def test_priority(self):
threads = []
t1 = time.time_ns()
threads.append(create_thread(self.f3))
threads.append(create_thread(self.f2))
threads.append(create_thread(self.f1))
concurrent.futures.wait(threads)
t2 = time.time_ns()
delta = (t2 - t1) * (10**-9)
self.assertGreaterEqual(delta, 5)
self.assertLessEqual(delta, 5.5)
self.assertEqual((1, 2, 3), tuple(results))
def create_process(func: Callable, *args: Any, **kwargs: Any) -> Future:
'''
Calls a function in its own process
:param func: The function to be called
:param args: The function arguments
:param kwargs: The function keyword arguments
:return: The created Future object, from which we can call 'result()' to get the function return value.
'''
tp = ProcessPoolExecutor(max_workers=1)
future = tp.submit(func, *args, **kwargs)
create_thread(tp.shutdown, wait=True) # Necessary since wait=False is broken
return future
def test_m2_three_seconds_three_processes(self):
threads = []
t1 = time.time_ns()
for _ in range(3):
threads.append(create_thread(self.m2_three_seconds_three_threads))
concurrent.futures.wait(threads)
t2 = time.time_ns()
delta = (t2 - t1) * (10**-9)
self.assertGreaterEqual(delta, 3)
self.assertLessEqual(delta, 3.5)