Add test

Author: aperez

lldb/source/Commands/CommandObjectProtocolServer.cpp

@@ -93,6 +93,7 @@ class CommandObjectProtocolServerStart : public CommandObjectParsed {
       result.AppendMessageWithFormatv(
           "{0} server started with connection listeners: {1}", protocol,
           address);
+      result.SetStatus(eReturnStatusSuccessFinishNoResult);
     }
   }
 };

lldb/test/API/commands/protocol/TestMCPUnixSocket.py

@@ -0,0 +1,23 @@
+import os
+import tempfile
+
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+
+
+class MCPUnixSocketCommandTestCase(TestBase):
+    @skipIfWindows
+    @no_debug_info_test
+    def test_unix_socket(self):
+        """
+        Test if we can start an MCP protocol-server accepting unix sockets
+        """
+
+        temp_directory = tempfile.TemporaryDirectory()
+        socket_file = os.path.join(temp_directory.name, "mcp.sock")
+
+        self.expect(
+            f"protocol-server start MCP accept://{socket_file}",
+            startstr="MCP server started with connection listeners:",
+            substrs=[f"unix-connect://{socket_file}"],
+        )