chore(rmcp): improve json schema comparison in tests

Enhances the robustness of JSON schema comparison tests by parsing the schema strings into JSON values before comparison. This change prevents false test failures that could occur due to insignificant differences in whitespace or object key ordering. The test now properly focuses on structural equality rather than exact string matching.

Author: shorwood

crates/rmcp/tests/test_message_schema.rs

@@ -1,4 +1,3 @@
-#[cfg(feature = "schemars")]
 mod tests {
     use rmcp::model::{ClientJsonRpcMessage, ServerJsonRpcMessage};
     use super::*;
@@ -9,14 +8,22 @@ mod tests {
         let schema = schema_for!(ClientJsonRpcMessage);
         let schema_str = serde_json::to_string_pretty(&schema).unwrap();
         let expected = std::fs::read_to_string("tests/test_message_schema/client_json_rpc_message_schema.json").unwrap();
-        assert_eq!(schema_str, expected, "Schema generation for ClientJsonRpcMessage should match expected output");
+        
+        // Parse both strings to JSON values for more robust comparison
+        let schema_json: serde_json::Value = serde_json::from_str(&schema_str).unwrap();
+        let expected_json: serde_json::Value = serde_json::from_str(&expected).unwrap();
+        assert_eq!(schema_json, expected_json, "Schema generation for ClientJsonRpcMessage should match expected output");
     }
 
     #[test]
     fn test_server_json_rpc_message_schema() {
         let schema = schema_for!(ServerJsonRpcMessage);
         let schema_str = serde_json::to_string_pretty(&schema).unwrap();
         let expected = std::fs::read_to_string("tests/test_message_schema/server_json_rpc_message_schema.json").unwrap();
-        assert_eq!(schema_str, expected, "Schema generation for ServerJsonRpcMessage should match expected output");
+        
+        // Parse both strings to JSON values for more robust comparison
+        let schema_json: serde_json::Value = serde_json::from_str(&schema_str).unwrap();
+        let expected_json: serde_json::Value = serde_json::from_str(&expected).unwrap();
+        assert_eq!(schema_json, expected_json, "Schema generation for ServerJsonRpcMessage should match expected output");
     }
 }