Test for, and suppress, additional get_event_loop() DeprecationWarnings

.github/workflows/main.yml

@@ -62,7 +62,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu, windows]
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.8', '3.9', '3.10.8', '3.10', '3.11', '3.12']
 
     steps:
     - uses: actions/checkout@v4

pytest_asyncio/plugin.py

@@ -673,7 +673,9 @@ def _temporary_event_loop_policy(policy: AbstractEventLoopPolicy) -> Iterator[No
         # subsequent tests from side-effects. We close this loop before restoring
         # the old loop to avoid ResourceWarnings.
         try:
-            asyncio.get_event_loop().close()
+            with warnings.catch_warnings():
+                warnings.simplefilter("ignore", DeprecationWarning)
+                asyncio.get_event_loop().close()
         except RuntimeError:
             pass
         asyncio.set_event_loop(old_loop)
@@ -891,7 +893,9 @@ def wrap_in_sync(
     @functools.wraps(func)
     def inner(*args, **kwargs):
         coro = func(*args, **kwargs)
-        _loop = asyncio.get_event_loop()
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+            _loop = asyncio.get_event_loop()
         task = asyncio.ensure_future(coro, loop=_loop)
         try:
             _loop.run_until_complete(task)

tests/async_fixtures/test_async_fixtures_with_finalizer.py

@@ -1,5 +1,6 @@
 import asyncio
 import functools
+import warnings
 
 import pytest
 
@@ -33,7 +34,11 @@ async def port_afinalizer():
             # RuntimeError is raised if task is created on a different loop
             await finalizer
 
-        asyncio.get_event_loop().run_until_complete(port_afinalizer())
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+            loop = asyncio.get_event_loop()
+
+        loop.run_until_complete(port_afinalizer())
 
     worker = asyncio.ensure_future(asyncio.sleep(0.2))
     request.addfinalizer(functools.partial(port_finalizer, worker))

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.14.0
-envlist = py38, py39, py310, py311, py312, pytest-min, docs
+envlist = py38, py39, py3108, py310, py311, py312, pytest-min, docs
 isolated_build = true
 passenv =
     CI
@@ -25,6 +25,14 @@ commands = make test
 allowlist_externals =
     make
 
+[testenv: py3108]
+# Python 3.10.8 is the most recent version that triggers
+# https://github.com/pytest-dev/pytest-asyncio/issues/757.
+#
+# We need to set basepython explicitly here because if we just added "py3109" to
+# envlist, tox would interpret that as "any py310".
+basepython = python3.10.8
+
 [testenv:docs]
 extras = docs
 deps =
@@ -39,6 +47,7 @@ allowlist_externals =
 python =
     3.8: py38, pytest-min
     3.9: py39
+    3.10.9: py3109
     3.10: py310
     3.11: py311
     3.12: py312