Advanced MCP Server

import { Tool, ToolResult, ToolParameter } from './Tool'; import { exec } from 'child_process'; import { promisify } from 'util'; const execPromise = promisify(exec); export class TestRunnerTool implements Tool { name = 'test-runner'; description = 'Runs tests and reports results'; parameters: ToolParameter[] = [ { name: 'pattern', type: 'string', description: 'Test file pattern to run', required: false, default: 'src/**/*.test.ts' }, { name: 'watch', type: 'boolean', description: 'Run tests in watch mode', required: false, default: false } ]; async execute(args: { pattern?: string; watch?: boolean }): Promise<ToolResult> { try { const pattern = args.pattern || 'src/**/*.test.ts'; const watch = args.watch || false; let command = `npx jest ${pattern}`; if (watch) { command += ' --watch'; } // Run tests with a timeout const result = await Promise.race([ execPromise(command), new Promise((_, reject) => setTimeout(() => reject(new Error('Test execution timeout')), 60000) ) ]); return { success: true, data: { pattern, watch, output: (result as any).stdout, errors: (result as any).stderr } }; } catch (error: any) { // Jest returns non-zero exit codes for test failures // This is expected behavior, not an error if (error.stdout || error.stderr) { return { success: true, data: { pattern: args.pattern || 'src/**/*.test.ts', watch: args.watch || false, output: error.stdout || '', errors: error.stderr || '', exitCode: error.code || 1 } }; } return { success: false, error: error.message }; } } }