def test_resize(self):
pool = GreenPool(2)
evt = Event()
def wait_long_time(e):
e.wait()
pool.spawn(wait_long_time, evt)
pool.spawn(wait_long_time, evt)
self.assertEquals(pool.free(), 0)
self.assert_pool_has_free(pool, 0)
# verify that the pool discards excess items put into it
pool.resize(1)
# cause the wait_long_time functions to return, which will
# trigger puts to the pool
evt.send(None)
sleep(0)
sleep(0)
self.assertEquals(pool.free(), 1)
self.assert_pool_has_free(pool, 1)
# resize larger and assert that there are more free items
pool.resize(2)
self.assertEquals(pool.free(), 2)
self.assert_pool_has_free(pool, 2)
def test_spawn_n_2(self):
p = GreenPool(2)
self.assertEqual(p.free(), 2)
r = []
def foo(a):
r.append(a)
gt = p.spawn(foo, 1)
self.assertEqual(p.free(), 1)
gt.wait()
self.assertEqual(r, [1])
sleep(0)
self.assertEqual(p.free(), 2)
#Once the pool is exhausted, spawning forces a yield.
p.spawn_n(foo, 2)
self.assertEqual(1, p.free())
self.assertEqual(r, [1])
p.spawn_n(foo, 3)
self.assertEqual(0, p.free())
self.assertEqual(r, [1])
p.spawn_n(foo, 4)
self.assertEqual(set(r), set([1, 2, 3]))
sleep(0)
self.assertEqual(set(r), set([1, 2, 3, 4]))
def test_resize(self):
pool = GreenPool(2)
evt = Event()
def wait_long_time(e):
e.wait()
pool.spawn(wait_long_time, evt)
pool.spawn(wait_long_time, evt)
self.assertEquals(pool.free(), 0)
self.assert_pool_has_free(pool, 0)
# verify that the pool discards excess items put into it
pool.resize(1)
# cause the wait_long_time functions to return, which will
# trigger puts to the pool
evt.send(None)
sleep(0)
sleep(0)
self.assertEquals(pool.free(), 1)
self.assert_pool_has_free(pool, 1)
# resize larger and assert that there are more free items
pool.resize(2)
self.assertEquals(pool.free(), 2)
self.assert_pool_has_free(pool, 2)
def test_spawn_n_2(self):
p = GreenPool(2)
self.assertEqual(p.free(), 2)
r = []
def foo(a):
r.append(a)
gt = p.spawn(foo, 1)
self.assertEqual(p.free(), 1)
gt.wait()
self.assertEqual(r, [1])
sleep(0)
self.assertEqual(p.free(), 2)
# Once the pool is exhausted, spawning forces a yield.
p.spawn_n(foo, 2)
self.assertEqual(1, p.free())
self.assertEqual(r, [1])
p.spawn_n(foo, 3)
self.assertEqual(0, p.free())
self.assertEqual(r, [1])
p.spawn_n(foo, 4)
self.assertEqual(set(r), set([1, 2, 3]))
sleep(0)
self.assertEqual(set(r), set([1, 2, 3, 4]))
def test_stderr_raising(self):
# testing that really egregious errors in the error handling code
# (that prints tracebacks to stderr) don't cause the pool to lose
# any members
import sys
pool = GreenPool(1)
def crash(*args, **kw):
raise RuntimeError("Whoa")
class FakeFile(object):
write = crash
# we're going to do this by causing the traceback.print_exc in
# safe_apply to raise an exception and thus exit _main_loop
normal_err = sys.stderr
try:
sys.stderr = FakeFile()
waiter = pool.spawn(crash)
self.assertRaises(RuntimeError, waiter.wait)
# the pool should have something free at this point since the
# waiter returned
# GreenPool change: if an exception is raised during execution of a link,
# the rest of the links are scheduled to be executed on the next hub iteration
# this introduces a delay in updating pool.sem which makes pool.free() report 0
# therefore, sleep:
sleep(0)
self.assertEqual(pool.free(), 1)
# shouldn't block when trying to get
t = Timeout(0.1)
try:
pool.spawn(sleep, 1)
finally:
t.cancel()
finally:
sys.stderr = normal_err
def test_stderr_raising(self):
# testing that really egregious errors in the error handling code
# (that prints tracebacks to stderr) don't cause the pool to lose
# any members
import sys
pool = GreenPool(1)
def crash(*args, **kw):
raise RuntimeError("Whoa")
class FakeFile(object):
write = crash
# we're going to do this by causing the traceback.print_exc in
# safe_apply to raise an exception and thus exit _main_loop
normal_err = sys.stderr
try:
sys.stderr = FakeFile()
waiter = pool.spawn(crash)
self.assertRaises(RuntimeError, waiter.wait)
# the pool should have something free at this point since the
# waiter returned
# GreenPool change: if an exception is raised during execution of a link,
# the rest of the links are scheduled to be executed on the next hub iteration
# this introduces a delay in updating pool.sem which makes pool.free() report 0
# therefore, sleep:
sleep(0)
self.assertEqual(pool.free(), 1)
# shouldn't block when trying to get
t = Timeout(0.1)
try:
pool.spawn(sleep, 1)
finally:
t.cancel()
finally:
sys.stderr = normal_err
