341 lines
12 KiB
Python
341 lines
12 KiB
Python
import asyncio
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import io
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from typing import NamedTuple
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import pytest
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from libp2p.peer.id import ID
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from libp2p.pubsub.pb import rpc_pb2
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from tests.utils import connect
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from .utils import make_pubsub_msg
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TESTING_TOPIC = "TEST_SUBSCRIBE"
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TESTING_DATA = b"data"
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@pytest.mark.parametrize("num_hosts", (1,))
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@pytest.mark.asyncio
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async def test_subscribe_and_unsubscribe(pubsubs_fsub):
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await pubsubs_fsub[0].subscribe(TESTING_TOPIC)
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assert TESTING_TOPIC in pubsubs_fsub[0].my_topics
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await pubsubs_fsub[0].unsubscribe(TESTING_TOPIC)
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assert TESTING_TOPIC not in pubsubs_fsub[0].my_topics
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@pytest.mark.parametrize("num_hosts", (1,))
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@pytest.mark.asyncio
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async def test_re_subscribe(pubsubs_fsub):
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await pubsubs_fsub[0].subscribe(TESTING_TOPIC)
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assert TESTING_TOPIC in pubsubs_fsub[0].my_topics
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await pubsubs_fsub[0].subscribe(TESTING_TOPIC)
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assert TESTING_TOPIC in pubsubs_fsub[0].my_topics
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@pytest.mark.parametrize("num_hosts", (1,))
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@pytest.mark.asyncio
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async def test_re_unsubscribe(pubsubs_fsub):
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# Unsubscribe from topic we didn't even subscribe to
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assert "NOT_MY_TOPIC" not in pubsubs_fsub[0].my_topics
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await pubsubs_fsub[0].unsubscribe("NOT_MY_TOPIC")
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assert "NOT_MY_TOPIC" not in pubsubs_fsub[0].my_topics
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await pubsubs_fsub[0].subscribe(TESTING_TOPIC)
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assert TESTING_TOPIC in pubsubs_fsub[0].my_topics
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await pubsubs_fsub[0].unsubscribe(TESTING_TOPIC)
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assert TESTING_TOPIC not in pubsubs_fsub[0].my_topics
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await pubsubs_fsub[0].unsubscribe(TESTING_TOPIC)
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assert TESTING_TOPIC not in pubsubs_fsub[0].my_topics
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@pytest.mark.asyncio
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async def test_peers_subscribe(pubsubs_fsub):
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await connect(pubsubs_fsub[0].host, pubsubs_fsub[1].host)
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await pubsubs_fsub[0].subscribe(TESTING_TOPIC)
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# Yield to let 0 notify 1
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await asyncio.sleep(0.1)
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assert str(pubsubs_fsub[0].my_id) in pubsubs_fsub[1].peer_topics[TESTING_TOPIC]
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await pubsubs_fsub[0].unsubscribe(TESTING_TOPIC)
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# Yield to let 0 notify 1
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await asyncio.sleep(0.1)
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assert str(pubsubs_fsub[0].my_id) not in pubsubs_fsub[1].peer_topics[TESTING_TOPIC]
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@pytest.mark.parametrize("num_hosts", (1,))
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@pytest.mark.asyncio
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async def test_get_hello_packet(pubsubs_fsub):
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def _get_hello_packet_topic_ids():
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packet = rpc_pb2.RPC()
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packet.ParseFromString(pubsubs_fsub[0].get_hello_packet())
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return tuple(sub.topicid for sub in packet.subscriptions)
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# pylint: disable=len-as-condition
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# Test: No subscription, so there should not be any topic ids in the hello packet.
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assert len(_get_hello_packet_topic_ids()) == 0
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# Test: After subscriptions, topic ids should be in the hello packet.
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topic_ids = ["t", "o", "p", "i", "c"]
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await asyncio.gather(*[pubsubs_fsub[0].subscribe(topic) for topic in topic_ids])
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topic_ids_in_hello = _get_hello_packet_topic_ids()
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for topic in topic_ids:
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assert topic in topic_ids_in_hello
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class FakeNetStream:
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_queue: asyncio.Queue
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class FakeMplexConn(NamedTuple):
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peer_id: ID = ID(b"\x12\x20" + b"\x00" * 32)
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mplex_conn = FakeMplexConn()
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def __init__(self) -> None:
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self._queue = asyncio.Queue()
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async def read(self) -> bytes:
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buf = io.BytesIO()
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while not self._queue.empty():
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buf.write(await self._queue.get())
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return buf.getvalue()
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async def write(self, data: bytes) -> int:
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for i in data:
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await self._queue.put(i.to_bytes(1, "big"))
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return len(data)
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@pytest.mark.parametrize("num_hosts", (1,))
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@pytest.mark.asyncio
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async def test_continuously_read_stream(pubsubs_fsub, monkeypatch):
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stream = FakeNetStream()
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await pubsubs_fsub[0].subscribe(TESTING_TOPIC)
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event_push_msg = asyncio.Event()
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event_handle_subscription = asyncio.Event()
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event_handle_rpc = asyncio.Event()
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async def mock_push_msg(msg_forwarder, msg):
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event_push_msg.set()
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def mock_handle_subscription(origin_id, sub_message):
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event_handle_subscription.set()
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async def mock_handle_rpc(rpc, sender_peer_id):
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event_handle_rpc.set()
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monkeypatch.setattr(pubsubs_fsub[0], "push_msg", mock_push_msg)
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monkeypatch.setattr(
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pubsubs_fsub[0], "handle_subscription", mock_handle_subscription
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)
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monkeypatch.setattr(pubsubs_fsub[0].router, "handle_rpc", mock_handle_rpc)
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async def wait_for_event_occurring(event):
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try:
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await asyncio.wait_for(event.wait(), timeout=0.01)
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except asyncio.TimeoutError as error:
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event.clear()
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raise asyncio.TimeoutError(
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f"Event {event} is not set before the timeout. "
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"This indicates the mocked functions are not called properly."
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) from error
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else:
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event.clear()
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# Kick off the task `continuously_read_stream`
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task = asyncio.ensure_future(pubsubs_fsub[0].continuously_read_stream(stream))
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# Test: `push_msg` is called when publishing to a subscribed topic.
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publish_subscribed_topic = rpc_pb2.RPC(
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publish=[rpc_pb2.Message(topicIDs=[TESTING_TOPIC])]
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)
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await stream.write(publish_subscribed_topic.SerializeToString())
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await wait_for_event_occurring(event_push_msg)
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# Make sure the other events are not emitted.
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with pytest.raises(asyncio.TimeoutError):
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await wait_for_event_occurring(event_handle_subscription)
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with pytest.raises(asyncio.TimeoutError):
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await wait_for_event_occurring(event_handle_rpc)
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# Test: `push_msg` is not called when publishing to a topic-not-subscribed.
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publish_not_subscribed_topic = rpc_pb2.RPC(
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publish=[rpc_pb2.Message(topicIDs=["NOT_SUBSCRIBED"])]
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)
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await stream.write(publish_not_subscribed_topic.SerializeToString())
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with pytest.raises(asyncio.TimeoutError):
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await wait_for_event_occurring(event_push_msg)
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# Test: `handle_subscription` is called when a subscription message is received.
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subscription_msg = rpc_pb2.RPC(subscriptions=[rpc_pb2.RPC.SubOpts()])
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await stream.write(subscription_msg.SerializeToString())
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await wait_for_event_occurring(event_handle_subscription)
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# Make sure the other events are not emitted.
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with pytest.raises(asyncio.TimeoutError):
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await wait_for_event_occurring(event_push_msg)
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with pytest.raises(asyncio.TimeoutError):
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await wait_for_event_occurring(event_handle_rpc)
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# Test: `handle_rpc` is called when a control message is received.
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control_msg = rpc_pb2.RPC(control=rpc_pb2.ControlMessage())
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await stream.write(control_msg.SerializeToString())
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await wait_for_event_occurring(event_handle_rpc)
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# Make sure the other events are not emitted.
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with pytest.raises(asyncio.TimeoutError):
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await wait_for_event_occurring(event_push_msg)
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with pytest.raises(asyncio.TimeoutError):
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await wait_for_event_occurring(event_handle_subscription)
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task.cancel()
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# TODO: Add the following tests after they are aligned with Go.
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# (Issue #191: https://github.com/libp2p/py-libp2p/issues/191)
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# - `test_stream_handler`
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# - `test_handle_peer_queue`
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@pytest.mark.parametrize("num_hosts", (1,))
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def test_handle_subscription(pubsubs_fsub):
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assert len(pubsubs_fsub[0].peer_topics) == 0
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sub_msg_0 = rpc_pb2.RPC.SubOpts(subscribe=True, topicid=TESTING_TOPIC)
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peer_ids = [ID(b"\x12\x20" + i.to_bytes(32, "big")) for i in range(2)]
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# Test: One peer is subscribed
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pubsubs_fsub[0].handle_subscription(peer_ids[0], sub_msg_0)
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assert (
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len(pubsubs_fsub[0].peer_topics) == 1
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and TESTING_TOPIC in pubsubs_fsub[0].peer_topics
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)
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assert len(pubsubs_fsub[0].peer_topics[TESTING_TOPIC]) == 1
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assert str(peer_ids[0]) in pubsubs_fsub[0].peer_topics[TESTING_TOPIC]
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# Test: Another peer is subscribed
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pubsubs_fsub[0].handle_subscription(peer_ids[1], sub_msg_0)
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assert len(pubsubs_fsub[0].peer_topics) == 1
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assert len(pubsubs_fsub[0].peer_topics[TESTING_TOPIC]) == 2
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assert str(peer_ids[1]) in pubsubs_fsub[0].peer_topics[TESTING_TOPIC]
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# Test: Subscribe to another topic
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another_topic = "ANOTHER_TOPIC"
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sub_msg_1 = rpc_pb2.RPC.SubOpts(subscribe=True, topicid=another_topic)
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pubsubs_fsub[0].handle_subscription(peer_ids[0], sub_msg_1)
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assert len(pubsubs_fsub[0].peer_topics) == 2
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assert another_topic in pubsubs_fsub[0].peer_topics
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assert str(peer_ids[0]) in pubsubs_fsub[0].peer_topics[another_topic]
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# Test: unsubscribe
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unsub_msg = rpc_pb2.RPC.SubOpts(subscribe=False, topicid=TESTING_TOPIC)
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pubsubs_fsub[0].handle_subscription(peer_ids[0], unsub_msg)
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assert str(peer_ids[0]) not in pubsubs_fsub[0].peer_topics[TESTING_TOPIC]
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@pytest.mark.parametrize("num_hosts", (1,))
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@pytest.mark.asyncio
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async def test_handle_talk(pubsubs_fsub):
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sub = await pubsubs_fsub[0].subscribe(TESTING_TOPIC)
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msg_0 = make_pubsub_msg(
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origin_id=pubsubs_fsub[0].my_id,
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topic_ids=[TESTING_TOPIC],
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data=b"1234",
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seqno=b"\x00" * 8,
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)
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await pubsubs_fsub[0].handle_talk(msg_0)
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msg_1 = make_pubsub_msg(
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origin_id=pubsubs_fsub[0].my_id,
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topic_ids=["NOT_SUBSCRIBED"],
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data=b"1234",
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seqno=b"\x11" * 8,
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)
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await pubsubs_fsub[0].handle_talk(msg_1)
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assert (
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len(pubsubs_fsub[0].my_topics) == 1
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and sub == pubsubs_fsub[0].my_topics[TESTING_TOPIC]
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)
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assert sub.qsize() == 1
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assert (await sub.get()) == msg_0
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@pytest.mark.parametrize("num_hosts", (1,))
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@pytest.mark.asyncio
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async def test_message_all_peers(pubsubs_fsub, monkeypatch):
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peer_ids = [ID(b"\x12\x20" + i.to_bytes(32, "big")) for i in range(10)]
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mock_peers = {str(peer_id): FakeNetStream() for peer_id in peer_ids}
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monkeypatch.setattr(pubsubs_fsub[0], "peers", mock_peers)
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empty_rpc = rpc_pb2.RPC()
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await pubsubs_fsub[0].message_all_peers(empty_rpc.SerializeToString())
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for stream in mock_peers.values():
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assert (await stream.read()) == empty_rpc.SerializeToString()
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@pytest.mark.parametrize("num_hosts", (1,))
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@pytest.mark.asyncio
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async def test_publish(pubsubs_fsub, monkeypatch):
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msg_forwarders = []
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msgs = []
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async def push_msg(msg_forwarder, msg):
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msg_forwarders.append(msg_forwarder)
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msgs.append(msg)
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monkeypatch.setattr(pubsubs_fsub[0], "push_msg", push_msg)
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await pubsubs_fsub[0].publish(TESTING_TOPIC, TESTING_DATA)
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await pubsubs_fsub[0].publish(TESTING_TOPIC, TESTING_DATA)
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assert len(msgs) == 2, "`push_msg` should be called every time `publish` is called"
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assert (msg_forwarders[0] == msg_forwarders[1]) and (
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msg_forwarders[1] == pubsubs_fsub[0].my_id
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)
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assert msgs[0].seqno != msgs[1].seqno, "`seqno` should be different every time"
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@pytest.mark.parametrize("num_hosts", (1,))
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@pytest.mark.asyncio
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async def test_push_msg(pubsubs_fsub, monkeypatch):
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# pylint: disable=protected-access
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msg_0 = make_pubsub_msg(
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origin_id=pubsubs_fsub[0].my_id,
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topic_ids=[TESTING_TOPIC],
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data=TESTING_DATA,
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seqno=b"\x00" * 8,
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)
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event = asyncio.Event()
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async def router_publish(*args, **kwargs):
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event.set()
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monkeypatch.setattr(pubsubs_fsub[0].router, "publish", router_publish)
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# Test: `msg` is not seen before `push_msg`, and is seen after `push_msg`.
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assert not pubsubs_fsub[0]._is_msg_seen(msg_0)
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await pubsubs_fsub[0].push_msg(pubsubs_fsub[0].my_id, msg_0)
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assert pubsubs_fsub[0]._is_msg_seen(msg_0)
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# Test: Ensure `router.publish` is called in `push_msg`
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await asyncio.wait_for(event.wait(), timeout=0.1)
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# Test: `push_msg` the message again and it will be reject.
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# `router_publish` is not called then.
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event.clear()
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await pubsubs_fsub[0].push_msg(pubsubs_fsub[0].my_id, msg_0)
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await asyncio.sleep(0.01)
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assert not event.is_set()
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sub = await pubsubs_fsub[0].subscribe(TESTING_TOPIC)
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# Test: `push_msg` succeeds with another unseen msg.
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msg_1 = make_pubsub_msg(
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origin_id=pubsubs_fsub[0].my_id,
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topic_ids=[TESTING_TOPIC],
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data=TESTING_DATA,
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seqno=b"\x11" * 8,
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)
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assert not pubsubs_fsub[0]._is_msg_seen(msg_1)
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await pubsubs_fsub[0].push_msg(pubsubs_fsub[0].my_id, msg_1)
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assert pubsubs_fsub[0]._is_msg_seen(msg_1)
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await asyncio.wait_for(event.wait(), timeout=0.1)
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# Test: Subscribers are notified when `push_msg` new messages.
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assert (await sub.get()) == msg_1
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