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test_inotify_buffer.py
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test_inotify_buffer.py
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# coding: utf-8
#
# Copyright 2014 Thomas Amland <thomas.amland@gmail.com>
#
# 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.
import pytest
from watchdog.utils import platform
if not platform.is_linux(): # noqa
pytest.skip("GNU/Linux only.", allow_module_level=True) # noqa
import os
import random
import time
from watchdog.observers.inotify_buffer import InotifyBuffer
from .shell import mkdir, touch, mv, rm, mount_tmpfs, unmount
def wait_for_move_event(read_event):
while True:
event = read_event()
if isinstance(event, tuple) or event.is_move:
return event
@pytest.mark.timeout(5)
def test_move_from(p):
mkdir(p('dir1'))
mkdir(p('dir2'))
touch(p('dir1', 'a'))
inotify = InotifyBuffer(p('dir1').encode())
mv(p('dir1', 'a'), p('dir2', 'b'))
event = wait_for_move_event(inotify.read_event)
assert event.is_moved_from
assert event.src_path == p('dir1', 'a').encode()
inotify.close()
@pytest.mark.timeout(5)
def test_move_to(p):
mkdir(p('dir1'))
mkdir(p('dir2'))
touch(p('dir1', 'a'))
inotify = InotifyBuffer(p('dir2').encode())
mv(p('dir1', 'a'), p('dir2', 'b'))
event = wait_for_move_event(inotify.read_event)
assert event.is_moved_to
assert event.src_path == p('dir2', 'b').encode()
inotify.close()
@pytest.mark.timeout(5)
def test_move_internal(p):
mkdir(p('dir1'))
mkdir(p('dir2'))
touch(p('dir1', 'a'))
inotify = InotifyBuffer(p('').encode(), recursive=True)
mv(p('dir1', 'a'), p('dir2', 'b'))
frm, to = wait_for_move_event(inotify.read_event)
assert frm.src_path == p('dir1', 'a').encode()
assert to.src_path == p('dir2', 'b').encode()
inotify.close()
@pytest.mark.timeout(10)
def test_move_internal_batch(p):
n = 100
mkdir(p('dir1'))
mkdir(p('dir2'))
files = ['%d' % i for i in range(n)]
for f in files:
touch(p('dir1', f))
inotify = InotifyBuffer(p('').encode(), recursive=True)
random.shuffle(files)
for f in files:
mv(p('dir1', f), p('dir2', f))
# Check that all n events are paired
i = 0
while i < n:
frm, to = wait_for_move_event(inotify.read_event)
assert os.path.dirname(frm.src_path).endswith(b'/dir1')
assert os.path.dirname(to.src_path).endswith(b'/dir2')
assert frm.name == to.name
i += 1
inotify.close()
@pytest.mark.timeout(5)
def test_delete_watched_directory(p):
mkdir(p('dir'))
inotify = InotifyBuffer(p('dir').encode())
rm(p('dir'), recursive=True)
# Wait for the event to be picked up
inotify.read_event()
# Ensure InotifyBuffer shuts down cleanly without raising an exception
inotify.close()
@pytest.mark.timeout(5)
def test_unmount_watched_directory_filesystem(p):
mkdir(p('dir1'))
mount_tmpfs(p('dir1'))
mkdir(p('dir1/dir2'))
inotify = InotifyBuffer(p('dir1/dir2').encode())
unmount(p('dir1'))
# Wait for the event to be picked up
inotify.read_event()
# Ensure InotifyBuffer shuts down cleanly without raising an exception
inotify.close()
assert not inotify.is_alive()
def delay_call(function, seconds):
def delayed(*args, **kwargs):
time.sleep(seconds)
return function(*args, **kwargs)
return delayed
class InotifyBufferDelayedRead(InotifyBuffer):
def run(self, *args, **kwargs):
# Introduce a delay to trigger the race condition where the file descriptor is
# closed prior to a read being triggered.
self._inotify.read_events = delay_call(function=self._inotify.read_events, seconds=1)
return super().run(*args, **kwargs)
@pytest.mark.parametrize(argnames="cls", argvalues=[InotifyBuffer, InotifyBufferDelayedRead])
def test_close_should_terminate_thread(p, cls):
inotify = cls(p('').encode(), recursive=True)
assert inotify.is_alive()
inotify.close()
assert not inotify.is_alive()