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from greentest import TestCase, main
import gevent
from gevent import util, core
from gevent import queue
from gevent.event import AsyncResult
class TestQueue(TestCase):
def test_send_first(self):
self.switch_expected = False
q = queue.Queue()
q.put('hi')
self.assertEquals(q.get(), 'hi')
def test_send_last(self):
q = queue.Queue()
def waiter(q):
timer = gevent.Timeout.start_new(0.1)
try:
self.assertEquals(q.get(), 'hi2')
finally:
timer.cancel()
return "OK"
p = gevent.spawn(waiter, q)
gevent.sleep(0.01)
q.put('hi2')
gevent.sleep(0.01)
assert p.get(timeout=0) == "OK"
def test_max_size(self):
q = queue.Queue(2)
results = []
def putter(q):
q.put('a')
results.append('a')
q.put('b')
results.append('b')
q.put('c')
results.append('c')
return "OK"
p = gevent.spawn(putter, q)
gevent.sleep(0)
self.assertEquals(results, ['a', 'b'])
self.assertEquals(q.get(), 'a')
gevent.sleep(0)
self.assertEquals(results, ['a', 'b', 'c'])
self.assertEquals(q.get(), 'b')
self.assertEquals(q.get(), 'c')
assert p.get(timeout=0) == "OK"
def test_zero_max_size(self):
q = queue.Queue(0)
def sender(evt, q):
q.put('hi')
evt.set('done')
def receiver(evt, q):
x = q.get()
evt.set(x)
e1 = AsyncResult()
e2 = AsyncResult()
p1 = gevent.spawn(sender, e1, q)
gevent.sleep(0.001)
self.assert_(not e1.ready())
p2 = gevent.spawn(receiver, e2, q)
self.assertEquals(e2.get(), 'hi')
self.assertEquals(e1.get(), 'done')
timeout = gevent.Timeout.start_new(0)
try:
gevent.joinall([p1, p2])
finally:
timeout.cancel()
def test_multiple_waiters(self):
# tests that multiple waiters get their results back
q = queue.Queue()
def waiter(q, evt):
evt.set(q.get())
sendings = ['1', '2', '3', '4']
evts = [AsyncResult() for x in sendings]
for i, x in enumerate(sendings):
gevent.spawn(waiter, q, evts[i]) # use waitall for them
gevent.sleep(0.01) # get 'em all waiting
results = set()
def collect_pending_results():
for i, e in enumerate(evts):
timer = gevent.Timeout.start_new(0.001)
try:
x = e.get()
results.add(x)
timer.cancel()
except gevent.Timeout:
pass # no pending result at that event
return len(results)
q.put(sendings[0])
self.assertEquals(collect_pending_results(), 1)
q.put(sendings[1])
self.assertEquals(collect_pending_results(), 2)
q.put(sendings[2])
q.put(sendings[3])
self.assertEquals(collect_pending_results(), 4)
def test_waiters_that_cancel(self):
q = queue.Queue()
def do_receive(q, evt):
gevent.Timeout.start_new(0, RuntimeError())
try:
result = q.get()
evt.set(result)
except RuntimeError:
evt.set('timed out')
evt = AsyncResult()
gevent.spawn(do_receive, q, evt)
self.assertEquals(evt.get(), 'timed out')
q.put('hi')
self.assertEquals(q.get(), 'hi')
def test_senders_that_die(self):
q = queue.Queue()
def do_send(q):
q.put('sent')
gevent.spawn(do_send, q)
self.assertEquals(q.get(), 'sent')
def test_two_waiters_one_dies(self):
def waiter(q, evt):
evt.set(q.get())
def do_receive(q, evt):
timeout = gevent.Timeout.start_new(0, RuntimeError())
try:
try:
result = q.get()
evt.set(result)
except RuntimeError:
evt.set('timed out')
finally:
timeout.cancel()
q = queue.Queue()
dying_evt = AsyncResult()
waiting_evt = AsyncResult()
gevent.spawn(do_receive, q, dying_evt)
gevent.spawn(waiter, q, waiting_evt)
gevent.sleep(0)
q.put('hi')
self.assertEquals(dying_evt.get(), 'timed out')
self.assertEquals(waiting_evt.get(), 'hi')
def test_two_bogus_waiters(self):
def do_receive(q, evt):
gevent.Timeout.start_new(0, RuntimeError())
try:
result = q.get()
evt.set(result)
except RuntimeError:
evt.set('timed out')
# XXX finally = timeout
q = queue.Queue()
e1 = AsyncResult()
e2 = AsyncResult()
gevent.spawn(do_receive, q, e1)
gevent.spawn(do_receive, q, e2)
gevent.sleep(0)
q.put('sent')
self.assertEquals(e1.get(), 'timed out')
self.assertEquals(e2.get(), 'timed out')
self.assertEquals(q.get(), 'sent')
class TestChannel(TestCase):
def test_send(self):
channel = queue.Queue(0)
events = []
def another_greenlet():
events.append(channel.get())
events.append(channel.get())
g = gevent.spawn(another_greenlet)
events.append('sending')
channel.put('hello')
events.append('sent hello')
channel.put('world')
events.append('sent world')
self.assertEqual(['sending', 'hello', 'sent hello', 'world', 'sent world'], events)
g.get()
def test_wait(self):
channel = queue.Queue(0)
events = []
def another_greenlet():
events.append('sending hello')
channel.put('hello')
events.append('sending world')
channel.put('world')
events.append('sent world')
g = gevent.spawn(another_greenlet)
events.append('waiting')
events.append(channel.get())
events.append(channel.get())
self.assertEqual(['waiting', 'sending hello', 'hello', 'sending world', 'world'], events)
gevent.sleep(0)
self.assertEqual(['waiting', 'sending hello', 'hello', 'sending world', 'world', 'sent world'], events)
g.get()
def test_task_done(self):
channel = queue.JoinableQueue(0)
X = object()
gevent.spawn(channel.put, X)
result = channel.get()
assert result is X, (result, X)
assert channel.unfinished_tasks == 1, channel.unfinished_tasks
channel.task_done()
assert channel.unfinished_tasks == 0, channel.unfinished_tasks
class TestNoWait(TestCase):
def test_put_nowait_simple(self):
result = []
q = queue.Queue(1)
def store_result(func, *args):
result.append(func(*args))
core.active_event(store_result, util.wrap_errors(Exception, q.put_nowait), 2)
core.active_event(store_result, util.wrap_errors(Exception, q.put_nowait), 3)
gevent.sleep(0)
assert len(result) == 2, result
assert result[0] == None, result
assert isinstance(result[1], queue.Full), result
def test_get_nowait_simple(self):
result = []
q = queue.Queue(1)
q.put(4)
def store_result(func, *args):
result.append(func(*args))
core.active_event(store_result, util.wrap_errors(Exception, q.get_nowait))
core.active_event(store_result, util.wrap_errors(Exception, q.get_nowait))
gevent.sleep(0)
assert len(result) == 2, result
assert result[0] == 4, result
assert isinstance(result[1], queue.Empty), result
# get_nowait must work from the mainloop
def test_get_nowait_unlock(self):
result = []
q = queue.Queue(0)
p = gevent.spawn(q.put, 5)
def store_result(func, *args):
result.append(func(*args))
assert q.empty(), q
assert q.full(), q
gevent.sleep(0)
assert q.empty(), q
assert q.full(), q
core.active_event(store_result, util.wrap_errors(Exception, q.get_nowait))
gevent.sleep(0)
assert q.empty(), q
assert q.full(), q
assert result == [5], result
assert p.ready(), p
assert p.dead, p
assert q.empty(), q
# put_nowait must work from the mainloop
def test_put_nowait_unlock(self):
result = []
q = queue.Queue(0)
p = gevent.spawn(q.get)
def store_result(func, *args):
result.append(func(*args))
assert q.empty(), q
assert q.full(), q
gevent.sleep(0)
assert q.empty(), q
assert q.full(), q
core.active_event(store_result, util.wrap_errors(Exception, q.put_nowait), 10)
assert not p.ready(), p
gevent.sleep(0)
assert result == [None], result
assert p.ready(), p
assert q.full(), q
assert q.empty(), q
class TestJoinEmpty(TestCase):
def test_issue_45(self):
"""Test that join() exits immediatelly if not jobs were put into the queue"""
self.switch_expected = False
q = queue.JoinableQueue()
q.join()
if __name__ == '__main__':
main()
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