from twisted.internet import reactor
from twisted.internet.defer import gatherResults
from twisted.internet.threads import deferToThread
from twisted.trial.unittest import TestCase
from time import sleep

class Case(TestCase):
    def test_threads(self):
        return start()

def counter(x):
    c = 0
    while True:
        c += x
        print c
        sleep(1)

def start():
    print reactor.getThreadPool().started
    d1 = deferToThread(counter, 2)
    d2 = deferToThread(counter, 5)
    return gatherResults([d1, d2], consumeErrors=True)

if __name__ == '__main__':
    reactor.callWhenRunning(start)
    reactor.run()