Improve google calendar test coverage to 97% (#65223)

* Improve google calendar test coverage to 97%

* Remove commented out code.

* Remove unnecessary (flaky) checks for token file persistence

* Remove mock code assertions

* Add debug logging to google calendar integration

* Increase alarm time to polling code to reduce flakes

* Setup every test in their own configuration directory

* Mock out filesystem calls to avoid disk dependencies

Update scope checking code to use Storage object rather than text file matching

* Update tests to check entity states when integration is loaded

* Mock out google service in multiple locations

* Update homeassistant/components/google/__init__.py

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

* Update homeassistant/components/google/__init__.py

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

tests/components/google/conftest.py

@@ -1,10 +1,20 @@
 """Test configuration and mocks for the google integration."""
-from unittest.mock import patch
+from collections.abc import Callable
+from typing import Any, Generator, TypeVar
+from unittest.mock import Mock, patch
 
 import pytest
 
+from homeassistant.components.google import GoogleCalendarService
+
+ApiResult = Callable[[dict[str, Any]], None]
+T = TypeVar("T")
+YieldFixture = Generator[T, None, None]
+
+
+CALENDAR_ID = "qwertyuiopasdfghjklzxcvbnm@import.calendar.google.com"
 TEST_CALENDAR = {
-    "id": "qwertyuiopasdfghjklzxcvbnm@import.calendar.google.com",
+    "id": CALENDAR_ID,
     "etag": '"3584134138943410"',
     "timeZone": "UTC",
     "accessRole": "reader",
@@ -34,3 +44,45 @@ def mock_next_event():
     )
     with patch_google_cal as google_cal_data:
         yield google_cal_data
+
+
+@pytest.fixture
+def mock_events_list(
+    google_service: GoogleCalendarService,
+) -> Callable[[dict[str, Any]], None]:
+    """Fixture to construct a fake event list API response."""
+
+    def _put_result(response: dict[str, Any]) -> None:
+        google_service.return_value.get.return_value.events.return_value.list.return_value.execute.return_value = (
+            response
+        )
+        return
+
+    return _put_result
+
+
+@pytest.fixture
+def mock_calendars_list(
+    google_service: GoogleCalendarService,
+) -> ApiResult:
+    """Fixture to construct a fake calendar list API response."""
+
+    def _put_result(response: dict[str, Any]) -> None:
+        google_service.return_value.get.return_value.calendarList.return_value.list.return_value.execute.return_value = (
+            response
+        )
+        return
+
+    return _put_result
+
+
+@pytest.fixture
+def mock_insert_event(
+    google_service: GoogleCalendarService,
+) -> Mock:
+    """Fixture to create a mock to capture new events added to the API."""
+    insert_mock = Mock()
+    google_service.return_value.get.return_value.events.return_value.insert = (
+        insert_mock
+    )
+    return insert_mock