test_multiprocessing.py 文件源码

def test_main(run=None):
    if sys.platform.startswith("linux"):
        try:
            lock = multiprocessing.RLock()
        except OSError:
            raise unittest.SkipTest("OSError raises on RLock creation, see issue 3111!")

    check_enough_semaphores()

    if run is None:
        from test.test_support import run_unittest as run

    util.get_temp_dir()     # creates temp directory for use by all processes

    multiprocessing.get_logger().setLevel(LOG_LEVEL)

    ProcessesMixin.pool = multiprocessing.Pool(4)
    ThreadsMixin.pool = multiprocessing.dummy.Pool(4)
    ManagerMixin.manager.__init__()
    ManagerMixin.manager.start()
    ManagerMixin.pool = ManagerMixin.manager.Pool(4)

    testcases = (
        sorted(testcases_processes.values(), key=lambda tc:tc.__name__) +
        sorted(testcases_threads.values(), key=lambda tc:tc.__name__) +
        sorted(testcases_manager.values(), key=lambda tc:tc.__name__) +
        testcases_other
        )

    loadTestsFromTestCase = unittest.defaultTestLoader.loadTestsFromTestCase
    suite = unittest.TestSuite(loadTestsFromTestCase(tc) for tc in testcases)
    # (ncoghlan): Whether or not sys.exc_clear is executed by the threading
    # module during these tests is at least platform dependent and possibly
    # non-deterministic on any given platform. So we don't mind if the listed
    # warnings aren't actually raised.
    with test_support.check_py3k_warnings(
            (".+__(get|set)slice__ has been removed", DeprecationWarning),
            (r"sys.exc_clear\(\) not supported", DeprecationWarning),
            quiet=True):
        run(suite)

    ThreadsMixin.pool.terminate()
    ProcessesMixin.pool.terminate()
    ManagerMixin.pool.terminate()
    ManagerMixin.manager.shutdown()

    del ProcessesMixin.pool, ThreadsMixin.pool, ManagerMixin.pool