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krep-mcp-server Testing Summary

Overview

This document summarizes the testing process for the krep-mcp-server, focusing on MCP protocol compliance and compatibility with various clients.

Test Suites

1. MCP Inspector Compatibility Test

File: test-mcp-inspector.js

This test validates that the krep-mcp-server strictly follows the MCP protocol format required by MCP Inspector.

Test Components:

  • Exact Content-Length header format (Content-Length: N\r\n\r\n)
  • Proper JSON-RPC message structure
  • UTF-8 and binary data handling
  • Error recovery mechanisms
  • Capability reporting

Test Functions:

  • Initialize sequence
  • Search function with file paths
  • Match function with string content
  • Count function for occurrence counting

Results: ✅ The server successfully passes all MCP Inspector compatibility tests

2. Claude Desktop Integration Test

File: test-claude-desktop.js

This test verifies that the krep-mcp-server works properly with Claude Desktop.

Test Components:

  • Environment variable handling (CLAUDE_MCP=true)
  • Initialize sequence
  • Function execution
  • Unicode handling
  • Buffer management for large messages

Test Functions:

  • Initialize with Claude Desktop client info
  • Search function for file patterns
  • Match function for text patterns

Results: ✅ The server successfully passes all Claude Desktop integration tests

3. Unit Tests

Directory: test/unit/

These tests verify individual components of the server:

  • Algorithm selection logic
  • API endpoint correctness
  • Error handling
  • URI parsing
  • Performance metrics

4. Integration Tests

Directory: test/integration/

These tests verify how components work together:

  • SDK integration workflows
  • MCP URI validation
  • MCP protocol compliance
  • Client compatibility

Common Issues Fixed

  1. JSON-RPC Message Format

    • Fixed strict Content-Length header format
    • Ensured proper UTF-8 encoding
    • Implemented atomic message writing

  2. Output Separation

    • Redirected all debug output to stderr
    • Kept stdout clean for JSON-RPC messages only

  3. Buffer Handling

    • Improved handling of binary data
    • Added type checking for Buffer.concat
    • Enhanced chunk accumulation

  4. Error Recovery

    • Added buffer clearing for large accumulations
    • Improved error reporting
    • Enhanced message parsing resilience

Test Environment

  • Node.js v23.7.0
  • macOS Ventura
  • krep 1.2.1

Running Tests

To run the tests:

# MCP Inspector compatibility test
node test-mcp-inspector.js

# Claude Desktop integration test
node test-claude-desktop.js

# All unit and integration tests
npm test

Benchmarks

The test/benchmark.js and test/mcp_benchmark.js files provide performance benchmarks for:

  • Search performance across different pattern sizes
  • Buffer handling with large messages
  • Protocol message parsing speed

Current benchmark results show that the krep-mcp-server maintains high performance while ensuring protocol compliance.