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import os
from pathlib import Path
import pytest
from execnet.gateway_base import ExecModel
from execnet.gateway_base import WorkerPool
def test_execmodel(execmodel: ExecModel, tmp_path: Path) -> None:
assert execmodel.backend
p = tmp_path / "somefile"
p.write_text("content")
fd = os.open(p, os.O_RDONLY)
f = execmodel.fdopen(fd, "r")
assert f.read() == "content"
f.close()
def test_execmodel_basic_attrs(execmodel: ExecModel) -> None:
m = execmodel
assert callable(m.start)
assert m.get_ident()
def test_simple(pool: WorkerPool) -> None:
reply = pool.spawn(lambda: 42)
assert reply.get() == 42
def test_some(pool: WorkerPool, execmodel: ExecModel) -> None:
q = execmodel.queue.Queue()
num = 4
def f(i: int) -> None:
q.put(i)
while q.qsize():
execmodel.sleep(0.01)
for i in range(num):
pool.spawn(f, i)
for i in range(num):
q.get()
# assert len(pool._running) == 4
assert pool.waitall(timeout=1.0)
# execmodel.sleep(1) helps on windows?
assert len(pool._running) == 0
def test_running_semnatics(pool: WorkerPool, execmodel: ExecModel) -> None:
q = execmodel.queue.Queue()
def first() -> None:
q.get()
reply = pool.spawn(first)
assert reply.running
assert pool.active_count() == 1
q.put(1)
assert pool.waitall()
assert pool.active_count() == 0
assert not reply.running
def test_waitfinish_on_reply(pool: WorkerPool) -> None:
l = []
reply = pool.spawn(lambda: l.append(1))
reply.waitfinish()
assert l == [1]
reply = pool.spawn(lambda: 0 / 0)
reply.waitfinish() # no exception raised
pytest.raises(ZeroDivisionError, reply.get)
@pytest.mark.xfail(reason="WorkerPool does not implement limited size")
def test_limited_size(execmodel: ExecModel) -> None:
pool = WorkerPool(execmodel, size=1) # type: ignore[call-arg]
q = execmodel.queue.Queue()
q2 = execmodel.queue.Queue()
q3 = execmodel.queue.Queue()
def first() -> None:
q.put(1)
q2.get()
pool.spawn(first)
assert q.get() == 1
def second() -> None:
q3.put(3)
# we spawn a second pool to spawn the second function
# which should block
pool2 = WorkerPool(execmodel)
pool2.spawn(pool.spawn, second)
assert not pool2.waitall(1.0)
assert q3.qsize() == 0
q2.put(2)
assert pool2.waitall()
assert pool.waitall()
def test_get(pool: WorkerPool) -> None:
def f() -> int:
return 42
reply = pool.spawn(f)
result = reply.get()
assert result == 42
def test_get_timeout(execmodel: ExecModel, pool: WorkerPool) -> None:
def f() -> int:
execmodel.sleep(0.2)
return 42
reply = pool.spawn(f)
with pytest.raises(IOError):
reply.get(timeout=0.01)
def test_get_excinfo(pool: WorkerPool) -> None:
def f() -> None:
raise ValueError("42")
reply = pool.spawn(f)
with pytest.raises(ValueError):
reply.get(1.0)
with pytest.raises(ValueError):
reply.get(1.0)
def test_waitall_timeout(pool: WorkerPool, execmodel: ExecModel) -> None:
q = execmodel.queue.Queue()
def f() -> None:
q.get()
reply = pool.spawn(f)
assert not pool.waitall(0.01)
q.put(None)
reply.get(timeout=1.0)
assert pool.waitall(timeout=0.1)
@pytest.mark.skipif(not hasattr(os, "dup"), reason="no os.dup")
def test_pool_clean_shutdown(
pool: WorkerPool, capfd: pytest.CaptureFixture[str]
) -> None:
q = pool.execmodel.queue.Queue()
def f() -> None:
q.get()
pool.spawn(f)
assert not pool.waitall(timeout=1.0)
pool.trigger_shutdown()
with pytest.raises(ValueError):
pool.spawn(f)
def wait_then_put() -> None:
pool.execmodel.sleep(0.1)
q.put(1)
pool.execmodel.start(wait_then_put)
assert pool.waitall()
out, err = capfd.readouterr()
assert err == ""
def test_primary_thread_integration(execmodel: ExecModel) -> None:
if execmodel.backend not in ("thread", "main_thread_only"):
with pytest.raises(ValueError):
WorkerPool(execmodel=execmodel, hasprimary=True)
return
pool = WorkerPool(execmodel=execmodel, hasprimary=True)
queue = execmodel.queue.Queue()
def do_integrate() -> None:
queue.put(execmodel.get_ident())
pool.integrate_as_primary_thread()
execmodel.start(do_integrate)
def func() -> None:
queue.put(execmodel.get_ident())
pool.spawn(func)
ident1 = queue.get()
ident2 = queue.get()
assert ident1 == ident2
pool.terminate()
def test_primary_thread_integration_shutdown(execmodel: ExecModel) -> None:
if execmodel.backend not in ("thread", "main_thread_only"):
pytest.skip("can only run with threading")
pool = WorkerPool(execmodel=execmodel, hasprimary=True)
queue = execmodel.queue.Queue()
def do_integrate() -> None:
queue.put(execmodel.get_ident())
pool.integrate_as_primary_thread()
execmodel.start(do_integrate)
queue.get()
queue2 = execmodel.queue.Queue()
def get_two() -> None:
queue.put(execmodel.get_ident())
queue2.get()
reply = pool.spawn(get_two)
# make sure get_two is running and blocked on queue2
queue.get()
# then shut down
pool.trigger_shutdown()
# and let get_two finish
queue2.put(1)
reply.get()
assert pool.waitall(5.0)
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