From e8d1f885265fbc98b9bf147765daa33b2e055001 Mon Sep 17 00:00:00 2001
From: Juan Cruz <juancruzmencia@gmail.com>
Date: Thu, 9 Nov 2023 21:58:15 +0100
Subject: [PATCH] fix: aiohttp 3.9 _writer can't await

---
 aioresponses/core.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/aioresponses/core.py b/aioresponses/core.py
index dc70961..6f1828e 100644
--- a/aioresponses/core.py
+++ b/aioresponses/core.py
@@ -156,7 +156,10 @@ def _build_response(self, url: 'Union[URL, str]',
             method=method,
             headers=CIMultiDictProxy(CIMultiDict(**request_headers)),
         )
-        kwargs['writer'] = Mock()
+        if AIOHTTP_VERSION >= parse_version("3.9.0b1"):
+            kwargs['writer'] = AsyncMock()()
+        else:
+            kwargs['writer'] = Mock()
         kwargs['continue100'] = None
         kwargs['timer'] = TimerNoop()
         kwargs['traces'] = []