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725 lines
21 KiB
Python
725 lines
21 KiB
Python
"""Tests for queues.py"""
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import asyncio
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import unittest
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from types import GenericAlias
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def tearDownModule():
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asyncio.set_event_loop_policy(None)
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class QueueBasicTests(unittest.IsolatedAsyncioTestCase):
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async def _test_repr_or_str(self, fn, expect_id):
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"""Test Queue's repr or str.
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fn is repr or str. expect_id is True if we expect the Queue's id to
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appear in fn(Queue()).
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"""
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q = asyncio.Queue()
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self.assertTrue(fn(q).startswith('<Queue'), fn(q))
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id_is_present = hex(id(q)) in fn(q)
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self.assertEqual(expect_id, id_is_present)
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# getters
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q = asyncio.Queue()
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async with asyncio.TaskGroup() as tg:
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# Start a task that waits to get.
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getter = tg.create_task(q.get())
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# Let it start waiting.
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await asyncio.sleep(0)
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self.assertTrue('_getters[1]' in fn(q))
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# resume q.get coroutine to finish generator
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q.put_nowait(0)
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self.assertEqual(0, await getter)
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# putters
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q = asyncio.Queue(maxsize=1)
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async with asyncio.TaskGroup() as tg:
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q.put_nowait(1)
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# Start a task that waits to put.
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putter = tg.create_task(q.put(2))
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# Let it start waiting.
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await asyncio.sleep(0)
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self.assertTrue('_putters[1]' in fn(q))
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# resume q.put coroutine to finish generator
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q.get_nowait()
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self.assertTrue(putter.done())
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q = asyncio.Queue()
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q.put_nowait(1)
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self.assertTrue('_queue=[1]' in fn(q))
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async def test_repr(self):
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await self._test_repr_or_str(repr, True)
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async def test_str(self):
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await self._test_repr_or_str(str, False)
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def test_generic_alias(self):
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q = asyncio.Queue[int]
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self.assertEqual(q.__args__, (int,))
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self.assertIsInstance(q, GenericAlias)
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async def test_empty(self):
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q = asyncio.Queue()
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self.assertTrue(q.empty())
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await q.put(1)
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self.assertFalse(q.empty())
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self.assertEqual(1, await q.get())
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self.assertTrue(q.empty())
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async def test_full(self):
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q = asyncio.Queue()
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self.assertFalse(q.full())
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q = asyncio.Queue(maxsize=1)
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await q.put(1)
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self.assertTrue(q.full())
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async def test_order(self):
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q = asyncio.Queue()
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for i in [1, 3, 2]:
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await q.put(i)
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items = [await q.get() for _ in range(3)]
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self.assertEqual([1, 3, 2], items)
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async def test_maxsize(self):
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q = asyncio.Queue(maxsize=2)
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self.assertEqual(2, q.maxsize)
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have_been_put = []
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async def putter():
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for i in range(3):
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await q.put(i)
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have_been_put.append(i)
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return True
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t = asyncio.create_task(putter())
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for i in range(2):
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await asyncio.sleep(0)
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# The putter is blocked after putting two items.
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self.assertEqual([0, 1], have_been_put)
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self.assertEqual(0, await q.get())
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# Let the putter resume and put last item.
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await asyncio.sleep(0)
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self.assertEqual([0, 1, 2], have_been_put)
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self.assertEqual(1, await q.get())
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self.assertEqual(2, await q.get())
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self.assertTrue(t.done())
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self.assertTrue(t.result())
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class QueueGetTests(unittest.IsolatedAsyncioTestCase):
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async def test_blocking_get(self):
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q = asyncio.Queue()
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q.put_nowait(1)
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self.assertEqual(1, await q.get())
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async def test_get_with_putters(self):
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loop = asyncio.get_running_loop()
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q = asyncio.Queue(1)
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await q.put(1)
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waiter = loop.create_future()
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q._putters.append(waiter)
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self.assertEqual(1, await q.get())
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self.assertTrue(waiter.done())
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self.assertIsNone(waiter.result())
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async def test_blocking_get_wait(self):
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loop = asyncio.get_running_loop()
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q = asyncio.Queue()
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started = asyncio.Event()
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finished = False
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async def queue_get():
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nonlocal finished
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started.set()
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res = await q.get()
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finished = True
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return res
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queue_get_task = asyncio.create_task(queue_get())
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await started.wait()
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self.assertFalse(finished)
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loop.call_later(0.01, q.put_nowait, 1)
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res = await queue_get_task
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self.assertTrue(finished)
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self.assertEqual(1, res)
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def test_nonblocking_get(self):
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q = asyncio.Queue()
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q.put_nowait(1)
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self.assertEqual(1, q.get_nowait())
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def test_nonblocking_get_exception(self):
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q = asyncio.Queue()
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self.assertRaises(asyncio.QueueEmpty, q.get_nowait)
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async def test_get_cancelled_race(self):
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q = asyncio.Queue()
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t1 = asyncio.create_task(q.get())
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t2 = asyncio.create_task(q.get())
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await asyncio.sleep(0)
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t1.cancel()
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await asyncio.sleep(0)
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self.assertTrue(t1.done())
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await q.put('a')
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await asyncio.sleep(0)
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self.assertEqual('a', await t2)
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async def test_get_with_waiting_putters(self):
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q = asyncio.Queue(maxsize=1)
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asyncio.create_task(q.put('a'))
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asyncio.create_task(q.put('b'))
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self.assertEqual(await q.get(), 'a')
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self.assertEqual(await q.get(), 'b')
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async def test_why_are_getters_waiting(self):
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async def consumer(queue, num_expected):
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for _ in range(num_expected):
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await queue.get()
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async def producer(queue, num_items):
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for i in range(num_items):
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await queue.put(i)
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producer_num_items = 5
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q = asyncio.Queue(1)
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async with asyncio.TaskGroup() as tg:
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tg.create_task(producer(q, producer_num_items))
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tg.create_task(consumer(q, producer_num_items))
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async def test_cancelled_getters_not_being_held_in_self_getters(self):
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queue = asyncio.Queue(maxsize=5)
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with self.assertRaises(TimeoutError):
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await asyncio.wait_for(queue.get(), 0.1)
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self.assertEqual(len(queue._getters), 0)
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class QueuePutTests(unittest.IsolatedAsyncioTestCase):
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async def test_blocking_put(self):
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q = asyncio.Queue()
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# No maxsize, won't block.
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await q.put(1)
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self.assertEqual(1, await q.get())
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async def test_blocking_put_wait(self):
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q = asyncio.Queue(maxsize=1)
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started = asyncio.Event()
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finished = False
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async def queue_put():
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nonlocal finished
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started.set()
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await q.put(1)
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await q.put(2)
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finished = True
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loop = asyncio.get_running_loop()
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loop.call_later(0.01, q.get_nowait)
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queue_put_task = asyncio.create_task(queue_put())
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await started.wait()
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self.assertFalse(finished)
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await queue_put_task
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self.assertTrue(finished)
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def test_nonblocking_put(self):
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q = asyncio.Queue()
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q.put_nowait(1)
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self.assertEqual(1, q.get_nowait())
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async def test_get_cancel_drop_one_pending_reader(self):
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q = asyncio.Queue()
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reader = asyncio.create_task(q.get())
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await asyncio.sleep(0)
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q.put_nowait(1)
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q.put_nowait(2)
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reader.cancel()
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try:
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await reader
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except asyncio.CancelledError:
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# try again
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reader = asyncio.create_task(q.get())
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await reader
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result = reader.result()
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# if we get 2, it means 1 got dropped!
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self.assertEqual(1, result)
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async def test_get_cancel_drop_many_pending_readers(self):
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q = asyncio.Queue()
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async with asyncio.TaskGroup() as tg:
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reader1 = tg.create_task(q.get())
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reader2 = tg.create_task(q.get())
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reader3 = tg.create_task(q.get())
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await asyncio.sleep(0)
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q.put_nowait(1)
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q.put_nowait(2)
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reader1.cancel()
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with self.assertRaises(asyncio.CancelledError):
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await reader1
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await reader3
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# It is undefined in which order concurrent readers receive results.
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self.assertEqual({reader2.result(), reader3.result()}, {1, 2})
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async def test_put_cancel_drop(self):
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q = asyncio.Queue(1)
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q.put_nowait(1)
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# putting a second item in the queue has to block (qsize=1)
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writer = asyncio.create_task(q.put(2))
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await asyncio.sleep(0)
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value1 = q.get_nowait()
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self.assertEqual(value1, 1)
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writer.cancel()
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try:
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await writer
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except asyncio.CancelledError:
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# try again
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writer = asyncio.create_task(q.put(2))
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await writer
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value2 = q.get_nowait()
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self.assertEqual(value2, 2)
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self.assertEqual(q.qsize(), 0)
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def test_nonblocking_put_exception(self):
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q = asyncio.Queue(maxsize=1, )
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q.put_nowait(1)
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self.assertRaises(asyncio.QueueFull, q.put_nowait, 2)
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async def test_float_maxsize(self):
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q = asyncio.Queue(maxsize=1.3, )
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q.put_nowait(1)
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q.put_nowait(2)
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self.assertTrue(q.full())
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self.assertRaises(asyncio.QueueFull, q.put_nowait, 3)
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q = asyncio.Queue(maxsize=1.3, )
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await q.put(1)
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await q.put(2)
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self.assertTrue(q.full())
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async def test_put_cancelled(self):
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q = asyncio.Queue()
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async def queue_put():
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await q.put(1)
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return True
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t = asyncio.create_task(queue_put())
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self.assertEqual(1, await q.get())
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self.assertTrue(t.done())
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self.assertTrue(t.result())
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async def test_put_cancelled_race(self):
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q = asyncio.Queue(maxsize=1)
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put_a = asyncio.create_task(q.put('a'))
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put_b = asyncio.create_task(q.put('b'))
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put_c = asyncio.create_task(q.put('X'))
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await asyncio.sleep(0)
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self.assertTrue(put_a.done())
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self.assertFalse(put_b.done())
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put_c.cancel()
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await asyncio.sleep(0)
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self.assertTrue(put_c.done())
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self.assertEqual(q.get_nowait(), 'a')
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await asyncio.sleep(0)
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self.assertEqual(q.get_nowait(), 'b')
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await put_b
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async def test_put_with_waiting_getters(self):
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q = asyncio.Queue()
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t = asyncio.create_task(q.get())
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await asyncio.sleep(0)
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await q.put('a')
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self.assertEqual(await t, 'a')
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async def test_why_are_putters_waiting(self):
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queue = asyncio.Queue(2)
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async def putter(item):
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await queue.put(item)
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async def getter():
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await asyncio.sleep(0)
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num = queue.qsize()
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for _ in range(num):
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queue.get_nowait()
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async with asyncio.TaskGroup() as tg:
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tg.create_task(getter())
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tg.create_task(putter(0))
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tg.create_task(putter(1))
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tg.create_task(putter(2))
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tg.create_task(putter(3))
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async def test_cancelled_puts_not_being_held_in_self_putters(self):
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# Full queue.
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queue = asyncio.Queue(maxsize=1)
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queue.put_nowait(1)
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# Task waiting for space to put an item in the queue.
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put_task = asyncio.create_task(queue.put(1))
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await asyncio.sleep(0)
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# Check that the putter is correctly removed from queue._putters when
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# the task is canceled.
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self.assertEqual(len(queue._putters), 1)
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put_task.cancel()
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with self.assertRaises(asyncio.CancelledError):
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await put_task
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self.assertEqual(len(queue._putters), 0)
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async def test_cancelled_put_silence_value_error_exception(self):
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# Full Queue.
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queue = asyncio.Queue(1)
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queue.put_nowait(1)
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# Task waiting for space to put a item in the queue.
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put_task = asyncio.create_task(queue.put(1))
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await asyncio.sleep(0)
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# get_nowait() remove the future of put_task from queue._putters.
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queue.get_nowait()
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# When canceled, queue.put is going to remove its future from
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# self._putters but it was removed previously by queue.get_nowait().
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put_task.cancel()
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# The ValueError exception triggered by queue._putters.remove(putter)
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# inside queue.put should be silenced.
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# If the ValueError is silenced we should catch a CancelledError.
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with self.assertRaises(asyncio.CancelledError):
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await put_task
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class LifoQueueTests(unittest.IsolatedAsyncioTestCase):
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async def test_order(self):
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q = asyncio.LifoQueue()
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for i in [1, 3, 2]:
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await q.put(i)
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items = [await q.get() for _ in range(3)]
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self.assertEqual([2, 3, 1], items)
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class PriorityQueueTests(unittest.IsolatedAsyncioTestCase):
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async def test_order(self):
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q = asyncio.PriorityQueue()
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for i in [1, 3, 2]:
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await q.put(i)
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items = [await q.get() for _ in range(3)]
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self.assertEqual([1, 2, 3], items)
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class _QueueJoinTestMixin:
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q_class = None
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def test_task_done_underflow(self):
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q = self.q_class()
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self.assertRaises(ValueError, q.task_done)
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async def test_task_done(self):
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q = self.q_class()
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for i in range(100):
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q.put_nowait(i)
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accumulator = 0
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# Two workers get items from the queue and call task_done after each.
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# Join the queue and assert all items have been processed.
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running = True
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async def worker():
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nonlocal accumulator
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while running:
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item = await q.get()
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accumulator += item
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q.task_done()
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async with asyncio.TaskGroup() as tg:
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tasks = [tg.create_task(worker())
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for index in range(2)]
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await q.join()
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self.assertEqual(sum(range(100)), accumulator)
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# close running generators
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running = False
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for i in range(len(tasks)):
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q.put_nowait(0)
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async def test_join_empty_queue(self):
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q = self.q_class()
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# Test that a queue join()s successfully, and before anything else
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# (done twice for insurance).
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await q.join()
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await q.join()
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async def test_format(self):
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q = self.q_class()
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self.assertEqual(q._format(), 'maxsize=0')
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q._unfinished_tasks = 2
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self.assertEqual(q._format(), 'maxsize=0 tasks=2')
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class QueueJoinTests(_QueueJoinTestMixin, unittest.IsolatedAsyncioTestCase):
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q_class = asyncio.Queue
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class LifoQueueJoinTests(_QueueJoinTestMixin, unittest.IsolatedAsyncioTestCase):
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q_class = asyncio.LifoQueue
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class PriorityQueueJoinTests(_QueueJoinTestMixin, unittest.IsolatedAsyncioTestCase):
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q_class = asyncio.PriorityQueue
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class _QueueShutdownTestMixin:
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q_class = None
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def assertRaisesShutdown(self, msg="Didn't appear to shut-down queue"):
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return self.assertRaises(asyncio.QueueShutDown, msg=msg)
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async def test_format(self):
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q = self.q_class()
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q.shutdown()
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self.assertEqual(q._format(), 'maxsize=0 shutdown')
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async def test_shutdown_empty(self):
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# Test shutting down an empty queue
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# Setup empty queue, and join() and get() tasks
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q = self.q_class()
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loop = asyncio.get_running_loop()
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get_task = loop.create_task(q.get())
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await asyncio.sleep(0) # want get task pending before shutdown
|
|
|
|
# Perform shut-down
|
|
q.shutdown(immediate=False) # unfinished tasks: 0 -> 0
|
|
|
|
self.assertEqual(q.qsize(), 0)
|
|
|
|
# Ensure join() task successfully finishes
|
|
await q.join()
|
|
|
|
# Ensure get() task is finished, and raised ShutDown
|
|
await asyncio.sleep(0)
|
|
self.assertTrue(get_task.done())
|
|
with self.assertRaisesShutdown():
|
|
await get_task
|
|
|
|
# Ensure put() and get() raise ShutDown
|
|
with self.assertRaisesShutdown():
|
|
await q.put("data")
|
|
with self.assertRaisesShutdown():
|
|
q.put_nowait("data")
|
|
|
|
with self.assertRaisesShutdown():
|
|
await q.get()
|
|
with self.assertRaisesShutdown():
|
|
q.get_nowait()
|
|
|
|
async def test_shutdown_nonempty(self):
|
|
# Test shutting down a non-empty queue
|
|
|
|
# Setup full queue with 1 item, and join() and put() tasks
|
|
q = self.q_class(maxsize=1)
|
|
loop = asyncio.get_running_loop()
|
|
|
|
q.put_nowait("data")
|
|
join_task = loop.create_task(q.join())
|
|
put_task = loop.create_task(q.put("data2"))
|
|
|
|
# Ensure put() task is not finished
|
|
await asyncio.sleep(0)
|
|
self.assertFalse(put_task.done())
|
|
|
|
# Perform shut-down
|
|
q.shutdown(immediate=False) # unfinished tasks: 1 -> 1
|
|
|
|
self.assertEqual(q.qsize(), 1)
|
|
|
|
# Ensure put() task is finished, and raised ShutDown
|
|
await asyncio.sleep(0)
|
|
self.assertTrue(put_task.done())
|
|
with self.assertRaisesShutdown():
|
|
await put_task
|
|
|
|
# Ensure get() succeeds on enqueued item
|
|
self.assertEqual(await q.get(), "data")
|
|
|
|
# Ensure join() task is not finished
|
|
await asyncio.sleep(0)
|
|
self.assertFalse(join_task.done())
|
|
|
|
# Ensure put() and get() raise ShutDown
|
|
with self.assertRaisesShutdown():
|
|
await q.put("data")
|
|
with self.assertRaisesShutdown():
|
|
q.put_nowait("data")
|
|
|
|
with self.assertRaisesShutdown():
|
|
await q.get()
|
|
with self.assertRaisesShutdown():
|
|
q.get_nowait()
|
|
|
|
# Ensure there is 1 unfinished task, and join() task succeeds
|
|
q.task_done()
|
|
|
|
await asyncio.sleep(0)
|
|
self.assertTrue(join_task.done())
|
|
await join_task
|
|
|
|
with self.assertRaises(
|
|
ValueError, msg="Didn't appear to mark all tasks done"
|
|
):
|
|
q.task_done()
|
|
|
|
async def test_shutdown_immediate(self):
|
|
# Test immediately shutting down a queue
|
|
|
|
# Setup queue with 1 item, and a join() task
|
|
q = self.q_class()
|
|
loop = asyncio.get_running_loop()
|
|
q.put_nowait("data")
|
|
join_task = loop.create_task(q.join())
|
|
|
|
# Perform shut-down
|
|
q.shutdown(immediate=True) # unfinished tasks: 1 -> 0
|
|
|
|
self.assertEqual(q.qsize(), 0)
|
|
|
|
# Ensure join() task has successfully finished
|
|
await asyncio.sleep(0)
|
|
self.assertTrue(join_task.done())
|
|
await join_task
|
|
|
|
# Ensure put() and get() raise ShutDown
|
|
with self.assertRaisesShutdown():
|
|
await q.put("data")
|
|
with self.assertRaisesShutdown():
|
|
q.put_nowait("data")
|
|
|
|
with self.assertRaisesShutdown():
|
|
await q.get()
|
|
with self.assertRaisesShutdown():
|
|
q.get_nowait()
|
|
|
|
# Ensure there are no unfinished tasks
|
|
with self.assertRaises(
|
|
ValueError, msg="Didn't appear to mark all tasks done"
|
|
):
|
|
q.task_done()
|
|
|
|
async def test_shutdown_immediate_with_unfinished(self):
|
|
# Test immediately shutting down a queue with unfinished tasks
|
|
|
|
# Setup queue with 2 items (1 retrieved), and a join() task
|
|
q = self.q_class()
|
|
loop = asyncio.get_running_loop()
|
|
q.put_nowait("data")
|
|
q.put_nowait("data")
|
|
join_task = loop.create_task(q.join())
|
|
self.assertEqual(await q.get(), "data")
|
|
|
|
# Perform shut-down
|
|
q.shutdown(immediate=True) # unfinished tasks: 2 -> 1
|
|
|
|
self.assertEqual(q.qsize(), 0)
|
|
|
|
# Ensure join() task is not finished
|
|
await asyncio.sleep(0)
|
|
self.assertFalse(join_task.done())
|
|
|
|
# Ensure put() and get() raise ShutDown
|
|
with self.assertRaisesShutdown():
|
|
await q.put("data")
|
|
with self.assertRaisesShutdown():
|
|
q.put_nowait("data")
|
|
|
|
with self.assertRaisesShutdown():
|
|
await q.get()
|
|
with self.assertRaisesShutdown():
|
|
q.get_nowait()
|
|
|
|
# Ensure there is 1 unfinished task
|
|
q.task_done()
|
|
with self.assertRaises(
|
|
ValueError, msg="Didn't appear to mark all tasks done"
|
|
):
|
|
q.task_done()
|
|
|
|
# Ensure join() task has successfully finished
|
|
await asyncio.sleep(0)
|
|
self.assertTrue(join_task.done())
|
|
await join_task
|
|
|
|
|
|
class QueueShutdownTests(
|
|
_QueueShutdownTestMixin, unittest.IsolatedAsyncioTestCase
|
|
):
|
|
q_class = asyncio.Queue
|
|
|
|
|
|
class LifoQueueShutdownTests(
|
|
_QueueShutdownTestMixin, unittest.IsolatedAsyncioTestCase
|
|
):
|
|
q_class = asyncio.LifoQueue
|
|
|
|
|
|
class PriorityQueueShutdownTests(
|
|
_QueueShutdownTestMixin, unittest.IsolatedAsyncioTestCase
|
|
):
|
|
q_class = asyncio.PriorityQueue
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|