def test_multiobject_concurrent_find_not_found():
m = MultiObject(range(10))
ret = m.concurrent_find(lambda n: n < 0)
assert ret is False
m = MultiObject([0] * 5)
ret = m.concurrent_find(lambda n: n)
assert ret is 0
def test_multiobject_concurrent_find_proper_shutdown():
executed = []
m = MultiObject(range(10), workers=1)
ret = m.concurrent_find(lambda n: [print(n) or executed.append(n) or sleep(.01)])
assert ret
sleep(1) # wait for potential stragglers
assert max(executed) <= 2
def test_multiobject_concurrent_find_found():
m = MultiObject(range(10))
from time import sleep
ret = m.concurrent_find(lambda n: sleep(n / 10) or n
) # n==0 is not nonzero, so it's not eligible
assert ret == 1