bpo-46469: Make asyncio generic classes return GenericAlias (GH-30777)

* bpo-46469: Make asyncio generic classes return GenericAlias

* 📜🤖 Added by blurb_it.

* Update Misc/NEWS.d/next/Library/2022-01-22-05-05-08.bpo-46469.plUab5.rst

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/Lib/test/test_asyncio/test_tasks.py b/Lib/test/test_asyncio/test_tasks.py
index 832ff80f11..8c4dceacde 100644
--- a/Lib/test/test_asyncio/test_tasks.py
+++ b/Lib/test/test_asyncio/test_tasks.py
@@ -11,10 +11,10 @@ import re
 import sys
 import textwrap
 import traceback
-import types
 import unittest
 import weakref
 from unittest import mock
+from types import GenericAlias
 
 import asyncio
 from asyncio import coroutines
@@ -108,6 +108,12 @@ class BaseTaskTests:
         self.loop.set_task_factory(self.new_task)
         self.loop.create_future = lambda: self.new_future(self.loop)
 
+
+    def test_generic_alias(self):
+        task = self.__class__.Task[str]
+        self.assertEqual(task.__args__, (str,))
+        self.assertIsInstance(task, GenericAlias)
+
     def test_task_cancel_message_getter(self):
         async def coro():
             pass