Stop updating google_calendars.yaml if it does not already exist (#72340)

* Stop updating google_calendars.yaml if it does not already exist

* Add additional test coverage to make CI pass

* Add test for no updates to google_calendar.yaml

* Add parameter to test for expecting write calls

* Missing call argument

* Remove conditional and replace with inline assert

homeassistant/components/google/__init__.py

@@ -300,6 +300,7 @@ async def async_setup_services(
     calendars = await hass.async_add_executor_job(
         load_config, hass.config.path(YAML_DEVICES)
     )
+    calendars_file_lock = asyncio.Lock()
 
     async def _found_calendar(calendar_item: Calendar) -> None:
         calendar = get_calendar_info(
@@ -307,15 +308,19 @@ async def async_setup_services(
             calendar_item.dict(exclude_unset=True),
         )
         calendar_id = calendar_item.id
-        # Populate the yaml file with all discovered calendars
-        if calendar_id not in calendars:
-            calendars[calendar_id] = calendar
-            await hass.async_add_executor_job(
-                update_config, hass.config.path(YAML_DEVICES), calendar
-            )
-        else:
-            # Prefer entity/name information from yaml, overriding api
-            calendar = calendars[calendar_id]
+        # If the google_calendars.yaml file already exists, populate it for
+        # backwards compatibility, but otherwise do not create it if it does
+        # not exist.
+        if calendars:
+            if calendar_id not in calendars:
+                calendars[calendar_id] = calendar
+                async with calendars_file_lock:
+                    await hass.async_add_executor_job(
+                        update_config, hass.config.path(YAML_DEVICES), calendar
+                    )
+            else:
+                # Prefer entity/name information from yaml, overriding api
+                calendar = calendars[calendar_id]
         async_dispatcher_send(hass, DISCOVER_CALENDAR, calendar)
 
     created_calendars = set()

tests/components/google/conftest.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 from collections.abc import Awaitable, Callable
 import datetime
 from typing import Any, Generator, TypeVar
-from unittest.mock import mock_open, patch
+from unittest.mock import Mock, mock_open, patch
 
 from aiohttp.client_exceptions import ClientError
 from gcal_sync.auth import API_BASE_URL
@@ -104,11 +104,11 @@ def calendars_config(calendars_config_entity: dict[str, Any]) -> list[dict[str,
 def mock_calendars_yaml(
     hass: HomeAssistant,
     calendars_config: list[dict[str, Any]],
-) -> None:
+) -> Generator[Mock, None, None]:
     """Fixture that prepares the google_calendars.yaml mocks."""
     mocked_open_function = mock_open(read_data=yaml.dump(calendars_config))
     with patch("homeassistant.components.google.open", mocked_open_function):
-        yield
+        yield mocked_open_function
 
 
 class FakeStorage:
@@ -170,10 +170,17 @@ def config_entry_token_expiry(token_expiry: datetime.datetime) -> float:
     return token_expiry.timestamp()
 
 
+@pytest.fixture
+def config_entry_options() -> dict[str, Any] | None:
+    """Fixture to set initial config entry options."""
+    return None
+
+
 @pytest.fixture
 def config_entry(
     token_scopes: list[str],
     config_entry_token_expiry: float,
+    config_entry_options: dict[str, Any] | None,
 ) -> MockConfigEntry:
     """Fixture to create a config entry for the integration."""
     return MockConfigEntry(
@@ -188,6 +195,7 @@ def config_entry(
                 "expires_at": config_entry_token_expiry,
             },
         },
+        options=config_entry_options,
     )
 
 

tests/components/google/test_calendar.py

@@ -572,14 +572,16 @@ async def test_opaque_event(
     assert (len(events) > 0) == expect_visible_event
 
 
+@pytest.mark.parametrize("mock_test_setup", [None])
 async def test_scan_calendar_error(
     hass,
     component_setup,
     test_api_calendar,
     mock_calendars_list,
+    config_entry,
 ):
     """Test that the calendar update handles a server error."""
-
+    config_entry.add_to_hass(hass)
     mock_calendars_list({}, exc=ClientError())
     assert await component_setup()
 

tests/components/google/test_init.py

@@ -6,7 +6,7 @@ import datetime
 import http
 import time
 from typing import Any
-from unittest.mock import patch
+from unittest.mock import Mock, patch
 
 import pytest
 
@@ -19,6 +19,7 @@ from homeassistant.components.google import (
     SERVICE_ADD_EVENT,
     SERVICE_SCAN_CALENDARS,
 )
+from homeassistant.components.google.const import CONF_CALENDAR_ACCESS
 from homeassistant.config_entries import ConfigEntryState
 from homeassistant.const import STATE_OFF
 from homeassistant.core import HomeAssistant, State
@@ -229,7 +230,10 @@ async def test_found_calendar_from_api(
     assert not hass.states.get(TEST_YAML_ENTITY)
 
 
-@pytest.mark.parametrize("calendars_config,google_config", [([], {})])
+@pytest.mark.parametrize(
+    "calendars_config,google_config,config_entry_options",
+    [([], {}, {CONF_CALENDAR_ACCESS: "read_write"})],
+)
 async def test_load_application_credentials(
     hass: HomeAssistant,
     component_setup: ComponentSetup,
@@ -604,3 +608,48 @@ async def test_expired_token_requires_reauth(
     flows = hass.config_entries.flow.async_progress()
     assert len(flows) == 1
     assert flows[0]["step_id"] == "reauth_confirm"
+
+
+@pytest.mark.parametrize(
+    "calendars_config,expect_write_calls",
+    [
+        (
+            [
+                {
+                    "cal_id": "ignored",
+                    "entities": {"device_id": "existing", "name": "existing"},
+                }
+            ],
+            True,
+        ),
+        ([], False),
+    ],
+    ids=["has_yaml", "no_yaml"],
+)
+async def test_calendar_yaml_update(
+    hass: HomeAssistant,
+    component_setup: ComponentSetup,
+    mock_calendars_yaml: Mock,
+    mock_calendars_list: ApiResult,
+    test_api_calendar: dict[str, Any],
+    mock_events_list: ApiResult,
+    setup_config_entry: MockConfigEntry,
+    calendars_config: dict[str, Any],
+    expect_write_calls: bool,
+) -> None:
+    """Test updating the yaml file with a new calendar."""
+
+    mock_calendars_list({"items": [test_api_calendar]})
+    mock_events_list({})
+    assert await component_setup()
+
+    mock_calendars_yaml().read.assert_called()
+    mock_calendars_yaml().write.called is expect_write_calls
+
+    state = hass.states.get(TEST_API_ENTITY)
+    assert state
+    assert state.name == TEST_API_ENTITY_NAME
+    assert state.state == STATE_OFF
+
+    # No yaml config loaded that overwrites the entity name
+    assert not hass.states.get(TEST_YAML_ENTITY)