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from __future__ import annotations
from typing import TYPE_CHECKING, Any, Callable
import pytest
from pykka import Actor, ActorDeadError, Timeout
if TYPE_CHECKING:
from collections.abc import Iterator
from pykka import ActorRef, Future
from tests.types import Runtime
class ReferencableActor(Actor):
received_messages = None
def __init__(
self,
sleep_func: Callable[[float], None],
received_message: Future[str],
) -> None:
super().__init__()
self.sleep_func = sleep_func
self.received_message = received_message
def on_receive(self, message: str) -> Any:
if message == "ping":
self.sleep_func(0.01)
return "pong"
self.received_message.set(message)
return None
@pytest.fixture(scope="module")
def actor_class(runtime: Runtime) -> type[ReferencableActor]:
class ReferencableActorImpl(ReferencableActor, runtime.actor_class): # type: ignore[name-defined]
pass
return ReferencableActorImpl
@pytest.fixture
def received_message(runtime: Runtime) -> Future[str]:
return runtime.future_class()
@pytest.fixture
def actor_ref(
runtime: Runtime,
actor_class: type[ReferencableActor],
received_message: Future[str],
) -> Iterator[ActorRef[ReferencableActor]]:
ref = actor_class.start(
runtime.sleep_func,
received_message,
)
yield ref
ref.stop()
def test_repr_is_wrapped_in_lt_and_gt(
actor_ref: ActorRef[ReferencableActor],
) -> None:
result = repr(actor_ref)
assert result.startswith("<")
assert result.endswith(">")
def test_repr_reveals_that_this_is_a_ref(
actor_ref: ActorRef[ReferencableActor],
) -> None:
assert "ActorRef" in repr(actor_ref)
def test_repr_contains_actor_class_name(
actor_ref: ActorRef[ReferencableActor],
) -> None:
assert "ReferencableActor" in repr(actor_ref)
def test_repr_contains_actor_urn(
actor_ref: ActorRef[ReferencableActor],
) -> None:
assert actor_ref.actor_urn in repr(actor_ref)
def test_str_contains_actor_class_name(
actor_ref: ActorRef[ReferencableActor],
) -> None:
assert "ReferencableActor" in str(actor_ref)
def test_str_contains_actor_urn(
actor_ref: ActorRef[ReferencableActor],
) -> None:
assert actor_ref.actor_urn in str(actor_ref)
def test_is_alive_returns_true_for_running_actor(
actor_ref: ActorRef[ReferencableActor],
) -> None:
assert actor_ref.is_alive()
def test_is_alive_returns_false_for_dead_actor(
actor_ref: ActorRef[ReferencableActor],
) -> None:
actor_ref.stop()
assert not actor_ref.is_alive()
def test_stop_returns_true_if_actor_is_stopped(
actor_ref: ActorRef[ReferencableActor],
) -> None:
assert actor_ref.stop()
def test_stop_does_not_stop_already_dead_actor(
actor_ref: ActorRef[ReferencableActor],
) -> None:
assert actor_ref.stop()
assert not actor_ref.stop()
def test_tell_delivers_message_to_actors_custom_on_receive(
actor_ref: ActorRef[ReferencableActor],
received_message: Future[str],
) -> None:
actor_ref.tell("a custom message")
assert received_message.get(timeout=1) == "a custom message"
@pytest.mark.parametrize(
"message",
[
123,
123.456,
{"a": "dict"},
("a", "tuple"),
["a", "list"],
Exception("an exception"),
],
)
def test_tell_accepts_any_object_as_the_message(
actor_ref: ActorRef[ReferencableActor],
message: Any,
received_message: Future[Any],
) -> None:
actor_ref.tell(message)
assert received_message.get(timeout=1) == message
def test_tell_fails_if_actor_is_stopped(
actor_ref: ActorRef[ReferencableActor],
) -> None:
actor_ref.stop()
with pytest.raises(ActorDeadError) as exc_info:
actor_ref.tell("a custom message")
assert str(exc_info.value) == f"{actor_ref} not found"
def test_ask_blocks_until_response_arrives(
actor_ref: ActorRef[ReferencableActor],
) -> None:
result = actor_ref.ask("ping")
assert result == "pong"
def test_ask_can_timeout_if_blocked_too_long(
actor_ref: ActorRef[ReferencableActor],
) -> None:
with pytest.raises(Timeout):
actor_ref.ask("ping", timeout=0)
def test_ask_can_return_future_instead_of_blocking(
actor_ref: ActorRef[ReferencableActor],
) -> None:
future = actor_ref.ask("ping", block=False)
assert future.get() == "pong"
def test_ask_fails_if_actor_is_stopped(
actor_ref: ActorRef[ReferencableActor],
) -> None:
actor_ref.stop()
with pytest.raises(ActorDeadError) as exc_info:
actor_ref.ask("ping")
assert str(exc_info.value) == f"{actor_ref} not found"
def test_ask_nonblocking_fails_future_if_actor_is_stopped(
actor_ref: ActorRef[ReferencableActor],
) -> None:
actor_ref.stop()
future = actor_ref.ask("ping", block=False)
with pytest.raises(ActorDeadError) as exc_info:
future.get()
assert str(exc_info.value) == f"{actor_ref} not found"
|
