tests: handle Python 3.14 DefaultEventLoopPolicy deprecation warnings

Author: joao-faria-dev

tests/markers/test_class_scope.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import asyncio
+import sys
 from textwrap import dedent
 
 import pytest
@@ -143,8 +144,15 @@ async def test_does_not_use_custom_event_loop_policy():
             """
         )
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=2)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=2, warnings=3)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=2)
 
 
 def test_asyncio_mark_respects_parametrized_loop_policies(
@@ -175,8 +183,15 @@ async def test_parametrized_loop(self, request):
             """
         )
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=2)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=2, warnings=2)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=2)
 
 
 def test_asyncio_mark_provides_class_scoped_loop_to_fixtures(

tests/markers/test_function_scope.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import sys
 from textwrap import dedent
 
 from pytest import Pytester
@@ -119,8 +120,15 @@ async def test_uses_custom_event_loop_policy():
             """
         ),
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=1)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=1, warnings=2)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=1)
 
 
 def test_asyncio_mark_respects_parametrized_loop_policies(
@@ -157,8 +165,15 @@ async def test_parametrized_loop():
             """
         )
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=2)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=2, warnings=3)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=2)
 
 
 def test_asyncio_mark_provides_function_scoped_loop_to_fixtures(

tests/markers/test_module_scope.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import sys
 from textwrap import dedent
 
 from pytest import Pytester
@@ -87,8 +88,15 @@ async def test_does_not_use_custom_event_loop_policy():
             """
         ),
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=2)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=2, warnings=3)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=2)
 
 
 def test_asyncio_mark_respects_parametrized_loop_policies(
@@ -119,8 +127,15 @@ async def test_parametrized_loop():
             """
         )
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=2)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=2, warnings=2)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=2)
 
 
 def test_asyncio_mark_provides_module_scoped_loop_to_fixtures(

tests/markers/test_package_scope.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import sys
 from textwrap import dedent
 
 from pytest import Pytester
@@ -127,8 +128,15 @@ async def test_also_uses_custom_event_loop_policy():
             """
         ),
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=2)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=2, warnings=3)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=2)
 
 
 def test_asyncio_mark_respects_parametrized_loop_policies(
@@ -160,8 +168,15 @@ async def test_parametrized_loop():
             """
         ),
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=2)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=2, warnings=2)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=2)
 
 
 def test_asyncio_mark_provides_package_scoped_loop_to_fixtures(

tests/markers/test_session_scope.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import sys
 from textwrap import dedent
 
 from pytest import Pytester
@@ -128,8 +129,15 @@ async def test_also_uses_custom_event_loop_policy():
             """
         ),
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=2)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=2, warnings=3)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=2)
 
 
 def test_asyncio_mark_respects_parametrized_loop_policies(
@@ -161,8 +169,15 @@ async def test_parametrized_loop():
             """
         ),
     )
-    result = pytester.runpytest("--asyncio-mode=strict")
-    result.assert_outcomes(passed=2)
+    pytest_args = ["--asyncio-mode=strict"]
+    if sys.version_info >= (3, 14):
+        pytest_args.extend(["-W", "default"])
+    result = pytester.runpytest(*pytest_args)
+    if sys.version_info >= (3, 14):
+        result.assert_outcomes(passed=2, warnings=2)
+        result.stdout.fnmatch_lines("*DefaultEventLoopPolicy*")
+    else:
+        result.assert_outcomes(passed=2)
 
 
 def test_asyncio_mark_provides_session_scoped_loop_to_fixtures(