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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ# Some simple queue module tests, plus some failure conditions # to ensure the Queue locks remain stable. import itertools import random import threading import time import unittest import weakref from test import support from test.support import gc_collect py_queue = support.import_fresh_module('queue', blocked=['_queue']) c_queue = support.import_fresh_module('queue', fresh=['_queue']) need_c_queue = unittest.skipUnless(c_queue, "No _queue module found") QUEUE_SIZE = 5 def qfull(q): return q.maxsize > 0 and q.qsize() == q.maxsize # A thread to run a function that unclogs a blocked Queue. class _TriggerThread(threading.Thread): def __init__(self, fn, args): self.fn = fn self.args = args self.startedEvent = threading.Event() threading.Thread.__init__(self) def run(self): # The sleep isn't necessary, but is intended to give the blocking # function in the main thread a chance at actually blocking before # we unclog it. But if the sleep is longer than the timeout-based # tests wait in their blocking functions, those tests will fail. # So we give them much longer timeout values compared to the # sleep here (I aimed at 10 seconds for blocking functions -- # they should never actually wait that long - they should make # progress as soon as we call self.fn()). time.sleep(0.1) self.startedEvent.set() self.fn(*self.args) # Execute a function that blocks, and in a separate thread, a function that # triggers the release. Returns the result of the blocking function. Caution: # block_func must guarantee to block until trigger_func is called, and # trigger_func must guarantee to change queue state so that block_func can make # enough progress to return. In particular, a block_func that just raises an # exception regardless of whether trigger_func is called will lead to # timing-dependent sporadic failures, and one of those went rarely seen but # undiagnosed for years. Now block_func must be unexceptional. If block_func # is supposed to raise an exception, call do_exceptional_blocking_test() # instead. class BlockingTestMixin: def do_blocking_test(self, block_func, block_args, trigger_func, trigger_args): thread = _TriggerThread(trigger_func, trigger_args) thread.start() try: self.result = block_func(*block_args) # If block_func returned before our thread made the call, we failed! if not thread.startedEvent.is_set(): self.fail("blocking function %r appeared not to block" % block_func) return self.result finally: support.join_thread(thread) # make sure the thread terminates # Call this instead if block_func is supposed to raise an exception. def do_exceptional_blocking_test(self,block_func, block_args, trigger_func, trigger_args, expected_exception_class): thread = _TriggerThread(trigger_func, trigger_args) thread.start() try: try: block_func(*block_args) except expected_exception_class: raise else: self.fail("expected exception of kind %r" % expected_exception_class) finally: support.join_thread(thread) # make sure the thread terminates if not thread.startedEvent.is_set(): self.fail("trigger thread ended but event never set") class BaseQueueTestMixin(BlockingTestMixin): def setUp(self): self.cum = 0 self.cumlock = threading.Lock() def basic_queue_test(self, q): if q.qsize(): raise RuntimeError("Call this function with an empty queue") self.assertTrue(q.empty()) self.assertFalse(q.full()) # I guess we better check things actually queue correctly a little :) q.put(111) q.put(333) q.put(222) target_order = dict(Queue = [111, 333, 222], LifoQueue = [222, 333, 111], PriorityQueue = [111, 222, 333]) actual_order = [q.get(), q.get(), q.get()] self.assertEqual(actual_order, target_order[q.__class__.__name__], "Didn't seem to queue the correct data!") for i in range(QUEUE_SIZE-1): q.put(i) self.assertTrue(q.qsize(), "Queue should not be empty") self.assertTrue(not qfull(q), "Queue should not be full") last = 2 * QUEUE_SIZE full = 3 * 2 * QUEUE_SIZE q.put(last) self.assertTrue(qfull(q), "Queue should be full") self.assertFalse(q.empty()) self.assertTrue(q.full()) try: q.put(full, block=0) self.fail("Didn't appear to block with a full queue") except self.queue.Full: pass try: q.put(full, timeout=0.01) self.fail("Didn't appear to time-out with a full queue") except self.queue.Full: pass # Test a blocking put self.do_blocking_test(q.put, (full,), q.get, ()) self.do_blocking_test(q.put, (full, True, 10), q.get, ()) # Empty it for i in range(QUEUE_SIZE): q.get() self.assertTrue(not q.qsize(), "Queue should be empty") try: q.get(block=0) self.fail("Didn't appear to block with an empty queue") except self.queue.Empty: pass try: q.get(timeout=0.01) self.fail("Didn't appear to time-out with an empty queue") except self.queue.Empty: pass # Test a blocking get self.do_blocking_test(q.get, (), q.put, ('empty',)) self.do_blocking_test(q.get, (True, 10), q.put, ('empty',)) def worker(self, q): while True: x = q.get() if x < 0: q.task_done() return with self.cumlock: self.cum += x q.task_done() def queue_join_test(self, q): self.cum = 0 threads = [] for i in (0,1): thread = threading.Thread(target=self.worker, args=(q,)) thread.start() threads.append(thread) for i in range(100): q.put(i) q.join() self.assertEqual(self.cum, sum(range(100)), "q.join() did not block until all tasks were done") for i in (0,1): q.put(-1) # instruct the threads to close q.join() # verify that you can join twice for thread in threads: thread.join() def test_queue_task_done(self): # Test to make sure a queue task completed successfully. q = self.type2test() try: q.task_done() except ValueError: pass else: self.fail("Did not detect task count going negative") def test_queue_join(self): # Test that a queue join()s successfully, and before anything else # (done twice for insurance). q = self.type2test() self.queue_join_test(q) self.queue_join_test(q) try: q.task_done() except ValueError: pass else: self.fail("Did not detect task count going negative") def test_basic(self): # Do it a couple of times on the same queue. # Done twice to make sure works with same instance reused. q = self.type2test(QUEUE_SIZE) self.basic_queue_test(q) self.basic_queue_test(q) def test_negative_timeout_raises_exception(self): q = self.type2test(QUEUE_SIZE) with self.assertRaises(ValueError): q.put(1, timeout=-1) with self.assertRaises(ValueError): q.get(1, timeout=-1) def test_nowait(self): q = self.type2test(QUEUE_SIZE) for i in range(QUEUE_SIZE): q.put_nowait(1) with self.assertRaises(self.queue.Full): q.put_nowait(1) for i in range(QUEUE_SIZE): q.get_nowait() with self.assertRaises(self.queue.Empty): q.get_nowait() def test_shrinking_queue(self): # issue 10110 q = self.type2test(3) q.put(1) q.put(2) q.put(3) with self.assertRaises(self.queue.Full): q.put_nowait(4) self.assertEqual(q.qsize(), 3) q.maxsize = 2 # shrink the queue with self.assertRaises(self.queue.Full): q.put_nowait(4) class QueueTest(BaseQueueTestMixin): def setUp(self): self.type2test = self.queue.Queue super().setUp() class PyQueueTest(QueueTest, unittest.TestCase): queue = py_queue @need_c_queue class CQueueTest(QueueTest, unittest.TestCase): queue = c_queue class LifoQueueTest(BaseQueueTestMixin): def setUp(self): self.type2test = self.queue.LifoQueue super().setUp() class PyLifoQueueTest(LifoQueueTest, unittest.TestCase): queue = py_queue @need_c_queue class CLifoQueueTest(LifoQueueTest, unittest.TestCase): queue = c_queue class PriorityQueueTest(BaseQueueTestMixin): def setUp(self): self.type2test = self.queue.PriorityQueue super().setUp() class PyPriorityQueueTest(PriorityQueueTest, unittest.TestCase): queue = py_queue @need_c_queue class CPriorityQueueTest(PriorityQueueTest, unittest.TestCase): queue = c_queue # A Queue subclass that can provoke failure at a moment's notice :) class FailingQueueException(Exception): pass class FailingQueueTest(BlockingTestMixin): def setUp(self): Queue = self.queue.Queue class FailingQueue(Queue): def __init__(self, *args): self.fail_next_put = False self.fail_next_get = False Queue.__init__(self, *args) def _put(self, item): if self.fail_next_put: self.fail_next_put = False raise FailingQueueException("You Lose") return Queue._put(self, item) def _get(self): if self.fail_next_get: self.fail_next_get = False raise FailingQueueException("You Lose") return Queue._get(self) self.FailingQueue = FailingQueue super().setUp() def failing_queue_test(self, q): if q.qsize(): raise RuntimeError("Call this function with an empty queue") for i in range(QUEUE_SIZE-1): q.put(i) # Test a failing non-blocking put. q.fail_next_put = True try: q.put("oops", block=0) self.fail("The queue didn't fail when it should have") except FailingQueueException: pass q.fail_next_put = True try: q.put("oops", timeout=0.1) self.fail("The queue didn't fail when it should have") except FailingQueueException: pass q.put("last") self.assertTrue(qfull(q), "Queue should be full") # Test a failing blocking put q.fail_next_put = True try: self.do_blocking_test(q.put, ("full",), q.get, ()) self.fail("The queue didn't fail when it should have") except FailingQueueException: pass # Check the Queue isn't damaged. # put failed, but get succeeded - re-add q.put("last") # Test a failing timeout put q.fail_next_put = True try: self.do_exceptional_blocking_test(q.put, ("full", True, 10), q.get, (), FailingQueueException) self.fail("The queue didn't fail when it should have") except FailingQueueException: pass # Check the Queue isn't damaged. # put failed, but get succeeded - re-add q.put("last") self.assertTrue(qfull(q), "Queue should be full") q.get() self.assertTrue(not qfull(q), "Queue should not be full") q.put("last") self.assertTrue(qfull(q), "Queue should be full") # Test a blocking put self.do_blocking_test(q.put, ("full",), q.get, ()) # Empty it for i in range(QUEUE_SIZE): q.get() self.assertTrue(not q.qsize(), "Queue should be empty") q.put("first") q.fail_next_get = True try: q.get() self.fail("The queue didn't fail when it should have") except FailingQueueException: pass self.assertTrue(q.qsize(), "Queue should not be empty") q.fail_next_get = True try: q.get(timeout=0.1) self.fail("The queue didn't fail when it should have") except FailingQueueException: pass self.assertTrue(q.qsize(), "Queue should not be empty") q.get() self.assertTrue(not q.qsize(), "Queue should be empty") q.fail_next_get = True try: self.do_exceptional_blocking_test(q.get, (), q.put, ('empty',), FailingQueueException) self.fail("The queue didn't fail when it should have") except FailingQueueException: pass # put succeeded, but get failed. self.assertTrue(q.qsize(), "Queue should not be empty") q.get() self.assertTrue(not q.qsize(), "Queue should be empty") def test_failing_queue(self): # Test to make sure a queue is functioning correctly. # Done twice to the same instance. q = self.FailingQueue(QUEUE_SIZE) self.failing_queue_test(q) self.failing_queue_test(q) class PyFailingQueueTest(FailingQueueTest, unittest.TestCase): queue = py_queue @need_c_queue class CFailingQueueTest(FailingQueueTest, unittest.TestCase): queue = c_queue class BaseSimpleQueueTest: def setUp(self): self.q = self.type2test() def feed(self, q, seq, rnd, sentinel): while True: try: val = seq.pop() except IndexError: q.put(sentinel) return q.put(val) if rnd.random() > 0.5: time.sleep(rnd.random() * 1e-3) def consume(self, q, results, sentinel): while True: val = q.get() if val == sentinel: return results.append(val) def consume_nonblock(self, q, results, sentinel): while True: while True: try: val = q.get(block=False) except self.queue.Empty: time.sleep(1e-5) else: break if val == sentinel: return results.append(val) def consume_timeout(self, q, results, sentinel): while True: while True: try: val = q.get(timeout=1e-5) except self.queue.Empty: pass else: break if val == sentinel: return results.append(val) def run_threads(self, n_threads, q, inputs, feed_func, consume_func): results = [] sentinel = None seq = inputs.copy() seq.reverse() rnd = random.Random(42) exceptions = [] def log_exceptions(f): def wrapper(*args, **kwargs): try: f(*args, **kwargs) except BaseException as e: exceptions.append(e) return wrapper feeders = [threading.Thread(target=log_exceptions(feed_func), args=(q, seq, rnd, sentinel)) for i in range(n_threads)] consumers = [threading.Thread(target=log_exceptions(consume_func), args=(q, results, sentinel)) for i in range(n_threads)] with support.start_threads(feeders + consumers): pass self.assertFalse(exceptions) self.assertTrue(q.empty()) self.assertEqual(q.qsize(), 0) return results def test_basic(self): # Basic tests for get(), put() etc. q = self.q self.assertTrue(q.empty()) self.assertEqual(q.qsize(), 0) q.put(1) self.assertFalse(q.empty()) self.assertEqual(q.qsize(), 1) q.put(2) q.put_nowait(3) q.put(4) self.assertFalse(q.empty()) self.assertEqual(q.qsize(), 4) self.assertEqual(q.get(), 1) self.assertEqual(q.qsize(), 3) self.assertEqual(q.get_nowait(), 2) self.assertEqual(q.qsize(), 2) self.assertEqual(q.get(block=False), 3) self.assertFalse(q.empty()) self.assertEqual(q.qsize(), 1) self.assertEqual(q.get(timeout=0.1), 4) self.assertTrue(q.empty()) self.assertEqual(q.qsize(), 0) with self.assertRaises(self.queue.Empty): q.get(block=False) with self.assertRaises(self.queue.Empty): q.get(timeout=1e-3) with self.assertRaises(self.queue.Empty): q.get_nowait() self.assertTrue(q.empty()) self.assertEqual(q.qsize(), 0) def test_negative_timeout_raises_exception(self): q = self.q q.put(1) with self.assertRaises(ValueError): q.get(timeout=-1) def test_order(self): # Test a pair of concurrent put() and get() q = self.q inputs = list(range(100)) results = self.run_threads(1, q, inputs, self.feed, self.consume) # One producer, one consumer => results appended in well-defined order self.assertEqual(results, inputs) def test_many_threads(self): # Test multiple concurrent put() and get() N = 50 q = self.q inputs = list(range(10000)) results = self.run_threads(N, q, inputs, self.feed, self.consume) # Multiple consumers without synchronization append the # results in random order self.assertEqual(sorted(results), inputs) def test_many_threads_nonblock(self): # Test multiple concurrent put() and get(block=False) N = 50 q = self.q inputs = list(range(10000)) results = self.run_threads(N, q, inputs, self.feed, self.consume_nonblock) self.assertEqual(sorted(results), inputs) def test_many_threads_timeout(self): # Test multiple concurrent put() and get(timeout=...) N = 50 q = self.q inputs = list(range(1000)) results = self.run_threads(N, q, inputs, self.feed, self.consume_timeout) self.assertEqual(sorted(results), inputs) def test_references(self): # The queue should lose references to each item as soon as # it leaves the queue. class C: pass N = 20 q = self.q for i in range(N): q.put(C()) for i in range(N): wr = weakref.ref(q.get()) gc_collect() # For PyPy or other GCs. self.assertIsNone(wr()) class PySimpleQueueTest(BaseSimpleQueueTest, unittest.TestCase): queue = py_queue def setUp(self): self.type2test = self.queue._PySimpleQueue super().setUp() @need_c_queue class CSimpleQueueTest(BaseSimpleQueueTest, unittest.TestCase): queue = c_queue def setUp(self): self.type2test = self.queue.SimpleQueue super().setUp() def test_is_default(self): self.assertIs(self.type2test, self.queue.SimpleQueue) self.assertIs(self.type2test, self.queue.SimpleQueue) def test_reentrancy(self): # bpo-14976: put() may be called reentrantly in an asynchronous # callback. q = self.q gen = itertools.count() N = 10000 results = [] # This test exploits the fact that __del__ in a reference cycle # can be called any time the GC may run. class Circular(object): def __init__(self): self.circular = self def __del__(self): q.put(next(gen)) while True: o = Circular() q.put(next(gen)) del o results.append(q.get()) if results[-1] >= N: break self.assertEqual(results, list(range(N + 1))) if __name__ == "__main__": unittest.main()