Add test to ensure log runner reconnects on subscribe failure (#757)

tests/test_log_runner.py

@@ -2,6 +2,7 @@
 
 import asyncio
 from datetime import timedelta
+from functools import partial
 from unittest.mock import MagicMock, patch
 
 import pytest
@@ -12,6 +13,7 @@
 from aioesphomeapi.api_pb2 import DisconnectRequest, DisconnectResponse
 from aioesphomeapi.client import APIClient
 from aioesphomeapi.connection import APIConnection
+from aioesphomeapi.core import APIConnectionError
 from aioesphomeapi.log_runner import async_run
 from aioesphomeapi.reconnect_logic import EXPECTED_DISCONNECT_COOLDOWN
 
@@ -164,3 +166,79 @@ async def _wait_subscribe_cli(*args, **kwargs):
     assert mock_start_connection.called
 
     await stop()
+
+
+@pytest.mark.asyncio
+async def test_log_runner_reconnects_on_subscribe_failure(
+    event_loop: asyncio.AbstractEventLoop,
+    conn: APIConnection,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test the log runner reconnects on subscribe failure."""
+    loop = asyncio.get_event_loop()
+    protocol: APIPlaintextFrameHelper | None = None
+    transport = MagicMock()
+    connected = asyncio.Event()
+
+    class PatchableAPIClient(APIClient):
+        pass
+
+    async_zeroconf = get_mock_async_zeroconf()
+
+    cli = PatchableAPIClient(
+        address=Estr("1.2.3.4"),
+        port=6052,
+        password=None,
+        noise_psk=None,
+        expected_name=Estr("fake"),
+        zeroconf_instance=async_zeroconf.zeroconf,
+    )
+    messages = []
+
+    def on_log(msg: SubscribeLogsResponse) -> None:
+        messages.append(msg)
+
+    def _create_mock_transport_protocol(create_func, **kwargs):
+        nonlocal protocol
+        protocol = create_func()
+        protocol.connection_made(transport)
+        connected.set()
+        return transport, protocol
+
+    subscribed = asyncio.Event()
+
+    async def _wait_and_fail_subscribe_cli(*args, **kwargs):
+        subscribed.set()
+        raise APIConnectionError("subscribed force to fail")
+
+    with patch.object(
+        cli, "disconnect", partial(cli.disconnect, force=True)
+    ), patch.object(cli, "subscribe_logs", _wait_and_fail_subscribe_cli):
+        with patch.object(loop, "sock_connect"), patch.object(
+            loop, "create_connection", side_effect=_create_mock_transport_protocol
+        ):
+            stop = await async_run(cli, on_log, aio_zeroconf_instance=async_zeroconf)
+            await connected.wait()
+            protocol = cli._connection._frame_helper
+            send_plaintext_hello(protocol)
+            send_plaintext_connect_response(protocol, False)
+
+        await subscribed.wait()
+
+    assert cli._connection is None
+
+    with patch.object(loop, "sock_connect"), patch.object(
+        loop, "create_connection", side_effect=_create_mock_transport_protocol
+    ), patch.object(cli, "subscribe_logs"):
+        connected.clear()
+        await asyncio.sleep(0)
+        async_fire_time_changed(
+            utcnow() + timedelta(seconds=EXPECTED_DISCONNECT_COOLDOWN)
+        )
+        await asyncio.sleep(0)
+
+    stop_task = asyncio.create_task(stop())
+    await asyncio.sleep(0)
+    disconnect_response = DisconnectResponse()
+    mock_data_received(protocol, generate_plaintext_packet(disconnect_response))
+    await stop_task