MongoDB MCP Server

import { execFile, type ChildProcess } from "child_process"; import { afterEach } from "vitest"; import path from "path"; import { promisify } from "util"; const execFileAsync = promisify(execFile); const CLI_PATH = path.join(import.meta.dirname, "..", "..", "dist", "esm", "index.js"); type RunServerFunction = ({ args, dryRun, stripWhitespace, }: { args: string[]; /** `true` by default so no server is started unnecessarily */ dryRun?: boolean; /** `true` by default so whitespace is stripped from the output */ stripWhitespace?: boolean; }) => Promise<ReturnType<typeof execFileAsync>>; export function useCliRunner(): { runServer: RunServerFunction } { /** * Tracks spawned processes that need to be killed after tests */ const trackedProcesses = new Set<ChildProcess>(); async function runServer({ args, dryRun = true, stripWhitespace = false, }: { args: string[]; /** `true` by default so no server is started unnecessarily */ dryRun?: boolean; /** `true` by default so whitespace is stripped from the output */ stripWhitespace?: boolean; }): ReturnType<RunServerFunction> { const result = await execFileAsync(process.execPath, [CLI_PATH, ...args, ...(dryRun ? ["--dryRun"] : [])]); if (stripWhitespace) { result.stdout = result.stdout.replace(/\s/g, ""); } return result; } // Clean up all processes after tests complete afterEach(() => { for (const proc of trackedProcesses) { if (proc.pid && !proc.killed) { proc.kill("SIGKILL"); } } trackedProcesses.clear(); }); return { runServer, }; }