n8n-MCP

# MCP Protocol Integration Tests This directory contains comprehensive integration tests for the Model Context Protocol (MCP) implementation in n8n-mcp. ## Test Structure ### Core Tests - **basic-connection.test.ts** - Tests basic MCP server functionality and tool execution - **protocol-compliance.test.ts** - Tests JSON-RPC 2.0 compliance and protocol specifications - **tool-invocation.test.ts** - Tests all MCP tool categories and their invocation - **session-management.test.ts** - Tests session lifecycle, multiple sessions, and recovery - **error-handling.test.ts** - Tests error handling, edge cases, and invalid inputs - **performance.test.ts** - Performance benchmarks and stress tests ### Helper Files - **test-helpers.ts** - TestableN8NMCPServer wrapper for testing with custom transports ## Running Tests ```bash # Run all MCP protocol tests npm test -- tests/integration/mcp-protocol/ # Run specific test file npm test -- tests/integration/mcp-protocol/basic-connection.test.ts # Run with coverage npm test -- tests/integration/mcp-protocol/ --coverage ``` ## Test Coverage These tests ensure: - ✅ JSON-RPC 2.0 protocol compliance - ✅ Proper request/response handling - ✅ All tool categories are tested - ✅ Error handling and edge cases - ✅ Session management and lifecycle - ✅ Performance and scalability ## Known Issues 1. The InMemoryTransport from MCP SDK has some limitations with connection lifecycle 2. Tests use the actual database, so they require `data/nodes.db` to exist 3. Some tests are currently skipped due to transport issues (being worked on) ## Future Improvements 1. Mock the database for true unit testing 2. Add WebSocket transport tests 3. Add authentication/authorization tests 4. Add rate limiting tests 5. Add more performance benchmarks