Fix warning: asyncio.events._event_loop_policy was modified by test_asyncio (GH-31253)

7 files changed, 30 insertions, 4 deletions

diff --git a/Lib/test/test_asyncio/test_futures2.py b/Lib/test/test_asyncio/test_futures2.py
index 57d2419..60b5885 100644
--- a/Lib/test/test_asyncio/test_futures2.py
+++ b/Lib/test/test_asyncio/test_futures2.py
@@ -3,6 +3,10 @@ import asyncio
 import unittest
 
 
+def tearDownModule():
+    asyncio.set_event_loop_policy(None)
+
+
 class FutureTests(unittest.IsolatedAsyncioTestCase):
     async def test_recursive_repr_for_pending_tasks(self):
         # The call crashes if the guard for recursive call
diff --git a/Lib/test/test_asyncio/test_protocols.py b/Lib/test/test_asyncio/test_protocols.py
index d8cde6d..0f23263 100644
--- a/Lib/test/test_asyncio/test_protocols.py
+++ b/Lib/test/test_asyncio/test_protocols.py
@@ -4,6 +4,12 @@ from unittest import mock
 import asyncio
 
 
+def tearDownModule():
+    # not needed for the test file but added for uniformness with all other
+    # asyncio test files for the sake of unified cleanup
+    asyncio.set_event_loop_policy(None)
+
+
 class ProtocolsAbsTests(unittest.TestCase):
 
     def test_base_protocol(self):
diff --git a/Lib/test/test_asyncio/test_runners.py b/Lib/test/test_asyncio/test_runners.py
index 5c06a1a..1122736 100644
--- a/Lib/test/test_asyncio/test_runners.py
+++ b/Lib/test/test_asyncio/test_runners.py
@@ -5,6 +5,10 @@ from unittest import mock
 from test.test_asyncio import utils as test_utils
 
 
+def tearDownModule():
+    asyncio.set_event_loop_policy(None)
+
+
 class TestPolicy(asyncio.AbstractEventLoopPolicy):
 
     def __init__(self, loop_factory):
diff --git a/Lib/test/test_asyncio/test_sock_lowlevel.py b/Lib/test/test_asyncio/test_sock_lowlevel.py
index 448d835..14001a4 100644
--- a/Lib/test/test_asyncio/test_sock_lowlevel.py
+++ b/Lib/test/test_asyncio/test_sock_lowlevel.py
@@ -10,6 +10,10 @@ from test import support
 from test.support import socket_helper
 
 
+def tearDownModule():
+    asyncio.set_event_loop_policy(None)
+
+
 class MyProto(asyncio.Protocol):
     connected = None
     done = None
diff --git a/Lib/test/test_asyncio/test_transports.py b/Lib/test/test_asyncio/test_transports.py
index df44855..bbdb218 100644
--- a/Lib/test/test_asyncio/test_transports.py
+++ b/Lib/test/test_asyncio/test_transports.py
@@ -7,6 +7,12 @@ import asyncio
 from asyncio import transports
 
 
+def tearDownModule():
+    # not needed for the test file but added for uniformness with all other
+    # asyncio test files for the sake of unified cleanup
+    asyncio.set_event_loop_policy(None)
+
+
 class TransportTests(unittest.TestCase):
 
     def test_ctor_extra_is_none(self):
diff --git a/Lib/test/test_asyncio/test_unix_events.py b/Lib/test/test_asyncio/test_unix_events.py
index c342285..2f68459 100644
--- a/Lib/test/test_asyncio/test_unix_events.py
+++ b/Lib/test/test_asyncio/test_unix_events.py
@@ -26,6 +26,10 @@ from asyncio import unix_events
 from test.test_asyncio import utils as test_utils
 
 
+def tearDownModule():
+    asyncio.set_event_loop_policy(None)
+
+
 MOCK_ANY = mock.ANY
 
 
@@ -39,10 +43,6 @@ def SIGNAL(signum):
     return 32768 - signum
 
 
-def tearDownModule():
-    asyncio.set_event_loop_policy(None)
-
-
 def close_pipe_transport(transport):
     # Don't call transport.close() because the event loop and the selector
     # are mocked
diff --git a/Misc/NEWS.d/next/Tests/2022-02-10-14-33-47.bpo-46708.avLfCb.rst b/Misc/NEWS.d/next/Tests/2022-02-10-14-33-47.bpo-46708.avLfCb.rst
new file mode 100644
index 0000000..119107a
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2022-02-10-14-33-47.bpo-46708.avLfCb.rst
@@ -0,0 +1,2 @@
+Prevent default asyncio event loop policy modification warning after
+``test_asyncio`` execution.