Add Google tasks integration, with initial read-only To-do list (#102629)

* Add Google Tasks integration

* Update tests and unique id

* Revert devcontainer change

* Increase test coverage

* Apply suggestions from code review

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

* Remove ternary

* Fix JSON

---------

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

tests/components/google_tasks/test_init.py

@@ -0,0 +1,99 @@
+"""Tests for Google Tasks."""
+from collections.abc import Awaitable, Callable
+import http
+import time
+
+import pytest
+
+from homeassistant.components.google_tasks import DOMAIN
+from homeassistant.components.google_tasks.const import OAUTH2_TOKEN
+from homeassistant.config_entries import ConfigEntryState
+from homeassistant.core import HomeAssistant
+
+from tests.common import MockConfigEntry
+from tests.test_util.aiohttp import AiohttpClientMocker
+
+
+async def test_setup(
+    hass: HomeAssistant,
+    integration_setup: Callable[[], Awaitable[bool]],
+    config_entry: MockConfigEntry,
+    setup_credentials: None,
+) -> None:
+    """Test successful setup and unload."""
+    assert config_entry.state is ConfigEntryState.NOT_LOADED
+
+    await integration_setup()
+    assert config_entry.state is ConfigEntryState.LOADED
+
+    await hass.config_entries.async_unload(config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert config_entry.state == ConfigEntryState.NOT_LOADED
+    assert not hass.services.async_services().get(DOMAIN)
+
+
+@pytest.mark.parametrize("expires_at", [time.time() - 3600], ids=["expired"])
+async def test_expired_token_refresh_success(
+    hass: HomeAssistant,
+    integration_setup: Callable[[], Awaitable[bool]],
+    aioclient_mock: AiohttpClientMocker,
+    config_entry: MockConfigEntry,
+    setup_credentials: None,
+) -> None:
+    """Test expired token is refreshed."""
+
+    aioclient_mock.clear_requests()
+    aioclient_mock.post(
+        OAUTH2_TOKEN,
+        json={
+            "access_token": "updated-access-token",
+            "refresh_token": "updated-refresh-token",
+            "expires_at": time.time() + 3600,
+            "expires_in": 3600,
+        },
+    )
+
+    await integration_setup()
+
+    assert config_entry.state is ConfigEntryState.LOADED
+    assert config_entry.data["token"]["access_token"] == "updated-access-token"
+    assert config_entry.data["token"]["expires_in"] == 3600
+
+
+@pytest.mark.parametrize(
+    ("expires_at", "status", "expected_state"),
+    [
+        (
+            time.time() - 3600,
+            http.HTTPStatus.UNAUTHORIZED,
+            ConfigEntryState.SETUP_RETRY,  # Will trigger reauth in the future
+        ),
+        (
+            time.time() - 3600,
+            http.HTTPStatus.INTERNAL_SERVER_ERROR,
+            ConfigEntryState.SETUP_RETRY,
+        ),
+    ],
+    ids=["unauthorized", "internal_server_error"],
+)
+async def test_expired_token_refresh_failure(
+    hass: HomeAssistant,
+    integration_setup: Callable[[], Awaitable[bool]],
+    aioclient_mock: AiohttpClientMocker,
+    config_entry: MockConfigEntry,
+    setup_credentials: None,
+    status: http.HTTPStatus,
+    expected_state: ConfigEntryState,
+) -> None:
+    """Test failure while refreshing token with a transient error."""
+
+    aioclient_mock.clear_requests()
+    aioclient_mock.post(
+        OAUTH2_TOKEN,
+        status=status,
+    )
+
+    await integration_setup()
+
+    assert config_entry.state is expected_state