471 lines
13 KiB
Python
471 lines
13 KiB
Python
"""Tests for queues.py"""
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import unittest
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import unittest.mock
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from asyncio import events
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from asyncio import futures
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from asyncio import locks
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from asyncio import queues
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from asyncio import tasks
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from asyncio import test_utils
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class _QueueTestBase(unittest.TestCase):
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def setUp(self):
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self.loop = test_utils.TestLoop()
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events.set_event_loop(None)
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def tearDown(self):
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self.loop.close()
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class QueueBasicTests(_QueueTestBase):
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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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def gen():
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when = yield
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self.assertAlmostEqual(0.1, when)
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when = yield 0.1
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self.assertAlmostEqual(0.2, when)
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yield 0.1
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loop = test_utils.TestLoop(gen)
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self.addCleanup(loop.close)
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q = queues.Queue(loop=loop)
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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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@tasks.coroutine
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def add_getter():
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q = queues.Queue(loop=loop)
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# Start a task that waits to get.
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tasks.Task(q.get(), loop=loop)
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# Let it start waiting.
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yield from tasks.sleep(0.1, loop=loop)
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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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loop.run_until_complete(add_getter())
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@tasks.coroutine
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def add_putter():
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q = queues.Queue(maxsize=1, loop=loop)
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q.put_nowait(1)
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# Start a task that waits to put.
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tasks.Task(q.put(2), loop=loop)
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# Let it start waiting.
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yield from tasks.sleep(0.1, loop=loop)
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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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loop.run_until_complete(add_putter())
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q = queues.Queue(loop=loop)
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q.put_nowait(1)
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self.assertTrue('_queue=[1]' in fn(q))
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def test_ctor_loop(self):
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loop = unittest.mock.Mock()
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q = queues.Queue(loop=loop)
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self.assertIs(q._loop, loop)
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q = queues.Queue(loop=self.loop)
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self.assertIs(q._loop, self.loop)
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def test_ctor_noloop(self):
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try:
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events.set_event_loop(self.loop)
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q = queues.Queue()
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self.assertIs(q._loop, self.loop)
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finally:
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events.set_event_loop(None)
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def test_repr(self):
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self._test_repr_or_str(repr, True)
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def test_str(self):
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self._test_repr_or_str(str, False)
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def test_empty(self):
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q = queues.Queue(loop=self.loop)
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self.assertTrue(q.empty())
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q.put_nowait(1)
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self.assertFalse(q.empty())
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self.assertEqual(1, q.get_nowait())
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self.assertTrue(q.empty())
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def test_full(self):
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q = queues.Queue(loop=self.loop)
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self.assertFalse(q.full())
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q = queues.Queue(maxsize=1, loop=self.loop)
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q.put_nowait(1)
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self.assertTrue(q.full())
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def test_order(self):
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q = queues.Queue(loop=self.loop)
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for i in [1, 3, 2]:
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q.put_nowait(i)
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items = [q.get_nowait() for _ in range(3)]
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self.assertEqual([1, 3, 2], items)
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def test_maxsize(self):
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def gen():
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when = yield
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self.assertAlmostEqual(0.01, when)
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when = yield 0.01
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self.assertAlmostEqual(0.02, when)
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yield 0.01
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loop = test_utils.TestLoop(gen)
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self.addCleanup(loop.close)
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q = queues.Queue(maxsize=2, loop=loop)
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self.assertEqual(2, q.maxsize)
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have_been_put = []
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@tasks.coroutine
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def putter():
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for i in range(3):
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yield from q.put(i)
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have_been_put.append(i)
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return True
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@tasks.coroutine
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def test():
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t = tasks.Task(putter(), loop=loop)
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yield from tasks.sleep(0.01, loop=loop)
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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, q.get_nowait())
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# Let the putter resume and put last item.
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yield from tasks.sleep(0.01, loop=loop)
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self.assertEqual([0, 1, 2], have_been_put)
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self.assertEqual(1, q.get_nowait())
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self.assertEqual(2, q.get_nowait())
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self.assertTrue(t.done())
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self.assertTrue(t.result())
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loop.run_until_complete(test())
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self.assertAlmostEqual(0.02, loop.time())
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class QueueGetTests(_QueueTestBase):
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def test_blocking_get(self):
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q = queues.Queue(loop=self.loop)
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q.put_nowait(1)
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@tasks.coroutine
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def queue_get():
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return (yield from q.get())
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res = self.loop.run_until_complete(queue_get())
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self.assertEqual(1, res)
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def test_get_with_putters(self):
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q = queues.Queue(1, loop=self.loop)
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q.put_nowait(1)
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waiter = futures.Future(loop=self.loop)
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q._putters.append((2, waiter))
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res = self.loop.run_until_complete(q.get())
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self.assertEqual(1, res)
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self.assertTrue(waiter.done())
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self.assertIsNone(waiter.result())
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def test_blocking_get_wait(self):
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def gen():
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when = yield
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self.assertAlmostEqual(0.01, when)
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yield 0.01
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loop = test_utils.TestLoop(gen)
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self.addCleanup(loop.close)
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q = queues.Queue(loop=loop)
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started = locks.Event(loop=loop)
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finished = False
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@tasks.coroutine
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def queue_get():
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nonlocal finished
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started.set()
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res = yield from q.get()
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finished = True
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return res
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@tasks.coroutine
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def queue_put():
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loop.call_later(0.01, q.put_nowait, 1)
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queue_get_task = tasks.Task(queue_get(), loop=loop)
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yield from started.wait()
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self.assertFalse(finished)
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res = yield from queue_get_task
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self.assertTrue(finished)
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return res
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res = loop.run_until_complete(queue_put())
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self.assertEqual(1, res)
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self.assertAlmostEqual(0.01, loop.time())
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def test_nonblocking_get(self):
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q = queues.Queue(loop=self.loop)
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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 = queues.Queue(loop=self.loop)
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self.assertRaises(queues.Empty, q.get_nowait)
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def test_get_cancelled(self):
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def gen():
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when = yield
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self.assertAlmostEqual(0.01, when)
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when = yield 0.01
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self.assertAlmostEqual(0.061, when)
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yield 0.05
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loop = test_utils.TestLoop(gen)
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self.addCleanup(loop.close)
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q = queues.Queue(loop=loop)
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@tasks.coroutine
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def queue_get():
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return (yield from tasks.wait_for(q.get(), 0.051, loop=loop))
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@tasks.coroutine
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def test():
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get_task = tasks.Task(queue_get(), loop=loop)
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yield from tasks.sleep(0.01, loop=loop) # let the task start
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q.put_nowait(1)
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return (yield from get_task)
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self.assertEqual(1, loop.run_until_complete(test()))
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self.assertAlmostEqual(0.06, loop.time())
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def test_get_cancelled_race(self):
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q = queues.Queue(loop=self.loop)
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t1 = tasks.Task(q.get(), loop=self.loop)
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t2 = tasks.Task(q.get(), loop=self.loop)
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test_utils.run_briefly(self.loop)
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t1.cancel()
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test_utils.run_briefly(self.loop)
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self.assertTrue(t1.done())
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q.put_nowait('a')
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test_utils.run_briefly(self.loop)
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self.assertEqual(t2.result(), 'a')
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def test_get_with_waiting_putters(self):
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q = queues.Queue(loop=self.loop, maxsize=1)
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tasks.Task(q.put('a'), loop=self.loop)
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tasks.Task(q.put('b'), loop=self.loop)
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test_utils.run_briefly(self.loop)
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self.assertEqual(self.loop.run_until_complete(q.get()), 'a')
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self.assertEqual(self.loop.run_until_complete(q.get()), 'b')
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class QueuePutTests(_QueueTestBase):
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def test_blocking_put(self):
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q = queues.Queue(loop=self.loop)
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@tasks.coroutine
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def queue_put():
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# No maxsize, won't block.
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yield from q.put(1)
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self.loop.run_until_complete(queue_put())
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def test_blocking_put_wait(self):
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def gen():
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when = yield
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self.assertAlmostEqual(0.01, when)
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yield 0.01
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loop = test_utils.TestLoop(gen)
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self.addCleanup(loop.close)
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q = queues.Queue(maxsize=1, loop=loop)
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started = locks.Event(loop=loop)
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finished = False
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@tasks.coroutine
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def queue_put():
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nonlocal finished
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started.set()
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yield from q.put(1)
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yield from q.put(2)
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finished = True
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@tasks.coroutine
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def queue_get():
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loop.call_later(0.01, q.get_nowait)
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queue_put_task = tasks.Task(queue_put(), loop=loop)
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yield from started.wait()
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self.assertFalse(finished)
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yield from queue_put_task
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self.assertTrue(finished)
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loop.run_until_complete(queue_get())
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self.assertAlmostEqual(0.01, loop.time())
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def test_nonblocking_put(self):
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q = queues.Queue(loop=self.loop)
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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_put_exception(self):
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q = queues.Queue(maxsize=1, loop=self.loop)
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q.put_nowait(1)
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self.assertRaises(queues.Full, q.put_nowait, 2)
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def test_put_cancelled(self):
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q = queues.Queue(loop=self.loop)
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@tasks.coroutine
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def queue_put():
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yield from q.put(1)
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return True
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@tasks.coroutine
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def test():
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return (yield from q.get())
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t = tasks.Task(queue_put(), loop=self.loop)
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self.assertEqual(1, self.loop.run_until_complete(test()))
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self.assertTrue(t.done())
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self.assertTrue(t.result())
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def test_put_cancelled_race(self):
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q = queues.Queue(loop=self.loop, maxsize=1)
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tasks.Task(q.put('a'), loop=self.loop)
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tasks.Task(q.put('c'), loop=self.loop)
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t = tasks.Task(q.put('b'), loop=self.loop)
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test_utils.run_briefly(self.loop)
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t.cancel()
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test_utils.run_briefly(self.loop)
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self.assertTrue(t.done())
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self.assertEqual(q.get_nowait(), 'a')
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self.assertEqual(q.get_nowait(), 'c')
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def test_put_with_waiting_getters(self):
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q = queues.Queue(loop=self.loop)
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t = tasks.Task(q.get(), loop=self.loop)
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test_utils.run_briefly(self.loop)
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self.loop.run_until_complete(q.put('a'))
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self.assertEqual(self.loop.run_until_complete(t), 'a')
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class LifoQueueTests(_QueueTestBase):
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def test_order(self):
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q = queues.LifoQueue(loop=self.loop)
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for i in [1, 3, 2]:
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q.put_nowait(i)
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items = [q.get_nowait() for _ in range(3)]
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self.assertEqual([2, 3, 1], items)
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class PriorityQueueTests(_QueueTestBase):
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def test_order(self):
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q = queues.PriorityQueue(loop=self.loop)
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for i in [1, 3, 2]:
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q.put_nowait(i)
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items = [q.get_nowait() for _ in range(3)]
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self.assertEqual([1, 2, 3], items)
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class JoinableQueueTests(_QueueTestBase):
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def test_task_done_underflow(self):
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q = queues.JoinableQueue(loop=self.loop)
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self.assertRaises(ValueError, q.task_done)
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def test_task_done(self):
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q = queues.JoinableQueue(loop=self.loop)
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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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@tasks.coroutine
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def worker():
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nonlocal accumulator
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while running:
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item = yield from q.get()
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accumulator += item
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q.task_done()
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@tasks.coroutine
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def test():
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for _ in range(2):
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tasks.Task(worker(), loop=self.loop)
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yield from q.join()
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self.loop.run_until_complete(test())
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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(2):
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q.put_nowait(0)
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def test_join_empty_queue(self):
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q = queues.JoinableQueue(loop=self.loop)
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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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@tasks.coroutine
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def join():
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yield from q.join()
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yield from q.join()
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self.loop.run_until_complete(join())
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def test_format(self):
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q = queues.JoinableQueue(loop=self.loop)
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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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if __name__ == '__main__':
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unittest.main()
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