def test_multiple_watchers_same_file(self):
"""Test that we can have multiple watchers of the same file."""
filename = "/this/is/my/file.py"
mod_count = [0.0]
def modify_mock_file():
self.mock_util.path_modification_time = lambda *args: mod_count[0]
self.mock_util.calc_md5_with_blocking_retries = (
lambda _, **kwargs: "%d" % mod_count[0])
ev = events.FileSystemEvent(filename)
ev.event_type = events.EVENT_TYPE_MODIFIED
folder_handler.on_modified(ev)
mod_count[0] += 1.0
cb1 = mock.Mock()
cb2 = mock.Mock()
watcher1 = event_based_path_watcher.EventBasedPathWatcher(
filename, cb1)
watcher2 = event_based_path_watcher.EventBasedPathWatcher(
filename, cb2)
fo = event_based_path_watcher._MultiPathWatcher.get_singleton()
fo._observer.schedule.assert_called_once()
folder_handler = fo._observer.schedule.call_args[0][0]
cb1.assert_not_called()
cb2.assert_not_called()
# "Modify" our file
modify_mock_file()
assert 1 == cb1.call_count
assert 1 == cb2.call_count
# Close watcher1. Only watcher2's callback should be called after this.
watcher1.close()
# Modify our file again
modify_mock_file()
assert 1 == cb1.call_count
assert 2 == cb2.call_count
watcher2.close()
# Modify our file a final time
modify_mock_file()
# Both watchers are now closed, so their callback counts
# should not have increased.
assert 1 == cb1.call_count
assert 2 == cb2.call_count
def test_works_with_directories(self):
"""Test that when a directory is modified, the callback is called."""
cb = mock.Mock()
self.mock_util.path_modification_time = lambda *args: 101.0
self.mock_util.calc_md5_with_blocking_retries = lambda _, **kwargs: "1"
ro = event_based_path_watcher.EventBasedPathWatcher(
"/this/is/my/dir", cb)
fo = event_based_path_watcher._MultiPathWatcher.get_singleton()
fo._observer.schedule.assert_called_once()
folder_handler = fo._observer.schedule.call_args[0][0]
cb.assert_not_called()
self.mock_util.path_modification_time = lambda *args: 102.0
self.mock_util.calc_md5_with_blocking_retries = lambda _, **kwargs: "2"
ev = events.FileSystemEvent("/this/is/my/dir")
ev.event_type = events.EVENT_TYPE_MODIFIED
ev.is_directory = True
folder_handler.on_modified(ev)
cb.assert_called_once()
ro.close()
def test_callback_not_called_if_wrong_event_type(self):
"""Test that we ignore created files."""
cb = mock.Mock()
self.mock_util.path_modification_time = lambda *args: 101.0
self.mock_util.calc_md5_with_blocking_retries = lambda _, **kwargs: "1"
ro = event_based_path_watcher.EventBasedPathWatcher(
"/this/is/my/file.py", cb)
fo = event_based_path_watcher._MultiPathWatcher.get_singleton()
fo._observer.schedule.assert_called_once()
folder_handler = fo._observer.schedule.call_args[0][0]
cb.assert_not_called()
self.mock_util.path_modification_time = lambda *args: 102.0
self.mock_util.calc_md5_with_blocking_retries = lambda _, **kwargs: "2"
ev = events.FileSystemEvent("/this/is/my/file.py")
ev.event_type = events.EVENT_TYPE_DELETED # Wrong type
folder_handler.on_modified(ev)
# This is the test:
cb.assert_not_called()
ro.close()
def test_kwargs_plumbed_to_calc_md5(self):
"""Test that we pass the glob_pattern and allow_nonexistent kwargs to
calc_md5_with_blocking_retries.
`EventBasedPathWatcher`s can be created with optional kwargs allowing
the caller to specify what types of files to watch (when watching a
directory) and whether to allow watchers on paths with no files/dirs.
This test ensures that these optional parameters make it to our hash
calculation helpers across different on_changed events.
"""
cb = mock.Mock()
self.mock_util.path_modification_time = lambda *args: 101.0
self.mock_util.calc_md5_with_blocking_retries = mock.Mock(
return_value="1")
ro = event_based_path_watcher.EventBasedPathWatcher(
"/this/is/my/dir",
cb,
glob_pattern="*.py",
allow_nonexistent=True,
)
fo = event_based_path_watcher._MultiPathWatcher.get_singleton()
fo._observer.schedule.assert_called_once()
folder_handler = fo._observer.schedule.call_args[0][0]
_, kwargs = self.mock_util.calc_md5_with_blocking_retries.call_args
assert kwargs == {"glob_pattern": "*.py", "allow_nonexistent": True}
cb.assert_not_called()
self.mock_util.path_modification_time = lambda *args: 102.0
self.mock_util.calc_md5_with_blocking_retries = mock.Mock(
return_value="3")
ev = events.FileSystemEvent("/this/is/my/dir")
ev.event_type = events.EVENT_TYPE_MODIFIED
ev.is_directory = True
folder_handler.on_modified(ev)
_, kwargs = self.mock_util.calc_md5_with_blocking_retries.call_args
assert kwargs == {"glob_pattern": "*.py", "allow_nonexistent": True}
cb.assert_called_once()
ro.close()