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# vim:fileencoding=utf-8:noet
from __future__ import (unicode_literals, division, absolute_import, print_function)
import shutil
import os
from time import sleep
from functools import partial
from errno import ENOENT
from powerline.lib.watcher import create_file_watcher, create_tree_watcher, INotifyError
from powerline.lib.watcher.uv import UvNotFound
from powerline import get_fallback_logger
from powerline.lib.monotonic import monotonic
from tests.modules import TestCase, SkipTest
INOTIFY_DIR = 'inotify' + os.path.basename(os.environ.get('PYTHON', ''))
def clear_dir(dir):
for root, dirs, files in list(os.walk(dir, topdown=False)):
for f in files:
os.remove(os.path.join(root, f))
for d in dirs:
os.rmdir(os.path.join(root, d))
def set_watcher_tests(l):
byte_tests = (('bytes', True), ('unicode', False))
for btn, use_bytes in byte_tests:
def test_inotify_file_watcher(self, use_bytes=use_bytes):
try:
w = create_file_watcher(pl=get_fallback_logger(), watcher_type='inotify')
except INotifyError:
raise SkipTest('This test is not suitable for a stat based file watcher')
self.do_test_file_watcher(w, use_bytes)
def test_uv_file_watcher(self, use_bytes=use_bytes):
raise SkipTest('Uv watcher tests are not stable')
try:
w = create_file_watcher(pl=get_fallback_logger(), watcher_type='uv')
except UvNotFound:
raise SkipTest('Pyuv is not available')
self.do_test_file_watcher(w, use_bytes)
def test_inotify_tree_watcher(self, use_bytes=use_bytes):
try:
tw = create_tree_watcher(get_fallback_logger(), watcher_type='inotify')
except INotifyError:
raise SkipTest('INotify is not available')
self.do_test_tree_watcher(tw, use_bytes)
def test_uv_tree_watcher(self, use_bytes=use_bytes):
raise SkipTest('Uv watcher tests are not stable')
try:
tw = create_tree_watcher(get_fallback_logger(), 'uv')
except UvNotFound:
raise SkipTest('Pyuv is not available')
self.do_test_tree_watcher(tw, use_bytes)
def test_inotify_file_watcher_is_watching(self, use_bytes=use_bytes):
try:
w = create_file_watcher(pl=get_fallback_logger(), watcher_type='inotify')
except INotifyError:
raise SkipTest('INotify is not available')
self.do_test_file_watcher_is_watching(w, use_bytes)
def test_stat_file_watcher_is_watching(self, use_bytes=use_bytes):
w = create_file_watcher(pl=get_fallback_logger(), watcher_type='stat')
self.do_test_file_watcher_is_watching(w, use_bytes)
def test_uv_file_watcher_is_watching(self, use_bytes=use_bytes):
try:
w = create_file_watcher(pl=get_fallback_logger(), watcher_type='uv')
except UvNotFound:
raise SkipTest('Pyuv is not available')
self.do_test_file_watcher_is_watching(w, use_bytes)
for wt in ('uv', 'inotify'):
l['test_{0}_file_watcher_{1}'.format(wt, btn)] = locals()['test_{0}_file_watcher'.format(wt)]
l['test_{0}_tree_watcher_{1}'.format(wt, btn)] = locals()['test_{0}_tree_watcher'.format(wt)]
l['test_{0}_file_watcher_is_watching_{1}'.format(wt, btn)] = (
locals()['test_{0}_file_watcher_is_watching'.format(wt)])
l['test_{0}_file_watcher_is_watching_{1}'.format('stat', btn)] = (
locals()['test_{0}_file_watcher_is_watching'.format('stat')])
class TestFilesystemWatchers(TestCase):
def do_test_for_change(self, watcher, path):
st = monotonic()
while monotonic() - st < 1:
if watcher(path):
return
sleep(0.1)
self.fail('The change to {0} was not detected'.format(path))
def do_test_file_watcher(self, w, use_bytes=False):
try:
f1, f2, f3 = map(lambda x: os.path.join(INOTIFY_DIR, 'file%d' % x), (1, 2, 3))
ne = os.path.join(INOTIFY_DIR, 'notexists')
if use_bytes:
f1 = f1.encode('utf-8')
f2 = f2.encode('utf-8')
f3 = f3.encode('utf-8')
ne = ne.encode('utf-8')
with open(f1, 'wb'):
with open(f2, 'wb'):
with open(f3, 'wb'):
pass
self.assertRaises(OSError, w, ne)
self.assertTrue(w(f1))
self.assertTrue(w(f2))
os.utime(f1, None), os.utime(f2, None)
self.do_test_for_change(w, f1)
self.do_test_for_change(w, f2)
# Repeat once
os.utime(f1, None), os.utime(f2, None)
self.do_test_for_change(w, f1)
self.do_test_for_change(w, f2)
# Check that no false changes are reported
self.assertFalse(w(f1), 'Spurious change detected')
self.assertFalse(w(f2), 'Spurious change detected')
# Check that open the file with 'w' triggers a change
with open(f1, 'wb'):
with open(f2, 'wb'):
pass
self.do_test_for_change(w, f1)
self.do_test_for_change(w, f2)
# Check that writing to a file with 'a' triggers a change
with open(f1, 'ab') as f:
f.write(b'1')
self.do_test_for_change(w, f1)
# Check that deleting a file registers as a change
os.unlink(f1)
self.do_test_for_change(w, f1)
# Test that changing the inode of a file does not cause it to stop
# being watched
os.rename(f3, f2)
self.do_test_for_change(w, f2)
self.assertFalse(w(f2), 'Spurious change detected')
os.utime(f2, None)
self.do_test_for_change(w, f2)
finally:
clear_dir(INOTIFY_DIR)
def do_test_tree_watcher(self, tw, use_bytes=False):
try:
inotify_dir = INOTIFY_DIR
subdir = os.path.join(inotify_dir, 'subdir')
t1 = os.path.join(inotify_dir, 'tree1')
ts1 = os.path.join(subdir, 'tree1')
suffix = '1'
f = os.path.join(subdir, 'f')
if use_bytes:
inotify_dir = inotify_dir.encode('utf-8')
subdir = subdir.encode('utf-8')
t1 = t1.encode('utf-8')
ts1 = ts1.encode('utf-8')
suffix = suffix.encode('utf-8')
f = f.encode('utf-8')
os.mkdir(subdir)
try:
if tw.watch(inotify_dir).is_dummy:
raise SkipTest('No tree watcher available')
except UvNotFound:
raise SkipTest('Pyuv is not available')
except INotifyError:
raise SkipTest('INotify is not available')
self.assertTrue(tw(inotify_dir))
self.assertFalse(tw(inotify_dir))
changed = partial(self.do_test_for_change, tw, inotify_dir)
open(t1, 'w').close()
changed()
open(ts1, 'w').close()
changed()
os.unlink(ts1)
changed()
os.rmdir(subdir)
changed()
os.mkdir(subdir)
changed()
os.rename(subdir, subdir + suffix)
changed()
shutil.rmtree(subdir + suffix)
changed()
os.mkdir(subdir)
open(f, 'w').close()
changed()
with open(f, 'a') as s:
s.write(' ')
changed()
os.rename(f, f + suffix)
changed()
finally:
clear_dir(inotify_dir)
def do_test_file_watcher_is_watching(self, w, use_bytes=False):
try:
f1, f2, f3 = map(lambda x: os.path.join(INOTIFY_DIR, 'file%d' % x), (1, 2, 3))
ne = os.path.join(INOTIFY_DIR, 'notexists')
if use_bytes:
f1 = f1.encode('utf-8')
f2 = f2.encode('utf-8')
f3 = f3.encode('utf-8')
ne = ne.encode('utf-8')
with open(f1, 'wb'):
with open(f2, 'wb'):
with open(f3, 'wb'):
pass
self.assertRaises(OSError, w, ne)
try:
w(ne)
except OSError as e:
self.assertEqual(e.errno, ENOENT)
self.assertTrue(w(f1))
self.assertFalse(w.is_watching(ne))
self.assertTrue(w.is_watching(f1))
self.assertFalse(w.is_watching(f2))
finally:
clear_dir(INOTIFY_DIR)
set_watcher_tests(locals())
old_cwd = None
def setUpModule():
global old_cwd
old_cwd = os.getcwd()
os.chdir(os.path.dirname(os.path.dirname(__file__)))
os.mkdir(INOTIFY_DIR)
def tearDownModule():
shutil.rmtree(INOTIFY_DIR)
os.chdir(old_cwd)
if __name__ == '__main__':
from tests.modules import main
main()
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