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#------------------------------------------------------------------------------
# Copyright (c) 2005, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#
# Author: Enthought, Inc.
# Description: <Enthought util package component>
#------------------------------------------------------------------------------
import time
import unittest
from enthought.util.Worker import Worker
def slow_eval(worker, sleep_time):
for i in range(10):
if worker.abort():
return
else:
# pretend to do some intensive computation
time.sleep(sleep_time)
print worker.getName(),' sleeping for: ', sleep_time
return sleep_time
snooze = 0.1
class test_worker_thread(unittest.TestCase):
def test_cancel(self):
start = time.time()
worker = Worker(name = "First EnVisage worker thread")
worker.perform_work(slow_eval, snooze)
worker.start()
time.sleep(3 * snooze)
worker.cancel()
worker = Worker(name = "Second EnVisage worker thread")
worker.perform_work(slow_eval, snooze)
worker.start()
time.sleep(2 * snooze)
worker.cancel()
duration = time.time() - start
self.assert_(duration >= 5.0 * snooze)
self.assert_(duration < 10.0 * snooze)
def test_concurrent(self):
start = time.time()
worker = Worker(name = "First EnVisage worker thread")
worker.perform_work(slow_eval, snooze)
worker.start()
worker = Worker(name = "Second EnVisage worker thread")
worker.perform_work(slow_eval, snooze)
worker.start()
duration = time.time() - start
print duration
# !! todo block on completion and check it is less than twice
# the time for a single thread
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