Fix flaky camera stream teardown (#158507)

Co-authored-by: epenet <6771947+epenet@users.noreply.github.com>

tests/components/camera/conftest.py

@@ -148,6 +148,22 @@ def mock_stream_source_fixture() -> Generator[AsyncMock]:
         yield mock_stream_source
 
 
+@pytest.fixture(name="mock_create_stream")
+def mock_create_stream_fixture() -> Generator[Mock]:
+    """Fixture to mock create_stream and prevent real stream threads."""
+    mock_stream = Mock()
+    mock_stream.add_provider = Mock()
+    mock_stream.start = AsyncMock()
+    mock_stream.endpoint_url = Mock(return_value="http://home.assistant/playlist.m3u8")
+    mock_stream.set_update_callback = Mock()
+    mock_stream.available = True
+    with patch(
+        "homeassistant.components.camera.create_stream",
+        return_value=mock_stream,
+    ):
+        yield mock_stream
+
+
 @pytest.fixture
 async def mock_test_webrtc_cameras(hass: HomeAssistant) -> None:
     """Initialize test WebRTC cameras with native RTC support."""

tests/components/camera/test_init.py

@@ -346,20 +346,14 @@ async def test_websocket_stream_no_source(
 
 @pytest.mark.usefixtures("mock_camera", "mock_stream")
 async def test_websocket_camera_stream(
-    hass: HomeAssistant, hass_ws_client: WebSocketGenerator
+    hass: HomeAssistant, hass_ws_client: WebSocketGenerator, mock_create_stream: Mock
 ) -> None:
     """Test camera/stream websocket command."""
     await async_setup_component(hass, "camera", {})
 
-    with (
-        patch(
-            "homeassistant.components.camera.Stream.endpoint_url",
-            return_value="http://home.assistant/playlist.m3u8",
-        ) as mock_stream_view_url,
-        patch(
+    with patch(
         "homeassistant.components.demo.camera.DemoCamera.stream_source",
         return_value="http://example.com",
-        ),
     ):
         # Request playlist through WebSocket
         client = await hass_ws_client(hass)
@@ -369,7 +363,7 @@ async def test_websocket_camera_stream(
         msg = await client.receive_json()
 
         # Assert WebSocket response
-        assert mock_stream_view_url.called
+        assert mock_create_stream.endpoint_url.called
         assert msg["id"] == 6
         assert msg["type"] == TYPE_RESULT
         assert msg["success"]
@@ -505,21 +499,18 @@ async def test_play_stream_service_no_source(hass: HomeAssistant) -> None:
 
 
 @pytest.mark.usefixtures("mock_camera", "mock_stream")
-async def test_handle_play_stream_service(hass: HomeAssistant) -> None:
+async def test_handle_play_stream_service(
+    hass: HomeAssistant, mock_create_stream: Mock
+) -> None:
     """Test camera play_stream service."""
     await async_process_ha_core_config(
         hass,
         {"external_url": "https://example.com"},
     )
     await async_setup_component(hass, "media_player", {})
-    with (
-        patch(
-            "homeassistant.components.camera.Stream.endpoint_url",
-        ) as mock_request_stream,
-        patch(
+    with patch(
         "homeassistant.components.demo.camera.DemoCamera.stream_source",
         return_value="http://example.com",
-        ),
     ):
         # Call service
         await hass.services.async_call(
@@ -533,17 +524,14 @@ async def test_handle_play_stream_service(hass: HomeAssistant) -> None:
         )
         # So long as we request the stream, the rest should be covered
         # by the play_media service tests.
-        assert mock_request_stream.called
+        assert mock_create_stream.endpoint_url.called
 
 
 @pytest.mark.usefixtures("mock_stream")
-async def test_no_preload_stream(hass: HomeAssistant) -> None:
+async def test_no_preload_stream(hass: HomeAssistant, mock_create_stream: Mock) -> None:
     """Test camera preload preference."""
     demo_settings = camera.DynamicStreamSettings()
     with (
-        patch(
-            "homeassistant.components.camera.Stream.endpoint_url",
-        ) as mock_request_stream,
         patch(
             "homeassistant.components.camera.prefs.CameraPreferences.get_dynamic_stream_settings",
             return_value=demo_settings,
@@ -557,15 +545,14 @@ async def test_no_preload_stream(hass: HomeAssistant) -> None:
         await async_setup_component(hass, "camera", {DOMAIN: {"platform": "demo"}})
         hass.bus.async_fire(EVENT_HOMEASSISTANT_STARTED)
         await hass.async_block_till_done()
-        assert not mock_request_stream.called
+        assert not mock_create_stream.endpoint_url.called
 
 
 @pytest.mark.usefixtures("mock_stream")
-async def test_preload_stream(hass: HomeAssistant) -> None:
+async def test_preload_stream(hass: HomeAssistant, mock_create_stream: Mock) -> None:
     """Test camera preload preference."""
     demo_settings = camera.DynamicStreamSettings(preload_stream=True)
     with (
-        patch("homeassistant.components.camera.create_stream") as mock_create_stream,
         patch(
             "homeassistant.components.camera.prefs.CameraPreferences.get_dynamic_stream_settings",
             return_value=demo_settings,
@@ -575,14 +562,13 @@ async def test_preload_stream(hass: HomeAssistant) -> None:
             return_value="http://example.com",
         ),
     ):
-        mock_create_stream.return_value.start = AsyncMock()
         assert await async_setup_component(
             hass, "camera", {DOMAIN: {"platform": "demo"}}
         )
         await hass.async_block_till_done()
         hass.bus.async_fire(EVENT_HOMEASSISTANT_STARTED)
         await hass.async_block_till_done()
-        assert mock_create_stream.called
+        assert mock_create_stream.start.called
 
 
 @pytest.mark.usefixtures("mock_camera")
@@ -694,25 +680,16 @@ async def test_state_streaming(hass: HomeAssistant) -> None:
     assert demo_camera.state == camera.CameraState.STREAMING
 
 
-@pytest.mark.usefixtures("mock_camera", "mock_stream")
+@pytest.mark.usefixtures("mock_camera", "mock_stream", "mock_create_stream")
 async def test_stream_unavailable(
-    hass: HomeAssistant, hass_ws_client: WebSocketGenerator
+    hass: HomeAssistant, hass_ws_client: WebSocketGenerator, mock_create_stream: Mock
 ) -> None:
     """Camera state."""
     await async_setup_component(hass, "camera", {})
 
-    with (
-        patch(
-            "homeassistant.components.camera.Stream.endpoint_url",
-            return_value="http://home.assistant/playlist.m3u8",
-        ),
-        patch(
+    with patch(
         "homeassistant.components.demo.camera.DemoCamera.stream_source",
         return_value="http://example.com",
-        ),
-        patch(
-            "homeassistant.components.camera.Stream.set_update_callback",
-        ) as mock_update_callback,
     ):
         # Request playlist through WebSocket. We just want to create the stream
         # but don't care about the result.
@@ -721,13 +698,11 @@ async def test_stream_unavailable(
             {"id": 10, "type": "camera/stream", "entity_id": "camera.demo_camera"}
         )
         await client.receive_json()
-        assert mock_update_callback.called
+        assert mock_create_stream.set_update_callback.called
 
     # Simulate the stream going unavailable
-    callback = mock_update_callback.call_args.args[0]
-    with patch(
-        "homeassistant.components.camera.Stream.available", new_callable=lambda: False
-    ):
+    callback = mock_create_stream.set_update_callback.call_args.args[0]
+    mock_create_stream.available = False
     callback()
     await hass.async_block_till_done()
 
@@ -736,9 +711,7 @@ async def test_stream_unavailable(
     assert demo_camera.state == STATE_UNAVAILABLE
 
     # Simulate stream becomes available
-    with patch(
-        "homeassistant.components.camera.Stream.available", new_callable=lambda: True
-    ):
+    mock_create_stream.available = True
     callback()
     await hass.async_block_till_done()