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import asyncio
from contextlib import suppress
from unittest import mock
import pytest
from aiohttp.base_protocol import BaseProtocol
async def test_loop() -> None:
loop = asyncio.get_event_loop()
asyncio.set_event_loop(None)
pr = BaseProtocol(loop)
assert pr._loop is loop
async def test_pause_writing() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop)
assert not pr._paused
pr.pause_writing()
assert pr._paused
async def test_pause_reading_no_transport() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop)
assert not pr._reading_paused
pr.pause_reading()
assert not pr._reading_paused
async def test_pause_reading_stub_transport() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop)
tr = asyncio.Transport()
pr.transport = tr
assert not pr._reading_paused
pr.pause_reading()
assert pr._reading_paused
async def test_resume_reading_no_transport() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop)
pr._reading_paused = True
pr.resume_reading()
assert pr._reading_paused
async def test_resume_reading_stub_transport() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop)
tr = asyncio.Transport()
pr.transport = tr
pr._reading_paused = True
pr.resume_reading()
assert not pr._reading_paused
async def test_resume_writing_no_waiters() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
pr.pause_writing()
assert pr._paused
pr.resume_writing()
assert not pr._paused
async def test_resume_writing_waiter_done() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
waiter = mock.Mock(done=mock.Mock(return_value=True))
pr._drain_waiter = waiter
pr._paused = True
pr.resume_writing()
assert not pr._paused
assert waiter.mock_calls == [mock.call.done()]
async def test_connection_made() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
assert pr.transport is None
pr.connection_made(tr)
assert pr.transport is not None
async def test_connection_lost_not_paused() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
assert pr.connected
pr.connection_lost(None)
assert pr.transport is None
assert not pr.connected
async def test_connection_lost_paused_without_waiter() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
assert pr.connected
pr.pause_writing()
pr.connection_lost(None)
assert pr.transport is None
assert not pr.connected
async def test_connection_lost_waiter_done() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
pr._paused = True
waiter = mock.Mock(done=mock.Mock(return_value=True))
pr._drain_waiter = waiter
pr.connection_lost(None)
assert pr._drain_waiter is None
assert waiter.mock_calls == [mock.call.done()]
async def test_drain_lost() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
pr.connection_lost(None)
with pytest.raises(ConnectionResetError):
await pr._drain_helper()
async def test_drain_not_paused() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
assert pr._drain_waiter is None
await pr._drain_helper()
assert pr._drain_waiter is None
async def test_resume_drain_waited() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
pr.pause_writing()
t = loop.create_task(pr._drain_helper())
await asyncio.sleep(0)
assert pr._drain_waiter is not None
pr.resume_writing()
assert (await t) is None
assert pr._drain_waiter is None
async def test_lost_drain_waited_ok() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
pr.pause_writing()
t = loop.create_task(pr._drain_helper())
await asyncio.sleep(0)
assert pr._drain_waiter is not None
pr.connection_lost(None)
assert (await t) is None
assert pr._drain_waiter is None
async def test_lost_drain_waited_exception() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
pr.pause_writing()
t = loop.create_task(pr._drain_helper())
await asyncio.sleep(0)
assert pr._drain_waiter is not None
exc = RuntimeError()
pr.connection_lost(exc)
with pytest.raises(ConnectionError, match=r"^Connection lost$") as cm:
await t
assert cm.value.__cause__ is exc
assert pr._drain_waiter is None
async def test_lost_drain_cancelled() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
pr.pause_writing()
fut = loop.create_future()
async def wait():
fut.set_result(None)
await pr._drain_helper()
t = loop.create_task(wait())
await fut
t.cancel()
assert pr._drain_waiter is not None
pr.connection_lost(None)
with suppress(asyncio.CancelledError):
await t
assert pr._drain_waiter is None
async def test_resume_drain_cancelled() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
pr.pause_writing()
fut = loop.create_future()
async def wait():
fut.set_result(None)
await pr._drain_helper()
t = loop.create_task(wait())
await fut
t.cancel()
assert pr._drain_waiter is not None
pr.resume_writing()
with suppress(asyncio.CancelledError):
await t
assert pr._drain_waiter is None
async def test_parallel_drain_race_condition() -> None:
loop = asyncio.get_event_loop()
pr = BaseProtocol(loop=loop)
tr = mock.Mock()
pr.connection_made(tr)
pr.pause_writing()
ts = [loop.create_task(pr._drain_helper()) for _ in range(5)]
assert not (await asyncio.wait(ts, timeout=0.5))[
0
], "All draining tasks must be pending"
assert pr._drain_waiter is not None
pr.resume_writing()
await asyncio.gather(*ts)
assert pr._drain_waiter is None
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