mcp_core/tools/
test_tool.rs

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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
use async_trait::async_trait;

use crate::{error::McpError, server};

use super::{Tool, ToolContent, ToolProvider, ToolResult};

pub struct TestTool;

impl TestTool {
    pub fn new() -> Self {
        TestTool
    }
}

#[async_trait]
impl ToolProvider for TestTool {
    async fn get_tool(&self) -> Tool {
        Tool {
            name: "test_tool".to_string(),
            description: "Test Tool".to_string(),
            input_schema: serde_json::from_str(
                r#"{
                "type": "object",
                "properties": {
                    "test": {
                        "type": "string",
                        "description": "Test property"
                    }
                },
                "required": ["test"]
            }"#,
            )
            .unwrap(),
        }
    }

    async fn execute(&self, arguments: serde_json::Value) -> Result<ToolResult, McpError> {
        Ok(ToolResult {
            content: vec![],
            is_error: false,
        })
    }
}

pub struct PingTool;

impl PingTool {
    pub fn new() -> Self {
        PingTool
    }
}

#[async_trait]
impl ToolProvider for PingTool {
    async fn get_tool(&self) -> Tool {
        Tool {
            name: "ping_tool".to_string(),
            description: "Ping Tool".to_string(),
            input_schema: serde_json::from_str(
                r#"{
                "type": "object",
                "properties": {
                    "server": {
                        "type": "string",
                        "description": "Server to ping"
                    }
                },
                "required": ["server"]
            }"#,
            )
            .unwrap(),
        }
    }

    async fn execute(&self, arguments: serde_json::Value) -> Result<ToolResult, McpError> {
        let server = arguments
            .get("server")
            .and_then(|s| s.as_str())
            .unwrap_or("localhost");
        let res = reqwest::get(format!("http://{}", server))
            .await
            .map_err(|e| McpError::ToolExecutionError(e.to_string()))?;
        let body = res
            .text()
            .await
            .map_err(|e| McpError::ToolExecutionError(e.to_string()))?;
        Ok(ToolResult {
            content: vec![ToolContent::Text { text: body }],
            is_error: false,
        })
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::{
        protocol::{RequestHandler, ServerCapabilities},
        server::{config::ServerConfig, McpServer},
    };
    use serde_json::{json, Value};

    struct TestHandler;

    #[async_trait]
    impl RequestHandler for TestHandler {
        async fn handle_request(
            &self,
            method: &str,
            params: Option<Value>,
        ) -> Result<Value, McpError> {
            Ok(json!({"success": true}))
        }

        async fn handle_notification(
            &self,
            _method: &str,
            _params: Option<Value>,
        ) -> Result<(), McpError> {
            Ok(())
        }

        fn get_capabilities(&self) -> ServerCapabilities {
            ServerCapabilities {
                name: "Test".to_string(),
                version: "1.0".to_string(),
                protocol_version: "1.0".to_string(),
                capabilities: vec!["test".to_string()],
            }
        }
    }

    #[tokio::test]
    async fn test_custom_handler() {
        let handler = TestHandler;
        let server = McpServer::new(ServerConfig::default(), handler);
        let response = server
            .process_request("test", Some(json!({})))
            .await
            .unwrap();
        assert_eq!(response, json!({"success": true}));
    }
}