Fix lg_netcast tests opening sockets (#156459)

Co-authored-by: epenet <6771947+epenet@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

tests/components/lg_netcast/test_device_trigger.py

@@ -1,4 +1,7 @@
-"""The tests for LG NEtcast device triggers."""
+"""The tests for LG Netcast device triggers."""
+
+from collections.abc import Generator
+from unittest.mock import patch
 
 import pytest
 
@@ -19,6 +22,13 @@ from . import ENTITY_ID, UNIQUE_ID, setup_lgnetcast
 from tests.common import MockConfigEntry, async_get_device_automations
 
 
+@pytest.fixture(autouse=True)
+def mock_lg_netcast() -> Generator[None]:
+    """Mock LG Netcast library."""
+    with patch("homeassistant.components.lg_netcast.LgNetCastClient"):
+        yield
+
+
 async def test_get_triggers(
     hass: HomeAssistant, device_registry: dr.DeviceRegistry
 ) -> None:

tests/components/lg_netcast/test_trigger.py

@@ -1,5 +1,6 @@
 """The tests for LG Netcast device triggers."""
 
+from collections.abc import Generator
 from unittest.mock import patch
 
 import pytest
@@ -17,6 +18,13 @@ from . import ENTITY_ID, UNIQUE_ID, setup_lgnetcast
 from tests.common import MockEntity, MockEntityPlatform
 
 
+@pytest.fixture(autouse=True)
+def mock_lg_netcast() -> Generator[None]:
+    """Mock LG Netcast library."""
+    with patch("homeassistant.components.lg_netcast.LgNetCastClient"):
+        yield
+
+
 async def test_lg_netcast_turn_on_trigger_device_id(
     hass: HomeAssistant,
     service_calls: list[ServiceCall],