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import unittest
from threading import Thread, Barrier
from itertools import batched, cycle
from test.support import threading_helper
threading_helper.requires_working_threading(module=True)
class ItertoolsThreading(unittest.TestCase):
@threading_helper.reap_threads
def test_batched(self):
number_of_threads = 10
number_of_iterations = 20
barrier = Barrier(number_of_threads)
def work(it):
barrier.wait()
while True:
try:
_ = next(it)
except StopIteration:
break
data = tuple(range(1000))
for it in range(number_of_iterations):
batch_iterator = batched(data, 2)
worker_threads = []
for ii in range(number_of_threads):
worker_threads.append(
Thread(target=work, args=[batch_iterator]))
with threading_helper.start_threads(worker_threads):
pass
barrier.reset()
@threading_helper.reap_threads
def test_cycle(self):
number_of_threads = 6
number_of_iterations = 10
number_of_cycles = 400
barrier = Barrier(number_of_threads)
def work(it):
barrier.wait()
for _ in range(number_of_cycles):
_ = next(it)
data = (1, 2, 3, 4)
for it in range(number_of_iterations):
cycle_iterator = cycle(data)
worker_threads = []
for ii in range(number_of_threads):
worker_threads.append(
Thread(target=work, args=[cycle_iterator]))
with threading_helper.start_threads(worker_threads):
pass
barrier.reset()
if __name__ == "__main__":
unittest.main()
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