MCP Time Server Node

import { createTestEnvironment } from './helpers/setup'; import { CallToolResultSchema } from '@modelcontextprotocol/sdk/types.js'; describe('Error Handling Integration', () => { describe('Invalid Tool Name', () => { it('should return error for non-existent tool', async () => { const { client, cleanup } = await createTestEnvironment(); try { const response = await client.request( { method: 'tools/call', params: { name: 'non_existent_tool', arguments: {}, }, }, CallToolResultSchema ); // MCP SDK returns errors in the response expect(response.content).toHaveLength(0); expect(response.error).toBeDefined(); const error = response.error as any; expect(error.code).toBe('TOOL_ERROR'); expect(error.message).toBe('Unknown tool: non_existent_tool'); expect(error.details).toEqual({ error: 'Error: Unknown tool: non_existent_tool', name: 'non_existent_tool', }); } finally { await cleanup(); } }); }); describe('Tool Validation Errors', () => { it('should return error for invalid timezone', async () => { const { client, cleanup } = await createTestEnvironment(); try { const response = await client.request( { method: 'tools/call', params: { name: 'convert_timezone', arguments: { time: '2025-01-01T12:00:00Z', from_timezone: 'UTC', to_timezone: 'Invalid/Timezone', }, }, }, CallToolResultSchema ); // Tool validation errors are returned in response.error expect(response.content).toHaveLength(0); expect(response.error).toBeDefined(); const error = response.error as any; expect(error.code).toBe('TOOL_ERROR'); expect(error.message).toContain('Invalid to_timezone: Invalid/Timezone'); } finally { await cleanup(); } }); it('should return error for invalid date format', async () => { const { client, cleanup } = await createTestEnvironment(); try { const response = await client.request( { method: 'tools/call', params: { name: 'add_time', arguments: { time: 'not-a-date', amount: 1, unit: 'days', }, }, }, CallToolResultSchema ); // Tool validation errors are returned in response.error expect(response.content).toHaveLength(0); expect(response.error).toBeDefined(); const error = response.error as any; expect(error.code).toBe('TOOL_ERROR'); expect(error.message).toContain('Invalid time format'); } finally { await cleanup(); } }); }); });