Refactor: PHASE 8: Testing & Integration

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ziesorx 2025-09-12 18:55:23 +07:00
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"""
Unit tests for WebSocket handling functionality.
"""
import pytest
import asyncio
import json
from unittest.mock import Mock, AsyncMock, patch, MagicMock
from fastapi.websockets import WebSocket, WebSocketDisconnect
import uuid
from detector_worker.communication.websocket_handler import (
WebSocketHandler,
ConnectionManager,
WebSocketConnection,
MessageHandler,
WebSocketError,
ConnectionError as WSConnectionError
)
from detector_worker.communication.message_processor import MessageType
from detector_worker.core.exceptions import MessageProcessingError
class TestWebSocketConnection:
"""Test WebSocket connection wrapper."""
def test_creation(self, mock_websocket):
"""Test WebSocket connection creation."""
connection = WebSocketConnection(mock_websocket, "client_001")
assert connection.websocket == mock_websocket
assert connection.client_id == "client_001"
assert connection.is_connected is False
assert connection.connected_at is None
assert connection.last_ping is None
assert connection.subscription_id is None
@pytest.mark.asyncio
async def test_accept_connection(self, mock_websocket):
"""Test accepting WebSocket connection."""
connection = WebSocketConnection(mock_websocket, "client_001")
mock_websocket.accept = AsyncMock()
await connection.accept()
assert connection.is_connected is True
assert connection.connected_at is not None
mock_websocket.accept.assert_called_once()
@pytest.mark.asyncio
async def test_send_message_json(self, mock_websocket):
"""Test sending JSON message."""
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
mock_websocket.send_json = AsyncMock()
message = {"type": "test", "data": "hello"}
await connection.send_message(message)
mock_websocket.send_json.assert_called_once_with(message)
@pytest.mark.asyncio
async def test_send_message_text(self, mock_websocket):
"""Test sending text message."""
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
mock_websocket.send_text = AsyncMock()
await connection.send_message("hello world")
mock_websocket.send_text.assert_called_once_with("hello world")
@pytest.mark.asyncio
async def test_send_message_not_connected(self, mock_websocket):
"""Test sending message when not connected."""
connection = WebSocketConnection(mock_websocket, "client_001")
# Don't set is_connected = True
with pytest.raises(WebSocketError) as exc_info:
await connection.send_message({"type": "test"})
assert "not connected" in str(exc_info.value).lower()
@pytest.mark.asyncio
async def test_receive_message_json(self, mock_websocket):
"""Test receiving JSON message."""
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
mock_websocket.receive_json = AsyncMock(return_value={"type": "test", "data": "received"})
message = await connection.receive_message()
assert message == {"type": "test", "data": "received"}
mock_websocket.receive_json.assert_called_once()
@pytest.mark.asyncio
async def test_receive_message_text(self, mock_websocket):
"""Test receiving text message."""
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
# Mock receive_json to fail, then receive_text to succeed
mock_websocket.receive_json = AsyncMock(side_effect=json.JSONDecodeError("Invalid JSON", "", 0))
mock_websocket.receive_text = AsyncMock(return_value="plain text message")
message = await connection.receive_message()
assert message == "plain text message"
mock_websocket.receive_text.assert_called_once()
@pytest.mark.asyncio
async def test_ping_pong(self, mock_websocket):
"""Test ping/pong functionality."""
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
mock_websocket.ping = AsyncMock()
await connection.ping()
assert connection.last_ping is not None
mock_websocket.ping.assert_called_once()
@pytest.mark.asyncio
async def test_close_connection(self, mock_websocket):
"""Test closing connection."""
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
mock_websocket.close = AsyncMock()
await connection.close(code=1000, reason="Normal closure")
assert connection.is_connected is False
mock_websocket.close.assert_called_once_with(code=1000, reason="Normal closure")
def test_connection_info(self, mock_websocket):
"""Test getting connection information."""
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
connection.subscription_id = "sub_123"
info = connection.get_connection_info()
assert info["client_id"] == "client_001"
assert info["is_connected"] is True
assert info["subscription_id"] == "sub_123"
assert "connected_at" in info
assert "last_ping" in info
class TestConnectionManager:
"""Test WebSocket connection management."""
def test_initialization(self):
"""Test connection manager initialization."""
manager = ConnectionManager()
assert len(manager.connections) == 0
assert len(manager.subscriptions) == 0
assert manager.max_connections == 100
@pytest.mark.asyncio
async def test_add_connection(self, mock_websocket):
"""Test adding a connection."""
manager = ConnectionManager()
client_id = "client_001"
connection = await manager.add_connection(mock_websocket, client_id)
assert connection.client_id == client_id
assert client_id in manager.connections
assert manager.get_connection_count() == 1
@pytest.mark.asyncio
async def test_remove_connection(self, mock_websocket):
"""Test removing a connection."""
manager = ConnectionManager()
client_id = "client_001"
await manager.add_connection(mock_websocket, client_id)
assert client_id in manager.connections
removed_connection = await manager.remove_connection(client_id)
assert removed_connection is not None
assert removed_connection.client_id == client_id
assert client_id not in manager.connections
assert manager.get_connection_count() == 0
def test_get_connection(self, mock_websocket):
"""Test getting a connection."""
manager = ConnectionManager()
client_id = "client_001"
# Manually add connection for testing
connection = WebSocketConnection(mock_websocket, client_id)
manager.connections[client_id] = connection
retrieved_connection = manager.get_connection(client_id)
assert retrieved_connection == connection
assert retrieved_connection.client_id == client_id
def test_get_nonexistent_connection(self):
"""Test getting non-existent connection."""
manager = ConnectionManager()
connection = manager.get_connection("nonexistent_client")
assert connection is None
@pytest.mark.asyncio
async def test_broadcast_message(self, mock_websocket):
"""Test broadcasting message to all connections."""
manager = ConnectionManager()
# Add multiple connections
connections = []
for i in range(3):
client_id = f"client_{i}"
ws = Mock()
ws.send_json = AsyncMock()
connection = WebSocketConnection(ws, client_id)
connection.is_connected = True
manager.connections[client_id] = connection
connections.append(connection)
message = {"type": "broadcast", "data": "hello all"}
await manager.broadcast(message)
# All connections should have received the message
for connection in connections:
connection.websocket.send_json.assert_called_once_with(message)
@pytest.mark.asyncio
async def test_broadcast_to_subscription(self, mock_websocket):
"""Test broadcasting to specific subscription."""
manager = ConnectionManager()
# Add connections with different subscriptions
subscription_id = "camera_001"
# Connection with target subscription
ws1 = Mock()
ws1.send_json = AsyncMock()
connection1 = WebSocketConnection(ws1, "client_001")
connection1.is_connected = True
connection1.subscription_id = subscription_id
manager.connections["client_001"] = connection1
manager.subscriptions[subscription_id] = {"client_001"}
# Connection with different subscription
ws2 = Mock()
ws2.send_json = AsyncMock()
connection2 = WebSocketConnection(ws2, "client_002")
connection2.is_connected = True
connection2.subscription_id = "camera_002"
manager.connections["client_002"] = connection2
manager.subscriptions["camera_002"] = {"client_002"}
message = {"type": "detection", "data": "camera detection"}
await manager.broadcast_to_subscription(subscription_id, message)
# Only connection1 should have received the message
ws1.send_json.assert_called_once_with(message)
ws2.send_json.assert_not_called()
def test_add_subscription(self):
"""Test adding subscription mapping."""
manager = ConnectionManager()
client_id = "client_001"
subscription_id = "camera_001"
manager.add_subscription(client_id, subscription_id)
assert subscription_id in manager.subscriptions
assert client_id in manager.subscriptions[subscription_id]
def test_remove_subscription(self):
"""Test removing subscription mapping."""
manager = ConnectionManager()
client_id = "client_001"
subscription_id = "camera_001"
# Add subscription first
manager.add_subscription(client_id, subscription_id)
assert client_id in manager.subscriptions[subscription_id]
# Remove subscription
manager.remove_subscription(client_id, subscription_id)
assert client_id not in manager.subscriptions.get(subscription_id, set())
def test_get_subscription_clients(self):
"""Test getting clients for a subscription."""
manager = ConnectionManager()
subscription_id = "camera_001"
clients = ["client_001", "client_002", "client_003"]
for client_id in clients:
manager.add_subscription(client_id, subscription_id)
subscription_clients = manager.get_subscription_clients(subscription_id)
assert subscription_clients == set(clients)
def test_get_client_subscriptions(self):
"""Test getting subscriptions for a client."""
manager = ConnectionManager()
client_id = "client_001"
subscriptions = ["camera_001", "camera_002", "camera_003"]
for subscription_id in subscriptions:
manager.add_subscription(client_id, subscription_id)
client_subscriptions = manager.get_client_subscriptions(client_id)
assert client_subscriptions == set(subscriptions)
@pytest.mark.asyncio
async def test_cleanup_disconnected_connections(self):
"""Test cleanup of disconnected connections."""
manager = ConnectionManager()
# Add connected and disconnected connections
ws1 = Mock()
connection1 = WebSocketConnection(ws1, "client_001")
connection1.is_connected = True
manager.connections["client_001"] = connection1
ws2 = Mock()
connection2 = WebSocketConnection(ws2, "client_002")
connection2.is_connected = False # Disconnected
manager.connections["client_002"] = connection2
# Add subscriptions
manager.add_subscription("client_001", "camera_001")
manager.add_subscription("client_002", "camera_002")
cleaned_count = await manager.cleanup_disconnected()
assert cleaned_count == 1
assert "client_001" in manager.connections # Still connected
assert "client_002" not in manager.connections # Cleaned up
# Subscriptions should also be cleaned up
assert manager.get_client_subscriptions("client_002") == set()
def test_get_connection_stats(self):
"""Test getting connection statistics."""
manager = ConnectionManager()
# Add various connections and subscriptions
for i in range(3):
client_id = f"client_{i}"
ws = Mock()
connection = WebSocketConnection(ws, client_id)
connection.is_connected = i < 2 # First 2 connected, last one disconnected
manager.connections[client_id] = connection
if i < 2: # Add subscriptions for connected clients
manager.add_subscription(client_id, f"camera_{i}")
stats = manager.get_connection_stats()
assert stats["total_connections"] == 3
assert stats["active_connections"] == 2
assert stats["total_subscriptions"] == 2
assert "uptime" in stats
class TestMessageHandler:
"""Test message handling functionality."""
def test_creation(self):
"""Test message handler creation."""
mock_processor = Mock()
handler = MessageHandler(mock_processor)
assert handler.message_processor == mock_processor
assert handler.connection_manager is None
def test_set_connection_manager(self):
"""Test setting connection manager."""
mock_processor = Mock()
mock_manager = Mock()
handler = MessageHandler(mock_processor)
handler.set_connection_manager(mock_manager)
assert handler.connection_manager == mock_manager
@pytest.mark.asyncio
async def test_handle_message_success(self, mock_websocket):
"""Test successful message handling."""
mock_processor = Mock()
mock_processor.process_message = AsyncMock(return_value={"type": "response", "status": "success"})
handler = MessageHandler(mock_processor)
connection = WebSocketConnection(mock_websocket, "client_001")
message = {"type": "subscribe", "payload": {"camera_id": "camera_001"}}
response = await handler.handle_message(connection, message)
assert response["status"] == "success"
mock_processor.process_message.assert_called_once_with(message, "client_001")
@pytest.mark.asyncio
async def test_handle_message_processing_error(self, mock_websocket):
"""Test message handling with processing error."""
mock_processor = Mock()
mock_processor.process_message = AsyncMock(side_effect=MessageProcessingError("Invalid message"))
handler = MessageHandler(mock_processor)
connection = WebSocketConnection(mock_websocket, "client_001")
message = {"type": "invalid", "payload": {}}
response = await handler.handle_message(connection, message)
assert response["type"] == "error"
assert "Invalid message" in response["message"]
@pytest.mark.asyncio
async def test_handle_message_unexpected_error(self, mock_websocket):
"""Test message handling with unexpected error."""
mock_processor = Mock()
mock_processor.process_message = AsyncMock(side_effect=Exception("Unexpected error"))
handler = MessageHandler(mock_processor)
connection = WebSocketConnection(mock_websocket, "client_001")
message = {"type": "test", "payload": {}}
response = await handler.handle_message(connection, message)
assert response["type"] == "error"
assert "internal error" in response["message"].lower()
@pytest.mark.asyncio
async def test_send_response(self, mock_websocket):
"""Test sending response to client."""
mock_processor = Mock()
handler = MessageHandler(mock_processor)
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
mock_websocket.send_json = AsyncMock()
response = {"type": "response", "data": "test response"}
await handler.send_response(connection, response)
mock_websocket.send_json.assert_called_once_with(response)
@pytest.mark.asyncio
async def test_send_error_response(self, mock_websocket):
"""Test sending error response."""
mock_processor = Mock()
handler = MessageHandler(mock_processor)
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
mock_websocket.send_json = AsyncMock()
await handler.send_error_response(connection, "Test error message", "TEST_ERROR")
mock_websocket.send_json.assert_called_once()
call_args = mock_websocket.send_json.call_args[0][0]
assert call_args["type"] == "error"
assert call_args["message"] == "Test error message"
assert call_args["error_code"] == "TEST_ERROR"
class TestWebSocketHandler:
"""Test main WebSocket handler functionality."""
def test_initialization(self):
"""Test WebSocket handler initialization."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
assert isinstance(handler.connection_manager, ConnectionManager)
assert isinstance(handler.message_handler, MessageHandler)
assert handler.message_handler.connection_manager == handler.connection_manager
assert handler.heartbeat_interval == 30.0
assert handler.max_connections == 100
def test_initialization_with_config(self):
"""Test initialization with custom configuration."""
mock_processor = Mock()
config = {
"heartbeat_interval": 60.0,
"max_connections": 200,
"connection_timeout": 300.0
}
handler = WebSocketHandler(mock_processor, config)
assert handler.heartbeat_interval == 60.0
assert handler.max_connections == 200
assert handler.connection_timeout == 300.0
@pytest.mark.asyncio
async def test_handle_websocket_connection(self, mock_websocket):
"""Test handling WebSocket connection."""
mock_processor = Mock()
mock_processor.process_message = AsyncMock(return_value={"type": "ack", "status": "success"})
handler = WebSocketHandler(mock_processor)
# Mock WebSocket behavior
mock_websocket.accept = AsyncMock()
mock_websocket.receive_json = AsyncMock(side_effect=[
{"type": "subscribe", "payload": {"camera_id": "camera_001"}},
WebSocketDisconnect() # Simulate disconnection
])
mock_websocket.send_json = AsyncMock()
client_id = "test_client_001"
# Handle connection (should not raise exception)
await handler.handle_websocket(mock_websocket, client_id)
# Verify connection was accepted
mock_websocket.accept.assert_called_once()
# Verify message was processed
mock_processor.process_message.assert_called_once()
@pytest.mark.asyncio
async def test_handle_websocket_max_connections(self, mock_websocket):
"""Test handling max connections limit."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor, {"max_connections": 1})
# Add one connection to reach limit
client1_ws = Mock()
connection1 = WebSocketConnection(client1_ws, "client_001")
handler.connection_manager.connections["client_001"] = connection1
mock_websocket.close = AsyncMock()
# Try to add second connection
await handler.handle_websocket(mock_websocket, "client_002")
# Should close connection due to limit
mock_websocket.close.assert_called_once()
@pytest.mark.asyncio
async def test_broadcast_message(self):
"""Test broadcasting message to all connections."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
# Mock connection manager
handler.connection_manager.broadcast = AsyncMock()
message = {"type": "system", "data": "Server maintenance in 10 minutes"}
await handler.broadcast_message(message)
handler.connection_manager.broadcast.assert_called_once_with(message)
@pytest.mark.asyncio
async def test_send_to_client(self):
"""Test sending message to specific client."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
# Create mock connection
mock_websocket = Mock()
mock_websocket.send_json = AsyncMock()
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
handler.connection_manager.connections["client_001"] = connection
message = {"type": "notification", "data": "Personal message"}
result = await handler.send_to_client("client_001", message)
assert result is True
mock_websocket.send_json.assert_called_once_with(message)
@pytest.mark.asyncio
async def test_send_to_nonexistent_client(self):
"""Test sending message to non-existent client."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
message = {"type": "notification", "data": "Message"}
result = await handler.send_to_client("nonexistent_client", message)
assert result is False
@pytest.mark.asyncio
async def test_send_to_subscription(self):
"""Test sending message to subscription."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
# Mock connection manager
handler.connection_manager.broadcast_to_subscription = AsyncMock()
subscription_id = "camera_001"
message = {"type": "detection", "data": {"class": "car", "confidence": 0.95}}
await handler.send_to_subscription(subscription_id, message)
handler.connection_manager.broadcast_to_subscription.assert_called_once_with(subscription_id, message)
@pytest.mark.asyncio
async def test_start_heartbeat_task(self):
"""Test starting heartbeat task."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor, {"heartbeat_interval": 0.1})
# Mock connection with ping capability
mock_websocket = Mock()
mock_websocket.ping = AsyncMock()
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
handler.connection_manager.connections["client_001"] = connection
# Start heartbeat task
heartbeat_task = asyncio.create_task(handler._heartbeat_loop())
# Let it run briefly
await asyncio.sleep(0.2)
# Cancel task
heartbeat_task.cancel()
try:
await heartbeat_task
except asyncio.CancelledError:
pass
# Should have sent at least one ping
assert mock_websocket.ping.called
def test_get_connection_stats(self):
"""Test getting connection statistics."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
# Add some mock connections
for i in range(3):
client_id = f"client_{i}"
ws = Mock()
connection = WebSocketConnection(ws, client_id)
connection.is_connected = True
handler.connection_manager.connections[client_id] = connection
stats = handler.get_connection_stats()
assert stats["total_connections"] == 3
assert stats["active_connections"] == 3
def test_get_client_info(self):
"""Test getting client information."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
# Add mock connection
mock_websocket = Mock()
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
connection.subscription_id = "camera_001"
handler.connection_manager.connections["client_001"] = connection
info = handler.get_client_info("client_001")
assert info is not None
assert info["client_id"] == "client_001"
assert info["is_connected"] is True
assert info["subscription_id"] == "camera_001"
@pytest.mark.asyncio
async def test_disconnect_client(self):
"""Test disconnecting specific client."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
# Add mock connection
mock_websocket = Mock()
mock_websocket.close = AsyncMock()
connection = WebSocketConnection(mock_websocket, "client_001")
connection.is_connected = True
handler.connection_manager.connections["client_001"] = connection
result = await handler.disconnect_client("client_001", code=1000, reason="Admin disconnect")
assert result is True
mock_websocket.close.assert_called_once_with(code=1000, reason="Admin disconnect")
@pytest.mark.asyncio
async def test_cleanup_connections(self):
"""Test cleanup of disconnected connections."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
# Mock connection manager cleanup
handler.connection_manager.cleanup_disconnected = AsyncMock(return_value=2)
cleaned_count = await handler.cleanup_connections()
assert cleaned_count == 2
handler.connection_manager.cleanup_disconnected.assert_called_once()
class TestWebSocketHandlerIntegration:
"""Integration tests for WebSocket handler."""
@pytest.mark.asyncio
async def test_complete_subscription_workflow(self, mock_websocket):
"""Test complete subscription workflow."""
mock_processor = Mock()
# Mock processor responses
mock_processor.process_message = AsyncMock(side_effect=[
{"type": "subscribeAck", "status": "success", "subscription_id": "camera_001"},
{"type": "unsubscribeAck", "status": "success"}
])
handler = WebSocketHandler(mock_processor)
# Mock WebSocket behavior
mock_websocket.accept = AsyncMock()
mock_websocket.send_json = AsyncMock()
mock_websocket.receive_json = AsyncMock(side_effect=[
{"type": "subscribe", "payload": {"camera_id": "camera_001", "rtsp_url": "rtsp://example.com"}},
{"type": "unsubscribe", "payload": {"subscription_id": "camera_001"}},
WebSocketDisconnect()
])
client_id = "test_client"
# Handle complete workflow
await handler.handle_websocket(mock_websocket, client_id)
# Verify both messages were processed
assert mock_processor.process_message.call_count == 2
# Verify responses were sent
assert mock_websocket.send_json.call_count == 2
@pytest.mark.asyncio
async def test_multiple_client_management(self):
"""Test managing multiple concurrent clients."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor)
clients = []
for i in range(5):
client_id = f"client_{i}"
mock_ws = Mock()
mock_ws.send_json = AsyncMock()
connection = WebSocketConnection(mock_ws, client_id)
connection.is_connected = True
handler.connection_manager.connections[client_id] = connection
clients.append(connection)
# Test broadcasting to all clients
message = {"type": "broadcast", "data": "Hello all clients"}
await handler.broadcast_message(message)
# All clients should receive the message
for connection in clients:
connection.websocket.send_json.assert_called_once_with(message)
# Test subscription-specific messaging
subscription_id = "camera_001"
handler.connection_manager.add_subscription("client_0", subscription_id)
handler.connection_manager.add_subscription("client_2", subscription_id)
subscription_message = {"type": "detection", "camera_id": "camera_001"}
await handler.send_to_subscription(subscription_id, subscription_message)
# Only subscribed clients should receive the message
# Note: This would require additional mocking of broadcast_to_subscription
@pytest.mark.asyncio
async def test_error_handling_and_recovery(self, mock_websocket):
"""Test error handling and recovery scenarios."""
mock_processor = Mock()
# First message causes error, second succeeds
mock_processor.process_message = AsyncMock(side_effect=[
MessageProcessingError("Invalid message format"),
{"type": "ack", "status": "success"}
])
handler = WebSocketHandler(mock_processor)
mock_websocket.accept = AsyncMock()
mock_websocket.send_json = AsyncMock()
mock_websocket.receive_json = AsyncMock(side_effect=[
{"type": "invalid", "malformed": True},
{"type": "valid", "payload": {"test": True}},
WebSocketDisconnect()
])
client_id = "error_test_client"
# Should handle errors gracefully and continue processing
await handler.handle_websocket(mock_websocket, client_id)
# Both messages should have been processed
assert mock_processor.process_message.call_count == 2
# Should have sent error response and success response
assert mock_websocket.send_json.call_count == 2
# First call should be error response
first_response = mock_websocket.send_json.call_args_list[0][0][0]
assert first_response["type"] == "error"
@pytest.mark.asyncio
async def test_connection_timeout_handling(self):
"""Test connection timeout handling."""
mock_processor = Mock()
handler = WebSocketHandler(mock_processor, {"connection_timeout": 0.1})
# Add connection that hasn't been active
mock_websocket = Mock()
connection = WebSocketConnection(mock_websocket, "timeout_client")
connection.is_connected = True
# Don't update last_ping to simulate timeout
handler.connection_manager.connections["timeout_client"] = connection
# Wait longer than timeout
await asyncio.sleep(0.2)
# Manual cleanup (in real implementation this would be automatic)
cleaned = await handler.cleanup_connections()
# Connection should be identified for cleanup
# (Actual timeout logic would need to be implemented in the cleanup method)