"Fix" the failing asyncio tests by adding a sleep() call

tests/test_tcp.py

@@ -133,6 +133,15 @@ async def start_server():
             self.loop.call_soon(srv.close)
             await srv.wait_closed()
 
+            if (
+                self.implementation == 'asyncio'
+                and sys.version_info[:3] >= (3, 12, 0)
+            ):
+                # asyncio regression in 3.12 -- wait_closed()
+                # doesn't wait for `close()` to actually complete.
+                # https://github.com/python/cpython/issues/79033
+                await asyncio.sleep(1)
+
             # Check that the server cleaned-up proxy-sockets
             for srv_sock in srv_socks:
                 self.assertEqual(srv_sock.fileno(), -1)
@@ -168,6 +177,15 @@ async def start_server_sock():
             srv.close()
             await srv.wait_closed()
 
+            if (
+                self.implementation == 'asyncio'
+                and sys.version_info[:3] >= (3, 12, 0)
+            ):
+                # asyncio regression in 3.12 -- wait_closed()
+                # doesn't wait for `close()` to actually complete.
+                # https://github.com/python/cpython/issues/79033
+                await asyncio.sleep(1)
+
             # Check that the server cleaned-up proxy-sockets
             for srv_sock in srv_socks:
                 self.assertEqual(srv_sock.fileno(), -1)
@@ -205,6 +223,15 @@ async def start_server_ephemeral_ports():
                 self.loop.call_soon(srv.close)
                 await srv.wait_closed()
 
+                if (
+                    self.implementation == 'asyncio'
+                    and sys.version_info[:3] >= (3, 12, 0)
+                ):
+                    # asyncio regression in 3.12 -- wait_closed()
+                    # doesn't wait for `close()` to actually complete.
+                    # https://github.com/python/cpython/issues/79033
+                    await asyncio.sleep(1)
+
                 # Check that the server cleaned-up proxy-sockets
                 for srv_sock in srv_socks:
                     self.assertEqual(srv_sock.fileno(), -1)

tests/test_unix.py

@@ -81,6 +81,15 @@ async def start_server():
                     self.loop.call_soon(srv.close)
                     await srv.wait_closed()
 
+                    if (
+                        self.implementation == 'asyncio'
+                        and sys.version_info[:3] >= (3, 12, 0)
+                    ):
+                        # asyncio regression in 3.12 -- wait_closed()
+                        # doesn't wait for `close()` to actually complete.
+                        # https://github.com/python/cpython/issues/79033
+                        await asyncio.sleep(1)
+
                     # Check that the server cleaned-up proxy-sockets
                     for srv_sock in srv_socks:
                         self.assertEqual(srv_sock.fileno(), -1)
@@ -116,6 +125,15 @@ async def start_server_sock(start_server):
                     self.loop.call_soon(srv.close)
                     await srv.wait_closed()
 
+                    if (
+                        self.implementation == 'asyncio'
+                        and sys.version_info[:3] >= (3, 12, 0)
+                    ):
+                        # asyncio regression in 3.12 -- wait_closed()
+                        # doesn't wait for `close()` to actually complete.
+                        # https://github.com/python/cpython/issues/79033
+                        await asyncio.sleep(1)
+
                     # Check that the server cleaned-up proxy-sockets
                     for srv_sock in srv_socks:
                         self.assertEqual(srv_sock.fileno(), -1)