Guard against possible UNIX domain socket cleanup in Python 3.13

This commit adds guards around code which cleans up UNIX domain
sockets, to protect against a change proposed at
python/cpython#111246
which would cause the socket to clean itself up on close.

tests/test_agent.py

@@ -85,7 +85,10 @@ async def stop(self):
         self._server.close()
         await self._server.wait_closed()
 
-        os.remove(self._path)
+        try:
+            os.remove(self._path)
+        except OSError:
+            pass
 
 
 class _TestAgent(AsyncTestCase):

tests/test_forward.py

@@ -651,7 +651,10 @@ async def test_forward_local_path_to_port(self):
             async with conn.forward_local_path_to_port('local', '', 7):
                 await self._check_local_unix_connection('local')
 
-        os.remove('local')
+        try:
+            os.remove('local')
+        except OSError:
+            pass
 
     @unittest.skipIf(sys.platform == 'win32',
                      'skip UNIX domain socket tests on Windows')
@@ -665,7 +668,10 @@ async def test_forward_local_path_to_port_failure(self):
             with self.assertRaises(OSError):
                 await conn.forward_local_path_to_port('local', '', 7)
 
-        os.remove('local')
+        try:
+            os.remove('local')
+        except OSError:
+            pass
 
     @asynctest
     async def test_forward_local_port_pause(self):
@@ -798,7 +804,11 @@ async def test_forward_remote_port_to_path(self):
 
         server.close()
         await server.wait_closed()
-        os.remove('local')
+
+        try:
+            os.remove('local')
+        except OSError:
+            pass
 
     @asynctest
     async def test_forward_remote_specific_port(self):
@@ -1020,7 +1030,10 @@ async def test_unix_server(self):
             await listener.wait_closed()
             listener.close()
 
-        os.remove('echo')
+        try:
+            os.remove('echo')
+        except OSError:
+            pass
 
     @asynctest
     async def test_unix_server_open(self):
@@ -1053,7 +1066,10 @@ async def test_unix_server_non_async(self):
             async with conn.start_unix_server(_unix_listener_non_async, path):
                 await self._check_local_unix_connection('echo')
 
-        os.remove('echo')
+        try:
+            os.remove('echo')
+        except OSError:
+            pass
 
     @asynctest
     async def test_unix_server_failure(self):
@@ -1071,7 +1087,10 @@ async def test_forward_local_path(self):
             async with conn.forward_local_path('local', '/echo'):
                 await self._check_local_unix_connection('local')
 
-        os.remove('local')
+        try:
+            os.remove('local')
+        except OSError:
+            pass
 
     @asynctest
     async def test_forward_local_port_to_path_accept_handler(self):
@@ -1149,8 +1168,11 @@ async def test_forward_remote_path(self):
         server.close()
         await server.wait_closed()
 
-        os.remove('echo')
-        os.remove('local')
+        try:
+            os.remove('echo')
+            os.remove('local')
+        except OSError:
+            pass
 
     @asynctest
     async def test_forward_remote_path_to_port(self):
@@ -1167,11 +1189,14 @@ async def test_forward_remote_path_to_port(self):
                     path, '127.0.0.1', server_port):
                 await self._check_local_unix_connection('echo')
 
-        os.remove('echo')
-
         server.close()
         await server.wait_closed()
 
+        try:
+            os.remove('echo')
+        except OSError:
+            pass
+
     @asynctest
     async def test_forward_remote_path_failure(self):
         """Test failure of forwarding a remote UNIX domain path"""
@@ -1184,7 +1209,10 @@ async def test_forward_remote_path_failure(self):
             with self.assertRaises(asyncssh.ChannelListenError):
                 await conn.forward_remote_path(path, 'local')
 
-        os.remove('echo')
+        try:
+            os.remove('echo')
+        except OSError:
+            pass
 
     @asynctest
     async def test_forward_remote_path_not_permitted(self):