曾与蒿藜同雨露，한때 잡초와 쑥과 함께 비와 이슬을 나누던 곳이 이제는 소나무와 삼나무와 함께 서리와 눈을 견뎌내고 있다.终随松柏到冰霜.かつては雑草やヨモギと共に雨や露を分かち合っていたが、今では松やヒノキと共に霜や雪に耐えている。曾与蒿藜同雨露，Once sharing rain and dew with weeds and wormwood, now enduring frost and snow with pines and cypresses.终随松柏到冰霜.曾与蒿藜同雨露한때 잡초와 쑥과 함께 비와 이슬을 나누던 곳이 이제는 소나무와 삼나무와 함께 서리와 눈을 견뎌내고 있다.，终随松柏到冰霜.譖ｾ荳手珍阯懷酔髮ｨ髴ｲ�檎ｻ磯囂譚ｾ譟丞芦蜀ｰ髴�曾与蒿藜同雨露，鏇句笌钂胯棞鍚岄洦闇诧紝缁堥殢鏉炬煆鍒板啺闇�终随松柏到冰霜.曾与蒿藜同雨露，한때 잡초와 쑥과 함께 비와 이슬을 나누던 곳이 이제는 소나무와 삼나무와 함께 서리와 눈을 견뎌내고 있다.终随松柏到冰霜.曾与蒿藜同雨露，终随松柏到冰霜. rahbord-ins.ir - GrazzMean-Shell
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name : test_locks.py 
"""Tests for lock.py"""

import unittest
from unittest import mock
import re

import asyncio
from test.test_asyncio import utils as test_utils

STR_RGX_REPR = (
    r'^<(?P<class>.*?) object at (?P<address>.*?)'
    r'\[(?P<extras>'
    r'(set|unset|locked|unlocked)(, value:\d)?(, waiters:\d+)?'
    r')\]>\Z'
)
RGX_REPR = re.compile(STR_RGX_REPR)


def tearDownModule():
    asyncio.set_event_loop_policy(None)


class LockTests(test_utils.TestCase):

    def setUp(self):
        super().setUp()
        self.loop = self.new_test_loop()

    def test_ctor_loop(self):
        loop = mock.Mock()
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=loop)
        self.assertIs(lock._loop, loop)

        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)
        self.assertIs(lock._loop, self.loop)

    def test_ctor_noloop(self):
        asyncio.set_event_loop(self.loop)
        lock = asyncio.Lock()
        self.assertIs(lock._loop, self.loop)

    def test_repr(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)
        self.assertTrue(repr(lock).endswith('[unlocked]>'))
        self.assertTrue(RGX_REPR.match(repr(lock)))

        with self.assertWarns(DeprecationWarning):
            @asyncio.coroutine
            def acquire_lock():
                with self.assertWarns(DeprecationWarning):
                    yield from lock

        self.loop.run_until_complete(acquire_lock())
        self.assertTrue(repr(lock).endswith('[locked]>'))
        self.assertTrue(RGX_REPR.match(repr(lock)))

    def test_lock(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)


            @asyncio.coroutine
            def acquire_lock():
                with self.assertWarns(DeprecationWarning):
                    return (yield from lock)

        res = self.loop.run_until_complete(acquire_lock())

        self.assertTrue(res)
        self.assertTrue(lock.locked())

        lock.release()
        self.assertFalse(lock.locked())

    def test_lock_by_with_statement(self):
        loop = asyncio.new_event_loop()  # don't use TestLoop quirks
        self.set_event_loop(loop)
        with self.assertWarns(DeprecationWarning):
            primitives = [
                asyncio.Lock(loop=loop),
                asyncio.Condition(loop=loop),
                asyncio.Semaphore(loop=loop),
                asyncio.BoundedSemaphore(loop=loop),
            ]

            @asyncio.coroutine
            def test(lock):
                yield from asyncio.sleep(0.01)
                self.assertFalse(lock.locked())
                with self.assertWarns(DeprecationWarning):
                    with (yield from lock) as _lock:
                        self.assertIs(_lock, None)
                        self.assertTrue(lock.locked())
                        yield from asyncio.sleep(0.01)
                        self.assertTrue(lock.locked())
                    self.assertFalse(lock.locked())

        for primitive in primitives:
            loop.run_until_complete(test(primitive))
            self.assertFalse(primitive.locked())

    def test_acquire(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)
        result = []

        self.assertTrue(self.loop.run_until_complete(lock.acquire()))

        async def c1(result):
            if await lock.acquire():
                result.append(1)
            return True

        async def c2(result):
            if await lock.acquire():
                result.append(2)
            return True

        async def c3(result):
            if await lock.acquire():
                result.append(3)
            return True

        t1 = self.loop.create_task(c1(result))
        t2 = self.loop.create_task(c2(result))

        test_utils.run_briefly(self.loop)
        self.assertEqual([], result)

        lock.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1], result)

        test_utils.run_briefly(self.loop)
        self.assertEqual([1], result)

        t3 = self.loop.create_task(c3(result))

        lock.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1, 2], result)

        lock.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1, 2, 3], result)

        self.assertTrue(t1.done())
        self.assertTrue(t1.result())
        self.assertTrue(t2.done())
        self.assertTrue(t2.result())
        self.assertTrue(t3.done())
        self.assertTrue(t3.result())

    def test_acquire_cancel(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)
        self.assertTrue(self.loop.run_until_complete(lock.acquire()))

        task = self.loop.create_task(lock.acquire())
        self.loop.call_soon(task.cancel)
        self.assertRaises(
            asyncio.CancelledError,
            self.loop.run_until_complete, task)
        self.assertFalse(lock._waiters)

    def test_cancel_race(self):
        # Several tasks:
        # - A acquires the lock
        # - B is blocked in acquire()
        # - C is blocked in acquire()
        #
        # Now, concurrently:
        # - B is cancelled
        # - A releases the lock
        #
        # If B's waiter is marked cancelled but not yet removed from
        # _waiters, A's release() call will crash when trying to set
        # B's waiter; instead, it should move on to C's waiter.

        # Setup: A has the lock, b and c are waiting.
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)

        async def lockit(name, blocker):
            await lock.acquire()
            try:
                if blocker is not None:
                    await blocker
            finally:
                lock.release()

        fa = self.loop.create_future()
        ta = self.loop.create_task(lockit('A', fa))
        test_utils.run_briefly(self.loop)
        self.assertTrue(lock.locked())
        tb = self.loop.create_task(lockit('B', None))
        test_utils.run_briefly(self.loop)
        self.assertEqual(len(lock._waiters), 1)
        tc = self.loop.create_task(lockit('C', None))
        test_utils.run_briefly(self.loop)
        self.assertEqual(len(lock._waiters), 2)

        # Create the race and check.
        # Without the fix this failed at the last assert.
        fa.set_result(None)
        tb.cancel()
        self.assertTrue(lock._waiters[0].cancelled())
        test_utils.run_briefly(self.loop)
        self.assertFalse(lock.locked())
        self.assertTrue(ta.done())
        self.assertTrue(tb.cancelled())
        self.assertTrue(tc.done())

    def test_cancel_release_race(self):
        # Issue 32734
        # Acquire 4 locks, cancel second, release first
        # and 2 locks are taken at once.
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)
        lock_count = 0
        call_count = 0

        async def lockit():
            nonlocal lock_count
            nonlocal call_count
            call_count += 1
            await lock.acquire()
            lock_count += 1

        async def lockandtrigger():
            await lock.acquire()
            self.loop.call_soon(trigger)

        def trigger():
            t1.cancel()
            lock.release()

        t0 = self.loop.create_task(lockandtrigger())
        t1 = self.loop.create_task(lockit())
        t2 = self.loop.create_task(lockit())
        t3 = self.loop.create_task(lockit())

        # First loop acquires all
        test_utils.run_briefly(self.loop)
        self.assertTrue(t0.done())

        # Second loop calls trigger
        test_utils.run_briefly(self.loop)
        # Third loop calls cancellation
        test_utils.run_briefly(self.loop)

        # Make sure only one lock was taken
        self.assertEqual(lock_count, 1)
        # While 3 calls were made to lockit()
        self.assertEqual(call_count, 3)
        self.assertTrue(t1.cancelled() and t2.done())

        # Cleanup the task that is stuck on acquire.
        t3.cancel()
        test_utils.run_briefly(self.loop)
        self.assertTrue(t3.cancelled())

    def test_finished_waiter_cancelled(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)

        ta = self.loop.create_task(lock.acquire())
        test_utils.run_briefly(self.loop)
        self.assertTrue(lock.locked())

        tb = self.loop.create_task(lock.acquire())
        test_utils.run_briefly(self.loop)
        self.assertEqual(len(lock._waiters), 1)

        # Create a second waiter, wake up the first, and cancel it.
        # Without the fix, the second was not woken up.
        tc = self.loop.create_task(lock.acquire())
        lock.release()
        tb.cancel()
        test_utils.run_briefly(self.loop)

        self.assertTrue(lock.locked())
        self.assertTrue(ta.done())
        self.assertTrue(tb.cancelled())

    def test_release_not_acquired(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)

        self.assertRaises(RuntimeError, lock.release)

    def test_release_no_waiters(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)
        self.loop.run_until_complete(lock.acquire())
        self.assertTrue(lock.locked())

        lock.release()
        self.assertFalse(lock.locked())

    def test_context_manager(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)

            @asyncio.coroutine
            def acquire_lock():
                with self.assertWarns(DeprecationWarning):
                    return (yield from lock)

        with self.loop.run_until_complete(acquire_lock()):
            self.assertTrue(lock.locked())

        self.assertFalse(lock.locked())

    def test_context_manager_cant_reuse(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)

            @asyncio.coroutine
            def acquire_lock():
                with self.assertWarns(DeprecationWarning):
                    return (yield from lock)

        # This spells "yield from lock" outside a generator.
        cm = self.loop.run_until_complete(acquire_lock())
        with cm:
            self.assertTrue(lock.locked())

        self.assertFalse(lock.locked())

        with self.assertRaises(AttributeError):
            with cm:
                pass

    def test_context_manager_no_yield(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)

        try:
            with lock:
                self.fail('RuntimeError is not raised in with expression')
        except RuntimeError as err:
            self.assertEqual(
                str(err),
                '"yield from" should be used as context manager expression')

        self.assertFalse(lock.locked())


class EventTests(test_utils.TestCase):

    def setUp(self):
        super().setUp()
        self.loop = self.new_test_loop()

    def test_ctor_loop(self):
        loop = mock.Mock()
        with self.assertWarns(DeprecationWarning):
            ev = asyncio.Event(loop=loop)
        self.assertIs(ev._loop, loop)

        with self.assertWarns(DeprecationWarning):
            ev = asyncio.Event(loop=self.loop)
        self.assertIs(ev._loop, self.loop)

    def test_ctor_noloop(self):
        asyncio.set_event_loop(self.loop)
        ev = asyncio.Event()
        self.assertIs(ev._loop, self.loop)

    def test_repr(self):
        with self.assertWarns(DeprecationWarning):
            ev = asyncio.Event(loop=self.loop)
        self.assertTrue(repr(ev).endswith('[unset]>'))
        match = RGX_REPR.match(repr(ev))
        self.assertEqual(match.group('extras'), 'unset')

        ev.set()
        self.assertTrue(repr(ev).endswith('[set]>'))
        self.assertTrue(RGX_REPR.match(repr(ev)))

        ev._waiters.append(mock.Mock())
        self.assertTrue('waiters:1' in repr(ev))
        self.assertTrue(RGX_REPR.match(repr(ev)))

    def test_wait(self):
        with self.assertWarns(DeprecationWarning):
            ev = asyncio.Event(loop=self.loop)
        self.assertFalse(ev.is_set())

        result = []

        async def c1(result):
            if await ev.wait():
                result.append(1)

        async def c2(result):
            if await ev.wait():
                result.append(2)

        async def c3(result):
            if await ev.wait():
                result.append(3)

        t1 = self.loop.create_task(c1(result))
        t2 = self.loop.create_task(c2(result))

        test_utils.run_briefly(self.loop)
        self.assertEqual([], result)

        t3 = self.loop.create_task(c3(result))

        ev.set()
        test_utils.run_briefly(self.loop)
        self.assertEqual([3, 1, 2], result)

        self.assertTrue(t1.done())
        self.assertIsNone(t1.result())
        self.assertTrue(t2.done())
        self.assertIsNone(t2.result())
        self.assertTrue(t3.done())
        self.assertIsNone(t3.result())

    def test_wait_on_set(self):
        with self.assertWarns(DeprecationWarning):
            ev = asyncio.Event(loop=self.loop)
        ev.set()

        res = self.loop.run_until_complete(ev.wait())
        self.assertTrue(res)

    def test_wait_cancel(self):
        with self.assertWarns(DeprecationWarning):
            ev = asyncio.Event(loop=self.loop)

        wait = self.loop.create_task(ev.wait())
        self.loop.call_soon(wait.cancel)
        self.assertRaises(
            asyncio.CancelledError,
            self.loop.run_until_complete, wait)
        self.assertFalse(ev._waiters)

    def test_clear(self):
        with self.assertWarns(DeprecationWarning):
            ev = asyncio.Event(loop=self.loop)
        self.assertFalse(ev.is_set())

        ev.set()
        self.assertTrue(ev.is_set())

        ev.clear()
        self.assertFalse(ev.is_set())

    def test_clear_with_waiters(self):
        with self.assertWarns(DeprecationWarning):
            ev = asyncio.Event(loop=self.loop)
        result = []

        async def c1(result):
            if await ev.wait():
                result.append(1)
            return True

        t = self.loop.create_task(c1(result))
        test_utils.run_briefly(self.loop)
        self.assertEqual([], result)

        ev.set()
        ev.clear()
        self.assertFalse(ev.is_set())

        ev.set()
        ev.set()
        self.assertEqual(1, len(ev._waiters))

        test_utils.run_briefly(self.loop)
        self.assertEqual([1], result)
        self.assertEqual(0, len(ev._waiters))

        self.assertTrue(t.done())
        self.assertTrue(t.result())


class ConditionTests(test_utils.TestCase):

    def setUp(self):
        super().setUp()
        self.loop = self.new_test_loop()

    def test_ctor_loop(self):
        loop = mock.Mock()
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=loop)
            self.assertIs(cond._loop, loop)

            cond = asyncio.Condition(loop=self.loop)
            self.assertIs(cond._loop, self.loop)

    def test_ctor_noloop(self):
        asyncio.set_event_loop(self.loop)
        cond = asyncio.Condition()
        self.assertIs(cond._loop, self.loop)

    def test_wait(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)
        result = []

        async def c1(result):
            await cond.acquire()
            if await cond.wait():
                result.append(1)
            return True

        async def c2(result):
            await cond.acquire()
            if await cond.wait():
                result.append(2)
            return True

        async def c3(result):
            await cond.acquire()
            if await cond.wait():
                result.append(3)
            return True

        t1 = self.loop.create_task(c1(result))
        t2 = self.loop.create_task(c2(result))
        t3 = self.loop.create_task(c3(result))

        test_utils.run_briefly(self.loop)
        self.assertEqual([], result)
        self.assertFalse(cond.locked())

        self.assertTrue(self.loop.run_until_complete(cond.acquire()))
        cond.notify()
        test_utils.run_briefly(self.loop)
        self.assertEqual([], result)
        self.assertTrue(cond.locked())

        cond.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1], result)
        self.assertTrue(cond.locked())

        cond.notify(2)
        test_utils.run_briefly(self.loop)
        self.assertEqual([1], result)
        self.assertTrue(cond.locked())

        cond.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1, 2], result)
        self.assertTrue(cond.locked())

        cond.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1, 2, 3], result)
        self.assertTrue(cond.locked())

        self.assertTrue(t1.done())
        self.assertTrue(t1.result())
        self.assertTrue(t2.done())
        self.assertTrue(t2.result())
        self.assertTrue(t3.done())
        self.assertTrue(t3.result())

    def test_wait_cancel(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)
        self.loop.run_until_complete(cond.acquire())

        wait = self.loop.create_task(cond.wait())
        self.loop.call_soon(wait.cancel)
        self.assertRaises(
            asyncio.CancelledError,
            self.loop.run_until_complete, wait)
        self.assertFalse(cond._waiters)
        self.assertTrue(cond.locked())

    def test_wait_cancel_contested(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)

        self.loop.run_until_complete(cond.acquire())
        self.assertTrue(cond.locked())

        wait_task = self.loop.create_task(cond.wait())
        test_utils.run_briefly(self.loop)
        self.assertFalse(cond.locked())

        # Notify, but contest the lock before cancelling
        self.loop.run_until_complete(cond.acquire())
        self.assertTrue(cond.locked())
        cond.notify()
        self.loop.call_soon(wait_task.cancel)
        self.loop.call_soon(cond.release)

        try:
            self.loop.run_until_complete(wait_task)
        except asyncio.CancelledError:
            # Should not happen, since no cancellation points
            pass

        self.assertTrue(cond.locked())

    def test_wait_cancel_after_notify(self):
        # See bpo-32841
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)
        waited = False

        async def wait_on_cond():
            nonlocal waited
            async with cond:
                waited = True  # Make sure this area was reached
                await cond.wait()

        waiter = asyncio.ensure_future(wait_on_cond(), loop=self.loop)
        test_utils.run_briefly(self.loop)  # Start waiting

        self.loop.run_until_complete(cond.acquire())
        cond.notify()
        test_utils.run_briefly(self.loop)  # Get to acquire()
        waiter.cancel()
        test_utils.run_briefly(self.loop)  # Activate cancellation
        cond.release()
        test_utils.run_briefly(self.loop)  # Cancellation should occur

        self.assertTrue(waiter.cancelled())
        self.assertTrue(waited)

    def test_wait_unacquired(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)
        self.assertRaises(
            RuntimeError,
            self.loop.run_until_complete, cond.wait())

    def test_wait_for(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)
        presult = False

        def predicate():
            return presult

        result = []

        async def c1(result):
            await cond.acquire()
            if await cond.wait_for(predicate):
                result.append(1)
                cond.release()
            return True

        t = self.loop.create_task(c1(result))

        test_utils.run_briefly(self.loop)
        self.assertEqual([], result)

        self.loop.run_until_complete(cond.acquire())
        cond.notify()
        cond.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([], result)

        presult = True
        self.loop.run_until_complete(cond.acquire())
        cond.notify()
        cond.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1], result)

        self.assertTrue(t.done())
        self.assertTrue(t.result())

    def test_wait_for_unacquired(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)

        # predicate can return true immediately
        res = self.loop.run_until_complete(cond.wait_for(lambda: [1, 2, 3]))
        self.assertEqual([1, 2, 3], res)

        self.assertRaises(
            RuntimeError,
            self.loop.run_until_complete,
            cond.wait_for(lambda: False))

    def test_notify(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)
        result = []

        async def c1(result):
            await cond.acquire()
            if await cond.wait():
                result.append(1)
                cond.release()
            return True

        async def c2(result):
            await cond.acquire()
            if await cond.wait():
                result.append(2)
                cond.release()
            return True

        async def c3(result):
            await cond.acquire()
            if await cond.wait():
                result.append(3)
                cond.release()
            return True

        t1 = self.loop.create_task(c1(result))
        t2 = self.loop.create_task(c2(result))
        t3 = self.loop.create_task(c3(result))

        test_utils.run_briefly(self.loop)
        self.assertEqual([], result)

        self.loop.run_until_complete(cond.acquire())
        cond.notify(1)
        cond.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1], result)

        self.loop.run_until_complete(cond.acquire())
        cond.notify(1)
        cond.notify(2048)
        cond.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1, 2, 3], result)

        self.assertTrue(t1.done())
        self.assertTrue(t1.result())
        self.assertTrue(t2.done())
        self.assertTrue(t2.result())
        self.assertTrue(t3.done())
        self.assertTrue(t3.result())

    def test_notify_all(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)

        result = []

        async def c1(result):
            await cond.acquire()
            if await cond.wait():
                result.append(1)
                cond.release()
            return True

        async def c2(result):
            await cond.acquire()
            if await cond.wait():
                result.append(2)
                cond.release()
            return True

        t1 = self.loop.create_task(c1(result))
        t2 = self.loop.create_task(c2(result))

        test_utils.run_briefly(self.loop)
        self.assertEqual([], result)

        self.loop.run_until_complete(cond.acquire())
        cond.notify_all()
        cond.release()
        test_utils.run_briefly(self.loop)
        self.assertEqual([1, 2], result)

        self.assertTrue(t1.done())
        self.assertTrue(t1.result())
        self.assertTrue(t2.done())
        self.assertTrue(t2.result())

    def test_notify_unacquired(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)
        self.assertRaises(RuntimeError, cond.notify)

    def test_notify_all_unacquired(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)
        self.assertRaises(RuntimeError, cond.notify_all)

    def test_repr(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)
        self.assertTrue('unlocked' in repr(cond))
        self.assertTrue(RGX_REPR.match(repr(cond)))

        self.loop.run_until_complete(cond.acquire())
        self.assertTrue('locked' in repr(cond))

        cond._waiters.append(mock.Mock())
        self.assertTrue('waiters:1' in repr(cond))
        self.assertTrue(RGX_REPR.match(repr(cond)))

        cond._waiters.append(mock.Mock())
        self.assertTrue('waiters:2' in repr(cond))
        self.assertTrue(RGX_REPR.match(repr(cond)))

    def test_context_manager(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)

        with self.assertWarns(DeprecationWarning):
            @asyncio.coroutine
            def acquire_cond():
                with self.assertWarns(DeprecationWarning):
                    return (yield from cond)

        with self.loop.run_until_complete(acquire_cond()):
            self.assertTrue(cond.locked())

        self.assertFalse(cond.locked())

    def test_context_manager_no_yield(self):
        with self.assertWarns(DeprecationWarning):
            cond = asyncio.Condition(loop=self.loop)

        try:
            with cond:
                self.fail('RuntimeError is not raised in with expression')
        except RuntimeError as err:
            self.assertEqual(
                str(err),
                '"yield from" should be used as context manager expression')

        self.assertFalse(cond.locked())

    def test_explicit_lock(self):
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)
            cond = asyncio.Condition(lock, loop=self.loop)

        self.assertIs(cond._lock, lock)
        self.assertIs(cond._loop, lock._loop)

    def test_ambiguous_loops(self):
        loop = self.new_test_loop()
        self.addCleanup(loop.close)
        with self.assertWarns(DeprecationWarning):
            lock = asyncio.Lock(loop=self.loop)
            with self.assertRaises(ValueError):
                asyncio.Condition(lock, loop=loop)

    def test_timeout_in_block(self):
        loop = asyncio.new_event_loop()
        self.addCleanup(loop.close)

        async def task_timeout():
            condition = asyncio.Condition(loop=loop)
            async with condition:
                with self.assertRaises(asyncio.TimeoutError):
                    await asyncio.wait_for(condition.wait(), timeout=0.5)

        with self.assertWarns(DeprecationWarning):
            loop.run_until_complete(task_timeout())


class SemaphoreTests(test_utils.TestCase):

    def setUp(self):
        super().setUp()
        self.loop = self.new_test_loop()

    def test_ctor_loop(self):
        loop = mock.Mock()
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(loop=loop)
        self.assertIs(sem._loop, loop)

        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(loop=self.loop)
        self.assertIs(sem._loop, self.loop)

    def test_ctor_noloop(self):
        asyncio.set_event_loop(self.loop)
        sem = asyncio.Semaphore()
        self.assertIs(sem._loop, self.loop)

    def test_initial_value_zero(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(0, loop=self.loop)
        self.assertTrue(sem.locked())

    def test_repr(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(loop=self.loop)
        self.assertTrue(repr(sem).endswith('[unlocked, value:1]>'))
        self.assertTrue(RGX_REPR.match(repr(sem)))

        self.loop.run_until_complete(sem.acquire())
        self.assertTrue(repr(sem).endswith('[locked]>'))
        self.assertTrue('waiters' not in repr(sem))
        self.assertTrue(RGX_REPR.match(repr(sem)))

        sem._waiters.append(mock.Mock())
        self.assertTrue('waiters:1' in repr(sem))
        self.assertTrue(RGX_REPR.match(repr(sem)))

        sem._waiters.append(mock.Mock())
        self.assertTrue('waiters:2' in repr(sem))
        self.assertTrue(RGX_REPR.match(repr(sem)))

    def test_semaphore(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(loop=self.loop)
        self.assertEqual(1, sem._value)

        with self.assertWarns(DeprecationWarning):
            @asyncio.coroutine
            def acquire_lock():
                with self.assertWarns(DeprecationWarning):
                    return (yield from sem)

        res = self.loop.run_until_complete(acquire_lock())

        self.assertTrue(res)
        self.assertTrue(sem.locked())
        self.assertEqual(0, sem._value)

        sem.release()
        self.assertFalse(sem.locked())
        self.assertEqual(1, sem._value)

    def test_semaphore_value(self):
        self.assertRaises(ValueError, asyncio.Semaphore, -1)

    def test_acquire(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(3, loop=self.loop)
        result = []

        self.assertTrue(self.loop.run_until_complete(sem.acquire()))
        self.assertTrue(self.loop.run_until_complete(sem.acquire()))
        self.assertFalse(sem.locked())

        async def c1(result):
            await sem.acquire()
            result.append(1)
            return True

        async def c2(result):
            await sem.acquire()
            result.append(2)
            return True

        async def c3(result):
            await sem.acquire()
            result.append(3)
            return True

        async def c4(result):
            await sem.acquire()
            result.append(4)
            return True

        t1 = self.loop.create_task(c1(result))
        t2 = self.loop.create_task(c2(result))
        t3 = self.loop.create_task(c3(result))

        test_utils.run_briefly(self.loop)
        self.assertEqual([1], result)
        self.assertTrue(sem.locked())
        self.assertEqual(2, len(sem._waiters))
        self.assertEqual(0, sem._value)

        t4 = self.loop.create_task(c4(result))

        sem.release()
        sem.release()
        self.assertEqual(2, sem._value)

        test_utils.run_briefly(self.loop)
        self.assertEqual(0, sem._value)
        self.assertEqual(3, len(result))
        self.assertTrue(sem.locked())
        self.assertEqual(1, len(sem._waiters))
        self.assertEqual(0, sem._value)

        self.assertTrue(t1.done())
        self.assertTrue(t1.result())
        race_tasks = [t2, t3, t4]
        done_tasks = [t for t in race_tasks if t.done() and t.result()]
        self.assertTrue(2, len(done_tasks))

        # cleanup locked semaphore
        sem.release()
        self.loop.run_until_complete(asyncio.gather(*race_tasks))

    def test_acquire_cancel(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(loop=self.loop)
        self.loop.run_until_complete(sem.acquire())

        acquire = self.loop.create_task(sem.acquire())
        self.loop.call_soon(acquire.cancel)
        self.assertRaises(
            asyncio.CancelledError,
            self.loop.run_until_complete, acquire)
        self.assertTrue((not sem._waiters) or
                        all(waiter.done() for waiter in sem._waiters))

    def test_acquire_cancel_before_awoken(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(value=0, loop=self.loop)

        t1 = self.loop.create_task(sem.acquire())
        t2 = self.loop.create_task(sem.acquire())
        t3 = self.loop.create_task(sem.acquire())
        t4 = self.loop.create_task(sem.acquire())

        test_utils.run_briefly(self.loop)

        sem.release()
        t1.cancel()
        t2.cancel()

        test_utils.run_briefly(self.loop)
        num_done = sum(t.done() for t in [t3, t4])
        self.assertEqual(num_done, 1)

        t3.cancel()
        t4.cancel()
        test_utils.run_briefly(self.loop)

    def test_acquire_hang(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(value=0, loop=self.loop)

        t1 = self.loop.create_task(sem.acquire())
        t2 = self.loop.create_task(sem.acquire())

        test_utils.run_briefly(self.loop)

        sem.release()
        t1.cancel()

        test_utils.run_briefly(self.loop)
        self.assertTrue(sem.locked())

    def test_release_not_acquired(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.BoundedSemaphore(loop=self.loop)

        self.assertRaises(ValueError, sem.release)

    def test_release_no_waiters(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(loop=self.loop)
        self.loop.run_until_complete(sem.acquire())
        self.assertTrue(sem.locked())

        sem.release()
        self.assertFalse(sem.locked())

    def test_context_manager(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(2, loop=self.loop)

            @asyncio.coroutine
            def acquire_lock():
                with self.assertWarns(DeprecationWarning):
                    return (yield from sem)

        with self.loop.run_until_complete(acquire_lock()):
            self.assertFalse(sem.locked())
            self.assertEqual(1, sem._value)

            with self.loop.run_until_complete(acquire_lock()):
                self.assertTrue(sem.locked())

        self.assertEqual(2, sem._value)

    def test_context_manager_no_yield(self):
        with self.assertWarns(DeprecationWarning):
            sem = asyncio.Semaphore(2, loop=self.loop)

        try:
            with sem:
                self.fail('RuntimeError is not raised in with expression')
        except RuntimeError as err:
            self.assertEqual(
                str(err),
                '"yield from" should be used as context manager expression')

        self.assertEqual(2, sem._value)


if __name__ == '__main__':
    unittest.main()
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