MCP Time Server Node

/** * Tests for MCP SDK Adapter error mapping * * These tests verify that our error types map correctly to MCP SDK error codes */ import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js'; import { mapToMcpError } from '../../../src/adapters/mcp-sdk/mapper'; import { TimeCalculationError, TimezoneError, BusinessHoursError, HolidayDataError, DateParsingError, ValidationError, } from '../../../src/adapters/mcp-sdk/errors'; describe('MCP SDK Adapter - Error Mapping', () => { describe('mapToMcpError', () => { it('should map ValidationError to InvalidParams', () => { const error = new ValidationError('Missing required field', { field: 'timezone' }); const mcpError = mapToMcpError(error, 'testTool'); expect(mcpError).toBeInstanceOf(McpError); expect(mcpError.code).toBe(ErrorCode.InvalidParams); expect(mcpError.message).toContain('Missing required field'); expect(mcpError.data).toEqual({ field: 'timezone' }); }); it('should map TimezoneError to InvalidParams', () => { const error = new TimezoneError('Invalid timezone: XYZ'); const mcpError = mapToMcpError(error, 'convertTimezone'); expect(mcpError).toBeInstanceOf(McpError); expect(mcpError.code).toBe(ErrorCode.InvalidParams); expect(mcpError.message).toContain('Invalid timezone'); }); it('should map DateParsingError to InvalidParams', () => { const error = new DateParsingError('Could not parse date: invalid'); const mcpError = mapToMcpError(error, 'addTime'); expect(mcpError).toBeInstanceOf(McpError); expect(mcpError.code).toBe(ErrorCode.InvalidParams); expect(mcpError.message).toContain('Could not parse date'); }); it('should map BusinessHoursError to InvalidRequest', () => { const error = new BusinessHoursError('Invalid business hours configuration'); const mcpError = mapToMcpError(error, 'calculateBusinessHours'); expect(mcpError).toBeInstanceOf(McpError); expect(mcpError.code).toBe(ErrorCode.InvalidRequest); expect(mcpError.message).toContain('business hours'); }); it('should map HolidayDataError to InvalidRequest', () => { const error = new HolidayDataError('Failed to fetch holiday data'); const mcpError = mapToMcpError(error, 'getBusinessDays'); expect(mcpError).toBeInstanceOf(McpError); expect(mcpError.code).toBe(ErrorCode.InvalidRequest); expect(mcpError.message).toContain('holiday data'); }); it('should map TimeCalculationError to InternalError', () => { const error = new TimeCalculationError('Overflow in time calculation'); const mcpError = mapToMcpError(error, 'addTime'); expect(mcpError).toBeInstanceOf(McpError); expect(mcpError.code).toBe(ErrorCode.InternalError); expect(mcpError.message).toContain('time calculation'); }); it('should return McpError unchanged if already McpError', () => { const originalError = new McpError(ErrorCode.InvalidParams, 'Test error'); const mcpError = mapToMcpError(originalError, 'testTool'); expect(mcpError).toBe(originalError); }); it('should map generic Error to InternalError', () => { const error = new Error('Something went wrong'); const mcpError = mapToMcpError(error, 'testTool'); expect(mcpError).toBeInstanceOf(McpError); expect(mcpError.code).toBe(ErrorCode.InternalError); expect(mcpError.message).toContain('Something went wrong'); }); it('should map string error to InternalError', () => { const error = 'String error message'; const mcpError = mapToMcpError(error, 'testTool'); expect(mcpError).toBeInstanceOf(McpError); expect(mcpError.code).toBe(ErrorCode.InternalError); expect(mcpError.message).toContain('String error message'); }); it('should map unknown error to InternalError', () => { const error = { weird: 'object' }; const mcpError = mapToMcpError(error, 'testTool'); expect(mcpError).toBeInstanceOf(McpError); expect(mcpError.code).toBe(ErrorCode.InternalError); expect(mcpError.message).toContain('[testTool]'); }); it('should include tool name in error for generic errors', () => { const error = new Error('Generic failure'); const mcpError = mapToMcpError(error, 'mySpecialTool'); expect(mcpError.message).toContain('[mySpecialTool]'); expect(mcpError.message).toContain('Generic failure'); }); it('should preserve error details when mapping', () => { const details = { input: '2025-13-45', format: 'YYYY-MM-DD', reason: 'Invalid month', }; const error = new DateParsingError('Invalid date format', details); const mcpError = mapToMcpError(error, 'formatTime'); expect(mcpError.data).toEqual(details); }); }); });