stand-in 0.0.4

A stand-in for your MCP server boilerplate.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71

//! JSON-RPC 2.0 request.

use serde::{Deserialize, Serialize};

/// JSON-RPC 2.0 request.
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct JsonRpcRequest {
    /// Protocol version, always "2.0".
    pub jsonrpc: String,

    /// Request ID. `None` for notifications.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub id: Option<serde_json::Value>,

    /// Method name.
    pub method: String,

    /// Method parameters.
    #[serde(skip_serializing_if = "Option::is_none")]
    pub params: Option<serde_json::Value>,
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_request_serialize() {
        let request = JsonRpcRequest {
            jsonrpc: "2.0".to_string(),
            id: Some(serde_json::json!(1)),
            method: "initialize".to_string(),
            params: Some(serde_json::json!({"key": "value"})),
        };
        let json = serde_json::to_string(&request).unwrap();
        assert!(json.contains("\"jsonrpc\":\"2.0\""));
        assert!(json.contains("\"method\":\"initialize\""));
        assert!(json.contains("\"id\":1"));
    }

    #[test]
    fn test_request_deserialize() {
        let json = r#"{"jsonrpc":"2.0","id":1,"method":"tools/list","params":null}"#;
        let request: JsonRpcRequest = serde_json::from_str(json).unwrap();
        assert_eq!(request.jsonrpc, "2.0");
        assert_eq!(request.id, Some(serde_json::json!(1)));
        assert_eq!(request.method, "tools/list");
    }

    #[test]
    fn test_request_notification_no_id() {
        let json = r#"{"jsonrpc":"2.0","method":"notifications/initialized"}"#;
        let request: JsonRpcRequest = serde_json::from_str(json).unwrap();
        assert_eq!(request.id, None);
        assert_eq!(request.method, "notifications/initialized");
        assert_eq!(request.params, None);
    }

    #[test]
    fn test_request_round_trip() {
        let request = JsonRpcRequest {
            jsonrpc: "2.0".to_string(),
            id: Some(serde_json::json!(42)),
            method: "tools/call".to_string(),
            params: Some(serde_json::json!({"name": "greet"})),
        };
        let json = serde_json::to_string(&request).unwrap();
        let deserialized: JsonRpcRequest = serde_json::from_str(&json).unwrap();
        assert_eq!(request, deserialized);
    }
}