Default `hass_config` to contain an empty config (#88515)

* Default hass_config to {}

* Correct type hint

pylint/plugins/hass_enforce_type_hints.py

@@ -109,7 +109,7 @@ _TEST_FIXTURES: dict[str, list[str] | str] = {
     "hass_admin_user": "MockUser",
     "hass_client": "ClientSessionGenerator",
     "hass_client_no_auth": "ClientSessionGenerator",
-    "hass_config": "ConfigType | None",
+    "hass_config": "ConfigType",
     "hass_config_yaml": "str | None",
     "hass_config_yaml_files": "dict[str, str] | None",
     "hass_owner_user": "MockUser",

tests/components/homeassistant/triggers/test_homeassistant.py

@@ -27,7 +27,7 @@ from tests.common import async_mock_service
     ],
 )
 async def test_if_fires_on_hass_start(
-    hass: HomeAssistant, mock_hass_config: None, hass_config: ConfigType | None
+    hass: HomeAssistant, mock_hass_config: None, hass_config: ConfigType
 ) -> None:
     """Test the firing when Home Assistant starts."""
     calls = async_mock_service(hass, "test", "automation")

tests/conftest.py

@@ -920,19 +920,19 @@ async def _mqtt_mock_entry(
 
 
 @pytest.fixture
-def hass_config() -> ConfigType | None:
+def hass_config() -> ConfigType:
     """Fixture to parametrize the content of main configuration using mock_hass_config.
 
     To set a configuration, tests can be marked with:
     @pytest.mark.parametrize("hass_config", [{integration: {...}}])
     Add the `mock_hass_config: None` fixture to the test.
     """
-    return None
+    return {}
 
 
 @pytest.fixture
 def mock_hass_config(
-    hass: HomeAssistant, hass_config: ConfigType | None
+    hass: HomeAssistant, hass_config: ConfigType
 ) -> Generator[None, None, None]:
     """Fixture to mock the content of main configuration.