commands: implement response parser for protocol

src/commands/connection_settings/protocol.rs

@@ -1,12 +1,13 @@
 use crate::{
-    Request,
-    commands::{Command, RequestParserResult, ResponseAttributes, ResponseParserError},
+    commands::{expect_property_type, Command, RequestParserResult, ResponseAttributes, ResponseParserError}, Request
 };
 
 pub struct Protocol;
 
+pub type ProtocolResponse = Vec<String>;
+
 impl Command for Protocol {
-    type Response = ();
+    type Response = ProtocolResponse;
     const COMMAND: &'static str = "protocol";
 
     fn parse_request(mut parts: std::str::SplitWhitespace<'_>) -> RequestParserResult<'_> {
@@ -17,6 +18,16 @@ impl Command for Protocol {
     fn parse_response(
         parts: ResponseAttributes<'_>,
     ) -> Result<Self::Response, ResponseParserError<'_>> {
-        unimplemented!()
+        for (k, _) in parts.0.iter().filter(|(k, _)| *k != "feature") {
+            return Err(ResponseParserError::UnexpectedProperty(k));
+        }
+
+        let list = parts
+            .0
+            .into_iter()
+            .map(|(k, v)| Ok(expect_property_type!(Some(v), k, Text).to_string()))
+            .collect::<Result<Vec<_>, ResponseParserError>>()?;
+
+        Ok(list)
     }
 }