[3.10] gh-93453: Only emit deprecation warning in asyncio.get_event_loop when a new event loop is created (#100059)

It no longer emits a deprecation warning if the current event loop was set.

(cherry picked from commit 3fae04b10e2655a20a3aadb5e0d63e87206d0c67)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>

1 files changed, 8 insertions, 16 deletions

diff --git a/Lib/test/test_asyncio/test_streams.py b/Lib/test/test_asyncio/test_streams.py
index 44fcd6589c..994041c10f 100644
--- a/Lib/test/test_asyncio/test_streams.py
+++ b/Lib/test/test_asyncio/test_streams.py
@@ -747,10 +747,8 @@ os.close(fd)
         self.assertEqual(data, b'data')
 
     def test_streamreader_constructor_without_loop(self):
-        with self.assertWarns(DeprecationWarning) as cm:
-            with self.assertRaisesRegex(RuntimeError, 'There is no current event loop'):
-                asyncio.StreamReader()
-        self.assertEqual(cm.warnings[0].filename, __file__)
+        with self.assertRaisesRegex(RuntimeError, 'no current event loop'):
+            asyncio.StreamReader()
 
     def test_streamreader_constructor_use_running_loop(self):
         # asyncio issue #184: Ensure that StreamReaderProtocol constructor
@@ -764,21 +762,17 @@ os.close(fd)
     def test_streamreader_constructor_use_global_loop(self):
         # asyncio issue #184: Ensure that StreamReaderProtocol constructor
         # retrieves the current loop if the loop parameter is not set
-        # Deprecated in 3.10
+        # Deprecated in 3.10, undeprecated in 3.11.1
         self.addCleanup(asyncio.set_event_loop, None)
         asyncio.set_event_loop(self.loop)
-        with self.assertWarns(DeprecationWarning) as cm:
-            reader = asyncio.StreamReader()
-        self.assertEqual(cm.warnings[0].filename, __file__)
+        reader = asyncio.StreamReader()
         self.assertIs(reader._loop, self.loop)
 
 
     def test_streamreaderprotocol_constructor_without_loop(self):
         reader = mock.Mock()
-        with self.assertWarns(DeprecationWarning) as cm:
-            with self.assertRaisesRegex(RuntimeError, 'There is no current event loop'):
-                asyncio.StreamReaderProtocol(reader)
-        self.assertEqual(cm.warnings[0].filename, __file__)
+        with self.assertRaisesRegex(RuntimeError, 'no current event loop'):
+            asyncio.StreamReaderProtocol(reader)
 
     def test_streamreaderprotocol_constructor_use_running_loop(self):
         # asyncio issue #184: Ensure that StreamReaderProtocol constructor
@@ -792,13 +786,11 @@ os.close(fd)
     def test_streamreaderprotocol_constructor_use_global_loop(self):
         # asyncio issue #184: Ensure that StreamReaderProtocol constructor
         # retrieves the current loop if the loop parameter is not set
-        # Deprecated in 3.10
+        # Deprecated in 3.10, undeprecated in 3.11.1
         self.addCleanup(asyncio.set_event_loop, None)
         asyncio.set_event_loop(self.loop)
         reader = mock.Mock()
-        with self.assertWarns(DeprecationWarning) as cm:
-            protocol = asyncio.StreamReaderProtocol(reader)
-        self.assertEqual(cm.warnings[0].filename, __file__)
+        protocol = asyncio.StreamReaderProtocol(reader)
         self.assertIs(protocol._loop, self.loop)
 
     def test_multiple_drain(self):