def test_runner_secures_observer_against_additional_data_after_observer_is_done(
observer_runner):
"""Done observer should not get data even before unsubscribe from moler-connection"""
# correctly written observer looks like:
#
# def data_received(self, data):
# if not self.done():
# parse(data)
#
# This test checks if runners secure wrong-written-observers with missing 'if not self.done():'
from moler.connection import ObservableConnection
with disabled_logging():
for n in range(
20
): # need to test multiple times to ensure there are no thread races
moler_conn = ObservableConnection()
net_down_detector = NetworkDownDetector(connection=moler_conn,
runner=observer_runner)
net_down_detector.start_time = time.time(
) # must start observer lifetime before runner.submit()
connection = net_down_detector.connection
net_down_detector.start_time = time.time()
observer_runner.submit(net_down_detector)
connection.data_received("61 bytes")
connection.data_received("ping: Network is unreachable")
connection.data_received("62 bytes")
assert net_down_detector.all_data_received == [
"61 bytes", "ping: Network is unreachable"
]
async def test_observer_gets_all_data_of_connection_after_it_is_submitted_to_background(
observer_runner):
# another words: after returning from runner.submit() no data can be lost, no races
# Raw 'def' usage note:
# This functionality works as well when runner is used inside raw def function
# since it only uses runner.submit() + awaiting time
# another words - runner is running over some time period
# The only difference is that raw def function may use only standalone_runner (which is subset of observer_runner)
# and inside test you exchange 'await asyncio.sleep()' with 'time.sleep()'
from moler.connection import ObservableConnection
with disabled_logging():
durations = []
for n in range(
20
): # need to test multiple times to ensure there are no thread races
moler_conn = ObservableConnection()
net_down_detector = NetworkDownDetector(connection=moler_conn,
runner=observer_runner)
connection = net_down_detector.connection
start_time = net_down_detector.start_time = time.time()
observer_runner.submit(net_down_detector)
durations.append(time.time() - start_time)
connection.data_received("61 bytes")
connection.data_received("62 bytes")
connection.data_received("ping: Network is unreachable")
assert net_down_detector.all_data_received == [
"61 bytes", "62 bytes", "ping: Network is unreachable"
]
print("\n{}.submit() duration == {}".format(
observer_runner.__class__.__name__,
float(sum(durations)) / len(durations)))