upgrade App Engine app runtime to python 3.12

https://cloud.google.com/appengine/docs/standard/reference/app-yaml?tab=python#runtime

https://cloud.google.com/appengine/docs/flexible/python/runtime#recommended_gunicorn_configuration

.circleci/config.yml

@@ -15,7 +15,7 @@ parameters:
 jobs:
   build:
     docker:
-      - image: cimg/python:3.11
+      - image: cimg/python:3.12
 
     steps:
       - checkout

app.yaml

@@ -2,7 +2,7 @@
 
 # application: bridgy-federated
 
-runtime: python311
+runtime: python312
 
 # default_expiration: 1h
 

atproto_hub.yaml

@@ -9,7 +9,7 @@ env: flex
 runtime: python
 runtime_config:
     operating_system: ubuntu22
-    runtime_version: "3.11"
+    runtime_version: "3.12"
 
 resources:
   cpu: 1

router.yaml

@@ -9,7 +9,7 @@ env: flex
 runtime: python
 runtime_config:
     operating_system: ubuntu22
-    runtime_version: "3.11"
+    runtime_version: "3.12"
 
 resources:
   cpu: 6

tests/test_activitypub.py

@@ -1,7 +1,7 @@
 """Unit tests for activitypub.py."""
 from base64 import b64encode
 import copy
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, UTC
 from hashlib import sha256
 import logging
 from unittest import skip
@@ -1865,7 +1865,8 @@ def test_followers_collection_protocol_bot_user(self, *_):
     @patch('models.PAGE_SIZE', 1)
     def test_followers_collection_page(self, *_):
         self.store_followers()
-        before = (datetime.utcnow() + timedelta(seconds=1)).isoformat()
+        before = (datetime.now(UTC) + timedelta(seconds=1)
+                  ).replace(tzinfo=None).isoformat()
         next = Follower.query(Follower.from_ == ActivityPub(id='http://baz').key,
                               Follower.to == self.user.key,
                               ).get().updated.isoformat()
@@ -1886,7 +1887,7 @@ def test_followers_collection_page_protocol_bot_user(self, *_):
         self.user = self.make_user('bsky.brid.gy', cls=Web, ap_subdomain='bsky')
         self.store_followers()
 
-        before = (datetime.utcnow() + timedelta(seconds=1)).isoformat()
+        before = (datetime.now(UTC) + timedelta(seconds=1)).isoformat()
         resp = self.client.get(f'/bsky.brid.gy/followers?before={before}',
                                base_url='https://bsky.brid.gy')
         self.assertEqual(200, resp.status_code)
@@ -1991,7 +1992,7 @@ def test_following_collection_page_protocol_bot_user(self, *_):
         self.user = self.make_user('bsky.brid.gy', cls=Web, ap_subdomain='bsky')
         self.store_following()
 
-        before = (datetime.utcnow() + timedelta(seconds=1)).isoformat()
+        before = (datetime.now(UTC) + timedelta(seconds=1)).isoformat()
         resp = self.client.get(f'/bsky.brid.gy/following?before={before}',
                                base_url='https://bsky.brid.gy')
         self.assertEqual(200, resp.status_code)

tests/test_atproto_firehose.py

@@ -1,6 +1,6 @@
 """Unit tests for atproto_firehose.py."""
 import copy
-from datetime import datetime, timedelta, timezone
+from datetime import datetime, timedelta, timezone, UTC
 from unittest import skip
 from unittest.mock import patch
 
@@ -402,7 +402,7 @@ def test_load_dids_updated_atproto_user(self):
 
         self.store_object(id='did:plc:eve', raw=DID_DOC)
         eve = self.make_user('did:plc:eve', cls=ATProto)
-        util.now = datetime.utcnow
+        util.now = lambda: datetime.now(UTC).replace(tzinfo=None)
         self.assertLess(eve.created, util.now())
 
         self.subscribe()

tests/testutil.py

@@ -258,6 +258,7 @@ class TestCase(unittest.TestCase, testutil.Asserts):
 
     def setUp(self):
         super().setUp()
+        testutil.suppress_warnings()
 
         appengine_info.APP_ID = 'my-app'
         appengine_info.LOCAL_SERVER = False