Use error introduced in #154579 in google_photos integration (#166656)

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

homeassistant/components/google_photos/__init__.py

@@ -33,11 +33,18 @@ async def async_setup_entry(
     hass: HomeAssistant, entry: GooglePhotosConfigEntry
 ) -> bool:
     """Set up Google Photos from a config entry."""
-    implementation = (
-        await config_entry_oauth2_flow.async_get_config_entry_implementation(
-            hass, entry
+    try:
+        implementation = (
+            await config_entry_oauth2_flow.async_get_config_entry_implementation(
+                hass, entry
+            )
         )
-    )
+    except config_entry_oauth2_flow.ImplementationUnavailableError as err:
+        raise ConfigEntryNotReady(
+            translation_domain=DOMAIN,
+            translation_key="oauth2_implementation_unavailable",
+        ) from err
+
     web_session = async_get_clientsession(hass)
     oauth_session = config_entry_oauth2_flow.OAuth2Session(hass, entry, implementation)
     auth = api.AsyncConfigEntryAuth(web_session, oauth_session)

homeassistant/components/google_photos/strings.json

@@ -68,6 +68,9 @@
     "no_access_to_path": {
       "message": "Cannot read {filename}, no access to path; `allowlist_external_dirs` may need to be adjusted in `configuration.yaml`"
     },
+    "oauth2_implementation_unavailable": {
+      "message": "[%key:common::exceptions::oauth2_implementation_unavailable::message%]"
+    },
     "upload_error": {
       "message": "Failed to upload content: {message}"
     }

tests/components/google_photos/test_init.py

@@ -2,6 +2,7 @@
 
 import http
 import time
+from unittest.mock import patch
 
 from aiohttp import ClientError
 from google_photos_library_api.exceptions import GooglePhotosApiError
@@ -10,6 +11,7 @@ import pytest
 from homeassistant.components.google_photos.const import OAUTH2_TOKEN
 from homeassistant.config_entries import ConfigEntryState
 from homeassistant.core import HomeAssistant
+from homeassistant.helpers import config_entry_oauth2_flow
 
 from tests.common import MockConfigEntry
 from tests.test_util.aiohttp import AiohttpClientMocker
@@ -118,3 +120,19 @@ async def test_coordinator_init_failure(
 ) -> None:
     """Test init failure to load albums."""
     assert config_entry.state is ConfigEntryState.SETUP_RETRY
+
+
+async def test_setup_entry_implementation_unavailable(
+    hass: HomeAssistant,
+    config_entry: MockConfigEntry,
+) -> None:
+    """Test setup entry when implementation is unavailable."""
+    with patch(
+        "homeassistant.helpers.config_entry_oauth2_flow.async_get_config_entry_implementation",
+        side_effect=config_entry_oauth2_flow.ImplementationUnavailableError,
+    ):
+        config_entry.add_to_hass(hass)
+        await hass.config_entries.async_setup(config_entry.entry_id)
+        await hass.async_block_till_done()
+
+    assert config_entry.state is ConfigEntryState.SETUP_RETRY