rmcp 1.5.0

Rust SDK for Model Context Protocol
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
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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217

use std::collections::HashMap;

use rmcp::model::*;
use serde_json::json;

#[test]
fn test_completion_context_serialization() {
    let mut args = HashMap::new();
    args.insert("key1".to_string(), "value1".to_string());
    args.insert("key2".to_string(), "value2".to_string());

    let context = CompletionContext::with_arguments(args);

    // Test serialization
    let json = serde_json::to_value(&context).unwrap();
    let expected = json!({
        "arguments": {
            "key1": "value1",
            "key2": "value2"
        }
    });
    assert_eq!(json, expected);

    // Test deserialization
    let deserialized: CompletionContext = serde_json::from_value(expected).unwrap();
    assert_eq!(deserialized, context);
}

#[test]
fn test_completion_context_methods() {
    let mut args = HashMap::new();
    args.insert("city".to_string(), "San Francisco".to_string());
    args.insert("country".to_string(), "USA".to_string());

    let context = CompletionContext::with_arguments(args);

    assert!(context.has_arguments());
    assert_eq!(
        context.get_argument("city"),
        Some(&"San Francisco".to_string())
    );
    assert_eq!(context.get_argument("missing"), None);

    let names: Vec<&str> = context.argument_names().collect();
    assert!(names.contains(&"city"));
    assert!(names.contains(&"country"));
    assert_eq!(names.len(), 2);
}

#[test]
fn test_complete_request_param_serialization() {
    let mut args = HashMap::new();
    args.insert("previous_input".to_string(), "test".to_string());

    let request = CompleteRequestParams::new(
        Reference::for_prompt("weather_prompt"),
        ArgumentInfo {
            name: "location".to_string(),
            value: "San".to_string(),
        },
    )
    .with_context(CompletionContext::with_arguments(args));

    let json = serde_json::to_value(&request).unwrap();
    assert!(json["ref"]["name"].as_str().unwrap() == "weather_prompt");
    assert!(json["argument"]["name"].as_str().unwrap() == "location");
    assert!(json["argument"]["value"].as_str().unwrap() == "San");
    assert!(
        json["context"]["arguments"]["previous_input"]
            .as_str()
            .unwrap()
            == "test"
    );
}

#[test]
fn test_completion_info_validation() {
    // Valid completion with less than max values
    let values = vec!["option1".to_string(), "option2".to_string()];
    let completion = CompletionInfo::new(values.clone()).unwrap();
    assert_eq!(completion.values, values);
    assert!(completion.validate().is_ok());

    // Test max values limit
    let many_values: Vec<String> = (0..=CompletionInfo::MAX_VALUES)
        .map(|i| format!("option_{}", i))
        .collect();
    let result = CompletionInfo::new(many_values);
    assert!(result.is_err());
}

#[test]
fn test_completion_info_helper_methods() {
    let values = vec!["test1".to_string(), "test2".to_string()];

    // Test with_all_values
    let completion = CompletionInfo::with_all_values(values.clone()).unwrap();
    assert_eq!(completion.values, values);
    assert_eq!(completion.total, Some(2));
    assert_eq!(completion.has_more, Some(false));
    assert!(!completion.has_more_results());
    assert_eq!(completion.total_available(), Some(2));

    // Test with_pagination
    let paginated = CompletionInfo::with_pagination(values.clone(), Some(10), true).unwrap();
    assert_eq!(paginated.values, values);
    assert_eq!(paginated.total, Some(10));
    assert_eq!(paginated.has_more, Some(true));
    assert!(paginated.has_more_results());
    assert_eq!(paginated.total_available(), Some(10));
}

#[test]
fn test_completion_info_bounds() {
    // Test exactly at the limit
    let max_values: Vec<String> = (0..CompletionInfo::MAX_VALUES)
        .map(|i| format!("value_{}", i))
        .collect();
    assert!(CompletionInfo::new(max_values).is_ok());

    // Test over the limit
    let over_limit: Vec<String> = (0..=CompletionInfo::MAX_VALUES)
        .map(|i| format!("value_{}", i))
        .collect();
    assert!(CompletionInfo::new(over_limit).is_err());
}

#[test]
fn test_reference_convenience_methods() {
    let prompt_ref = Reference::for_prompt("test_prompt");
    assert_eq!(prompt_ref.reference_type(), "ref/prompt");
    assert_eq!(prompt_ref.as_prompt_name(), Some("test_prompt"));
    assert_eq!(prompt_ref.as_resource_uri(), None);

    let resource_ref = Reference::for_resource("file://path/to/resource");
    assert_eq!(resource_ref.reference_type(), "ref/resource");
    assert_eq!(
        resource_ref.as_resource_uri(),
        Some("file://path/to/resource")
    );
    assert_eq!(resource_ref.as_prompt_name(), None);
}

#[test]
fn test_completion_serialization_format() {
    // Test that completion follows MCP 2025-06-18 specification format
    let completion = CompletionInfo {
        values: vec!["value1".to_string(), "value2".to_string()],
        total: Some(2),
        has_more: Some(false),
    };

    let json = serde_json::to_value(&completion).unwrap();

    // Verify JSON structure matches specification
    assert!(json.is_object());
    assert!(json["values"].is_array());
    assert_eq!(json["values"].as_array().unwrap().len(), 2);
    assert_eq!(json["total"].as_u64().unwrap(), 2);
    assert!(!json["hasMore"].as_bool().unwrap());
}

#[test]
fn test_resource_reference() {
    // Test that ResourceReference works correctly
    let resource_ref = ResourceReference {
        uri: "test://uri".to_string(),
    };

    // Test that ResourceReference works correctly
    let another_ref = ResourceReference {
        uri: "test://uri".to_string(),
    };

    // They should be equivalent
    assert_eq!(resource_ref.uri, another_ref.uri);
}

#[test]
fn test_complete_result_default() {
    let result = CompleteResult::default();
    assert!(result.completion.values.is_empty());
    assert_eq!(result.completion.total, None);
    assert_eq!(result.completion.has_more, None);
}

#[test]
fn test_completion_context_empty() {
    let context = CompletionContext::new();
    assert!(!context.has_arguments());
    assert_eq!(context.get_argument("any"), None);
    assert!(context.argument_names().count() == 0);
}

#[test]
fn test_mcp_schema_compliance() {
    // Test that our types serialize correctly according to MCP specification
    let request = CompleteRequestParams::new(
        Reference::for_resource("file://{path}"),
        ArgumentInfo {
            name: "path".to_string(),
            value: "src/".to_string(),
        },
    );

    let json_str = serde_json::to_string(&request).unwrap();
    let parsed: serde_json::Value = serde_json::from_str(&json_str).unwrap();

    // Verify key structure matches MCP spec
    assert!(parsed["ref"].is_object());
    assert!(parsed["argument"].is_object());
    assert!(parsed["argument"]["name"].is_string());
    assert!(parsed["argument"]["value"].is_string());

    // Verify type tag is correct
    assert_eq!(parsed["ref"]["type"].as_str().unwrap(), "ref/resource");
}