test(logging): Add tests for logging (#96)

* test(logging): implement basic logging functionality

* test(logging): add comprehensive server transport tests

crates/rmcp/Cargo.toml

@@ -1,5 +1,3 @@
-
-
 [package]
 name = "rmcp"
 license = { workspace = true }
@@ -25,7 +23,6 @@ tracing = { version = "0.1" }
 tokio-util = { version = "0.7" }
 pin-project-lite = "0.2"
 paste = { version = "1", optional = true }
-
 # for auto generate schema
 schemars = { version = "0.8", optional = true }
 
@@ -103,3 +100,8 @@ name = "test_notification"
 required-features = ["server", "client"]
 path = "tests/test_notification.rs"
 
+[[test]]
+name = "test_logging"
+required-features = ["server", "client"]
+path = "tests/test_logging.rs"
+

crates/rmcp/src/model.rs

@@ -610,8 +610,8 @@ pub type PromptListChangedNotification = NotificationNoParam<PromptListChangedNo
 const_string!(ToolListChangedNotificationMethod = "notifications/tools/list_changed");
 pub type ToolListChangedNotification = NotificationNoParam<ToolListChangedNotificationMethod>;
 // 日志相关
-#[derive(Debug, Serialize, Deserialize, Clone, PartialEq)]
+#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Copy)]
-#[serde(rename_all = "camelCase")]
+#[serde(rename_all = "lowercase")] //match spec
 pub enum LoggingLevel {
     Debug,
     Info,

crates/rmcp/tests/test_logging.rs

@@ -0,0 +1,329 @@
+// cargo test --features "server client" --package rmcp test_logging
+use std::{
+    future::Future,
+    sync::{Arc, Mutex},
+};
+
+use rmcp::{
+    ClientHandler, Error as McpError, Peer, RoleClient, RoleServer, ServerHandler, ServiceExt,
+    model::{
+        LoggingLevel, LoggingMessageNotificationParam, ServerCapabilities, ServerInfo,
+        SetLevelRequestParam,
+    },
+    service::RequestContext,
+};
+use tokio::sync::Notify;
+
+pub struct LoggingClient {
+    receive_signal: Arc<Notify>,
+    received_messages: Arc<Mutex<Vec<LoggingMessageNotificationParam>>>,
+    peer: Option<Peer<RoleClient>>,
+}
+
+impl ClientHandler for LoggingClient {
+    async fn on_logging_message(&self, params: LoggingMessageNotificationParam) {
+        println!("Client: Received log message: {:?}", params);
+        let mut messages = self.received_messages.lock().unwrap();
+        messages.push(params);
+        self.receive_signal.notify_one();
+    }
+
+    fn set_peer(&mut self, peer: Peer<RoleClient>) {
+        self.peer.replace(peer);
+    }
+
+    fn get_peer(&self) -> Option<Peer<RoleClient>> {
+        self.peer.clone()
+    }
+}
+
+pub struct TestServer {}
+
+impl TestServer {
+    fn new() -> Self {
+        Self {}
+    }
+}
+
+impl ServerHandler for TestServer {
+    fn get_info(&self) -> ServerInfo {
+        ServerInfo {
+            capabilities: ServerCapabilities::builder().enable_logging().build(),
+            ..Default::default()
+        }
+    }
+
+    fn set_level(
+        &self,
+        request: SetLevelRequestParam,
+        context: RequestContext<RoleServer>,
+    ) -> impl Future<Output = Result<(), McpError>> + Send + '_ {
+        let peer = context.peer;
+        async move {
+            let (data, logger) = match request.level {
+                LoggingLevel::Error => (
+                    serde_json::json!({
+                        "message": "Failed to process request",
+                        "error_code": "E1001",
+                        "error_details": "Connection timeout",
+                        "timestamp": chrono::Utc::now().to_rfc3339(),
+                    }),
+                    Some("error_handler".to_string()),
+                ),
+                LoggingLevel::Debug => (
+                    serde_json::json!({
+                        "message": "Processing request",
+                        "function": "handle_request",
+                        "line": 42,
+                        "context": {
+                            "request_id": "req-123",
+                            "user_id": "user-456"
+                        },
+                        "timestamp": chrono::Utc::now().to_rfc3339(),
+                    }),
+                    Some("debug_logger".to_string()),
+                ),
+                LoggingLevel::Info => (
+                    serde_json::json!({
+                        "message": "System status update",
+                        "status": "healthy",
+                        "metrics": {
+                            "requests_per_second": 150,
+                            "average_latency_ms": 45,
+                            "error_rate": 0.01
+                        },
+                        "timestamp": chrono::Utc::now().to_rfc3339(),
+                    }),
+                    Some("monitoring".to_string()),
+                ),
+                _ => (
+                    serde_json::json!({
+                        "message": format!("Message at level {:?}", request.level),
+                        "timestamp": chrono::Utc::now().to_rfc3339(),
+                    }),
+                    None,
+                ),
+            };
+
+            if let Err(e) = peer
+                .notify_logging_message(LoggingMessageNotificationParam {
+                    level: request.level,
+                    data,
+                    logger,
+                })
+                .await
+            {
+                panic!("Failed to send notification: {}", e);
+            }
+            Ok(())
+        }
+    }
+}
+
+#[tokio::test]
+async fn test_logging_spec_compliance() -> anyhow::Result<()> {
+    let (server_transport, client_transport) = tokio::io::duplex(4096);
+    let receive_signal = Arc::new(Notify::new());
+    let received_messages = Arc::new(Mutex::new(Vec::new()));
+
+    // Start server
+    tokio::spawn(async move {
+        let server = TestServer::new().serve(server_transport).await?;
+
+        // Test server can send messages before level is set
+        server
+            .peer()
+            .notify_logging_message(LoggingMessageNotificationParam {
+                level: LoggingLevel::Info,
+                data: serde_json::json!({
+                    "message": "Server initiated message",
+                    "timestamp": chrono::Utc::now().to_rfc3339(),
+                }),
+                logger: Some("test_server".to_string()),
+            })
+            .await?;
+
+        server.waiting().await?;
+        anyhow::Ok(())
+    });
+
+    let client = LoggingClient {
+        receive_signal: receive_signal.clone(),
+        received_messages: received_messages.clone(),
+        peer: None,
+    }
+    .serve(client_transport)
+    .await?;
+
+    // Verify server-initiated message
+    receive_signal.notified().await;
+    {
+        let mut messages = received_messages.lock().unwrap();
+        assert_eq!(messages.len(), 1, "Should receive server-initiated message");
+        messages.clear();
+    }
+
+    // Test level filtering and message format
+    for level in [
+        LoggingLevel::Emergency,
+        LoggingLevel::Warning,
+        LoggingLevel::Debug,
+    ] {
+        client
+            .peer()
+            .set_level(SetLevelRequestParam { level })
+            .await?;
+        receive_signal.notified().await;
+
+        let mut messages = received_messages.lock().unwrap();
+        let msg = messages.last().unwrap();
+
+        // Verify required fields
+        assert_eq!(msg.level, level);
+        assert!(msg.data.is_object());
+
+        // Verify data format
+        let data = msg.data.as_object().unwrap();
+        assert!(data.contains_key("message"));
+        assert!(data.contains_key("timestamp"));
+
+        // Verify timestamp
+        let timestamp = data["timestamp"].as_str().unwrap();
+        chrono::DateTime::parse_from_rfc3339(timestamp).expect("RFC3339 timestamp");
+
+        messages.clear();
+    }
+
+    client.cancel().await?;
+    Ok(())
+}
+
+#[tokio::test]
+async fn test_logging_user_scenarios() -> anyhow::Result<()> {
+    let (server_transport, client_transport) = tokio::io::duplex(4096);
+    let receive_signal = Arc::new(Notify::new());
+    let received_messages = Arc::new(Mutex::new(Vec::new()));
+
+    // Start server
+    tokio::spawn(async move {
+        let server = TestServer::new().serve(server_transport).await?;
+        server.waiting().await?;
+        anyhow::Ok(())
+    });
+
+    let client = LoggingClient {
+        receive_signal: receive_signal.clone(),
+        received_messages: received_messages.clone(),
+        peer: None,
+    }
+    .serve(client_transport)
+    .await?;
+
+    // Test 1: Error reporting scenario
+    // User should see detailed error information
+    client
+        .peer()
+        .set_level(SetLevelRequestParam {
+            level: LoggingLevel::Error,
+        })
+        .await?;
+    receive_signal.notified().await;
+    {
+        let messages = received_messages.lock().unwrap();
+        let msg = &messages[0];
+        let data = msg.data.as_object().unwrap();
+        assert!(
+            data.contains_key("error_code"),
+            "Error should have an error code"
+        );
+        assert!(
+            data.contains_key("error_details"),
+            "Error should have details"
+        );
+        assert!(
+            data.contains_key("timestamp"),
+            "Should know when error occurred"
+        );
+    }
+
+    // Test 2: Debug scenario
+    // User debugging their application should see detailed information
+    client
+        .peer()
+        .set_level(SetLevelRequestParam {
+            level: LoggingLevel::Debug,
+        })
+        .await?;
+    receive_signal.notified().await;
+    {
+        let messages = received_messages.lock().unwrap();
+        let msg = messages.last().unwrap();
+        let data = msg.data.as_object().unwrap();
+        assert!(
+            data.contains_key("function"),
+            "Debug should show function name"
+        );
+        assert!(data.contains_key("line"), "Debug should show line number");
+        assert!(
+            data.contains_key("context"),
+            "Debug should show execution context"
+        );
+    }
+
+    // Test 3: Production monitoring scenario
+    // User monitoring production should see important status updates
+    client
+        .peer()
+        .set_level(SetLevelRequestParam {
+            level: LoggingLevel::Info,
+        })
+        .await?;
+    receive_signal.notified().await;
+    {
+        let messages = received_messages.lock().unwrap();
+        let msg = messages.last().unwrap();
+        let data = msg.data.as_object().unwrap();
+        assert!(data.contains_key("status"), "Should show system status");
+        assert!(data.contains_key("metrics"), "Should include metrics");
+    }
+
+    client.cancel().await?;
+    Ok(())
+}
+
+#[test]
+fn test_logging_level_serialization() {
+    // Test all levels match spec exactly
+    let test_cases = [
+        (LoggingLevel::Alert, "alert"),
+        (LoggingLevel::Critical, "critical"),
+        (LoggingLevel::Debug, "debug"),
+        (LoggingLevel::Emergency, "emergency"),
+        (LoggingLevel::Error, "error"),
+        (LoggingLevel::Info, "info"),
+        (LoggingLevel::Notice, "notice"),
+        (LoggingLevel::Warning, "warning"),
+    ];
+
+    for (level, expected) in test_cases {
+        let serialized = serde_json::to_string(&level).unwrap();
+        // Remove quotes from serialized string
+        let serialized = serialized.trim_matches('"');
+        assert_eq!(
+            serialized, expected,
+            "LoggingLevel::{:?} should serialize to \"{}\"",
+            level, expected
+        );
+    }
+
+    // Test deserialization from spec strings
+    for (level, spec_string) in test_cases {
+        let deserialized: LoggingLevel =
+            serde_json::from_str(&format!("\"{}\"", spec_string)).unwrap();
+        assert_eq!(
+            deserialized, level,
+            "\"{}\" should deserialize to LoggingLevel::{:?}",
+            spec_string, level
+        );
+    }
+}