From 5f4ae86a639fb84260d622e31468da21dc468265 Mon Sep 17 00:00:00 2001
From: zhanpon <pon.zhan@gmail.com>
Date: Thu, 24 Nov 2022 18:10:38 +0900
Subject: gh-94808: [coverage] Add an asynchronous generator test where the
 generator is already running (#97672)

---
 Lib/test/test_asyncgen.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Lib/test/test_asyncgen.py b/Lib/test/test_asyncgen.py
index f6184c0..0421efd 100644
--- a/Lib/test/test_asyncgen.py
+++ b/Lib/test/test_asyncgen.py
@@ -378,6 +378,19 @@ class AsyncGenTest(unittest.TestCase):
 
         self.compare_generators(sync_gen_wrapper(), async_gen_wrapper())
 
+    def test_async_gen_exception_12(self):
+        async def gen():
+            await anext(me)
+            yield 123
+
+        me = gen()
+        ai = me.__aiter__()
+        an = ai.__anext__()
+
+        with self.assertRaisesRegex(RuntimeError,
+                r'anext\(\): asynchronous generator is already running'):
+            an.__next__()
+
     def test_async_gen_3_arg_deprecation_warning(self):
         async def gen():
             yield 123
-- 
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