/
retrying_connection_test.py
113 lines (88 loc) · 3.32 KB
/
retrying_connection_test.py
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import asyncio
from asynctest.mock import MagicMock, CoroutineMock
import pytest
from google.api_core.exceptions import InternalServerError, InvalidArgument
from google.cloud.pubsublite.internal.wire.connection import (
Connection,
ConnectionFactory,
)
from google.cloud.pubsublite.internal.wire.connection_reinitializer import (
ConnectionReinitializer,
)
from google.cloud.pubsublite.internal.wire.retrying_connection import (
RetryingConnection,
_MIN_BACKOFF_SECS,
)
from google.cloud.pubsublite.testing.test_utils import wire_queues
# All test coroutines will be treated as marked.
pytestmark = pytest.mark.asyncio
@pytest.fixture()
def reinitializer():
return MagicMock(spec=ConnectionReinitializer)
@pytest.fixture()
def default_connection():
conn = MagicMock(spec=Connection)
conn.__aenter__.return_value = conn
return conn
@pytest.fixture()
def connection_factory(default_connection):
factory = MagicMock(spec=ConnectionFactory)
factory.new.return_value = default_connection
return factory
@pytest.fixture()
def retrying_connection(connection_factory, reinitializer):
return RetryingConnection(connection_factory, reinitializer)
@pytest.fixture
def asyncio_sleep(monkeypatch):
"""Requests.get() mocked to return {'mock_key':'mock_response'}."""
mock = CoroutineMock()
monkeypatch.setattr(asyncio, "sleep", mock)
return mock
async def test_permanent_error_on_reinitializer(
retrying_connection: Connection[int, int], reinitializer, default_connection
):
async def reinit_action(conn):
assert conn == default_connection
raise InvalidArgument("abc")
reinitializer.reinitialize.side_effect = reinit_action
with pytest.raises(InvalidArgument):
async with retrying_connection as _:
pass
async def test_successful_reinitialize(
retrying_connection: Connection[int, int], reinitializer, default_connection
):
async def reinit_action(conn):
assert conn == default_connection
return None
default_connection.read.return_value = 1
reinitializer.reinitialize.side_effect = reinit_action
async with retrying_connection as _:
assert await retrying_connection.read() == 1
assert (
default_connection.read.call_count == 2
) # re-call to read once first completes
write_fut = asyncio.Future()
async def write_action(val: int):
assert val == 2
write_fut.set_result(None)
default_connection.write.side_effect = write_action
await retrying_connection.write(2)
await write_fut
default_connection.write.assert_called_once()
async def test_reinitialize_after_retryable(
retrying_connection: Connection[int, int],
reinitializer,
default_connection,
asyncio_sleep,
):
reinit_queues = wire_queues(reinitializer.reinitialize)
default_connection.read.return_value = 1
await reinit_queues.results.put(InternalServerError("abc"))
await reinit_queues.results.put(None)
async with retrying_connection as _:
asyncio_sleep.assert_called_once_with(_MIN_BACKOFF_SECS)
assert reinitializer.reinitialize.call_count == 2
assert await retrying_connection.read() == 1
assert (
default_connection.read.call_count == 2
) # re-call to read once first completes