py-libp2p/tests/stream_muxer/test_mplex_stream.py

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2019-09-18 21:51:09 +08:00
import asyncio
import pytest
from libp2p.stream_muxer.mplex.exceptions import (
MplexStreamClosed,
MplexStreamEOF,
MplexStreamReset,
)
from libp2p.tools.constants import MAX_READ_LEN
2019-09-18 21:51:09 +08:00
DATA = b"data_123"
@pytest.mark.asyncio
async def test_mplex_stream_read_write(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
await stream_0.write(DATA)
assert (await stream_1.read(MAX_READ_LEN)) == DATA
@pytest.mark.asyncio
async def test_mplex_stream_pair_read_until_eof(mplex_stream_pair):
read_bytes = bytearray()
stream_0, stream_1 = mplex_stream_pair
async def read_until_eof():
read_bytes.extend(await stream_1.read())
task = asyncio.ensure_future(read_until_eof())
expected_data = bytearray()
# Test: `read` doesn't return before `close` is called.
await stream_0.write(DATA)
expected_data.extend(DATA)
await asyncio.sleep(0.01)
assert len(read_bytes) == 0
# Test: `read` doesn't return before `close` is called.
await stream_0.write(DATA)
expected_data.extend(DATA)
await asyncio.sleep(0.01)
assert len(read_bytes) == 0
# Test: Close the stream, `read` returns, and receive previous sent data.
await stream_0.close()
await asyncio.sleep(0.01)
assert read_bytes == expected_data
task.cancel()
@pytest.mark.asyncio
async def test_mplex_stream_read_after_remote_closed(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
assert not stream_1.event_remote_closed.is_set()
await stream_0.write(DATA)
await stream_0.close()
await asyncio.sleep(0.01)
assert stream_1.event_remote_closed.is_set()
assert (await stream_1.read(MAX_READ_LEN)) == DATA
with pytest.raises(MplexStreamEOF):
await stream_1.read(MAX_READ_LEN)
@pytest.mark.asyncio
async def test_mplex_stream_read_after_local_reset(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
await stream_0.reset()
with pytest.raises(MplexStreamReset):
await stream_0.read(MAX_READ_LEN)
@pytest.mark.asyncio
async def test_mplex_stream_read_after_remote_reset(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
await stream_0.write(DATA)
await stream_0.reset()
# Sleep to let `stream_1` receive the message.
await asyncio.sleep(0.01)
with pytest.raises(MplexStreamReset):
await stream_1.read(MAX_READ_LEN)
@pytest.mark.asyncio
async def test_mplex_stream_read_after_remote_closed_and_reset(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
await stream_0.write(DATA)
await stream_0.close()
await stream_0.reset()
# Sleep to let `stream_1` receive the message.
await asyncio.sleep(0.01)
assert (await stream_1.read(MAX_READ_LEN)) == DATA
@pytest.mark.asyncio
async def test_mplex_stream_write_after_local_closed(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
await stream_0.write(DATA)
await stream_0.close()
with pytest.raises(MplexStreamClosed):
await stream_0.write(DATA)
@pytest.mark.asyncio
async def test_mplex_stream_write_after_local_reset(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
await stream_0.reset()
with pytest.raises(MplexStreamClosed):
await stream_0.write(DATA)
@pytest.mark.asyncio
async def test_mplex_stream_write_after_remote_reset(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
await stream_1.reset()
await asyncio.sleep(0.01)
with pytest.raises(MplexStreamClosed):
await stream_0.write(DATA)
@pytest.mark.asyncio
async def test_mplex_stream_both_close(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
# Flags are not set initially.
assert not stream_0.event_local_closed.is_set()
assert not stream_1.event_local_closed.is_set()
assert not stream_0.event_remote_closed.is_set()
assert not stream_1.event_remote_closed.is_set()
# Streams are present in their `mplex_conn`.
assert stream_0 in stream_0.muxed_conn.streams.values()
assert stream_1 in stream_1.muxed_conn.streams.values()
# Test: Close one side.
await stream_0.close()
await asyncio.sleep(0.01)
assert stream_0.event_local_closed.is_set()
assert not stream_1.event_local_closed.is_set()
assert not stream_0.event_remote_closed.is_set()
assert stream_1.event_remote_closed.is_set()
# Streams are still present in their `mplex_conn`.
assert stream_0 in stream_0.muxed_conn.streams.values()
assert stream_1 in stream_1.muxed_conn.streams.values()
# Test: Close the other side.
await stream_1.close()
await asyncio.sleep(0.01)
# Both sides are closed.
assert stream_0.event_local_closed.is_set()
assert stream_1.event_local_closed.is_set()
assert stream_0.event_remote_closed.is_set()
assert stream_1.event_remote_closed.is_set()
# Streams are removed from their `mplex_conn`.
assert stream_0 not in stream_0.muxed_conn.streams.values()
assert stream_1 not in stream_1.muxed_conn.streams.values()
# Test: Reset after both close.
await stream_0.reset()
@pytest.mark.asyncio
async def test_mplex_stream_reset(mplex_stream_pair):
stream_0, stream_1 = mplex_stream_pair
await stream_0.reset()
await asyncio.sleep(0.01)
# Both sides are closed.
assert stream_0.event_local_closed.is_set()
assert stream_1.event_local_closed.is_set()
assert stream_0.event_remote_closed.is_set()
assert stream_1.event_remote_closed.is_set()
# Streams are removed from their `mplex_conn`.
assert stream_0 not in stream_0.muxed_conn.streams.values()
assert stream_1 not in stream_1.muxed_conn.streams.values()
# `close` should do nothing.
await stream_0.close()
await stream_1.close()
# `reset` should do nothing as well.
await stream_0.reset()
await stream_1.reset()