py-libp2p/tests/network/test_swarm.py

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import asyncio
import pytest
from libp2p.network.exceptions import SwarmException
from tests.factories import ListeningSwarmFactory
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from tests.utils import connect_swarm
@pytest.mark.asyncio
async def test_swarm_dial_peer(is_host_secure):
swarms = await ListeningSwarmFactory.create_batch_and_listen(is_host_secure, 3)
# Test: No addr found.
with pytest.raises(SwarmException):
await swarms[0].dial_peer(swarms[1].get_peer_id())
# Test: len(addr) in the peerstore is 0.
swarms[0].peerstore.add_addrs(swarms[1].get_peer_id(), [], 10000)
with pytest.raises(SwarmException):
await swarms[0].dial_peer(swarms[1].get_peer_id())
# Test: Succeed if addrs of the peer_id are present in the peerstore.
addrs = tuple(
addr
for transport in swarms[1].listeners.values()
for addr in transport.get_addrs()
)
swarms[0].peerstore.add_addrs(swarms[1].get_peer_id(), addrs, 10000)
await swarms[0].dial_peer(swarms[1].get_peer_id())
assert swarms[0].get_peer_id() in swarms[1].connections
assert swarms[1].get_peer_id() in swarms[0].connections
# Test: Reuse connections when we already have ones with a peer.
conn_to_1 = swarms[0].connections[swarms[1].get_peer_id()]
conn = await swarms[0].dial_peer(swarms[1].get_peer_id())
assert conn is conn_to_1
# Clean up
await asyncio.gather(*[swarm.close() for swarm in swarms])
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@pytest.mark.asyncio
async def test_swarm_close_peer(is_host_secure):
swarms = await ListeningSwarmFactory.create_batch_and_listen(is_host_secure, 3)
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# 0 <> 1 <> 2
await connect_swarm(swarms[0], swarms[1])
await connect_swarm(swarms[1], swarms[2])
# peer 1 closes peer 0
await swarms[1].close_peer(swarms[0].get_peer_id())
await asyncio.sleep(0.01)
# 0 1 <> 2
assert len(swarms[0].connections) == 0
assert (
len(swarms[1].connections) == 1
and swarms[2].get_peer_id() in swarms[1].connections
)
# peer 1 is closed by peer 2
await swarms[2].close_peer(swarms[1].get_peer_id())
await asyncio.sleep(0.01)
# 0 1 2
assert len(swarms[1].connections) == 0 and len(swarms[2].connections) == 0
await connect_swarm(swarms[0], swarms[1])
# 0 <> 1 2
assert (
len(swarms[0].connections) == 1
and swarms[1].get_peer_id() in swarms[0].connections
)
assert (
len(swarms[1].connections) == 1
and swarms[0].get_peer_id() in swarms[1].connections
)
# peer 0 closes peer 1
await swarms[0].close_peer(swarms[1].get_peer_id())
await asyncio.sleep(0.01)
# 0 1 2
assert len(swarms[1].connections) == 0 and len(swarms[2].connections) == 0
# Clean up
await asyncio.gather(*[swarm.close() for swarm in swarms])
@pytest.mark.asyncio
async def test_swarm_remove_conn(swarm_pair):
swarm_0, swarm_1 = swarm_pair
conn_0 = swarm_0.connections[swarm_1.get_peer_id()]
swarm_0.remove_conn(conn_0)
assert swarm_1.get_peer_id() not in swarm_0.connections
# Test: Remove twice. There should not be errors.
swarm_0.remove_conn(conn_0)
assert swarm_1.get_peer_id() not in swarm_0.connections