def test_cancel_pre_start(self):
"""Check that canceller is not called if cancelled before starting."""
self.cancelled = 0
fs = {}
f1 = ProgressiveFuture()
f1.task_canceller = self.cancel_task
f2 = ProgressiveFuture()
f2.task_canceller = self.cancel_task
fs[f1] = 10 # estimated duration in seconds
fs[f2] = 15 # estimated duration in seconds
batch_future = ProgressiveBatchFuture(fs)
self.assertEqual(self.cancelled, 0)
# try to cancel before running
self.assertTrue(batch_future.cancel())
self.assertTrue(
batch_future.cancelled()) # check batch future cancelled
for f in fs: # check all sub-futures are cancelled
self.assertTrue(f.cancelled())
with self.assertRaises(CancelledError): # check result batch future
batch_future.result(timeout=5)
for f in fs: # check result for sub-futures
with self.assertRaises(CancelledError):
f.result(timeout=5)
self.assertTrue(batch_future.cancel()) # it's ok to cancel twice
self.assertEqual(self.cancelled, 0)
def test_cancel_while_running(self):
"""Cancel batch future while running."""
self.cancelled = 0
fs = {}
f1 = ProgressiveFuture()
f1.task_canceller = self.cancel_task
f2 = ProgressiveFuture()
f2.task_canceller = self.cancel_task
fs[f1] = 10 # estimated duration in seconds
fs[f2] = 15 # estimated duration in seconds
batch_future = ProgressiveBatchFuture(fs)
# "start" the sub-task; the batch task is already started at creation
f1.set_running_or_notify_cancel()
self.assertEqual(self.cancelled, 0)
# try to cancel while running
self.assertTrue(batch_future.cancel())
self.assertTrue(
batch_future.cancelled()) # check batch future cancelled
for f in fs: # check all sub-futures are cancelled
self.assertTrue(f.cancelled())
with self.assertRaises(CancelledError): # check result batch future
batch_future.result(timeout=5)
for f in fs: # check result for sub-futures
with self.assertRaises(CancelledError):
f.result(timeout=5)
# only one sub-future should trigger the callback (the other future is not running yet or already finished)
self.assertEqual(self.cancelled,
1) # one sub-futures should be cancelled
def test_progress(self):
"""Test progress update of future."""
self.start = None # for the caller
self.end = None # for the caller
fs = {}
f1 = ProgressiveFuture()
f1.task_canceller = self.cancel_task
f2 = ProgressiveFuture()
f2.task_canceller = self.cancel_task
fs[f1] = 10 # estimated duration in seconds
fs[f2] = 15 # estimated duration in seconds
time_creation_batch_future = time.time()
batch_future = ProgressiveBatchFuture(fs)
batch_future.add_update_callback(self.on_progress_update)
# check estimated time for batch future is sum of estimated time for sub-futures
self.assertEqual(self.end - self.start, fs[f1] + fs[f2])
# "start" the sub-tasks; the batch task is already started at creation
f1.set_running_or_notify_cancel()
now = time.time()
f1.set_progress(end=now + 2) # update the progress on one sub-future
# check that the estimated end time of the batch futures has been updated
expected_end = now + fs[f2] + 2
self.assertTrue(expected_end - 0.1 <= self.end <= expected_end + 0.1)
# check that the start of the batch future is after creation of batch future
self.assertGreaterEqual(self.start, time_creation_batch_future)
now = time.time()
f1.set_result(None) # set sub-future done
# check estimated time of batch future is equal to f2
expected_end = now + fs[f2]
self.assertTrue(expected_end - 0.1 <= self.end <= expected_end + 0.1)
f2.set_running_or_notify_cancel()
# check time of batch future is still equal to f2 as future just started
expected_end = now + fs[f2]
self.assertTrue(expected_end - 0.1 <= self.end <= expected_end + 0.1)
now = time.time()
f2.set_progress(end=now + 10) # update the progress on one sub-future
# check that the estimated end time of the batch futures has been updated
expected_end = now + 10
self.assertTrue(expected_end - 0.1 <= self.end <= expected_end + 0.1)
f2.set_result(None) # set sub-future done
# check batch future automatically finished when all sub-futures finished
self.assertTrue(batch_future.done())
self.assertIsNone(
batch_future.result()) # result of successful batch future is None
def testProgressiveFuture(self):
"""
Only tests a simple ProgressiveFuture
"""
self.cancelled = 0
self.start = None
self.end = None
future = ProgressiveFuture()
future.task_canceller = self.cancel_task
now = time.time()
# try to update progress
future.set_progress(end=now + 1)
future.add_update_callback(self.on_progress_update)
future.set_progress(end=now + 2) # should say about 2 s left
self.assertEqual(self.end, now + 2)
# before being started, start should always be (a bit) in the future
self.assertGreaterEqual(self.start, now)
# "start" the task
future.set_running_or_notify_cancel()
self.assertTrue(0 <= time.time() - self.start < 0.1)
time.sleep(0.1)
now = time.time()
future.set_progress(end=now + 1)
self.assertTrue(0.9 <= self.end - time.time() < 1)
# try to cancel while running
future.cancel()
self.assertTrue(future.cancelled())
self.assertRaises(CancelledError, future.result, 1)
self.assertLessEqual(self.end, time.time())
self.assertEqual(self.cancelled, 1)
def testProgressiveFuture(self):
"""
Only tests a simple ProgressiveFuture
"""
self.cancelled = 0
self.start = None
self.end = None
future = ProgressiveFuture()
future.task_canceller = self.cancel_task
now = time.time()
# try to update progress
future.set_progress(end=now + 1)
future.add_update_callback(self.on_progress_update)
future.set_progress(end=now + 2) # should say about 2 s left
self.assertEqual(self.end, now + 2)
# before being started, start should always be (a bit) in the future
self.assertGreaterEqual(self.start, now)
# "start" the task
future.set_running_or_notify_cancel()
self.assertTrue(0 <= time.time() - self.start < 0.1)
time.sleep(0.1)
now = time.time()
future.set_progress(end=now + 1)
self.assertTrue(0.9 <= self.end - time.time() < 1)
# try to cancel while running
future.cancel()
self.assertTrue(future.cancelled())
self.assertRaises(CancelledError, future.result, 1)
self.assertLessEqual(self.end, time.time())
self.assertEqual(self.cancelled, 1)
def testProgressiveFuture(self):
"""
Only tests a simple ProgressiveFuture
"""
self.cancelled = 0
self.past = None
self.left = None
future = ProgressiveFuture()
future.task_canceller = self.cancel_task
now = time.time()
# try to update progress
future.set_end_time(now + 1)
future.add_update_callback(self.on_progress_update)
future.set_end_time(now + 2) # should say about 2 s left
self.assertTrue(1.9 <= self.left < 2)
self.assertLessEqual(self.past, 0)
# "start" the task
future.set_running_or_notify_cancel()
self.assertTrue(0 <= self.past < 0.1)
time.sleep(0.1)
now = time.time()
future.set_end_time(now + 1)
self.assertTrue(0.9 <= self.left < 1)
# try to cancel while running
future.cancel()
self.assertTrue(future.cancelled())
self.assertRaises(CancelledError, future.result, 1)
self.assertEqual(self.left, 0)
self.assertEqual(self.cancelled, 1)
def test_progress(self):
"""Test progress update for future."""
self.start = None # for the caller
self.end = None # for the caller
now = time.time()
# start is default time now if not specified
future = ProgressiveFuture(end=now + 1)
future.task_canceller = self.cancel_task
# caller request future to indicate change in time estimation
future.add_update_callback(self.on_progress_update)
# update the progress
future.set_progress(end=now + 2)
# check end time was updated
self.assertEqual(self.end, now + 2)
# future not running yet, so start should be after "now"
self.assertGreaterEqual(self.start, now)
# "start" the task (set the future running)
future.set_running_or_notify_cancel()
# the progress should be updated and thus .start should be updated now with the current time
expected_start = time.time()
self.assertTrue(expected_start - 0.1 <= self.start <= expected_start)
time.sleep(0.1) # wait a bit
now = time.time()
# while running, update the estimated ending time
future.set_progress(end=now + 1)
# the progress should be updated and thus .end should be in 1 sec from now
expected_end = now + 1
self.assertTrue(expected_end - 0.1 <= self.end <= expected_end)
def testProgressiveFuture(self):
"""
Only tests a simple ProgressiveFuture
"""
self.cancelled = 0
self.past = None
self.left = None
future = ProgressiveFuture()
future.task_canceller = self.cancel_task
now = time.time()
# try to update progress
future.set_end_time(now + 1)
future.add_update_callback(self.on_progress_update)
future.set_end_time(now + 2) # should say about 2 s left
self.assertTrue(1.9 <= self.left < 2)
self.assertLessEqual(self.past, 0)
# "start" the task
future.set_running_or_notify_cancel()
self.assertTrue(0 <= self.past < 0.1)
time.sleep(0.1)
now = time.time()
future.set_end_time(now + 1)
self.assertTrue(0.9 <= self.left < 1)
# try to cancel while running
future.cancel()
self.assertTrue(future.cancelled())
self.assertRaises(CancelledError, future.result, 1)
self.assertEqual(self.left, 0)
self.assertEqual(self.cancelled, 1)
def test_cancel_post_end(self):
"""Check that canceller is not called if cancelled after end."""
self.cancelled = 0
fs = {}
f1 = ProgressiveFuture()
f1.task_canceller = self.cancel_task
f2 = ProgressiveFuture()
f2.task_canceller = self.cancel_task
fs[f1] = 10 # estimated duration in seconds
fs[f2] = 15 # estimated duration in seconds
batch_future = ProgressiveBatchFuture(fs)
# "start" the sub-tasks; the batch task is already started at creation
# (Note: typically only one sub-future is run at a time)
f1.set_running_or_notify_cancel()
f2.set_running_or_notify_cancel()
self.assertEqual(self.cancelled, 0)
# "end" the sub-futures
f1.set_result(1)
f2.set_result(2)
# check batch future automatically finished when all sub-futures finished
self.assertTrue(batch_future.done())
self.assertIsNone(
batch_future.result()) # result of successful batch future is None
self.assertEqual(f1.result(), 1)
self.assertEqual(f2.result(), 2)
# try to cancel after end
self.assertFalse(batch_future.cancel())
self.assertFalse(
batch_future.cancelled()) # check batch future is not cancelled
for f in fs: # check all sub-futures are not cancelled
self.assertFalse(f.cancelled())
# The result shouldn't change
self.assertIsNone(batch_future.result())
self.assertEqual(f1.result(), 1)
self.assertEqual(f2.result(), 2)
self.assertEqual(self.cancelled, 0)
def test_cancel_while_running(self):
"""Test cancelling of future while running."""
self.cancelled = 0
self.start = None # for the caller
self.end = None # for the caller
now = time.time()
# start is default time now if not specified
future = ProgressiveFuture(end=now + 2)
future.task_canceller = self.cancel_task
# "start" the task (set the future running)
future.set_running_or_notify_cancel()
time.sleep(0.1) # wait a bit
future.cancel()
self.assertTrue(future.cancelled())
with self.assertRaises(CancelledError):
future.result(timeout=5)
self.assertEqual(self.cancelled, 1)
