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from tests import LimitedTestCase, silence_warnings
from unittest import main
import eventlet
from eventlet import coros, spawn, sleep
from eventlet.event import Event
class TestQueue(LimitedTestCase):
@silence_warnings
def test_send_first(self):
q = coros.queue()
q.send('hi')
self.assertEquals(q.wait(), 'hi')
@silence_warnings
def test_send_exception_first(self):
q = coros.queue()
q.send(exc=RuntimeError())
self.assertRaises(RuntimeError, q.wait)
@silence_warnings
def test_send_last(self):
q = coros.queue()
def waiter(q):
timer = eventlet.Timeout(0.1)
self.assertEquals(q.wait(), 'hi2')
timer.cancel()
spawn(waiter, q)
sleep(0)
sleep(0)
q.send('hi2')
@silence_warnings
def test_max_size(self):
q = coros.queue(2)
results = []
def putter(q):
q.send('a')
results.append('a')
q.send('b')
results.append('b')
q.send('c')
results.append('c')
spawn(putter, q)
sleep(0)
self.assertEquals(results, ['a', 'b'])
self.assertEquals(q.wait(), 'a')
sleep(0)
self.assertEquals(results, ['a', 'b', 'c'])
self.assertEquals(q.wait(), 'b')
self.assertEquals(q.wait(), 'c')
@silence_warnings
def test_zero_max_size(self):
q = coros.queue(0)
def sender(evt, q):
q.send('hi')
evt.send('done')
def receiver(evt, q):
x = q.wait()
evt.send(x)
e1 = Event()
e2 = Event()
spawn(sender, e1, q)
sleep(0)
self.assert_(not e1.ready())
spawn(receiver, e2, q)
self.assertEquals(e2.wait(),'hi')
self.assertEquals(e1.wait(),'done')
@silence_warnings
def test_multiple_waiters(self):
# tests that multiple waiters get their results back
q = coros.queue()
sendings = ['1', '2', '3', '4']
gts = [eventlet.spawn(q.wait)
for x in sendings]
eventlet.sleep(0.01) # get 'em all waiting
q.send(sendings[0])
q.send(sendings[1])
q.send(sendings[2])
q.send(sendings[3])
results = set()
for i, gt in enumerate(gts):
results.add(gt.wait())
self.assertEquals(results, set(sendings))
@silence_warnings
def test_waiters_that_cancel(self):
q = coros.queue()
def do_receive(q, evt):
eventlet.Timeout(0, RuntimeError())
try:
result = q.wait()
evt.send(result)
except RuntimeError:
evt.send('timed out')
evt = Event()
spawn(do_receive, q, evt)
self.assertEquals(evt.wait(), 'timed out')
q.send('hi')
self.assertEquals(q.wait(), 'hi')
@silence_warnings
def test_senders_that_die(self):
q = coros.queue()
def do_send(q):
q.send('sent')
spawn(do_send, q)
self.assertEquals(q.wait(), 'sent')
@silence_warnings
def test_two_waiters_one_dies(self):
def waiter(q, evt):
evt.send(q.wait())
def do_receive(q, evt):
eventlet.Timeout(0, RuntimeError())
try:
result = q.wait()
evt.send(result)
except RuntimeError:
evt.send('timed out')
q = coros.queue()
dying_evt = Event()
waiting_evt = Event()
spawn(do_receive, q, dying_evt)
spawn(waiter, q, waiting_evt)
sleep(0)
q.send('hi')
self.assertEquals(dying_evt.wait(), 'timed out')
self.assertEquals(waiting_evt.wait(), 'hi')
@silence_warnings
def test_two_bogus_waiters(self):
def do_receive(q, evt):
eventlet.Timeout(0, RuntimeError())
try:
result = q.wait()
evt.send(result)
except RuntimeError:
evt.send('timed out')
q = coros.queue()
e1 = Event()
e2 = Event()
spawn(do_receive, q, e1)
spawn(do_receive, q, e2)
sleep(0)
q.send('sent')
self.assertEquals(e1.wait(), 'timed out')
self.assertEquals(e2.wait(), 'timed out')
self.assertEquals(q.wait(), 'sent')
@silence_warnings
def test_waiting(self):
def do_wait(q, evt):
result = q.wait()
evt.send(result)
q = coros.queue()
e1 = Event()
spawn(do_wait, q, e1)
sleep(0)
self.assertEquals(1, q.waiting())
q.send('hi')
sleep(0)
self.assertEquals(0, q.waiting())
self.assertEquals('hi', e1.wait())
self.assertEquals(0, q.waiting())
class TestChannel(LimitedTestCase):
@silence_warnings
def test_send(self):
sleep(0.1)
channel = coros.queue(0)
events = []
def another_greenlet():
events.append(channel.wait())
events.append(channel.wait())
spawn(another_greenlet)
events.append('sending')
channel.send('hello')
events.append('sent hello')
channel.send('world')
events.append('sent world')
self.assertEqual(['sending', 'hello', 'sent hello', 'world', 'sent world'], events)
@silence_warnings
def test_wait(self):
sleep(0.1)
channel = coros.queue(0)
events = []
def another_greenlet():
events.append('sending hello')
channel.send('hello')
events.append('sending world')
channel.send('world')
events.append('sent world')
spawn(another_greenlet)
events.append('waiting')
events.append(channel.wait())
events.append(channel.wait())
self.assertEqual(['waiting', 'sending hello', 'hello', 'sending world', 'world'], events)
sleep(0)
self.assertEqual(['waiting', 'sending hello', 'hello', 'sending world', 'world', 'sent world'], events)
@silence_warnings
def test_waiters(self):
c = coros.Channel()
w1 = eventlet.spawn(c.wait)
w2 = eventlet.spawn(c.wait)
w3 = eventlet.spawn(c.wait)
sleep(0)
self.assertEquals(c.waiting(), 3)
s1 = eventlet.spawn(c.send, 1)
s2 = eventlet.spawn(c.send, 2)
s3 = eventlet.spawn(c.send, 3)
sleep(0) # this gets all the sends into a waiting state
self.assertEquals(c.waiting(), 0)
s1.wait()
s2.wait()
s3.wait()
# NOTE: we don't guarantee that waiters are served in order
results = sorted([w1.wait(), w2.wait(), w3.wait()])
self.assertEquals(results, [1,2,3])
if __name__=='__main__':
main()
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