fix: add test, keep backwards compatibility

Author: gagik

package.json

@@ -6,12 +6,12 @@
   "exports": {
     ".": {
       "import": {
-        "types": "./dist/esm/index.d.ts",
-        "default": "./dist/esm/index.js"
+        "types": "./dist/lib.d.ts",
+        "default": "./dist/lib.js"
       },
       "require": {
-        "types": "./dist/cjs/index.d.ts",
-        "default": "./dist/cjs/index.js"
+        "types": "./dist/cjs/lib.d.ts",
+        "default": "./dist/cjs/lib.js"
       }
     }
   },
@@ -22,7 +22,7 @@
     "url": "https://github.com/mongodb-js/mongodb-mcp-server.git"
   },
   "bin": {
-    "mongodb-mcp-server": "dist/cjs/index.js"
+    "mongodb-mcp-server": "dist/index.js"
   },
   "publishConfig": {
     "access": "public"
@@ -33,10 +33,10 @@
     "build:update-package-info": "tsx scripts/update-package-info.ts",
     "build:esm": "tsc --project tsconfig.esm.json",
     "build:cjs": "tsc --project tsconfig.cjs.json",
-    "build:package-json": "echo '{\"type\":\"module\"}' > dist/esm/package.json && echo '{\"type\":\"commonjs\"}' > dist/cjs/package.json",
-    "build:chmod": "chmod +x dist/cjs/index.js",
+    "build:package-json": "echo '{\"type\":\"module\"}' > dist/package.json && echo '{\"type\":\"commonjs\"}' > dist/cjs/package.json",
+    "build:chmod": "chmod +x dist/index.js",
     "build": "npm run build:clean && npm run build:update-package-info && npm run build:esm && npm run build:cjs && npm run build:package-json && npm run build:chmod",
-    "inspect": "npm run build && mcp-inspector -- dist/cjs/index.js",
+    "inspect": "npm run build && mcp-inspector -- dist/index.js",
     "prettier": "prettier",
     "check": "npm run build && npm run check:types && npm run check:lint && npm run check:format",
     "check:lint": "eslint .",

src/lib.ts

@@ -0,0 +1,4 @@
+export { Server, type ServerOptions } from "./server.js";
+export { Telemetry } from "./telemetry/telemetry.js";
+export { Session, type SessionOptions } from "./common/session.js";
+export type { UserConfig, ConnectOptions } from "./common/config.js";

test-dual-modules.js

@@ -0,0 +1,46 @@
+import { createRequire } from "module";
+import path from "path";
+import { fileURLToPath } from "url";
+import { describe, it, expect } from "vitest";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+describe("Build Test", () => {
+    it("should successfully require CommonJS module", () => {
+        const require = createRequire(__filename);
+        const cjsPath = path.resolve(__dirname, "../../dist/cjs/lib.js");
+
+        const cjsModule = require(cjsPath) as Record<string, unknown>;
+
+        expect(cjsModule).toBeDefined();
+        expect(typeof cjsModule).toBe("object");
+    });
+
+    it("should successfully import ESM module", async () => {
+        const esmPath = path.resolve(__dirname, "../../dist/lib.js");
+
+        const esmModule = (await import(esmPath)) as Record<string, unknown>;
+
+        expect(esmModule).toBeDefined();
+        expect(typeof esmModule).toBe("object");
+    });
+
+    it("should have matching exports between CommonJS and ESM modules", async () => {
+        // Import CommonJS module
+        const require = createRequire(__filename);
+        const cjsPath = path.resolve(__dirname, "../../dist/cjs/lib.js");
+        const cjsModule = require(cjsPath) as Record<string, unknown>;
+
+        // Import ESM module
+        const esmPath = path.resolve(__dirname, "../../dist/lib.js");
+        const esmModule = (await import(esmPath)) as Record<string, unknown>;
+
+        // Compare exports
+        const cjsKeys = Object.keys(cjsModule).sort();
+        const esmKeys = Object.keys(esmModule).sort();
+
+        expect(cjsKeys).toEqual(esmKeys);
+        expect(cjsKeys).toEqual(["Server", "Session", "Telemetry"]);
+    });
+});

tests/build/test-dual-modules.js

@@ -3,7 +3,7 @@
   "compilerOptions": {
     "module": "esnext",
     "moduleResolution": "bundler",
-    "outDir": "./dist/esm",
+    "outDir": "./dist",
     "declaration": true,
     "declarationMap": true
   }