Add unique id for todoist calendar entity (#75674)

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

homeassistant/components/todoist/calendar.py

@@ -296,6 +296,7 @@ class TodoistProjectEntity(CalendarEntity):
         )
         self._cal_data = {}
         self._name = data[CONF_NAME]
+        self._attr_unique_id = data.get(CONF_ID)
 
     @property
     def event(self) -> CalendarEvent:

tests/components/todoist/test_calendar.py

@@ -1,8 +1,15 @@
 """Unit tests for the Todoist calendar platform."""
 from datetime import datetime
+from typing import Any
+from unittest.mock import Mock, patch
 
-from homeassistant.components.todoist.calendar import _parse_due_date
+import pytest
+
+from homeassistant import setup
+from homeassistant.components.todoist.calendar import DOMAIN, _parse_due_date
 from homeassistant.components.todoist.types import DueDate
+from homeassistant.const import CONF_TOKEN
+from homeassistant.helpers import entity_registry
 from homeassistant.util import dt
 
 
@@ -42,3 +49,61 @@ def test_parse_due_date_without_timezone_uses_offset():
     }
     actual = _parse_due_date(data, timezone_offset=-8)
     assert datetime(2022, 2, 2, 22, 0, 0, tzinfo=dt.UTC) == actual
+
+
+@pytest.fixture(name="state")
+def mock_state() -> dict[str, Any]:
+    """Mock the api state."""
+    return {
+        "collaborators": [],
+        "labels": [{"name": "label1", "id": 1}],
+        "projects": [{"id": 12345, "name": "Name"}],
+    }
+
+
+@patch("homeassistant.components.todoist.calendar.TodoistAPI")
+async def test_calendar_entity_unique_id(todoist_api, hass, state):
+    """Test unique id is set to project id."""
+    api = Mock(state=state)
+    todoist_api.return_value = api
+    assert await setup.async_setup_component(
+        hass,
+        "calendar",
+        {
+            "calendar": {
+                "platform": DOMAIN,
+                CONF_TOKEN: "token",
+            }
+        },
+    )
+    await hass.async_block_till_done()
+
+    registry = entity_registry.async_get(hass)
+    entity = registry.async_get("calendar.name")
+    assert 12345 == entity.unique_id
+
+
+@patch("homeassistant.components.todoist.calendar.TodoistAPI")
+async def test_calendar_custom_project_unique_id(todoist_api, hass, state):
+    """Test unique id is None for any custom projects."""
+    api = Mock(state=state)
+    todoist_api.return_value = api
+    assert await setup.async_setup_component(
+        hass,
+        "calendar",
+        {
+            "calendar": {
+                "platform": DOMAIN,
+                CONF_TOKEN: "token",
+                "custom_projects": [{"name": "All projects"}],
+            }
+        },
+    )
+    await hass.async_block_till_done()
+
+    registry = entity_registry.async_get(hass)
+    entity = registry.async_get("calendar.all_projects")
+    assert entity is None
+
+    state = hass.states.get("calendar.all_projects")
+    assert state.state == "off"