Upgrade to py12 (#1354)

* Upgrade to py12 compatible aiohttp beta version

* Fix uvloop deprecation warning causing pytest not to run

* Fix test due to asyncio task scheduling race condition

* Fix test_state_in_unknown_class for Python 3.12+ due to PEP 678 changes

* Add Python 3.12 support in GitHub Actions and project configurations

* Add changelog entry

---------

Co-authored-by: Alex Root Junior <jroot.junior@gmail.com>

.github/workflows/tests.yml

@@ -33,6 +33,7 @@ jobs:
           - '3.9'
           - '3.10'
           - '3.11'
+          - '3.12'
           - 'pypy3.8'
           - 'pypy3.9'
 

CHANGES/1354.misc.rst

@@ -0,0 +1 @@
+Introduce Python 3.12 support

aiogram/__init__.py

@@ -15,8 +15,10 @@
 
 with suppress(ImportError):
     import uvloop as _uvloop
+    import asyncio
+
+    asyncio.set_event_loop_policy(_uvloop.EventLoopPolicy())
 
-    _uvloop.install()  # type: ignore[attr-defined,unused-ignore]
 
 F = MagicFilter()
 flags = FlagGenerator()

pyproject.toml

@@ -34,14 +34,15 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Topic :: Software Development :: Libraries :: Application Frameworks",
     "Topic :: Software Development :: Libraries :: Python Modules",
     "Topic :: Communications :: Chat",
 ]
 dependencies = [
     "magic-filter>=1.0.12,<1.1",
-    "aiohttp~=3.8.5",
+    "aiohttp~=3.9.0",
     "pydantic>=2.4.1,<2.6",
     "aiofiles~=23.2.1",
     "certifi>=2023.7.22",
@@ -144,7 +145,7 @@ features = [
 serve = "sphinx-autobuild --watch aiogram/ --watch CHANGELOG.rst --watch README.rst docs/ docs/_build/ {args}"
 
 [tool.hatch.envs.dev]
-python = "3.11"
+python = "3.12"
 features = [
     "dev",
     "fast",
@@ -185,7 +186,7 @@ view-cov = "google-chrome-stable reports/py{matrix:python}/coverage/index.html"
 
 
 [[tool.hatch.envs.test.matrix]]
-python = ["38", "39", "310", "311"]
+python = ["38", "39", "310", "311", "312"]
 
 [tool.ruff]
 line-length = 99

tests/test_fsm/test_state.py

@@ -1,7 +1,10 @@
 import pytest
+import sys
 
 from aiogram.fsm.state import State, StatesGroup, any_state
 
+PY312_OR_GREATER = sys.version_info >= (3, 12)
+
 
 class TestState:
     def test_empty(self):
@@ -72,10 +75,20 @@ def test_filter(self, state, check, result):
         assert state(None, check) is result
 
     def test_state_in_unknown_class(self):
-        with pytest.raises(RuntimeError):
+        if PY312_OR_GREATER:
+            # Python 3.12+ does not wrap __set_name__ exceptions with RuntimeError anymore as part
+            # of PEP 678. See "Other Language Changes" in the changelogs:
+            # https://docs.python.org/3/whatsnew/3.12.html
+            with pytest.raises(ValueError):
 
-            class MyClass:
-                state1 = State()
+                class MyClass:
+                    state1 = State()
+
+        else:
+            with pytest.raises(RuntimeError):
+
+                class MyClass:
+                    state1 = State()
 
 
 class TestStatesGroup:

tests/test_webhook/test_aiohtt_server.py

@@ -181,10 +181,20 @@ def handle_message(msg: Message):
             "aiogram.dispatcher.dispatcher.Dispatcher.silent_call_request",
             new_callable=AsyncMock,
         ) as mocked_silent_call_request:
+            method_called_event = asyncio.Event()
+            mocked_silent_call_request.side_effect = (
+                lambda *args, **kwargs: method_called_event.set()
+            )
+
             handler_event.clear()
             resp = await self.make_reqest(client=client)
             assert resp.status == 200
             await asyncio.wait_for(handler_event.wait(), timeout=1)
+            await asyncio.wait_for(method_called_event.wait(), timeout=1)
+            # Python 3.12 had some changes to asyncio which make it quite a bit faster. But
+            # probably because of that the assert_awaited call is consistently scheduled before the
+            # silent_call_request call - failing the test. So we wait for the method to be called
+            # before asserting if it has been awaited.
             mocked_silent_call_request.assert_awaited()
         result = await resp.json()
         assert not result