Add tests for libuv-based watcher
Four possible results of running tests (first three are errors): - “The change to inotify/file2 was not detected” on line 84: most common - “Spurious change detected” at line 82 (uncommon, usually fixed by sleeping before running test in do_test_for_change) - “The change to inotify was not detected” in tree watcher test (e.g. from line 131) (very rare) - All OK.
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@ -2,6 +2,7 @@
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from __future__ import absolute_import, unicode_literals, print_function, division
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from powerline.lib.watcher import create_file_watcher, create_tree_watcher, INotifyError
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from powerline.lib.watcher.uv import UvNotFound
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from powerline import get_fallback_logger
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from powerline.lib.monotonic import monotonic
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@ -16,6 +17,14 @@ from tests import TestCase, SkipTest
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INOTIFY_DIR = 'inotify' + os.environ.get('PYTHON', '')
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def clear_dir(dir):
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for root, dirs, files in list(os.walk(dir, topdown=False)):
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for f in files:
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os.remove(os.path.join(root, f))
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for d in dirs:
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os.rmdir(os.path.join(root, d))
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class TestFilesystemWatchers(TestCase):
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def do_test_for_change(self, watcher, path):
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st = monotonic()
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@ -30,78 +39,104 @@ class TestFilesystemWatchers(TestCase):
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w = create_file_watcher(pl=get_fallback_logger(), watcher_type='inotify')
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except INotifyError:
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raise SkipTest('This test is not suitable for a stat based file watcher')
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f1, f2, f3 = map(lambda x: os.path.join(INOTIFY_DIR, 'file%d' % x), (1, 2, 3))
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with open(f1, 'wb'):
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with open(f2, 'wb'):
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with open(f3, 'wb'):
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return self.do_test_file_watcher(w)
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def do_test_file_watcher(self, w):
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try:
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f1, f2, f3 = map(lambda x: os.path.join(INOTIFY_DIR, 'file%d' % x), (1, 2, 3))
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with open(f1, 'wb'):
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with open(f2, 'wb'):
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with open(f3, 'wb'):
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pass
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ne = os.path.join(INOTIFY_DIR, 'notexists')
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self.assertRaises(OSError, w, ne)
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self.assertTrue(w(f1))
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self.assertTrue(w(f2))
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os.utime(f1, None), os.utime(f2, None)
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self.do_test_for_change(w, f1)
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self.do_test_for_change(w, f2)
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# Repeat once
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os.utime(f1, None), os.utime(f2, None)
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self.do_test_for_change(w, f1)
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self.do_test_for_change(w, f2)
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# Check that no false changes are reported
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self.assertFalse(w(f1), 'Spurious change detected')
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self.assertFalse(w(f2), 'Spurious change detected')
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# Check that open the file with 'w' triggers a change
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with open(f1, 'wb'):
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with open(f2, 'wb'):
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pass
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ne = os.path.join(INOTIFY_DIR, 'notexists')
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self.assertRaises(OSError, w, ne)
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self.assertTrue(w(f1))
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self.assertTrue(w(f2))
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os.utime(f1, None), os.utime(f2, None)
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self.do_test_for_change(w, f1)
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self.do_test_for_change(w, f2)
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# Repeat once
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os.utime(f1, None), os.utime(f2, None)
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self.do_test_for_change(w, f1)
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self.do_test_for_change(w, f2)
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# Check that no false changes are reported
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self.assertFalse(w(f1), 'Spurious change detected')
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self.assertFalse(w(f2), 'Spurious change detected')
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# Check that open the file with 'w' triggers a change
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with open(f1, 'wb'):
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with open(f2, 'wb'):
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pass
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self.do_test_for_change(w, f1)
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self.do_test_for_change(w, f2)
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# Check that writing to a file with 'a' triggers a change
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with open(f1, 'ab') as f:
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f.write(b'1')
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self.do_test_for_change(w, f1)
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# Check that deleting a file registers as a change
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os.unlink(f1)
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self.do_test_for_change(w, f1)
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# Test that changing the inode of a file does not cause it to stop
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# being watched
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os.rename(f3, f2)
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self.do_test_for_change(w, f2)
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self.assertFalse(w(f2), 'Spurious change detected')
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os.utime(f2, None)
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self.do_test_for_change(w, f2)
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self.do_test_for_change(w, f1)
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self.do_test_for_change(w, f2)
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# Check that writing to a file with 'a' triggers a change
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with open(f1, 'ab') as f:
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f.write(b'1')
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self.do_test_for_change(w, f1)
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# Check that deleting a file registers as a change
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os.unlink(f1)
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self.do_test_for_change(w, f1)
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# Test that changing the inode of a file does not cause it to stop
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# being watched
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os.rename(f3, f2)
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self.do_test_for_change(w, f2)
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self.assertFalse(w(f2), 'Spurious change detected')
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os.utime(f2, None)
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self.do_test_for_change(w, f2)
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finally:
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clear_dir(INOTIFY_DIR)
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def test_uv_file_watcher(self):
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try:
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w = create_file_watcher(pl=get_fallback_logger(), watcher_type='uv')
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except UvNotFound:
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raise SkipTest('Pyuv is not available')
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return self.do_test_file_watcher(w)
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def test_tree_watcher(self):
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tw = create_tree_watcher(get_fallback_logger())
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subdir = os.path.join(INOTIFY_DIR, 'subdir')
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os.mkdir(subdir)
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if tw.watch(INOTIFY_DIR).is_dummy:
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raise SkipTest('No tree watcher available')
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self.assertTrue(tw(INOTIFY_DIR))
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self.assertFalse(tw(INOTIFY_DIR))
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changed = partial(self.do_test_for_change, tw, INOTIFY_DIR)
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open(os.path.join(INOTIFY_DIR, 'tree1'), 'w').close()
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changed()
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open(os.path.join(subdir, 'tree1'), 'w').close()
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changed()
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os.unlink(os.path.join(subdir, 'tree1'))
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changed()
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os.rmdir(subdir)
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changed()
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os.mkdir(subdir)
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changed()
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os.rename(subdir, subdir + '1')
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changed()
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shutil.rmtree(subdir + '1')
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changed()
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os.mkdir(subdir)
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f = os.path.join(subdir, 'f')
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open(f, 'w').close()
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changed()
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with open(f, 'a') as s:
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s.write(' ')
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changed()
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os.rename(f, f + '1')
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changed()
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return self.do_test_tree_watcher(tw)
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def do_test_tree_watcher(self, tw):
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try:
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subdir = os.path.join(INOTIFY_DIR, 'subdir')
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os.mkdir(subdir)
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try:
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if tw.watch(INOTIFY_DIR).is_dummy:
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raise SkipTest('No tree watcher available')
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except UvNotFound:
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raise SkipTest('Pyuv is not available')
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self.assertTrue(tw(INOTIFY_DIR))
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self.assertFalse(tw(INOTIFY_DIR))
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changed = partial(self.do_test_for_change, tw, INOTIFY_DIR)
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open(os.path.join(INOTIFY_DIR, 'tree1'), 'w').close()
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changed()
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open(os.path.join(subdir, 'tree1'), 'w').close()
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changed()
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os.unlink(os.path.join(subdir, 'tree1'))
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changed()
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os.rmdir(subdir)
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changed()
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os.mkdir(subdir)
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changed()
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os.rename(subdir, subdir + '1')
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changed()
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shutil.rmtree(subdir + '1')
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changed()
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os.mkdir(subdir)
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f = os.path.join(subdir, 'f')
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open(f, 'w').close()
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changed()
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with open(f, 'a') as s:
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s.write(' ')
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changed()
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os.rename(f, f + '1')
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changed()
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finally:
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clear_dir(INOTIFY_DIR)
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def test_uv_tree_watcher(self):
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tw = create_tree_watcher(get_fallback_logger(), 'uv')
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return self.do_test_tree_watcher(tw)
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old_cwd = None
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@ -116,11 +151,7 @@ def setUpModule():
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def tearDownModule():
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for d in [INOTIFY_DIR]:
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for root, dirs, files in list(os.walk(d, topdown=False)):
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for file in files:
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os.remove(os.path.join(root, file))
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for dir in dirs:
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os.rmdir(os.path.join(root, dir))
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clear_dir(d)
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os.rmdir(d)
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os.chdir(old_cwd)
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