._storageService.hardStop()
self._reactor.stop()
def connectionLost(self, reason):
pass
class StubStorageService(object):
"""
Implements hardStop for testing
"""
def __init__(self, ignored):
self.stopCalled = False
def hardStop(self):
self.stopCalled = True
class DirectoryChangeListenerTestCase(TestCase):
def test_delete(self):
"""
Verify directory deletions can be monitored
"""
self.tmpdir = FilePath(self.mktemp())
self.tmpdir.makedirs()
def deleteAction():
self.tmpdir.remove()
resource = KQueueReactorTestFixture(self, deleteAction)
storageService = StubStorageService(resource.reactor)
delegate = DataStoreMonitor(resource.reactor, storageService)
dcl = DirectoryChangeListener(resource.reactor, self.tmpdir.path, delegate)
dcl.startListening()
resource.runReactor()
self.assertTrue(storageService.stopCalled)
self.assertEquals(delegate.methodCalled, "deleted")
def test_rename(self):
"""
Verify directory renames can be monitored
"""
self.tmpdir = FilePath(self.mktemp())
self.tmpdir.makedirs()
def renameAction():
self.tmpdir.moveTo(FilePath(self.mktemp()))
resource = KQueueReactorTestFixture(self, renameAction)
storageService = StubStorageService(resource.reactor)
delegate = DataStoreMonitor(resource.reactor, storageService)
dcl = DirectoryChangeListener(resource.reactor, self.tmpdir.path, delegate)
dcl.startListening()
resource.runReactor()
self.assertTrue(storageService.stopCalled)
self.assertEquals(delegate.methodCalled, "renamed")
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