it works

src/cmd.rs

@@ -484,10 +484,7 @@ impl Cmd {
             Cmd::LIndex(key, index) => lindex_cmd(server, &key, index).await,
             Cmd::LRange(key, start, stop) => lrange_cmd(server, &key, start, stop).await,
             Cmd::FlushDb => flushdb_cmd(server).await,
-            Cmd::Unknow(s) => {
-                println!("\x1b[31;1munknown command: {}\x1b[0m", s);
-                Ok(Protocol::err(&format!("ERR unknown command '{}'", s)))
-            }
+            Cmd::Unknow(s) => Ok(Protocol::err(&format!("ERR unknown command `{}`", s))),
         }
     }
     
@@ -645,24 +642,21 @@ async fn incr_cmd(server: &Server, key: &String) -> Result<Protocol, DBError> {
 }
 
 fn config_get_cmd(name: &String, server: &Server) -> Result<Protocol, DBError> {
-    let mut result = Vec::new();
-    result.push(Protocol::BulkString(name.clone()));
+    let value = match name.as_str() {
+        "dir" => Some(server.option.dir.clone()),
+        "dbfilename" => Some(format!("{}.db", server.selected_db)),
+        "databases" => Some("16".to_string()), // Hardcoded as per original logic
+        _ => None,
+    };
 
-    match name.as_str() {
-        "dir" => {
-            result.push(Protocol::BulkString(server.option.dir.clone()));
-            Ok(Protocol::Array(result))
-        }
-        "dbfilename" => {
-            result.push(Protocol::BulkString(format!("{}.db", server.selected_db)));
-            Ok(Protocol::Array(result))
-        },
-        "databases" => {
-            // This is hardcoded, as the feature was removed
-            result.push(Protocol::BulkString("16".to_string()));
-            Ok(Protocol::Array(result))
-        },
-        _ => Ok(Protocol::Array(vec![])),
+    if let Some(val) = value {
+        Ok(Protocol::Array(vec![
+            Protocol::BulkString(name.clone()),
+            Protocol::BulkString(val),
+        ]))
+    } else {
+        // Return an empty array for unknown config options, which is standard Redis behavior
+        Ok(Protocol::Array(vec![]))
     }
 }