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]
def modify_mock_file():
self.os.stat = lambda x: FakeStat(mod_count[0])
self.mock_util.calc_md5_with_blocking_retries = (
lambda x: "%d" % mod_count[0])
ev = events.FileSystemEvent(filename)
ev.event_type = events.EVENT_TYPE_MODIFIED
folder_handler.on_modified(ev)
mod_count[0] += 1
cb1 = mock.Mock()
cb2 = mock.Mock()
watcher1 = event_based_file_watcher.EventBasedFileWatcher(
filename, cb1)
watcher2 = event_based_file_watcher.EventBasedFileWatcher(
filename, cb2)
fo = event_based_file_watcher._MultiFileWatcher.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_callback_not_called_if_same_mtime(self):
"""Test that we ignore files with same mtime."""
cb = mock.Mock()
self.os.stat = lambda x: FakeStat(101)
self.mock_util.calc_md5_with_blocking_retries = lambda x: "1"
ro = event_based_file_watcher.EventBasedFileWatcher(
"/this/is/my/file.py", cb)
fo = event_based_file_watcher._MultiFileWatcher.get_singleton()
fo._observer.schedule.assert_called_once()
folder_handler = fo._observer.schedule.call_args[0][0]
cb.assert_not_called()
# self.os.stat = lambda x: FakeStat(102) # Same mtime!
self.mock_util.calc_md5_with_blocking_retries = lambda x: "2"
ev = events.FileSystemEvent("/this/is/my/file.py")
ev.event_type = events.EVENT_TYPE_MODIFIED
folder_handler.on_modified(ev)
# This is the test:
cb.assert_not_called()
ro.close()