6a231375d5
- Fixed response structure mismatch in 67 failing tests - Updated tests to use response.content[0] instead of response[0] - Tests now correctly handle MCP SDK's content array structure - All 30 MCP protocol integration tests now pass Tech debt: Need to add proper TypeScript types for MCP responses to replace current 'as any' assertions (tracked separately) 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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
# 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
- The InMemoryTransport from MCP SDK has some limitations with connection lifecycle
- Tests use the actual database, so they require
data/nodes.dbto exist - Some tests are currently skipped due to transport issues (being worked on)
Future Improvements
- Mock the database for true unit testing
- Add WebSocket transport tests
- Add authentication/authorization tests
- Add rate limiting tests
- Add more performance benchmarks