/usr/lib/python3/dist-packages/tornado/test/queues_test.py is in python3-tornado 4.5.3-1.
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# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from __future__ import absolute_import, division, print_function
from datetime import timedelta
from random import random
from tornado import gen, queues
from tornado.gen import TimeoutError
from tornado.testing import gen_test, AsyncTestCase
from tornado.test.util import unittest, skipBefore35, exec_test
class QueueBasicTest(AsyncTestCase):
def test_repr_and_str(self):
q = queues.Queue(maxsize=1)
self.assertIn(hex(id(q)), repr(q))
self.assertNotIn(hex(id(q)), str(q))
q.get()
for q_str in repr(q), str(q):
self.assertTrue(q_str.startswith('<Queue'))
self.assertIn('maxsize=1', q_str)
self.assertIn('getters[1]', q_str)
self.assertNotIn('putters', q_str)
self.assertNotIn('tasks', q_str)
q.put(None)
q.put(None)
# Now the queue is full, this putter blocks.
q.put(None)
for q_str in repr(q), str(q):
self.assertNotIn('getters', q_str)
self.assertIn('putters[1]', q_str)
self.assertIn('tasks=2', q_str)
def test_order(self):
q = queues.Queue()
for i in [1, 3, 2]:
q.put_nowait(i)
items = [q.get_nowait() for _ in range(3)]
self.assertEqual([1, 3, 2], items)
@gen_test
def test_maxsize(self):
self.assertRaises(TypeError, queues.Queue, maxsize=None)
self.assertRaises(ValueError, queues.Queue, maxsize=-1)
q = queues.Queue(maxsize=2)
self.assertTrue(q.empty())
self.assertFalse(q.full())
self.assertEqual(2, q.maxsize)
self.assertTrue(q.put(0).done())
self.assertTrue(q.put(1).done())
self.assertFalse(q.empty())
self.assertTrue(q.full())
put2 = q.put(2)
self.assertFalse(put2.done())
self.assertEqual(0, (yield q.get())) # Make room.
self.assertTrue(put2.done())
self.assertFalse(q.empty())
self.assertTrue(q.full())
class QueueGetTest(AsyncTestCase):
@gen_test
def test_blocking_get(self):
q = queues.Queue()
q.put_nowait(0)
self.assertEqual(0, (yield q.get()))
def test_nonblocking_get(self):
q = queues.Queue()
q.put_nowait(0)
self.assertEqual(0, q.get_nowait())
def test_nonblocking_get_exception(self):
q = queues.Queue()
self.assertRaises(queues.QueueEmpty, q.get_nowait)
@gen_test
def test_get_with_putters(self):
q = queues.Queue(1)
q.put_nowait(0)
put = q.put(1)
self.assertEqual(0, (yield q.get()))
self.assertIsNone((yield put))
@gen_test
def test_blocking_get_wait(self):
q = queues.Queue()
q.put(0)
self.io_loop.call_later(0.01, q.put, 1)
self.io_loop.call_later(0.02, q.put, 2)
self.assertEqual(0, (yield q.get(timeout=timedelta(seconds=1))))
self.assertEqual(1, (yield q.get(timeout=timedelta(seconds=1))))
@gen_test
def test_get_timeout(self):
q = queues.Queue()
get_timeout = q.get(timeout=timedelta(seconds=0.01))
get = q.get()
with self.assertRaises(TimeoutError):
yield get_timeout
q.put_nowait(0)
self.assertEqual(0, (yield get))
@gen_test
def test_get_timeout_preempted(self):
q = queues.Queue()
get = q.get(timeout=timedelta(seconds=0.01))
q.put(0)
yield gen.sleep(0.02)
self.assertEqual(0, (yield get))
@gen_test
def test_get_clears_timed_out_putters(self):
q = queues.Queue(1)
# First putter succeeds, remainder block.
putters = [q.put(i, timedelta(seconds=0.01)) for i in range(10)]
put = q.put(10)
self.assertEqual(10, len(q._putters))
yield gen.sleep(0.02)
self.assertEqual(10, len(q._putters))
self.assertFalse(put.done()) # Final waiter is still active.
q.put(11)
self.assertEqual(0, (yield q.get())) # get() clears the waiters.
self.assertEqual(1, len(q._putters))
for putter in putters[1:]:
self.assertRaises(TimeoutError, putter.result)
@gen_test
def test_get_clears_timed_out_getters(self):
q = queues.Queue()
getters = [q.get(timedelta(seconds=0.01)) for _ in range(10)]
get = q.get()
self.assertEqual(11, len(q._getters))
yield gen.sleep(0.02)
self.assertEqual(11, len(q._getters))
self.assertFalse(get.done()) # Final waiter is still active.
q.get() # get() clears the waiters.
self.assertEqual(2, len(q._getters))
for getter in getters:
self.assertRaises(TimeoutError, getter.result)
@skipBefore35
@gen_test
def test_async_for(self):
q = queues.Queue()
for i in range(5):
q.put(i)
namespace = exec_test(globals(), locals(), """
async def f():
results = []
async for i in q:
results.append(i)
if i == 4:
return results
""")
results = yield namespace['f']()
self.assertEqual(results, list(range(5)))
class QueuePutTest(AsyncTestCase):
@gen_test
def test_blocking_put(self):
q = queues.Queue()
q.put(0)
self.assertEqual(0, q.get_nowait())
def test_nonblocking_put_exception(self):
q = queues.Queue(1)
q.put(0)
self.assertRaises(queues.QueueFull, q.put_nowait, 1)
@gen_test
def test_put_with_getters(self):
q = queues.Queue()
get0 = q.get()
get1 = q.get()
yield q.put(0)
self.assertEqual(0, (yield get0))
yield q.put(1)
self.assertEqual(1, (yield get1))
@gen_test
def test_nonblocking_put_with_getters(self):
q = queues.Queue()
get0 = q.get()
get1 = q.get()
q.put_nowait(0)
# put_nowait does *not* immediately unblock getters.
yield gen.moment
self.assertEqual(0, (yield get0))
q.put_nowait(1)
yield gen.moment
self.assertEqual(1, (yield get1))
@gen_test
def test_blocking_put_wait(self):
q = queues.Queue(1)
q.put_nowait(0)
self.io_loop.call_later(0.01, q.get)
self.io_loop.call_later(0.02, q.get)
futures = [q.put(0), q.put(1)]
self.assertFalse(any(f.done() for f in futures))
yield futures
@gen_test
def test_put_timeout(self):
q = queues.Queue(1)
q.put_nowait(0) # Now it's full.
put_timeout = q.put(1, timeout=timedelta(seconds=0.01))
put = q.put(2)
with self.assertRaises(TimeoutError):
yield put_timeout
self.assertEqual(0, q.get_nowait())
# 1 was never put in the queue.
self.assertEqual(2, (yield q.get()))
# Final get() unblocked this putter.
yield put
@gen_test
def test_put_timeout_preempted(self):
q = queues.Queue(1)
q.put_nowait(0)
put = q.put(1, timeout=timedelta(seconds=0.01))
q.get()
yield gen.sleep(0.02)
yield put # No TimeoutError.
@gen_test
def test_put_clears_timed_out_putters(self):
q = queues.Queue(1)
# First putter succeeds, remainder block.
putters = [q.put(i, timedelta(seconds=0.01)) for i in range(10)]
put = q.put(10)
self.assertEqual(10, len(q._putters))
yield gen.sleep(0.02)
self.assertEqual(10, len(q._putters))
self.assertFalse(put.done()) # Final waiter is still active.
q.put(11) # put() clears the waiters.
self.assertEqual(2, len(q._putters))
for putter in putters[1:]:
self.assertRaises(TimeoutError, putter.result)
@gen_test
def test_put_clears_timed_out_getters(self):
q = queues.Queue()
getters = [q.get(timedelta(seconds=0.01)) for _ in range(10)]
get = q.get()
q.get()
self.assertEqual(12, len(q._getters))
yield gen.sleep(0.02)
self.assertEqual(12, len(q._getters))
self.assertFalse(get.done()) # Final waiters still active.
q.put(0) # put() clears the waiters.
self.assertEqual(1, len(q._getters))
self.assertEqual(0, (yield get))
for getter in getters:
self.assertRaises(TimeoutError, getter.result)
@gen_test
def test_float_maxsize(self):
# Non-int maxsize must round down: http://bugs.python.org/issue21723
q = queues.Queue(maxsize=1.3)
self.assertTrue(q.empty())
self.assertFalse(q.full())
q.put_nowait(0)
q.put_nowait(1)
self.assertFalse(q.empty())
self.assertTrue(q.full())
self.assertRaises(queues.QueueFull, q.put_nowait, 2)
self.assertEqual(0, q.get_nowait())
self.assertFalse(q.empty())
self.assertFalse(q.full())
yield q.put(2)
put = q.put(3)
self.assertFalse(put.done())
self.assertEqual(1, (yield q.get()))
yield put
self.assertTrue(q.full())
class QueueJoinTest(AsyncTestCase):
queue_class = queues.Queue
def test_task_done_underflow(self):
q = self.queue_class()
self.assertRaises(ValueError, q.task_done)
@gen_test
def test_task_done(self):
q = self.queue_class()
for i in range(100):
q.put_nowait(i)
self.accumulator = 0
@gen.coroutine
def worker():
while True:
item = yield q.get()
self.accumulator += item
q.task_done()
yield gen.sleep(random() * 0.01)
# Two coroutines share work.
worker()
worker()
yield q.join()
self.assertEqual(sum(range(100)), self.accumulator)
@gen_test
def test_task_done_delay(self):
# Verify it is task_done(), not get(), that unblocks join().
q = self.queue_class()
q.put_nowait(0)
join = q.join()
self.assertFalse(join.done())
yield q.get()
self.assertFalse(join.done())
yield gen.moment
self.assertFalse(join.done())
q.task_done()
self.assertTrue(join.done())
@gen_test
def test_join_empty_queue(self):
q = self.queue_class()
yield q.join()
yield q.join()
@gen_test
def test_join_timeout(self):
q = self.queue_class()
q.put(0)
with self.assertRaises(TimeoutError):
yield q.join(timeout=timedelta(seconds=0.01))
class PriorityQueueJoinTest(QueueJoinTest):
queue_class = queues.PriorityQueue
@gen_test
def test_order(self):
q = self.queue_class(maxsize=2)
q.put_nowait((1, 'a'))
q.put_nowait((0, 'b'))
self.assertTrue(q.full())
q.put((3, 'c'))
q.put((2, 'd'))
self.assertEqual((0, 'b'), q.get_nowait())
self.assertEqual((1, 'a'), (yield q.get()))
self.assertEqual((2, 'd'), q.get_nowait())
self.assertEqual((3, 'c'), (yield q.get()))
self.assertTrue(q.empty())
class LifoQueueJoinTest(QueueJoinTest):
queue_class = queues.LifoQueue
@gen_test
def test_order(self):
q = self.queue_class(maxsize=2)
q.put_nowait(1)
q.put_nowait(0)
self.assertTrue(q.full())
q.put(3)
q.put(2)
self.assertEqual(3, q.get_nowait())
self.assertEqual(2, (yield q.get()))
self.assertEqual(0, q.get_nowait())
self.assertEqual(1, (yield q.get()))
self.assertTrue(q.empty())
class ProducerConsumerTest(AsyncTestCase):
@gen_test
def test_producer_consumer(self):
q = queues.Queue(maxsize=3)
history = []
# We don't yield between get() and task_done(), so get() must wait for
# the next tick. Otherwise we'd immediately call task_done and unblock
# join() before q.put() resumes, and we'd only process the first four
# items.
@gen.coroutine
def consumer():
while True:
history.append((yield q.get()))
q.task_done()
@gen.coroutine
def producer():
for item in range(10):
yield q.put(item)
consumer()
yield producer()
yield q.join()
self.assertEqual(list(range(10)), history)
if __name__ == '__main__':
unittest.main()
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