Reduce log spam from unauthenticated websocket connections (#151388)

tests/components/websocket_api/test_http.py

@@ -2,6 +2,7 @@
 
 import asyncio
 from datetime import timedelta
+import logging
 from typing import Any, cast
 from unittest.mock import patch
 
@@ -20,7 +21,11 @@ from homeassistant.setup import async_setup_component
 from homeassistant.util.dt import utcnow
 
 from tests.common import async_call_logger_set_level, async_fire_time_changed
-from tests.typing import MockHAClientWebSocket, WebSocketGenerator
+from tests.typing import (
+    ClientSessionGenerator,
+    MockHAClientWebSocket,
+    WebSocketGenerator,
+)
 
 
 @pytest.fixture
@@ -400,6 +405,48 @@ async def test_prepare_fail_connection_reset(
     assert "Connection reset by peer while preparing WebSocket" in caplog.text
 
 
+async def test_auth_timeout_logs_at_debug(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test auth timeout is logged at debug level not warning."""
+    # Setup websocket API
+    assert await async_setup_component(hass, "websocket_api", {})
+
+    client = await hass_client()
+
+    # Patch the auth timeout to be very short (0.001 seconds)
+    with (
+        caplog.at_level(logging.DEBUG, "homeassistant.components.websocket_api"),
+        patch(
+            "homeassistant.components.websocket_api.http.AUTH_MESSAGE_TIMEOUT", 0.001
+        ),
+    ):
+        # Try to connect - will timeout quickly since we don't send auth
+        ws = await client.ws_connect("/api/websocket")
+        # Wait a bit for the timeout to trigger and cleanup to complete
+        await asyncio.sleep(0.1)
+        await ws.close()
+        await asyncio.sleep(0.1)
+
+        # Check that "Did not receive auth message" is logged at debug, not warning
+        debug_messages = [
+            r.message for r in caplog.records if r.levelno == logging.DEBUG
+        ]
+        assert any(
+            "Disconnected during auth phase: Did not receive auth message" in msg
+            for msg in debug_messages
+        )
+
+        # Check it's NOT logged at warning level
+        warning_messages = [
+            r.message for r in caplog.records if r.levelno >= logging.WARNING
+        ]
+        for msg in warning_messages:
+            assert "Did not receive auth message" not in msg
+
+
 async def test_enable_coalesce(
     hass: HomeAssistant,
     hass_ws_client: WebSocketGenerator,