From 8ce148edcc41e576a1810937cbd56059f7d2d91a Mon Sep 17 00:00:00 2001
From: Yiyang Zhan <pon.zhan@gmail.com>
Date: Thu, 29 Sep 2022 20:05:40 +0900
Subject: [PATCH] [coverage] Add an asynchronous generator test
Cover the error condition of 'asynchronous generator is already running'
---
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 f6184c0cab4694..0421efdbf9dac9 100644
--- a/Lib/test/test_asyncgen.py
+++ b/Lib/test/test_asyncgen.py
@@ -378,6 +378,19 @@ async def async_gen_wrapper():
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