chore: support CPython 3.12, update CI jobs

falcon/util/misc.py

@@ -75,7 +75,9 @@
 
 # PERF(kgriffs): Avoid superfluous namespace lookups
 strptime: Callable[[str, str], datetime.datetime] = datetime.datetime.strptime
-utcnow: Callable[[], datetime.datetime] = datetime.datetime.utcnow
+utcnow: Callable[[], datetime.datetime] = functools.partial(
+    datetime.datetime.now, datetime.timezone.utc
+)
 
 
 # NOTE(kgriffs,vytas): This is tested in the PyPy gate but we do not want devs

pyproject.toml

@@ -96,6 +96,8 @@ filterwarnings = [
     "ignore:inspect.getargspec\\(\\) is deprecated:DeprecationWarning",
     "ignore:.cgi. is deprecated and slated for removal:DeprecationWarning",
     "ignore:path is deprecated\\. Use files\\(\\) instead:DeprecationWarning",
+    "ignore:This process \\(.+\\) is multi-threaded",
+    "ignore:There is no current event loop",
 ]
 testpaths = [
     "tests"

tests/test_cookies.py

@@ -1,4 +1,4 @@
-from datetime import datetime, timedelta, tzinfo
+from datetime import datetime, timedelta, timezone, tzinfo
 from http import cookies as http_cookies
 import re
 
@@ -28,6 +28,10 @@ def dst(self, dt):
 GMT_PLUS_ONE = TimezoneGMTPlus1()
 
 
+def utcnow_naive():
+    return datetime.now(timezone.utc).replace(tzinfo=None)
+
+
 class CookieResource:
     def on_get(self, req, resp):
         resp.set_cookie('foo', 'bar', domain='example.com', path='/')
@@ -171,7 +175,7 @@ def test_response_complex_case(client):
     assert cookie.domain is None
     assert cookie.same_site == 'Lax'
 
-    assert cookie.expires < datetime.utcnow()
+    assert cookie.expires < utcnow_naive()
 
     # NOTE(kgriffs): I know accessing a private attr like this is
     # naughty of me, but we just need to sanity-check that the
@@ -193,7 +197,7 @@ def test(cookie, path, domain, samesite='Lax'):
         assert cookie.domain == domain
         assert cookie.path == path
         assert cookie.same_site == samesite
-        assert cookie.expires < datetime.utcnow()
+        assert cookie.expires < utcnow_naive()
 
     test(result.cookies['foo'], path=None, domain=None)
     test(result.cookies['bar'], path='/bar', domain=None)
@@ -231,7 +235,7 @@ def test_set(cookie, value, samesite=None):
     def test_unset(cookie, samesite='Lax'):
         assert cookie.value == ''  # An unset cookie has an empty value
         assert cookie.same_site == samesite
-        assert cookie.expires < datetime.utcnow()
+        assert cookie.expires < utcnow_naive()
 
     test_unset(result_unset.cookies['foo'], samesite='Strict')
     # default: bar is unset with no samesite param, so should go to Lax
@@ -325,7 +329,7 @@ def test_response_unset_cookie(client):
     assert match
 
     expiration = http_date_to_dt(match.group(1), obs_date=True)
-    assert expiration < datetime.utcnow()
+    assert expiration < utcnow_naive()
 
 
 def test_cookie_timezone(client):

tests/test_headers.py

@@ -6,6 +6,8 @@
 import falcon
 from falcon import testing
 from falcon.util.deprecation import DeprecatedWarning
+from falcon.util.misc import utcnow
+
 from _util import create_app  # NOQA
 
 
@@ -31,7 +33,7 @@ def __init__(self, last_modified=None):
         if last_modified is not None:
             self.last_modified = last_modified
         else:
-            self.last_modified = datetime.utcnow()
+            self.last_modified = utcnow()
 
     def _overwrite_headers(self, req, resp):
         resp.content_type = 'x-falcon/peregrine'

tests/test_middleware.py

@@ -10,6 +10,7 @@
 import falcon
 import falcon.errors
 import falcon.testing as testing
+from falcon.util.misc import utcnow
 
 from _util import create_app  # NOQA
 
@@ -36,15 +37,15 @@ def process_request(self, req, resp):
 class RequestTimeMiddleware:
     def process_request(self, req, resp):
         global context
-        context['start_time'] = datetime.utcnow()
+        context['start_time'] = utcnow()
 
     def process_resource(self, req, resp, resource, params):
         global context
-        context['mid_time'] = datetime.utcnow()
+        context['mid_time'] = utcnow()
 
     def process_response(self, req, resp, resource, req_succeeded):
         global context
-        context['end_time'] = datetime.utcnow()
+        context['end_time'] = utcnow()
         context['req_succeeded'] = req_succeeded
 
     async def process_request_async(self, req, resp):

tests/test_utils.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-from datetime import datetime
+from datetime import datetime, timezone
 import functools
 import http
 import itertools
@@ -109,13 +109,12 @@ def old_thing():
         assert msg in str(warn.message)
 
     def test_http_now(self):
-        expected = datetime.utcnow()
+        expected = datetime.now(timezone.utc)
         actual = falcon.http_date_to_dt(falcon.http_now())
 
-        delta = actual - expected
-        delta_sec = abs(delta.days * 86400 + delta.seconds)
+        delta = actual.replace(tzinfo=timezone.utc) - expected
 
-        assert delta_sec <= 1
+        assert delta.total_seconds() <= 1
 
     def test_dt_to_http(self):
         assert (