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import queue
import sched
import threading
import time
import unittest
from test import support
from test.support import threading_helper
TIMEOUT = support.SHORT_TIMEOUT
class Timer:
def __init__(self):
self._cond = threading.Condition()
self._time = 0
self._stop = 0
def time(self):
with self._cond:
return self._time
# increase the time but not beyond the established limit
def sleep(self, t):
assert t >= 0
with self._cond:
t += self._time
while self._stop < t:
self._time = self._stop
self._cond.wait()
self._time = t
# advance time limit for user code
def advance(self, t):
assert t >= 0
with self._cond:
self._stop += t
self._cond.notify_all()
class TestCase(unittest.TestCase):
def test_enter(self):
l = []
fun = lambda x: l.append(x)
scheduler = sched.scheduler(time.time, time.sleep)
for x in [0.5, 0.4, 0.3, 0.2, 0.1]:
z = scheduler.enter(x, 1, fun, (x,))
scheduler.run()
self.assertEqual(l, [0.1, 0.2, 0.3, 0.4, 0.5])
def test_enterabs(self):
l = []
fun = lambda x: l.append(x)
scheduler = sched.scheduler(time.time, time.sleep)
for x in [0.05, 0.04, 0.03, 0.02, 0.01]:
z = scheduler.enterabs(x, 1, fun, (x,))
scheduler.run()
self.assertEqual(l, [0.01, 0.02, 0.03, 0.04, 0.05])
@threading_helper.requires_working_threading()
def test_enter_concurrent(self):
q = queue.Queue()
fun = q.put
timer = Timer()
scheduler = sched.scheduler(timer.time, timer.sleep)
scheduler.enter(1, 1, fun, (1,))
scheduler.enter(3, 1, fun, (3,))
t = threading.Thread(target=scheduler.run)
t.start()
timer.advance(1)
self.assertEqual(q.get(timeout=TIMEOUT), 1)
self.assertTrue(q.empty())
for x in [4, 5, 2]:
z = scheduler.enter(x - 1, 1, fun, (x,))
timer.advance(2)
self.assertEqual(q.get(timeout=TIMEOUT), 2)
self.assertEqual(q.get(timeout=TIMEOUT), 3)
self.assertTrue(q.empty())
timer.advance(1)
self.assertEqual(q.get(timeout=TIMEOUT), 4)
self.assertTrue(q.empty())
timer.advance(1)
self.assertEqual(q.get(timeout=TIMEOUT), 5)
self.assertTrue(q.empty())
timer.advance(1000)
threading_helper.join_thread(t)
self.assertTrue(q.empty())
self.assertEqual(timer.time(), 5)
def test_priority(self):
l = []
fun = lambda x: l.append(x)
scheduler = sched.scheduler(time.time, time.sleep)
cases = [
([1, 2, 3, 4, 5], [1, 2, 3, 4, 5]),
([5, 4, 3, 2, 1], [1, 2, 3, 4, 5]),
([2, 5, 3, 1, 4], [1, 2, 3, 4, 5]),
([1, 2, 3, 2, 1], [1, 1, 2, 2, 3]),
]
for priorities, expected in cases:
with self.subTest(priorities=priorities, expected=expected):
for priority in priorities:
scheduler.enterabs(0.01, priority, fun, (priority,))
scheduler.run()
self.assertEqual(l, expected)
# Cleanup:
self.assertTrue(scheduler.empty())
l.clear()
def test_cancel(self):
l = []
fun = lambda x: l.append(x)
scheduler = sched.scheduler(time.time, time.sleep)
now = time.time()
event1 = scheduler.enterabs(now + 0.01, 1, fun, (0.01,))
event2 = scheduler.enterabs(now + 0.02, 1, fun, (0.02,))
event3 = scheduler.enterabs(now + 0.03, 1, fun, (0.03,))
event4 = scheduler.enterabs(now + 0.04, 1, fun, (0.04,))
event5 = scheduler.enterabs(now + 0.05, 1, fun, (0.05,))
scheduler.cancel(event1)
scheduler.cancel(event5)
scheduler.run()
self.assertEqual(l, [0.02, 0.03, 0.04])
@threading_helper.requires_working_threading()
def test_cancel_concurrent(self):
q = queue.Queue()
fun = q.put
timer = Timer()
scheduler = sched.scheduler(timer.time, timer.sleep)
now = timer.time()
event1 = scheduler.enterabs(now + 1, 1, fun, (1,))
event2 = scheduler.enterabs(now + 2, 1, fun, (2,))
event4 = scheduler.enterabs(now + 4, 1, fun, (4,))
event5 = scheduler.enterabs(now + 5, 1, fun, (5,))
event3 = scheduler.enterabs(now + 3, 1, fun, (3,))
t = threading.Thread(target=scheduler.run)
t.start()
timer.advance(1)
self.assertEqual(q.get(timeout=TIMEOUT), 1)
self.assertTrue(q.empty())
scheduler.cancel(event2)
scheduler.cancel(event5)
timer.advance(1)
self.assertTrue(q.empty())
timer.advance(1)
self.assertEqual(q.get(timeout=TIMEOUT), 3)
self.assertTrue(q.empty())
timer.advance(1)
self.assertEqual(q.get(timeout=TIMEOUT), 4)
self.assertTrue(q.empty())
timer.advance(1000)
threading_helper.join_thread(t)
self.assertTrue(q.empty())
self.assertEqual(timer.time(), 4)
def test_cancel_correct_event(self):
# bpo-19270
events = []
scheduler = sched.scheduler()
scheduler.enterabs(1, 1, events.append, ("a",))
b = scheduler.enterabs(1, 1, events.append, ("b",))
scheduler.enterabs(1, 1, events.append, ("c",))
scheduler.cancel(b)
scheduler.run()
self.assertEqual(events, ["a", "c"])
def test_empty(self):
l = []
fun = lambda x: l.append(x)
scheduler = sched.scheduler(time.time, time.sleep)
self.assertTrue(scheduler.empty())
for x in [0.05, 0.04, 0.03, 0.02, 0.01]:
z = scheduler.enterabs(x, 1, fun, (x,))
self.assertFalse(scheduler.empty())
scheduler.run()
self.assertTrue(scheduler.empty())
def test_queue(self):
l = []
fun = lambda x: l.append(x)
scheduler = sched.scheduler(time.time, time.sleep)
now = time.time()
e5 = scheduler.enterabs(now + 0.05, 1, fun)
e1 = scheduler.enterabs(now + 0.01, 1, fun)
e2 = scheduler.enterabs(now + 0.02, 1, fun)
e4 = scheduler.enterabs(now + 0.04, 1, fun)
e3 = scheduler.enterabs(now + 0.03, 1, fun)
# queue property is supposed to return an order list of
# upcoming events
self.assertEqual(scheduler.queue, [e1, e2, e3, e4, e5])
def test_args_kwargs(self):
seq = []
def fun(*a, **b):
seq.append((a, b))
now = time.time()
scheduler = sched.scheduler(time.time, time.sleep)
scheduler.enterabs(now, 1, fun)
scheduler.enterabs(now, 1, fun, argument=(1, 2))
scheduler.enterabs(now, 1, fun, argument=('a', 'b'))
scheduler.enterabs(now, 1, fun, argument=(1, 2), kwargs={"foo": 3})
scheduler.run()
self.assertCountEqual(seq, [
((), {}),
((1, 2), {}),
(('a', 'b'), {}),
((1, 2), {'foo': 3})
])
def test_run_non_blocking(self):
l = []
fun = lambda x: l.append(x)
scheduler = sched.scheduler(time.time, time.sleep)
for x in [10, 9, 8, 7, 6]:
scheduler.enter(x, 1, fun, (x,))
scheduler.run(blocking=False)
self.assertEqual(l, [])
if __name__ == "__main__":
unittest.main()
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