наблюдаемость: измерять бюджет каталога MCP

crates/crank-core/tests/unit.rs

@@ -1,3 +1,4 @@
 mod unit {
+    mod tool_catalog;
     mod tool_quality;
 }

crates/crank-core/tests/unit/tool_catalog.rs

@@ -0,0 +1,79 @@
+use crank_core::{
+    ToolCatalogAnalysis, ToolQualityCatalogTool, ToolQualitySeverity, analyze_tool_catalog,
+};
+use serde_json::json;
+
+#[test]
+fn measures_the_actual_serialized_catalog_definition() {
+    let definitions = vec![json!({
+        "name": "get_exchange_rate",
+        "title": "Получить курс",
+        "description": "Возвращает актуальный курс выбранной валютной пары.",
+        "inputSchema": {
+            "type": "object",
+            "properties": {
+                "base": {"type": "string"},
+                "quote": {"type": "string"}
+            },
+            "required": ["base", "quote"]
+        }
+    })];
+
+    let analysis = analyze_tool_catalog(&[tool("get_exchange_rate")], &definitions).unwrap();
+    let expected_bytes = serde_json::to_vec(&definitions[0]).unwrap().len();
+
+    assert_eq!(analysis.budget.tool_count, 1);
+    assert_eq!(analysis.budget.serialized_bytes, expected_bytes);
+    assert!(analysis.budget.estimated_context_tokens > 0);
+    assert_eq!(
+        analysis.budget.largest_tool_estimated_context_tokens,
+        analysis.budget.estimated_context_tokens
+    );
+}
+
+#[test]
+fn warns_when_actual_catalog_exceeds_context_budget() {
+    let tools = (0..9)
+        .map(|index| tool(&format!("large_tool_{index}")))
+        .collect::<Vec<_>>();
+    let definitions = (0..9)
+        .map(|index| {
+            json!({
+                "name": format!("large_tool_{index}"),
+                "description": "x".repeat(1_500),
+                "inputSchema": {"type": "object", "properties": {}}
+            })
+        })
+        .collect::<Vec<_>>();
+
+    let analysis = analyze_tool_catalog(&tools, &definitions).unwrap();
+
+    assert!(analysis.budget.exceeds_recommended_budget);
+    assert!(has_warning(&analysis, "agent_catalog_context_budget_high"));
+}
+
+#[test]
+fn rejects_mismatch_between_catalog_tools_and_definitions() {
+    let error = analyze_tool_catalog(&[tool("one")], &[]).unwrap_err();
+
+    assert_eq!(
+        error.to_string(),
+        "tool catalog and definitions length mismatch"
+    );
+}
+
+fn tool(name: &str) -> ToolQualityCatalogTool {
+    ToolQualityCatalogTool {
+        name: name.to_owned(),
+        display_name: name.to_owned(),
+        description: format!("Инструмент {name} выполняет одну конкретную операцию."),
+    }
+}
+
+fn has_warning(analysis: &ToolCatalogAnalysis, code: &str) -> bool {
+    analysis
+        .quality
+        .findings
+        .iter()
+        .any(|finding| finding.code == code && finding.severity == ToolQualitySeverity::Warning)
+}