def test_should_wait_to_notify_until_file_is_closed():
try:
# Given a file
file_path = "/tmp/file_path"
FILE = open(file_path,"w")
FILE.write("foo")
FILE.close()
# FileObserver will observe file for changes
file_observer = FileObserver(file_path)
# For speediness we want to keep the timeouts as short as possible
file_observer.POLLING_FREQUENCY_IN_SECONDS = 0
file_observer.GRACE_TIME_IN_SECONDS = 1
# Listener will get noticed by FileObserver when file is updated
listener = Listener()
file_observer.register_listener(listener)
file_observer.start_observe()
time.sleep(1)
# Here we're simulating someone writing to the file
FILE = open(file_path,"w")
FILE.write("bar")
# Assert that the file is still open
eq_(False, FILE.closed)
# Sleep and check Listener for messages (should be nothing)
time.sleep(1)
eq_(0, len(listener.messages))
# Close the file and wait till grace time has passed
FILE.close()
time.sleep(1)
# Now the listener should have received an update
eq_("file changed", listener.message)
eq_(1, len(listener.messages))
finally:
if FILE and not FILE.closed:
FILE.close()
if file_observer:
file_observer.stop_observe()
def test_notify():
file_path = "/tmp/file_path"
FILE = open(file_path,"w")
FILE.write("foo")
FILE.close()
file_observer = FileObserver(file_path)
file_observer.POLLING_FREQUENCY_IN_SECONDS = 0
file_observer.GRACE_TIME_IN_SECONDS = 0
listener = Listener()
file_observer.register_listener(listener)
file_observer.start_observe()
time.sleep(1)
FILE = open(file_path,"w")
FILE.write("bar")
FILE.close()
time.sleep(1)
file_observer.stop_observe()
eq_("file changed", listener.message)