210 lines
7.0 KiB
Python
210 lines
7.0 KiB
Python
import pytest
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import trio
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from trio.testing import wait_all_tasks_blocked
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from libp2p.stream_muxer.mplex.exceptions import (
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MplexStreamClosed,
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MplexStreamEOF,
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MplexStreamReset,
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)
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from libp2p.stream_muxer.mplex.mplex import MPLEX_MESSAGE_CHANNEL_SIZE
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from libp2p.tools.constants import MAX_READ_LEN
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DATA = b"data_123"
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@pytest.mark.trio
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async def test_mplex_stream_read_write(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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await stream_0.write(DATA)
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assert (await stream_1.read(MAX_READ_LEN)) == DATA
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@pytest.mark.trio
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async def test_mplex_stream_full_buffer(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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# Test: The message channel is of size `MPLEX_MESSAGE_CHANNEL_SIZE`.
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# It should be fine to read even there are already `MPLEX_MESSAGE_CHANNEL_SIZE`
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# messages arriving.
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for _ in range(MPLEX_MESSAGE_CHANNEL_SIZE):
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await stream_0.write(DATA)
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await wait_all_tasks_blocked()
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# Sanity check
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assert MAX_READ_LEN >= MPLEX_MESSAGE_CHANNEL_SIZE * len(DATA)
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assert (await stream_1.read(MAX_READ_LEN)) == MPLEX_MESSAGE_CHANNEL_SIZE * DATA
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# Test: Read after `MPLEX_MESSAGE_CHANNEL_SIZE + 1` messages has arrived, which
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# exceeds the channel size. The stream should have been reset.
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for _ in range(MPLEX_MESSAGE_CHANNEL_SIZE + 1):
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await stream_0.write(DATA)
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await wait_all_tasks_blocked()
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with pytest.raises(MplexStreamReset):
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await stream_1.read(MAX_READ_LEN)
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@pytest.mark.trio
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async def test_mplex_stream_pair_read_until_eof(mplex_stream_pair):
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read_bytes = bytearray()
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stream_0, stream_1 = mplex_stream_pair
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async def read_until_eof():
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read_bytes.extend(await stream_1.read())
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expected_data = bytearray()
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async with trio.open_nursery() as nursery:
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nursery.start_soon(read_until_eof)
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# Test: `read` doesn't return before `close` is called.
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await stream_0.write(DATA)
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expected_data.extend(DATA)
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await trio.sleep(0.01)
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assert len(read_bytes) == 0
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# Test: `read` doesn't return before `close` is called.
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await stream_0.write(DATA)
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expected_data.extend(DATA)
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await trio.sleep(0.01)
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assert len(read_bytes) == 0
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# Test: Close the stream, `read` returns, and receive previous sent data.
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await stream_0.close()
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assert read_bytes == expected_data
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@pytest.mark.trio
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async def test_mplex_stream_read_after_remote_closed(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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assert not stream_1.event_remote_closed.is_set()
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await stream_0.write(DATA)
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assert not stream_0.event_local_closed.is_set()
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await trio.sleep(0.01)
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await wait_all_tasks_blocked()
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await stream_0.close()
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assert stream_0.event_local_closed.is_set()
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await trio.sleep(0.01)
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await wait_all_tasks_blocked()
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assert stream_1.event_remote_closed.is_set()
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assert (await stream_1.read(MAX_READ_LEN)) == DATA
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with pytest.raises(MplexStreamEOF):
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await stream_1.read(MAX_READ_LEN)
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@pytest.mark.trio
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async def test_mplex_stream_read_after_local_reset(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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await stream_0.reset()
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with pytest.raises(MplexStreamReset):
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await stream_0.read(MAX_READ_LEN)
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@pytest.mark.trio
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async def test_mplex_stream_read_after_remote_reset(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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await stream_0.write(DATA)
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await stream_0.reset()
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# Sleep to let `stream_1` receive the message.
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await trio.sleep(0.1)
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await wait_all_tasks_blocked()
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with pytest.raises(MplexStreamReset):
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await stream_1.read(MAX_READ_LEN)
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@pytest.mark.trio
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async def test_mplex_stream_read_after_remote_closed_and_reset(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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await stream_0.write(DATA)
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await stream_0.close()
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await stream_0.reset()
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# Sleep to let `stream_1` receive the message.
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await trio.sleep(0.01)
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assert (await stream_1.read(MAX_READ_LEN)) == DATA
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@pytest.mark.trio
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async def test_mplex_stream_write_after_local_closed(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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await stream_0.write(DATA)
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await stream_0.close()
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with pytest.raises(MplexStreamClosed):
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await stream_0.write(DATA)
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@pytest.mark.trio
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async def test_mplex_stream_write_after_local_reset(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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await stream_0.reset()
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with pytest.raises(MplexStreamClosed):
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await stream_0.write(DATA)
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@pytest.mark.trio
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async def test_mplex_stream_write_after_remote_reset(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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await stream_1.reset()
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await trio.sleep(0.01)
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with pytest.raises(MplexStreamClosed):
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await stream_0.write(DATA)
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@pytest.mark.trio
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async def test_mplex_stream_both_close(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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# Flags are not set initially.
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assert not stream_0.event_local_closed.is_set()
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assert not stream_1.event_local_closed.is_set()
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assert not stream_0.event_remote_closed.is_set()
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assert not stream_1.event_remote_closed.is_set()
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# Streams are present in their `mplex_conn`.
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assert stream_0 in stream_0.muxed_conn.streams.values()
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assert stream_1 in stream_1.muxed_conn.streams.values()
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# Test: Close one side.
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await stream_0.close()
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await trio.sleep(0.01)
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assert stream_0.event_local_closed.is_set()
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assert not stream_1.event_local_closed.is_set()
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assert not stream_0.event_remote_closed.is_set()
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assert stream_1.event_remote_closed.is_set()
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# Streams are still present in their `mplex_conn`.
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assert stream_0 in stream_0.muxed_conn.streams.values()
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assert stream_1 in stream_1.muxed_conn.streams.values()
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# Test: Close the other side.
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await stream_1.close()
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await trio.sleep(0.01)
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# Both sides are closed.
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assert stream_0.event_local_closed.is_set()
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assert stream_1.event_local_closed.is_set()
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assert stream_0.event_remote_closed.is_set()
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assert stream_1.event_remote_closed.is_set()
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# Streams are removed from their `mplex_conn`.
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assert stream_0 not in stream_0.muxed_conn.streams.values()
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assert stream_1 not in stream_1.muxed_conn.streams.values()
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# Test: Reset after both close.
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await stream_0.reset()
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@pytest.mark.trio
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async def test_mplex_stream_reset(mplex_stream_pair):
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stream_0, stream_1 = mplex_stream_pair
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await stream_0.reset()
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await trio.sleep(0.01)
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# Both sides are closed.
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assert stream_0.event_local_closed.is_set()
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assert stream_1.event_local_closed.is_set()
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assert stream_0.event_remote_closed.is_set()
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assert stream_1.event_remote_closed.is_set()
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# Streams are removed from their `mplex_conn`.
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assert stream_0 not in stream_0.muxed_conn.streams.values()
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assert stream_1 not in stream_1.muxed_conn.streams.values()
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# `close` should do nothing.
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await stream_0.close()
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await stream_1.close()
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# `reset` should do nothing as well.
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await stream_0.reset()
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await stream_1.reset()
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