py-libp2p/tests/protocol_muxer/test_protocol_muxer.py

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import pytest
from libp2p.protocol_muxer.exceptions import MultiselectClientError
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from tests.utils import cleanup, set_up_nodes_by_transport_opt
# TODO: Add tests for multiple streams being opened on different
# protocols through the same connection
# Note: async issues occurred when using the same port
# so that's why I use different ports here.
# TODO: modify tests so that those async issues don't occur
# when using the same ports across tests
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async def perform_simple_test(
expected_selected_protocol, protocols_for_client, protocols_with_handlers
):
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transport_opt_list = [["/ip4/127.0.0.1/tcp/0"], ["/ip4/127.0.0.1/tcp/0"]]
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(node_a, node_b) = await set_up_nodes_by_transport_opt(transport_opt_list)
async def stream_handler(stream):
while True:
read_string = (await stream.read()).decode()
response = "ack:" + read_string
await stream.write(response.encode())
for protocol in protocols_with_handlers:
node_b.set_stream_handler(protocol, stream_handler)
# Associate the peer with local ip address (see default parameters of Libp2p())
node_a.get_peerstore().add_addrs(node_b.get_id(), node_b.get_addrs(), 10)
stream = await node_a.new_stream(node_b.get_id(), protocols_for_client)
messages = ["hello" + str(x) for x in range(10)]
for message in messages:
await stream.write(message.encode())
response = (await stream.read()).decode()
assert response == ("ack:" + message)
assert expected_selected_protocol == stream.get_protocol()
# Success, terminate pending tasks.
await cleanup()
@pytest.mark.asyncio
async def test_single_protocol_succeeds():
expected_selected_protocol = "/echo/1.0.0"
await perform_simple_test(
expected_selected_protocol, ["/echo/1.0.0"], ["/echo/1.0.0"]
)
@pytest.mark.asyncio
async def test_single_protocol_fails():
with pytest.raises(MultiselectClientError):
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await perform_simple_test("", ["/echo/1.0.0"], ["/potato/1.0.0"])
# Cleanup not reached on error
await cleanup()
@pytest.mark.asyncio
async def test_multiple_protocol_first_is_valid_succeeds():
expected_selected_protocol = "/echo/1.0.0"
protocols_for_client = ["/echo/1.0.0", "/potato/1.0.0"]
protocols_for_listener = ["/foo/1.0.0", "/echo/1.0.0"]
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await perform_simple_test(
expected_selected_protocol, protocols_for_client, protocols_for_listener
)
@pytest.mark.asyncio
async def test_multiple_protocol_second_is_valid_succeeds():
expected_selected_protocol = "/foo/1.0.0"
protocols_for_client = ["/rock/1.0.0", "/foo/1.0.0"]
protocols_for_listener = ["/foo/1.0.0", "/echo/1.0.0"]
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await perform_simple_test(
expected_selected_protocol, protocols_for_client, protocols_for_listener
)
@pytest.mark.asyncio
async def test_multiple_protocol_fails():
protocols_for_client = ["/rock/1.0.0", "/foo/1.0.0", "/bar/1.0.0"]
protocols_for_listener = ["/aspyn/1.0.0", "/rob/1.0.0", "/zx/1.0.0", "/alex/1.0.0"]
with pytest.raises(MultiselectClientError):
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await perform_simple_test("", protocols_for_client, protocols_for_listener)
# Cleanup not reached on error
await cleanup()