Fix flaky test_stream_source timeout in generic camera tests (#158506)

tests/components/generic/test_camera.py

@@ -4,7 +4,7 @@ import asyncio
 from datetime import timedelta
 from http import HTTPStatus
 from typing import Any
-from unittest.mock import patch
+from unittest.mock import AsyncMock, Mock, patch
 
 import aiohttp
 from freezegun.api import FrozenDateTimeFactory
@@ -37,7 +37,7 @@ from homeassistant.const import (
 from homeassistant.core import HomeAssistant
 from homeassistant.setup import async_setup_component
 
-from tests.common import Mock, MockConfigEntry
+from tests.common import MockConfigEntry
 from tests.typing import ClientSessionGenerator, WebSocketGenerator
 
 
@@ -353,10 +353,16 @@ async def test_stream_source(
     stream_source = await async_get_stream_source(hass, "camera.config_test")
     assert stream_source == "http://barney:betty@example.com/5a"
 
+    # Create a mock stream that doesn't actually try to connect
+    mock_stream = Mock()
+    mock_stream.add_provider = Mock()
+    mock_stream.start = AsyncMock()
+    mock_stream.endpoint_url = Mock(return_value="http://home.assistant/playlist.m3u8")
+
     with patch(
-        "homeassistant.components.camera.Stream.endpoint_url",
-        return_value="http://home.assistant/playlist.m3u8",
-    ) as mock_stream_url:
+        "homeassistant.components.camera.create_stream",
+        return_value=mock_stream,
+    ):
         # Request playlist through WebSocket
         client = await hass_ws_client(hass)
 
@@ -366,7 +372,7 @@ async def test_stream_source(
         msg = await client.receive_json()
 
         # Assert WebSocket response
-        assert mock_stream_url.call_count == 1
+        assert mock_stream.endpoint_url.call_count == 1
         assert msg["id"] == 1
         assert msg["type"] == TYPE_RESULT
         assert msg["success"]